Merge retry hardening with DSP cache opt-in

Fix responsive DSP settings controls
Record DSP integration verification and optional cache results
2026-10-10 23:00:32 +08:00 · 2026-10-10 22:50:02 +08:00 · 2026-10-10 19:42:14 +08:00 · 2026-10-10 19:32:12 +08:00 · 2026-10-10 19:29:31 +08:00 · 2026-10-10 19:25:06 +08:00
217 changed files with 388970 additions and 319 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -44,3 +44,9 @@ plans/codex-report*.md
 # performance harness artifacts and temp files
 perf/fixtures/
 perf/.tmp/
 # UI regression screenshots and local measurements
 plans/ui-shots/
 # Transport regression screenshots
 plans/transport-shots/
--- a/frontend/admin.html
+++ b/frontend/admin.html
@@ -6,6 +6,7 @@
  <meta name="robots" content="noindex" />
  <meta name="theme-color" content="#0a0c12" />
  <title>Lyrics Studio</title>
  <link rel="stylesheet" href="download-actions.css" />
  <style>
    :root {
      color-scheme: dark;
@@ -193,7 +194,7 @@
    .transport { display: flex; align-items: center; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
    .round { width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line-2); background: rgba(255,255,255,.06); display: grid; place-items: center; font-size: 12px; font-weight: 800; }
    .round.big { width: 52px; height: 52px; border: 0; background: var(--grad); box-shadow: 0 10px 24px -8px var(--a1); }
-    .round svg { width: 20px; height: 20px; fill: #fff; }
+    .round svg { width: 20px; height: 20px; }
    .clock { font: 600 17px var(--mono); letter-spacing: -.02em; min-width: 108px; text-align: center; }
    .clock b { color: var(--a2); } .clock span { color: var(--text-dim); font-size: 13px; }
    .seg { display: inline-flex; padding: 3px; border-radius: 13px; background: rgba(0,0,0,.35); border: 1px solid var(--line); }
@@ -312,7 +313,9 @@
      main { padding-top: 16px; }
    }
    @media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }
-  </style>
+  .media-shape { display:none; } .media-shape-classic { display:inline; }
 .media-icon { width:18px; height:18px; vertical-align:middle; fill:none; stroke:currentColor; stroke-width:1.8; stroke-linecap:round; stroke-linejoin:round; }
 </style>
 </head>
 <body>
@@ -382,7 +385,7 @@
          <canvas id="wave" height="64"></canvas>
          <div class="transport">
            <button class="round" id="bBack" type="button" title="Back 5 s" aria-label="Back 5 seconds">−5</button>
-            <button class="round big" id="bPlay" type="button" aria-label="Play or pause"><svg viewBox="0 0 24 24"><path id="playIcon" d="M8 5v14l11-7z"/></svg></button>
+            <button class="round big" id="bPlay" type="button" aria-label="Play or pause"><svg id="playIcon" class="transport-icon" data-transport-icon="play" viewBox="0 0 24 24" fill="none" stroke="currentColor" aria-hidden="true"><use class="transport-shape transport-shape-classic" href="#transport-play"/><use class="transport-shape transport-shape-f7-swipe" href="#transport-play-f7-swipe"/><use class="transport-shape transport-shape-glass-stage" href="#transport-play-glass-stage"/><use class="transport-shape transport-shape-bento-hub" href="#transport-play-bento-hub"/></svg></button>
            <button class="round" id="bFwd" type="button" title="Forward 5 s" aria-label="Forward 5 seconds">+5</button>
            <div class="clock"><b id="cur">0:00.00</b> <span>/ <span id="dur">0:00</span></span></div>
            <select class="mini" id="rate" title="Playback speed" aria-label="Playback speed">
@@ -407,7 +410,7 @@
            <label>Shift every timed line by <input class="field" id="shiftBy" type="text" value="0.0" style="flex:0 0 84px;height:36px;text-align:center" /> s</label>
            <button class="btn sm" id="shiftBtn" type="button">Apply</button>
            <span class="grow"></span>
-            <button class="btn sm" id="webBtn" type="button" title="Fetch lyrics from LRCLIB">⤓ Pull from LRCLIB</button>
+            <button class="btn sm" id="webBtn" type="button" title="Fetch lyrics from LRCLIB"><svg class="media-icon" data-media-icon="download" viewBox="0 0 24 24" aria-hidden="true"><use href="#media-download"/></svg> Pull from LRCLIB</button>
            <button class="btn sm" id="rawBtn" type="button">✎ Edit as text</button>
            <label><input type="checkbox" id="follow" checked /> Follow playback</label>
          </div>
@@ -508,7 +511,7 @@
      <div class="card">
        <div class="row" style="margin-bottom:8px"><h2 style="margin:0">Recent edits</h2><span class="grow"></span>
          <button class="btn sm" id="refreshBtn" type="button">↻ Refresh</button>
-          <a class="btn sm" href="/api/admin/notes/export">⤓ Export all (JSON)</a></div>
+          <a class="btn sm" href="/api/admin/notes/export"><svg class="media-icon" data-media-icon="download" viewBox="0 0 24 24" aria-hidden="true"><use href="#media-download"/></svg> Export all (JSON)</a></div>
        <div class="scroll"><table class="tbl" id="revTable"></table></div>
        <pre id="revView" class="hidden" style="margin-top:12px"></pre>
      </div>
@@ -569,6 +572,7 @@
  <nav class="nav" id="tabsBottom" role="tablist"></nav>
 </div>
 <script src="download-actions.js"></script>
 <script src="lyrics-core.js"></script>
 <script>
 (function () {
@@ -1169,8 +1173,8 @@
      const a = new Audio(url); a.preload = 'auto';
      a.addEventListener('timeupdate', tick); a.addEventListener('seeked', tick);
      a.addEventListener('loadedmetadata', () => { if (a.duration) { LE.dur = a.duration; $('dur').textContent = fmtT(a.duration).slice(0, -3); } draw(); });
-      a.addEventListener('play', () => { $('playIcon').setAttribute('d', 'M7 5h4v14H7zM13 5h4v14h-4z'); });
+      a.addEventListener('play', () => { TransportIcons.set($('bPlay'),'pause'); });
-      a.addEventListener('pause', () => { $('playIcon').setAttribute('d', 'M8 5v14l11-7z'); });
+      a.addEventListener('pause', () => { TransportIcons.set($('bPlay'),'play'); });
      a.addEventListener('error', () => say('No playable audio for this song on the server — you can still edit the text.', 'err'));
      a.playbackRate = Number($('rate').value);
      LE.audio = a;
@@ -1196,7 +1200,7 @@
      <div class="ln-tools">
        <input class="tin" value="${esc(fmtT(line.t))}" placeholder="0:00.00" aria-label="Time" />
        <button class="btn" data-act="set" type="button">◎ Stamp now</button>
-        <button class="btn" data-act="seek" type="button">▶ Play here</button>
+        <button class="btn" data-act="seek" type="button">${TransportIcons.svg('play')} Play here</button>
        <button class="btn" data-act="nudge" data-d="-0.2" type="button">−0.2</button>
        <button class="btn" data-act="nudge" data-d="0.2" type="button">+0.2</button>
        <select class="mini" data-kind aria-label="Line type"><option value="line">Line</option><option value="section">Section</option><option value="cue">Cue</option></select>
--- a/frontend/app-bootstrap.test.js
+++ b/frontend/app-bootstrap.test.js
@@ -0,0 +1,84 @@
 const {test}=require('node:test');
 const assert=require('node:assert/strict');
 const {webcrypto,createHash}=require('node:crypto');
 const vm=require('node:vm');
 const {readFileSync}=require('node:fs');
 function fixture({cached=false,tampered=false,enabled=true,loading=false,quota=false,insecure=false,previous=false,contract=1,capture=true,controller=true,parser=false}={}){
 const source='window.appRuns=(window.appRuns||0)+1; window.boot=()=>window.bootRuns=(window.bootRuns||0)+1; document.addEventListener("DOMContentLoaded",boot);',hash=createHash('sha256').update(source).digest('hex'), key='/app.js?v='+hash.slice(0,10);
 const oldSource='window.oldApp=true;'+source, oldHash=createHash('sha256').update(oldSource).digest('hex').slice(0,10), oldKey='/app.js?v='+oldHash;
 const held=new Map(), appended=[],writes=[],listeners={};let calls=0;
 const response=()=>new Response(tampered?'bad':source,{headers:{'X-Asset-Hash':hash.slice(0,10)}});
 if(cached)held.set(key,response());
 if(previous){held.set(oldKey,new Response(oldSource,{headers:{'X-Asset-Hash':oldHash}}));held.set('/__ytp_asset_state',Response.json({previous:{files:{'/app.js':{h:oldHash}},groups:{core:{contract,files:['/app.js']}}}}));}
 const root={crypto:insecure?undefined:webcrypto,TextDecoder,Uint8Array,btoa,console,AssetSyncCore:require('./asset-sync-core'),navigator:{serviceWorker:{controller:controller?{}:null}},Lazy:{captureApp:capture,manifest:{groups:{core:{contract:1,files:['/app.js']}},appCache:enabled,files:{'/app.js':{h:hash.slice(0,10)}}},url:()=>key},fetch:async()=>{calls++;return previous?new Response(oldSource,{headers:{'X-Asset-Hash':oldHash}}):response();},caches:{open:async()=>({match:async k=>held.get(k)?.clone(),put:async(k,r)=>{if(quota)throw Error('quota');held.set(k,r.clone());}})}};
 const doc=root.document={readyState:loading?'loading':'complete',currentScript:parser?{}:null,write:value=>{writes.push(value);vm.runInContext(source,context);},querySelector:()=>({content:"script-src 'self' 'sha256-"+Buffer.from(hash,'hex').toString('base64')+"'"}),addEventListener:(name,fn)=>(listeners[name] ||= []).push(fn),createElement:()=>({remove(){this.removed=true;}}),head:{append(node){appended.push(node);if(node.textContent)vm.runInContext(node.textContent,context);else {queueMicrotask(async()=>{if(previous && node.src===key){const state=await held.get('/__ytp_asset_state').clone().json();if(!root.AssetSyncCore.fallback(root.Lazy.manifest,state.previous,'/app.js'))return node.onerror();vm.runInContext(oldSource,context);}else vm.runInContext(node.src===oldKey?oldSource:source,context);node.onload();});}}}};
 root.window=root;const context=vm.createContext(root);
 vm.runInContext(readFileSync(require.resolve('./section-rail.js'),'utf8'),context);
 return {root,held,appended,writes,listeners,key,calls:()=>calls,doc,response,oldKey};
 }
 test('cold boot caches verified app before execution so worker skips its download',async()=>{
 const f=fixture();await f.root.AppBootstrap.ready;assert.equal(f.calls(),1);assert.ok(f.held.has(f.key));assert.equal(f.root.appRuns,1);assert.equal(f.root.bootRuns,1);assert.equal(f.appended[0].src,undefined);assert.equal(f.appended[0].removed,true);
 });
 test('offline boot reads the exact cached app without network or re-evaluation',async()=>{
 const f=fixture({cached:true});await f.root.AppBootstrap.ready;assert.equal(f.calls(),0);assert.equal(f.root.appRuns,1);assert.equal(f.root.bootRuns,1);
 });
 test('tampered cached bytes are rejected before execution',async()=>{
 const f=fixture({cached:true,tampered:true});await assert.rejects(f.root.AppBootstrap.ready,/hash/);assert.equal(f.root.appRuns,undefined);
 });
 test('native and rollback boot use the original external classic script',async()=>{
 const f=fixture({enabled:false});await f.root.AppBootstrap.ready;assert.equal(f.calls(),0);assert.equal(f.appended[0].src,f.key);assert.equal(f.root.bootRuns,1);
 });
 test('boot waits for the normal DOM event when the parser has not finished',async()=>{
 const f=fixture({loading:true});await f.root.AppBootstrap.ready;assert.equal(f.root.bootRuns,undefined);for(const fn of f.listeners.DOMContentLoaded)fn();assert.equal(f.root.appRuns,1);assert.equal(f.root.bootRuns,1);
 });
 test('quota failure still executes the verified response without deleting saved data',async()=>{
 const f=fixture({quota:true});await f.root.AppBootstrap.ready;assert.equal(f.calls(),1);assert.equal(f.root.appRuns,1);assert.equal(f.root.bootRuns,1);
 });
 test('the early head response is consumed without a second page fetch',async()=>{
 const f=fixture();f.root.Lazy.appResponse=Promise.resolve(f.response());await f.root.AppBootstrap.ready;
 assert.equal(f.calls(),0);assert.ok(f.held.has(f.key));assert.equal(f.root.appRuns,1);
 });
 test('insecure local HTTP boot retains external execution without WebCrypto',async()=>{
 const f=fixture({insecure:true});await f.root.AppBootstrap.ready;assert.equal(f.calls(),0);assert.equal(f.appended[0].src,f.key);assert.equal(f.root.bootRuns,1);
 });
 test('missing current app uses verified same-contract N-1 offline through the controlling worker',async()=>{
 const f=fixture({previous:true});await f.root.AppBootstrap.ready;
 assert.equal(f.appended[0].src,f.oldKey);assert.equal(f.root.oldApp,true);assert.equal(f.root.bootRuns,1);assert.equal(f.held.has(f.key),false);
 });
 test('an incompatible previous core never executes against the new shell',async()=>{
 const f=fixture({previous:true,contract:2});await assert.rejects(f.root.AppBootstrap.ready,/hash/);assert.equal(f.root.appRuns,undefined);
 });
 test('a feature contract change also prevents stale core execution',async()=>{
 const f=fixture({previous:true});f.root.Lazy.manifest.groups['feature:test']={contract:2,files:[]};
 const state=await f.held.get('/__ytp_asset_state').json();state.previous.groups['feature:test']={contract:1,files:[]};f.held.set('/__ytp_asset_state',Response.json(state));
 await assert.rejects(f.root.AppBootstrap.ready,/hash/);assert.equal(f.root.appRuns,undefined);
 });
 test('native-cache engines use their external script and keep normal code-cache behavior',async()=>{
 const f=fixture({capture:false,controller:false});await f.root.AppBootstrap.ready;assert.equal(f.calls(),0);assert.equal(f.appended[0].src,f.key);assert.equal(f.root.bootRuns,1);
 });
 test('native-cache engines still reject an incompatible retained core',async()=>{
 const f=fixture({capture:false,previous:true,contract:2});await assert.rejects(f.root.AppBootstrap.ready,/Unable to load player/);assert.equal(f.root.appRuns,undefined);
 });
 test('native-cache engines use the validated current cache entry without decoding its body',async()=>{
 const f=fixture({capture:false,cached:true});await f.root.AppBootstrap.ready;assert.equal(f.calls(),0);assert.equal(f.appended[0].src,f.key);assert.equal(f.root.bootRuns,1);
 });
 test('native parser boot preserves classic evaluation before the original DOM event',async()=>{
 const f=fixture({capture:false,loading:true,parser:true});
 assert.equal(f.root.appRuns,1);assert.equal(f.root.bootRuns,undefined);
 assert.deepEqual(f.writes,['<script src="'+f.key+'"></script>']);assert.equal(f.appended.length,0);
 for(const fn of f.listeners.DOMContentLoaded)fn();await f.root.AppBootstrap.ready;
 assert.equal(f.root.bootRuns,1);assert.equal(f.calls(),0);
 });
--- a/frontend/app-seams.test.js
+++ b/frontend/app-seams.test.js
@@ -4,13 +4,12 @@ const {readFileSync}=require('node:fs');
 const {createHash}=require('node:crypto');
 const {join}=require('node:path');
 const app=readFileSync(join(__dirname,'app.js'),'utf8');
-test('Phase 4 preserves the exact player, continuity, tracking and queue bodies',()=>{
+test('Phase 4 preserves the exact playback, continuity, tracking and queue bodies',()=>{
 {const start=app.indexOf("const Player = {");assert.ok(start>=0,"Player");const body=app.slice(start,start+30343);assert.equal(createHash('sha256').update(body).digest('hex'),"373df46f4f994717472d26a6bac07449f6ca0a930cb666bfe3895d1dc65aa351","Player body unchanged");}
 {const start=app.indexOf("const Transition = (() => {");assert.ok(start>=0,"Transition");const body=app.slice(start,start+8588);assert.equal(createHash('sha256').update(body).digest('hex'),"71997a537078308a41f0cbf8e29fd1658fb3a199c4f5a25d8af0931f1c2a6d50","Transition body unchanged");}
 {const start=app.indexOf("const Wave = (() => {");assert.ok(start>=0,"Wave");const body=app.slice(start,start+5241);assert.equal(createHash('sha256').update(body).digest('hex'),"7252f4e856c59aef8aabfcd394ce4bcba656110cbd01a1a8af662eeb48166a3c","Wave body unchanged");}
 {const start=app.indexOf("const StatsTrack = (() => {");assert.ok(start>=0,"StatsTrack");const body=app.slice(start,start+1462);assert.equal(createHash('sha256').update(body).digest('hex'),"9aae2631ba3bfad918319579b7120814af06c84949394d04e52c65345332d514","StatsTrack body unchanged");}
 {const start=app.indexOf("function wirePlayerEvents() {");assert.ok(start>=0,"wirePlayerEvents");const body=app.slice(start,start+4913);assert.equal(createHash('sha256').update(body).digest('hex'),"1c5a2b5ce310f6aef6764325eda85a95f47e4f507f2049036ce1da206379908c","wirePlayerEvents body unchanged");}
 {const start=app.indexOf("function updatePlayBtn() {");assert.ok(start>=0,"updatePlayBtn");const body=app.slice(start,start+522);assert.equal(createHash('sha256').update(body).digest('hex'),"1326233af07ae92a5ecc81cc211bd98d21ed5f291dc4eb59d040b8df9baba8c8","updatePlayBtn body unchanged");}
 {const start=app.indexOf("function persist() {");assert.ok(start>=0,"persist");const body=app.slice(start,start+147);assert.equal(createHash('sha256').update(body).digest('hex'),"01e5c5dbc80616266db09b3829dc45b66476a3256b1c169d8e44f4983b24ac45","persist body unchanged");}
 {const start=app.indexOf("function playFromList(list, index, source = '', { playFull = false } = {}) {");assert.ok(start>=0,"playFromList");const body=app.slice(start,start+401);assert.equal(createHash('sha256').update(body).digest('hex'),"f8009c9674b3478959997dca881fb7b9e1ab3708c98e5abdf1958d752e47ee41","playFromList body unchanged");}
 {const start=app.indexOf("function advanceQueue() {");assert.ok(start>=0,"advanceQueue");const body=app.slice(start,start+596);assert.equal(createHash('sha256').update(body).digest('hex'),"be405b9c163e3d41a949ef11f6022ef13115b04083e3b6ad21d97beba1f45ae6","advanceQueue body unchanged");}
@@ -22,16 +21,15 @@ test('Phase 4 preserves the exact player, continuity, tracking and queue bodies'
 {const start=app.indexOf("function startSleepTimer(minutes, { endOfSong = false } = {}) {");assert.ok(start>=0,"startSleepTimer");const body=app.slice(start,start+487);assert.equal(createHash('sha256').update(body).digest('hex'),"f0a93401ab90196096074cb607b28d52c5903e11dbdfb8ddb95114e143af2409","startSleepTimer body unchanged");}
 {const start=app.indexOf("function cancelSleepTimer() {");assert.ok(start>=0,"cancelSleepTimer");const body=app.slice(start,start+253);assert.equal(createHash('sha256').update(body).digest('hex'),"cf396ab758a70eede6af7444539a82ca15af801a9a57024dd5542067e9fa771a","cancelSleepTimer body unchanged");}
 {const start=app.indexOf("function finishSleep() {");assert.ok(start>=0,"finishSleep");const body=app.slice(start,start+662);assert.equal(createHash('sha256').update(body).digest('hex'),"7ee93bf760bad5f39f4644339963918c5b369b2acc554b8e561c1a1f070ac6fb","finishSleep body unchanged");}
- {const start=app.indexOf("const EQ = (() => {");assert.ok(start>=0,"EQ");const body=app.slice(start,start+7917);assert.equal(createHash('sha256').update(body).digest('hex'),"f0cba011c94f33e6fd0ab778021f4c97238262dfa0a8dd40bf3f17149c227528","EQ body unchanged");}
+ {const start=app.indexOf("const EqRender = (() => {");assert.ok(start>=0,"EqRender");const body=app.slice(start,start+5960);assert.match(body,/EQ\.isIOS\(\) && WEB && !data\.settings\?\.jamesDsp\?\.enabled/);const standardBody=body.replace(' && !data.settings?.jamesDsp?.enabled','').slice(0,5912);assert.equal(createHash('sha256').update(standardBody).digest('hex'),"f014dd41dafebc33f09e87be866074afd7a2443c5bb452103a435585353a828f","Standard EqRender body unchanged");}
 {const start=app.indexOf("const EqRender = (() => {");assert.ok(start>=0,"EqRender");const body=app.slice(start,start+5912);assert.equal(createHash('sha256').update(body).digest('hex'),"f014dd41dafebc33f09e87be866074afd7a2443c5bb452103a435585353a828f","EqRender body unchanged");}
 {const start=app.indexOf("const Level = (() => {");assert.ok(start>=0,"Level");const body=app.slice(start,start+3892);assert.equal(createHash('sha256').update(body).digest('hex'),"e48ad7797384ac31bb8b864662fc2a546b04470b981042f016874ba750957226","Level body unchanged");}
 });
 test('eager shell and Settings definitions load before app state and defer reading it',()=>{
 const html=readFileSync(join(__dirname,'index.html'),'utf8');
 for(const file of ['shell-core.js','views-core.js','section-rail.js']) {
-  assert.ok(html.indexOf('src="'+file+'"')<html.indexOf('src="app.js"'));
+  assert.ok(html.indexOf('src="'+file+'"')<=html.indexOf('src="section-rail.js"'));
-  const vm=require('node:vm');const context=vm.createContext({window:{},document:{}});
+  const vm=require('node:vm');const doc={readyState:'complete',addEventListener(){},createElement:()=>({}),head:{append(){}}};const globals={document:doc,Lazy:{manifest:{appCache:false},url:()=>'/app.js'},console};globals.window=globals;const context=vm.createContext(globals);
  // Evaluation before any data/$/els/Player declaration must be safe.
  vm.runInContext(readFileSync(join(__dirname,file),'utf8'),context);
 }
--- a/frontend/app.js
+++ b/frontend/app.js
@@ -60,12 +60,14 @@ async function call(zeroName, tauriName, payload = {}) {
 // Generic fetch wrapper — returns parsed JSON or throws with a human message.
 async function webFetch(path, opts = {}) {
  if ((opts.method || 'GET').toUpperCase() === 'GET' && window.AsyncGuard?.getJson)
    return AsyncGuard.getJson(path, opts, {
      // Some upstream failures are represented by HTTP 200 + {ok:false}; do
      // not expose those transient responses as a manual Retry state either.
      retryResult: value => value?.ok === false && /\b(?:408|425|429|5\d\d)\b|temporar|timed?\s*out|network|connection|upstream|unavailable|available right now/i.test(String(value.error || value.message || '')),
    });
  const res = await fetch(path, opts);
-  if (!res.ok) {
+  if (!res.ok) throw new Error(`HTTP ${res.status}`);
    let msg = `HTTP ${res.status}`;
    try { const j = await res.json(); msg = j.error || msg; } catch { /* non-JSON */ }
    throw new Error(msg);
  }
  return res.json();
 }
@@ -573,7 +575,7 @@ const API = {
    ? webFetch(`/api/search?q=${encodeURIComponent(query)}${refresh ? '&refresh=1' : ''}`)
    : call('yt.search', 'yt_search', { query }),
  related: (meta, { refresh = false } = {}) => WEB && /^[\w-]{11}$/.test(meta.id)
-    ? fetch(`/api/related?${new URLSearchParams({ videoId: meta.id, title: meta.title || '', channel: meta.channel || meta.artist || '', ...(refresh ? { refresh: '1' } : {}) })}`).then(response => response.json())
+    ? webFetch(`/api/related?${new URLSearchParams({ videoId: meta.id, title: meta.title || '', channel: meta.channel || meta.artist || '', ...(refresh ? { refresh: '1' } : {}) })}`)
    : API.search(meta.title || meta.channel, { refresh }),
  // Videos the server already knows — answers fast while the real search loads.
  searchLocal: (query) => WEB
@@ -663,6 +665,7 @@ const DEFAULT_SETTINGS = {
  fontScale: 'normal',      // 'small' | 'normal' | 'large' | 'xl'
  levelVolume: null,        // loudness levelling; null = on (on iPhone: applied to saved songs' rendered copies)
  liveAudioIOS: false,      // iPhone: live Web Audio EQ/levelling for streamed songs (stops when the screen locks)
  jamesDsp: { enabled: false, downloadForOffline: false, preset: 'flat', params: {}, irRef: null },
  parallelSaves: 4,         // offline saves running at once (Settings → Offline cache)
  density: 'comfortable',   // 'comfortable' | 'compact'
  perfMode: false,          // disable heavy visual effects for speed
@@ -672,7 +675,24 @@ const DEFAULT_SETTINGS = {
  autoBackupIntervalDays: 7,
  serviceVideo: false,      // show the video panel inside service mode (lyric videos)
 };
-let data = { playlists: [], history: [], queue: [], customVideos: [], pinnedPlaylists: [], settings: { ...DEFAULT_SETTINGS }, resumePositions: {}, rememberPos: {}, playCount: {}, abMarkers: {}, bookmarks: {}, lyricOffsets: {}, stats: null, lastAutoBackup: 0, profile: null };
+function normalizeJamesDspSettings(settings) {
  const saved = settings?.jamesDsp && typeof settings.jamesDsp === 'object' ? settings.jamesDsp : {};
  const params = saved.params && typeof saved.params === 'object' && !Array.isArray(saved.params) ? { ...saved.params } : {};
  // Impulse-response PCM is intentionally session-only; do not re-enable the
  // convolver on a later boot without its uploaded audio buffer.
  const irRef = saved.irRef && typeof saved.irRef.name === 'string' && typeof saved.irRef.hash === 'string'
    ? { name: saved.irRef.name, hash: saved.irRef.hash } : null;
  if (!irRef) delete params['convolver.enabled'];
  settings.jamesDsp = {
    enabled: saved.enabled === true,
    downloadForOffline: saved.downloadForOffline === true,
    preset: typeof saved.preset === 'string' ? saved.preset : 'flat',
    params,
    irRef,
  };
  return settings;
 }
 let data = { playlists: [], history: [], queue: [], customVideos: [], pinnedPlaylists: [], settings: normalizeJamesDspSettings({ ...DEFAULT_SETTINGS }), resumePositions: {}, rememberPos: {}, playCount: {}, abMarkers: {}, bookmarks: {}, lyricOffsets: {}, stats: null, lastAutoBackup: 0, profile: null };
 let view = { type: 'search' };          // 'search'|'history'|'playlist'|'settings'|'queue'|'saved'|'downloads'|'channel'
 let searchResults = [];
 // Distinguishes "never searched" (hide the list pane, show the landing) from
@@ -695,6 +715,8 @@ const IS_IOS = /iPad|iPhone|iPod/.test(navigator.userAgent) || (navigator.platfo
 let _currentEqUrl = null;
 async function useEqRender(id) {
  if (_currentEqUrl) { URL.revokeObjectURL(_currentEqUrl); _currentEqUrl = null; }
  // JamesDSP is a live insert: never layer it over the Standard renderer copy.
  if (data.settings?.jamesDsp?.enabled) return null;
  if (typeof EqRender === 'undefined' || !WEB) return null;
  try { _currentEqUrl = await EqRender.urlFor(id); } catch { _currentEqUrl = null; }
  return _currentEqUrl;
@@ -905,7 +927,7 @@ function applyProfileData(name, payload, updatedAt) {
  if (payload.bookmarks && typeof payload.bookmarks === 'object') data.bookmarks = payload.bookmarks;
  if (payload.lyricOffsets && typeof payload.lyricOffsets === 'object') data.lyricOffsets = payload.lyricOffsets;
  if (payload.stats && typeof payload.stats === 'object') data.stats = payload.stats;
-  if (payload.settings && typeof payload.settings === 'object') data.settings = { ...DEFAULT_SETTINGS, ...payload.settings };
+  if (payload.settings && typeof payload.settings === 'object') data.settings = normalizeJamesDspSettings({ ...DEFAULT_SETTINGS, ...payload.settings });
  data.profile = { name, syncedAt: updatedAt || 0, protected: !!payload.__protected, kind: payload.__kind || null };
  API.saveData(data).catch(() => {});
 }
@@ -1241,7 +1263,7 @@ async function adoptSharedPlaylistByCode(code, { fromName = '' } = {}) {
        Add “<strong>${escapeHtml(shared.name)}</strong>” (${count} video${count === 1 ? '' : 's'}) to your playlists?
        This playlist is added alongside your existing playlists and nothing is replaced.
      </p>`;
-    showModal(fromName ? '🎵 Playlist sent to you' : '⬇ Add shared playlist', body, [
+    showModal(fromName ? '🎵 Playlist sent to you' : 'Add shared playlist', body, [
      { label: fromName ? 'No thanks' : 'Cancel', onClick: () => { closeModal(); resolve(false); } },
      { label: 'Add playlist', primary: true, onClick: () => { closeModal(); resolve(true); } },
    ]);
@@ -1361,7 +1383,7 @@ async function adoptProfileFromUrl() {
          Loading it replaces the playlists, history and settings on this device,
          and future changes here sync to that profile.
        </p>`;
-      showModal('⬇ Open shared profile', body, [
+      showModal('Open shared profile', body, [
        { label: 'Cancel', onClick: () => { closeModal(); resolve(false); } },
        { label: 'Load profile', primary: true, onClick: () => { closeModal(); resolve(true); } },
      ]);
@@ -1567,7 +1589,7 @@ function loadProfileFlow() {
      changes here sync back to that profile.
    </p>
    <input id="profileNameInput" type="text" placeholder="profile name" autocomplete="off" />`;
-  showModal('⬇ Load online profile', body, [
+  showModal('Load online profile', body, [
    { label: 'Cancel', onClick: closeModal },
    { label: 'Load', primary: true, onClick: async () => {
      const name = ($('profileNameInput').value || '').trim();
@@ -1598,8 +1620,8 @@ function escapeHtml(s) {
    .replace(/"/g, '&quot;').replace(/'/g, '&#39;');
 }
-const ICON_PLAY = '<svg viewBox="0 0 24 24" aria-hidden="true" class="fill"><path d="M9 5.5v13l10-6.5z"/></svg>';
+const ICON_PLAY = TransportIcons.svg('play');
-const ICON_PAUSE = '<svg viewBox="0 0 24 24" aria-hidden="true" class="fill"><path d="M7 5h3.5v14H7zM13.5 5H17v14h-3.5z"/></svg>';
+const ICON_PAUSE = TransportIcons.svg('pause');
 // Speaker icon follows the volume (muted / low / high); the level before a mute
 // is remembered so un-muting returns to it.
 let lastVolume = 1;
@@ -2209,7 +2231,7 @@ async function openVideoEditor(source) {
    {
      label: 'Save edited copy', primary: true, onClick: () => {
        if (!VideoEdit.hasEdits(cuts, duration)) {
-          showErr('Add at least one cut, or use ⬇ Save for the full video.');
+          showErr('Add at least one cut, or use Save for the full video.');
          return;
        }
        const keep = VideoEdit.invertCuts(cuts, duration);
@@ -3088,14 +3110,10 @@ function wirePlayerEvents() {
 function updatePlayBtn() {
  Remote.changed();
-  els.playBtn.innerHTML = Player.master.paused ? ICON_PLAY : ICON_PAUSE;
+  const kind = Player.master.paused ? 'play' : 'pause';
-  const sp = $('stgPlay');
+  for (const id of ['playBtn','stgPlay','miniPlayBtn','servicePlayBtn']) TransportIcons.set($(id), kind);
  if (sp) sp.innerHTML = Player.master.paused ? ICON_PLAY : ICON_PAUSE;
  const stage = document.querySelector('.player-stage');
  if (stage) stage.classList.toggle('is-paused', !!Player.master.paused);
  $('miniPlayBtn').textContent = Player.master.paused ? '▶' : '⏸';
  const spBtn = $('servicePlayBtn');
  if (spBtn) spBtn.textContent = Player.master.paused ? '▶' : '⏸';
 }
 // "⚠ Broken": ask the server to drop its cached copy and fetch a fresh one.
 // Playback switches to live YouTube streams meanwhile (resuming where it
@@ -3245,7 +3263,7 @@ function openMoreControls() {
    ['eqBtn', '🎚', 'Equalizer', false],
    ['pipBtn', '⧉', 'Picture-in-picture', false],
  ];
-  const selects = [['speedSelect', '⏩', 'Speed'], ['qualitySelect', '🎞', 'Quality']];
+  const selects = [['speedSelect', TransportIcons.svg('forward'), 'Speed'], ['qualitySelect', '🎞', 'Quality']];
  const list = document.createElement('div');
  list.className = 'more-list';
  const draw = () => {
@@ -3256,7 +3274,7 @@ function openMoreControls() {
      const row = document.createElement('label');
      row.className = 'more-row';
      row.innerHTML = '<span class="more-ico"></span><span class="more-txt"><b></b></span>';
-      row.querySelector('.more-ico').textContent = icon;
+      row.querySelector('.more-ico').innerHTML = icon;
      row.querySelector('b').textContent = title;
      const sel = document.createElement('select');
      sel.className = 'more-sel';
@@ -3274,7 +3292,7 @@ function openMoreControls() {
      row.type = 'button';
      row.className = 'more-row' + (on ? ' on' : '');
      row.innerHTML = '<span class="more-ico"></span><span class="more-txt"><b></b><small></small></span><span class="more-go">' + (on ? '●' : '›') + '</span>';
-      row.querySelector('.more-ico').textContent = icon;
+      row.querySelector('.more-ico').innerHTML = icon;
      row.querySelector('b').textContent = title;
      row.querySelector('small').textContent = String(src.title || '').replace(/\s*\[[A-Za-z]\]\s*$/, '');
      row.onclick = () => {
@@ -3301,13 +3319,13 @@ function openAddChoice() {
    r.type = 'button';
    r.className = 'more-row';
    r.innerHTML = '<span class="more-ico"></span><span class="more-txt"><b></b><small></small></span><span class="more-go">›</span>';
-    r.querySelector('.more-ico').textContent = icon;
+    r.querySelector('.more-ico').innerHTML = icon;
    r.querySelector('b').textContent = title;
    r.querySelector('small').textContent = sub;
    r.onclick = () => { closeModal(); setTimeout(fn, 0); };
    list.appendChild(r);
  };
-  row('▶', 'Add to queue', 'Play it next in this session', () => addToQueue(video));
+  row(TransportIcons.svg('play'), 'Add to queue', 'Play it next in this session', () => addToQueue(video));
  row('☰', 'Add to playlist', 'Save it to one of your playlists', () => openCardMenu(video));
  showModal('Add “' + (video.title || 'video').slice(0, 40) + '”', list, [{ label: 'Cancel', onClick: closeModal }]);
 }
@@ -3332,12 +3350,26 @@ function openMoreActions() {
    row.className = 'more-row' + (danger ? ' danger' : '');
    row.disabled = !!src.disabled;
    row.innerHTML = '<span class="more-ico"></span><span class="more-txt"><b></b><small></small></span><span class="more-go">›</span>';
-    row.querySelector('.more-ico').textContent = icon;
+    row.querySelector('.more-ico').innerHTML = icon;
    row.querySelector('b').textContent = title;
    row.querySelector('small').textContent = sub;
    row.onclick = () => { closeModal(); setTimeout(() => src.click(), 0); };
    list.appendChild(row);
  }
  if (data.settings?.jamesDsp?.enabled && EQ.state().jamesDsp?.active) {
    const row = document.createElement('button');
    row.type = 'button'; row.className = 'more-row';
    const bypassed = !!EQ.state().jamesDsp?.bypassed;
    row.innerHTML = '<span class="more-ico" aria-hidden="true">A/B</span><span class="more-txt"><b></b><small>Temporarily compare with the unprocessed signal</small></span><span class="more-go">›</span>';
    row.querySelector('b').textContent = bypassed ? 'Resume JamesDSP' : 'Bypass JamesDSP';
    row.setAttribute('aria-label', row.querySelector('b').textContent);
    row.onclick = async () => {
      closeModal();
      const next = await EQ.toggleDspBypass();
      toast(next ? 'JamesDSP bypassed' : 'JamesDSP active');
    };
    list.appendChild(row);
  }
  if (!list.children.length) { toast('No more actions for this video'); return; }
  showModal('More actions', list, [{ label: 'Close', onClick: closeModal }]);
 }
@@ -3559,7 +3591,7 @@ const Notes = (() => {
          <div class="notes-empty-actions">
            <button class="np-btn" type="button" data-act="web">🌐 Find lyrics online</button>
            <button class="np-btn" type="button" data-act="paste">✎ Add lyrics</button>
-            ${isUploadId(st.videoId) ? '' : '<button class="np-btn" type="button" data-act="captions">⤓ Import YouTube captions</button>'}
+            ${isUploadId(st.videoId) ? '' : `<button class="np-btn" type="button" data-act="captions">${MediaIcons.svg('download')} Import YouTube captions</button>`}
          </div>
          <div class="notes-empty-hint">Lyrics and chapters are shared with everyone who plays this song.</div>
        </div>`;
@@ -3633,7 +3665,7 @@ const Notes = (() => {
          <div class="mk-title">${m.kind === 'note' ? '📝 ' : ''}${escapeHtml(m.title)}</div>
          ${m.note ? `<div class="mk-note${m.kind === 'note' ? ' long' : ''}">${escapeHtml(m.note)}</div>` : ''}
        </div>
-        <button class="mk-btn" type="button" data-act="jump" title="Play from here">▶</button>
+        <button class="mk-btn" type="button" data-act="jump" title="Play from here">${TransportIcons.svg('play')}</button>
        ${m.auto ? '' : `<button class="mk-btn" type="button" data-act="edit" title="Edit">✎</button>
        <button class="mk-btn" type="button" data-act="del" title="Delete">🗑</button>`}
      </div>`;
@@ -3801,7 +3833,7 @@ const Notes = (() => {
      ${note ? `<p class="lyr-editor-note">${escapeHtml(note)}</p>` : ''}
      <textarea class="lyr-editor-text" spellcheck="false" placeholder="Paste or type the lyrics…"></textarea>
      <div class="lyr-editor-tools">
-        <button type="button" class="np-btn" data-act="captions">⤓ Import YouTube captions</button>
+        <button type="button" class="np-btn" data-act="captions">${MediaIcons.svg('download')} Import YouTube captions</button>
        <button type="button" class="np-btn" data-act="break">↵ Line break (same time)</button>
        <button type="button" class="np-btn" data-act="stamp">⏱ Stamp current time on this line</button>
      </div>`;
@@ -4181,7 +4213,7 @@ const Notes = (() => {
    const refresh = () => { ta.value = build(inc.checked); };
    inc.addEventListener('change', refresh);
    refresh();
-    showModal('⤓ Export chapters', body, [
+    showModal('Export chapters', body, [
      { label: 'Download .txt', onClick: () => {
        const blob = new Blob([`${title}\nhttps://youtu.be/${st.videoId}\n\n${ta.value}\n`], { type: 'text/plain' });
        const a = document.createElement('a');
@@ -5338,7 +5370,7 @@ const Level = (() => {
 // so it keeps going when locked. One render at a time, in the background.
 const EqRender = (() => {
  const DIR = 'eq-renders', KEY = 'ytpEqRenders', RATE = 32000, MAX_SECONDS = 12 * 60;
-  const active = () => EQ.isIOS() && WEB && !!window.OPFS && window.OPFS.isSupported() && typeof OfflineAudioContext !== 'undefined';
+  const active = () => EQ.isIOS() && WEB && !data.settings?.jamesDsp?.enabled && !!window.OPFS && window.OPFS.isSupported() && typeof OfflineAudioContext !== 'undefined';
  const readMap = () => { try { return JSON.parse(localStorage.getItem(KEY) || '{}'); } catch { return {}; } };
  const writeMap = (m) => { try { localStorage.setItem(KEY, JSON.stringify(m)); } catch { /* blocked */ } };
  const queue = new Set();
@@ -5508,10 +5540,13 @@ const PiP = (() => {
 const loadSoundFeatures=()=>Promise.all([Lazy.load('feature:eq-core'),Lazy.load('feature:vocal-reducer')]);
 const EQ_BANDS = EqParameters.bands;
 const EQ_PRESETS = EqParameters.presets;
 const JamesDSPFeature = Lazy.proxy('feature:jamesdsp', ['createController'], 'JamesDSPFeature');
 const JamesDSPTools = Lazy.proxy('feature:jamesdsp', ['generateIR', 'decodeIR', 'prepareIR', 'saveIR', 'getIR', 'listIRs', 'deleteIR'], 'JamesDSPFeature');
 const EQ = (() => {
  const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) || (navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1);
  const AC = window.AudioContext || window.webkitAudioContext;
-  const st = { ctx: null, filters: null, sources: new Map() };
+  const st = { ctx: null, filters: null, levelDb: 0 };
  let dspController = null, dspControllerPromise = null, dspRequest = 0;
  // Web Audio is off on iOS (it silences playback when the screen locks)
  // unless the user opted in through "Level volume" (Settings → Playback).
  // Live Web Audio is off on iOS (it silences playback when the screen locks)
@@ -5526,6 +5561,49 @@ const EQ = (() => {
  };
  const isFlat = () => gains().every((v) => v === 0);
  async function prepareDspGraph() {
    if (!available()) throw new Error(isIOS ? 'Turn on Live sound processing in Settings → Playback first.' : 'Web Audio is unavailable.');
    if (rendered()) throw new Error('This song is already playing a Standard processed copy. JamesDSP will start with the next original track.');
    if (!st.ctx && !AudioGraph.snapshot().contextCreated) {
      const context = AudioGraph.context({ sampleRate: 48000 });
      if (context.state === 'suspended') context.resume().catch(() => {});
    }
    await loadSoundFeatures();
    if (!st.ctx && !build()) throw new Error('The Standard fallback audio chain is not ready.');
    if (!st.ctx || !st.filters?.[0]) throw new Error('The Standard fallback audio chain could not be built.');
    attach(els.video);
    attach(els.audio);
    return { context: st.ctx, elements: [els.video, els.audio].filter(Boolean), standardInput: st.filters[0] };
  }
  function dspFailed(error) {
    if (!data.settings.jamesDsp?.enabled) return;
    data.settings.jamesDsp.enabled = false;
    if ($('setSoundEngine')) $('setSoundEngine').value = 'standard';
    if ($('jamesDspControls')) $('jamesDspControls').hidden = true;
    persist();
    toast(`JamesDSP unavailable; Standard sound is active. ${error?.message || ''}`.trim());
    apply();
    Level.apply();
  }
  async function getDspController() {
    if (dspController) return dspController;
    if (!dspControllerPromise) dspControllerPromise = Lazy.load('feature:jamesdsp').then(async () => {
      dspController = await JamesDSPFeature.createController({ graph: AudioGraph, prepareGraph: prepareDspGraph, onError: dspFailed });
      return dspController;
    }).catch(error => { dspControllerPromise = null; throw error; });
    return dspControllerPromise;
  }
  function startDsp() {
    const request = ++dspRequest;
    getDspController().then(controller => {
      if (request !== dspRequest || !data.settings.jamesDsp?.enabled) return controller.disable();
      return controller.enable(data.settings.jamesDsp, st.levelDb);
    }).catch(dspFailed);
  }
  function build() {
    if (st.ctx) return true;
    if (!Lazy.loaded('feature:eq-core') || !Lazy.loaded('feature:vocal-reducer')) {
@@ -5533,7 +5611,7 @@ const EQ = (() => {
      return false;
    }
    try {
-      st.ctx = new AC();
+      st.ctx = AudioGraph.context();
      st.filters = EQ_BANDS.map((b) => {
        const f = st.ctx.createBiquadFilter();
        f.type = b.type;
@@ -5558,16 +5636,24 @@ const EQ = (() => {
  }
  function attach(el) {
-    if (!el || st.sources.has(el)) return;
+    if (!el) return;
    try {
-      const src = st.ctx.createMediaElementSource(el);
+      AudioGraph.connect(el, st.filters[0]);
      src.connect(st.filters[0]);
      st.sources.set(el, src);
    } catch { /* already connected elsewhere */ }
  }
  // Apply the stored curve; wires the graph up the first time it's non-flat.
  function apply() {
    if (data.settings.jamesDsp?.enabled) {
      if (!available()) { dspFailed(new Error(isIOS ? 'Live sound processing is off on this iPhone.' : 'Web Audio is unavailable.')); return; }
      if (rendered()) { dspFailed(new Error('The current song already uses a Standard processed copy.')); return; }
      startDsp();
      renderButton();
      return;
    }
    dspRequest++;
    if (dspController) dspController.disable().catch(() => {});
    else if (dspControllerPromise) dspControllerPromise.then(controller => controller.disable()).catch(() => {});
    if (!available()) return;
    if (!st.ctx && isFlat() && EqParameters.amount(data.settings.vocalLevel ?? 100) === 100 && EqParameters.width(data.settings.stereoWidth) === 0) return;
    if (!build()) return;
@@ -5647,6 +5733,7 @@ const EQ = (() => {
  // one-way step the EQ takes, so it is only offered where the EQ is (never
  // on iOS, where Web Audio would silence background playback).
  function analyser() {
    if (dspController?.active && !dspController.state().bypassed) return dspController.analyser();
    if (!available() || !build()) return null;
    attach(els.video);
    attach(els.audio);
@@ -5662,8 +5749,13 @@ const EQ = (() => {
  // Set the levelling gain (dB). 0 dB never wires the graph on its own.
  function setLevel(db) {
    if (!available()) return false;
    if (rendered()) db = 0;
    st.levelDb = Number(db) || 0;
    if (data.settings.jamesDsp?.enabled) {
      if (dspController?.desired) dspController.setLevelDb(st.levelDb).catch(dspFailed);
      return true;
    }
    if (!available()) return false;
    if (!st.ctx && Math.abs(db) < 0.3) return true;
    if (!build()) return false;
    attach(els.video);
@@ -5674,8 +5766,56 @@ const EQ = (() => {
    return true;
  }
  async function toggleDspBypass() {
    if (!dspController?.active) return false;
    try { return await dspController.toggleBypass(); }
    catch (error) { dspFailed(error); return false; }
  }
  function dspLowEndDevice() {
    const cores=Number(navigator.hardwareConcurrency), memory=Number(navigator.deviceMemory);
    return (cores>0&&cores<=4)||(memory>0&&memory<=4);
  }
  async function loadDspIRBuffer(buffer, reference=null) {
    if (!data.settings.jamesDsp?.enabled || !dspController?.active) throw new Error('Turn on JamesDSP before importing an impulse response.');
    await dspController.loadIR(buffer,reference);
    data.settings.jamesDsp.irRef=reference;
    data.settings.jamesDsp.params['convolver.enabled']=1;
    persist();
    return reference;
  }
  async function loadDspIR(file) {
    if (!data.settings.jamesDsp?.enabled || !dspController?.active) throw new Error('Turn on JamesDSP before importing an impulse response.');
    const context=st.ctx;if(!context?.decodeAudioData)throw new Error('Audio decoding is unavailable on this device.');
    const buffer=await context.decodeAudioData(await file.arrayBuffer());
    const prepared=await JamesDSPTools.prepareIR(context,buffer,dspLowEndDevice()?24000:65536);
    const name=String(file.name||'Uploaded IR').replace(/\.[^.]+$/,'').slice(0,100)||'Uploaded IR';
    let reference=null;try{reference=await JamesDSPTools.saveIR(name,prepared,{kind:'uploaded'});}catch(error){toast(`Impulse response stays on this device for this session: ${error.message}`);}
    return loadDspIRBuffer(prepared,reference);
  }
  async function loadDspBuiltinIR(name) {
    if(!data.settings.jamesDsp?.enabled||!dspController?.active)throw new Error('Turn on JamesDSP before loading an impulse response.');
    const context=st.ctx;if(!context)throw new Error('Audio context is unavailable.');
    const lowEnd=dspLowEndDevice();if(lowEnd&&name!=='Small room')throw new Error('Long impulse responses are disabled on this lower-power device.');
    const buffer=await JamesDSPTools.generateIR(name,context.sampleRate,2,lowEnd?24000:65536);
    let reference=null;try{reference=await JamesDSPTools.saveIR(name,buffer,{kind:'generated'});}catch(error){toast(`Generated response stays in this session: ${error.message}`);}
    return loadDspIRBuffer(buffer,reference);
  }
  async function loadDspSavedIR(name) {
    const stored=await JamesDSPTools.getIR(name);if(!stored)throw new Error(`Stored impulse response not found: ${name}`);
    return loadDspIRBuffer(stored.buffer,{name:stored.name,hash:stored.hash});
  }
  async function listDspIRs() {
    return JamesDSPTools.listIRs();
  }
  return { open, apply, renderButton, available, analyser, setLevel, gains, bands: EQ_BANDS, isIOS: () => isIOS, state: () => ({ wired: !!st.ctx, ctx: st.ctx && st.ctx.state, gains: st.filters ? st.filters.map((f) => f.gain.value) : null,
-    levelDb: st.level ? Math.round(200 * Math.log10(Math.max(1e-6, st.level.gain.value))) / 10 : null }) };
+    levelDb: st.level ? Math.round(200 * Math.log10(Math.max(1e-6, st.level.gain.value))) / 10 : null, jamesDsp: dspController?.state() || null }), toggleDspBypass, loadDspIR, loadDspIRBuffer, loadDspBuiltinIR, loadDspSavedIR, listDspIRs };
 })();
 // ============================================================================
@@ -5725,7 +5865,7 @@ const Gestures = (() => {
      if (x < 1 / 3) seekBy(-10, 'left');
      else if (x > 2 / 3) seekBy(10, 'right');
      else if (st.zoom > 1.001) { reset(); showHud('<div class="gh-label">Zoom reset</div>'); }
-      else if (current) { Player.toggle(); updatePlayBtn(); showHud(`<div class="gh-seek">${Player.master.paused ? '⏸' : '▶'}</div>`); }
+      else if (current) { Player.toggle(); updatePlayBtn(); showHud(`<div class="gh-seek">${TransportIcons.svg(Player.master.paused ? 'pause' : 'play')}</div>`); }
      return;
    }
    st.lastTap = now;
@@ -6285,7 +6425,7 @@ function updateServiceMode() {
  const spBtn = $('servicePlayBtn');
  if (spBtn && Player.master) {
-    spBtn.textContent = Player.master.paused ? '▶' : '⏸';
+    TransportIcons.set(spBtn, Player.master.paused ? 'play' : 'pause');
  }
  updateWakeStateUI();
@@ -6920,7 +7060,7 @@ function openImportYouTubeModal() {
        </p>
      `;
-      showModal('⬇ Import from YouTube', successBody, [
+      showModal('Import from YouTube', successBody, [
        { label: 'Cancel', onClick: closeModal },
        {
          label: 'Create playlist',
@@ -6959,7 +7099,7 @@ function openImportYouTubeModal() {
    }
  }
-  showModal('⬇ Import from YouTube', body, [
+  showModal('Import from YouTube', body, [
    { label: 'Cancel', onClick: closeModal },
    { label: 'Import', primary: true, onClick: handleImport },
  ]);
@@ -6984,14 +7124,14 @@ function openCardMenu(video) {
  // Quick: add to queue
  const queueBtn = document.createElement('button');
-  queueBtn.textContent = '▶ Add to queue';
+  queueBtn.innerHTML = TransportIcons.svg('play') + ' Add to queue';
  queueBtn.onclick = () => { addToQueue(video); closeModal(); };
  body.appendChild(queueBtn);
  const isCustom = !!video.custom;
  const exportBtn = document.createElement('button');
-  exportBtn.textContent = '🖼 Save to gallery';
+  exportBtn.innerHTML = MediaIcons.svg('download') + ' Save to gallery';
  exportBtn.title = 'Put the video file in your gallery, Files app or Downloads folder';
  exportBtn.onclick = () => { closeModal(); exportToDevice(video); };
  body.appendChild(exportBtn);
@@ -7005,7 +7145,7 @@ function openCardMenu(video) {
    saveBtn.className = 'danger';
    saveBtn.onclick = () => { closeModal(); deleteCustomVideo(video.id); };
  } else {
-    saveBtn.textContent = isSaved ? '✓ Saved offline — remove' : '⬇ Save for offline';
+    saveBtn.innerHTML = MediaIcons.svg(isSaved ? 'offline' : 'download') + (isSaved ? ' Saved offline — remove' : ' Save for offline');
    saveBtn.onclick = async () => {
      closeModal();
      if (cachedIds.has(video.id)) {
@@ -7232,17 +7372,17 @@ function updatePlaylistOfflineButton(btn, pl) {
  let label;
  btn.classList.remove('done', 'busy');
  if (stats.total > 0 && stats.cached === stats.total) {
-    if (iconOnly) { setListIcon(btn, 'offlineDone'); btn.classList.add('done'); } else btn.textContent = '✓ Available offline';
+    if (iconOnly) { setListIcon(btn, 'offlineDone'); btn.classList.add('done'); } else btn.innerHTML = MediaIcons.svg('offline') + ' Available offline';
    btn.disabled = true;
    btn.classList.add('disabled');
    label = 'All videos in this playlist are available offline';
  } else if (isDownloading) {
-    if (iconOnly) { btn.innerHTML = `<span class="lib-progress">${stats.cached}/${stats.total}</span>`; btn.classList.add('busy'); } else btn.textContent = `Saving ${stats.cached}/${stats.total}…`;
+    if (iconOnly) { btn.innerHTML = MediaIcons.svg('progress') + `<span class="lib-progress">${stats.cached}/${stats.total}</span>`; btn.classList.add('busy'); } else btn.innerHTML = MediaIcons.svg('progress') + ` Saving ${stats.cached}/${stats.total}…`;
    btn.disabled = true;
    btn.classList.add('disabled');
    label = `${stats.cached} of ${stats.total} videos saved offline`;
  } else {
-    if (iconOnly) setListIcon(btn, 'offline'); else btn.textContent = '⬇ Make available offline';
+    if (iconOnly) setListIcon(btn, 'offline'); else btn.innerHTML = MediaIcons.svg('download') + ' Make available offline';
    btn.disabled = stats.total === 0;
    btn.classList.toggle('disabled', stats.total === 0);
    label = stats.total === 0 ? 'Playlist is empty' : 'Make available offline';
@@ -7259,7 +7399,7 @@ async function makePlaylistOffline(pl) {
  const btn = $('plOfflineBtn');
  if (btn) {
    const stats = playlistOfflineStats(pl);
-    btn.innerHTML = `<span class="lib-progress">${stats.cached}/${stats.total}</span>`;
+    btn.innerHTML = MediaIcons.svg('progress') + `<span class="lib-progress">${stats.cached}/${stats.total}</span>`;
    btn.classList.add('busy');
    btn.disabled = true;
    btn.classList.add('disabled');
@@ -8528,9 +8668,7 @@ const RUNNING_BUILD = (() => {
 let _knownBuildTag = null;
 async function fetchServerBuild() {
-  const res = await fetch('/api/version', { cache: 'no-store' });
+  const data = await webFetch('/api/version', { cache: 'no-store' });
  if (!res.ok) return null;
  const data = await res.json();
  return data.buildTag || null;
 }
@@ -8690,11 +8828,11 @@ async function applyUpdate(target, { quiet = false } = {}) {
      // When the waiting worker already downloaded this build in the
      // background, the toast says so and nothing is re-downloaded.
      askStatus: (worker) => SU.askCacheStatus(worker, { timeoutMs: 4000, setTimeout: (fn, ms) => setTimeout(fn, ms) }),
-      onPhase: (phase) => {
+      onPhase: (phase, status) => {
        if (quiet) return;
        if (_updateToast) _updateToast.remove();
        _updateToast = phase === 'ready'
-          ? toast('Applying the update…', { duration: 20000 })
+          ? toast(status?.offlineReady === false ? `Applying the update… Offline cache is still preparing (${status.cached}/${status.total}).` : 'Applying the update…', { duration: 20000 })
          : toast('Downloading the update…', { duration: 305000 });
      },
      refreshShell: ('caches' in window) ? () => SU.refreshShellInPlace({
@@ -8758,6 +8896,8 @@ async function registerServiceWorker() {
    const reg = await navigator.serviceWorker.register('/sw.js', { updateViaCache: 'none' });
    _swReg = reg;
    Lazy.reportLayout(reg);
    reportDspOfflineOptIn(reg);
    navigator.serviceWorker.ready.then(readyReg => reportDspOfflineOptIn(readyReg)).catch(() => {});
    // A waiting worker only means "update pending" when this page is already
    // controlled by a previous SW. On a FIRST install (fresh visit, or right
@@ -8793,6 +8933,14 @@ async function registerServiceWorker() {
  }
 }
 function reportDspOfflineOptIn(reg = _swReg) {
  if (!WEB || !navigator.serviceWorker) return;
  const dsp = data.settings?.jamesDsp;
  const values = dsp?.enabled || dsp?.downloadForOffline ? ['jamesDsp'] : [];
  const workers = new Set([navigator.serviceWorker.controller, reg?.installing, reg?.active, reg?.waiting]);
  for (const worker of workers) worker?.postMessage({ type: 'OFFLINE_OPT_INS', values });
 }
 // /?q=<query> — a shareable search link (same family as Share's /?v=&t=).
 // Runs after wireUI() so the search form's submit handler exists; the param
 // is stripped immediately so a reload doesn't re-run the search.
@@ -8972,7 +9120,7 @@ async function boot() {
        lyricOffsets: loaded.lyricOffsets || {},
        stats: loaded.stats || null,
        lastAutoBackup: loaded.lastAutoBackup || 0,
-        settings: { ...DEFAULT_SETTINGS, ...(loaded.settings || {}) },
+        settings: normalizeJamesDspSettings({ ...DEFAULT_SETTINGS, ...(loaded.settings || {}) }),
        profile: loaded.profile || null,
      };
    }
--- a/frontend/asset-sync-core.js
+++ b/frontend/asset-sync-core.js
@@ -3,10 +3,20 @@
  'use strict';
  const CACHE = 'ytplayer-assets';
  const STATE = '/__ytp_asset_state';
  const OPT_INS = '/__ytp_offline_opt_ins';
  const url = (path, file) => path + '?v=' + file.h;
  function paths(manifest) {
-    return [...new Set(Object.values(manifest.groups).flatMap(group => group.files))].sort();
+    return Object.keys(manifest.files).sort();
  }
  function offlinePaths(manifest, optIns = []) {
    const allowed = new Set(optIns || []), optional = new Map();
    for (const group of Object.values(manifest.groups || {})) {
      if (!group.offlineOptIn || allowed.has(group.offlineOptIn)) continue;
      for (const path of group.files || []) optional.set(path, true);
    }
    return paths(manifest).filter(path => !optional.has(path));
  }
  function blocking(manifest, previous, activeLayout) {
@@ -41,6 +51,9 @@
    const group = Object.keys(manifest.groups).find(name => manifest.groups[name].files.includes(path));
    if (!group || !previous.groups[group]?.files.includes(path) ||
        manifest.groups[group].contract !== previous.groups[group].contract) return null;
    // A stale core must understand every group contract in the new shell.
    if (path === "/app.js" && Object.entries(manifest.groups).some(([name, entry]) =>
        previous.groups[name]?.contract !== entry.contract)) return null;
    return url(path, previous.files[path]);
  }
@@ -49,30 +62,65 @@
    return response ? response.json() : null;
  }
-  async function status(manifest, cache, { previous, activeLayout } = {}) {
+  function verifiedProbe(response, hash) {
-    const found = await Promise.all(blocking(manifest, previous, activeLayout).map(async path => {
+    if (!response) return false;
-      const response = await cache.match(url(path, manifest.files[path]));
+    const valid = response.headers.get('X-Asset-Hash') === hash;
-      return !!response && response.headers.get('X-Asset-Hash') === manifest.files[path].h;
+    // Metadata checks must release Blob/data-pipe readers. They never consume
-    }));
+    // asset bytes, and cancelling this response does not remove its cache entry.
-    const missing = found.filter(value => !value).length;
+    response.body?.cancel().catch(() => {});
-    return { ready: missing === 0, missing, version: manifest.buildTag };
+    return valid;
  }
-  async function syncAssets(manifest, { cache, fetchFn, concurrency = 6, attempts = 3, activeLayout, groups }) {
+  async function readOptIns(cache) {
    try { return (await (await cache.match(OPT_INS))?.json()) || []; } catch { return []; }
  }
  async function status(manifest, cache, { previous, activeLayout, offline = true, optIns } = {}) {
    const found = await Promise.all(blocking(manifest, previous, activeLayout).map(async path => {
      const response = await cache.match(url(path, manifest.files[path]));
      return verifiedProbe(response, manifest.files[path].h);
    }));
    const missing = found.filter(value => !value).length;
    return { ready: missing === 0, missing, version: manifest.buildTag, ...(offline ? await completeness(manifest, cache, { optIns }) : {}) };
  }
  // All concurrent messages/layout jobs in this worker share six download slots.
  let downloads = 0;
  const waiters = [];
  async function downloadSlot(task) {
    if (downloads >= 6) await new Promise(resolve => waiters.push(resolve));
    else downloads++;
    try { return await task(); }
    finally { const next = waiters.shift(); if (next) next(); else downloads--; }
  }
  const pendingDownloads = new Map();
  async function sharedDownload(key, task) {
    while (pendingDownloads.has(key)) await pendingDownloads.get(key).catch(() => {});
    const promise = downloadSlot(task);
    pendingDownloads.set(key, promise);
    try { return await promise; }
    finally { pendingDownloads.delete(key); }
  }
  async function syncAssets(manifest, { cache, fetchFn, concurrency = 6, attempts = 3, activeLayout, groups, all = false, optIns } = {}) {
    const previous = (await state(cache))?.current;
    const missing = [];
-    const selected = groups ? [...new Set(groups.flatMap(name => manifest.groups[name]?.files || []))].sort()
+    const selected = all ? offlinePaths(manifest, optIns || await readOptIns(cache)) : groups ? [...new Set(groups.flatMap(name => manifest.groups[name]?.files || []))].sort()
      : blocking(manifest, previous, activeLayout);
    for (const path of selected) {
      const key = url(path, manifest.files[path]);
      const response = await cache.match(key);
-      if (!response || response.headers.get('X-Asset-Hash') !== manifest.files[path].h) missing.push(key);
+      if (!verifiedProbe(response, manifest.files[path].h)) missing.push(key);
    }
    const count = missing.length;
    let failure;
    await Promise.all(Array.from({ length: Math.max(1, Math.min(6, concurrency, count)) }, async () => {
-      while (missing.length && !failure) {
+      while (missing.length) {
        const key = missing.shift();
        try { await sharedDownload(key, async () => {
        const held = await cache.match(key);
        if (verifiedProbe(held, key.split('v=')[1])) return;
        let error;
        for (let attempt = 0; attempt < Math.min(3, attempts); attempt++) {
          const controller = new AbortController();
@@ -89,17 +137,63 @@
          } catch (err) { error = err; }
          finally { clearTimeout(timer); }
        }
-        if (error) failure = error;
+        if (error) throw error;
        }); } catch (error) { failure = error; }
      }
    }));
    if (failure) throw failure;
-    if (!groups && !(await status(manifest, cache, { previous, activeLayout })).ready) throw new Error('Incomplete blocking assets');
+    if (!groups && !all && !(await status(manifest, cache, { previous, activeLayout, offline: false })).ready) throw new Error('Incomplete blocking assets');
    return { refreshed: count, caches: 1 };
  }
  // Verified cache entries are the durable progress journal. Counters are rebuilt
  // after worker termination or browser eviction; never trust a stored ready bit.
  async function completeness(manifest, cache, { optIns } = {}) {
    const files = offlinePaths(manifest, optIns || await readOptIns(cache));
    const missingFiles = (await Promise.all(files.map(async path => {
      const response = await cache.match(url(path, manifest.files[path]));
      return verifiedProbe(response, manifest.files[path].h) ? null : path;
    }))).filter(Boolean);
    const total = files.length;
    return { offlineReady: missingFiles.length === 0, cached: total - missingFiles.length, total, missingFiles };
  }
  const completionKey = manifest => '/__ytp_completion/' + manifest.buildTag;
  async function complete(manifest, { cache, fetchFn, cycles = 4, now = Date.now, optIns,
    sleep = ms => new Promise(resolve => setTimeout(resolve, ms)), baseDelay = 1000,
    maxDelay = 30000, notify = () => {}, force = false, concurrency = 1 } = {}) {
    const key = completionKey(manifest), saved = await cache.match(key);
    let job = saved ? await saved.json() : { failures: 0, nextRetryAt: 0 };
    const selectedOptIns = optIns || await readOptIns(cache);
    let snapshot = await completeness(manifest, cache, { optIns: selectedOptIns });
    const publish = async running => {
      job = { ...job, ...snapshot, running, version: manifest.buildTag };
      await cache.put(key, Response.json(job));
      await notify(job);
    };
    if (snapshot.offlineReady) { job.failures = 0; job.nextRetryAt = 0; await publish(false); return job; }
    if (!force && job.nextRetryAt > now()) await sleep(Math.min(maxDelay, job.nextRetryAt - now()));
    for (let cycle = 0; cycle < cycles; cycle++) {
      await publish(true);
      let error;
      try { await syncAssets(manifest, { cache, fetchFn, all: true, optIns: selectedOptIns, concurrency }); }
      catch (failure) { error = failure; }
      snapshot = await completeness(manifest, cache, { optIns: selectedOptIns });
      if (snapshot.offlineReady) { job.failures = 0; job.nextRetryAt = 0; job.error = null; await publish(false); return job; }
      job.failures++;
      const delay = Math.min(maxDelay, baseDelay * 2 ** Math.min(job.failures - 1, 10));
      job.nextRetryAt = now() + delay;
      job.error = String(error?.message || 'Incomplete offline cache');
      await publish(cycle + 1 < cycles);
      if (cycle + 1 < cycles) await sleep(delay);
    }
    return job;
  }
  async function commit(manifest, cache, { previousClients, activeLayout } = {}) {
    const old = await state(cache);
-    if (!(await status(manifest, cache, { previous: old?.current, activeLayout })).ready) {
+    if (!(await status(manifest, cache, { previous: old?.current, activeLayout, offline: false })).ready) {
      throw new Error('Incomplete blocking assets');
    }
    const sameBuild = old?.current?.buildTag === manifest.buildTag;
@@ -119,7 +213,7 @@
    return next;
  }
-  const api = { CACHE, STATE, url, paths, blocking, plan, retained, fallback, status, syncAssets, state, commit };
+  const api = { CACHE, STATE, OPT_INS, url, paths, offlinePaths, blocking, plan, retained, fallback, status, completeness, completionKey, complete, syncAssets, readOptIns, state, commit };
  if (typeof module !== 'undefined' && module.exports) module.exports = api;
  else root.AssetSyncCore = api;
 })(typeof globalThis !== 'undefined' ? globalThis : this);
--- a/frontend/asset-sync-core.test.js
+++ b/frontend/asset-sync-core.test.js
@@ -45,3 +45,81 @@ test('removing group membership retains the old tab URL even if the physical fil
 const previous=manifest(),current=manifest();current.groups.core.files=['/index.html'];
 assert.ok(core.retained(current,previous).has('/a.js?v=a'));
 });
 test('completion includes ungrouped runtime files and exposes verified missing paths', async () => {
 const c=cache(), m=manifest();m.files['/worker.js']={h:'w'};
 await core.syncAssets(m,{cache:c,fetchFn:async u=>response(u.split('=')[1])});
 const status=await core.status(m,c);
 assert.equal(status.ready,true);assert.equal(status.offlineReady,false);
 assert.deepEqual(status.missingFiles,['/worker.js']);assert.equal(status.cached,2);assert.equal(status.total,3);
 await core.complete(m,{cache:c,fetchFn:async u=>response(u.split('=')[1])});
 assert.equal((await core.status(m,c)).offlineReady,true);
 });
 test('offline completion skips opt-in DSP assets until the user enables offline audio effects', async () => {
 const c=cache(),m=manifest();m.files['/vendor/jamesdsp/dsp/jamesdsp.wasm']={h:'wasm'};
 m.groups.jamesdsp={contract:1,eager:false,background:true,offlineOptIn:'jamesDsp',files:['/vendor/jamesdsp/dsp/jamesdsp.wasm']};
 const calls=[];
 const defaultJob=await core.complete(m,{cache:c,fetchFn:async u=>{calls.push(u);return response(u.split('=')[1])}});
 assert.deepEqual(calls.sort(),['/a.js?v=a','/index.html?v=b']);
 assert.equal(defaultJob.total,2);assert.equal(defaultJob.offlineReady,true);
 calls.length=0;
 await c.put(core.OPT_INS,Response.json(['jamesDsp']));
 const optedJob=await core.complete(m,{cache:c,fetchFn:async u=>{calls.push(u);return response(u.split('=')[1])}});
 assert.deepEqual(calls,['/vendor/jamesdsp/dsp/jamesdsp.wasm?v=wasm']);
 assert.equal(optedJob.total,3);assert.equal(optedJob.offlineReady,true);
 });
 test('completion persists backoff and resumes only missing files after a worker restart',async()=>{
 const c=cache(),m=manifest();let clock=1000;const calls=[];
 await core.complete(m,{cache:c,cycles:1,now:()=>clock,baseDelay:10,fetchFn:async u=>{if(u.includes('index'))throw Error('offline');return response('a');}});
 const checkpoint=await(await c.match(core.completionKey(m))).json();
 assert.equal(checkpoint.running,false);assert.equal(checkpoint.failures,1);assert.equal(checkpoint.nextRetryAt,1010);
 await core.complete(m,{cache:c,now:()=>clock,sleep:async ms=>{assert.equal(ms,10);clock+=ms;},fetchFn:async u=>{calls.push(u);return response(u.split('=')[1]);}});
 assert.deepEqual(calls,['/index.html?v=b']);
 const status=await(await c.match(core.completionKey(m))).json();assert.equal(status.offlineReady,true);assert.equal(status.failures,0);
 await c.delete('/a.js?v=a');assert.equal((await core.status(m,c)).offlineReady,false);
 });
 test('completion retries with exponential backoff and keeps making progress past a failed asset',async()=>{
 const c=cache(),m=manifest(),delays=[];let tries=0;
 const job=await core.complete(m,{cache:c,baseDelay:5,sleep:async ms=>delays.push(ms),fetchFn:async u=>{if(u.includes('a.js')&&++tries<=6)throw Error('drop');return response(u.split('=')[1]);}});
 assert.deepEqual(delays,[5,10]);assert.equal(job.offlineReady,true);assert.ok(await c.match('/index.html?v=b'));
 });
 test('overlapping layout and completion jobs share a six-download ceiling',async()=>{
 const c=cache(),m=manifest();m.groups.extra={background:true,files:[]};
 for(let i=0;i<15;i++){const p='/extra'+i+'.js';m.files[p]={h:String(i)};m.groups.extra.files.push(p);}
 let active=0,peak=0;const calls=new Map();
 const fetchFn=async u=>{active++;peak=Math.max(active,peak);calls.set(u,(calls.get(u)||0)+1);await new Promise(r=>setTimeout(r,3));active--;return response(u.split('=')[1]);};
 await Promise.all([core.complete(m,{cache:c,fetchFn}),core.syncAssets(m,{cache:c,fetchFn,groups:['extra']})]);
 assert.ok(peak<=6);assert.ok([...calls.values()].every(count=>count===1));
 });
 test('offline completion keeps its own network concurrency to one',async()=>{
 const c=cache(),m=manifest();let active=0,peak=0;
 for(let i=0;i<12;i++){const p='/complete'+i+'.js';m.files[p]={h:String(i)};}
 const fetchFn=async u=>{active++;peak=Math.max(peak,active);await new Promise(r=>setTimeout(r,2));active--;return response(u.split('=')[1]);};
 await core.complete(m,{cache:c,fetchFn});assert.equal(peak,1);
 });
 test('blocking commit never waits on an optional file readiness probe',{timeout:1000},async()=>{
 const c=cache(),m=manifest();m.files['/extra.js']={h:'extra'};m.groups.extra={files:['/extra.js'],background:true,contract:1};
 await c.put('/a.js?v=a',response('a'));await c.put('/index.html?v=b',response('b'));
 const match=c.match;let extraProbes=0;c.match=async key=>{if(key==='/extra.js?v=extra'){extraProbes++;return new Promise(()=>{});}return match(key);};
 await core.commit(m,c);assert.equal(extraProbes,0);assert.equal((await core.state(c)).current.buildTag,m.buildTag);
 c.match=match;assert.equal((await core.status(m,c)).offlineReady,false);
 });
 test('metadata probes release response streams while stored asset bodies remain readable',async()=>{
 const c=cache(),m=manifest();await c.put('/a.js?v=a',response('a'));await c.put('/index.html?v=b',response('b'));
 const match=c.match,probes=[];c.match=async key=>{const r=await match(key);if(r)probes.push(r);return r;};
 assert.equal((await core.status(m,c)).offlineReady,true);assert.ok(probes.length>0);assert.ok(probes.every(r=>r.bodyUsed));
 assert.equal(await(await match('/a.js?v=a')).text(),'a');assert.equal(await(await match('/index.html?v=b')).text(),'b');
 });
 test('stale app core requires every feature contract to match the new shell',()=>{
 const old={files:{'/app.js':{h:'old'}},groups:{core:{contract:1,files:['/app.js']},extra:{contract:1,files:[]}}};
 const next=structuredClone(old);next.files['/app.js'].h='new';next.groups.extra.contract=2;
 assert.equal(core.fallback(next,old,'/app.js'),null);next.groups.extra.contract=1;assert.equal(core.fallback(next,old,'/app.js'),'/app.js?v=old');
 });
--- a/frontend/asset-worker.test.js
+++ b/frontend/asset-worker.test.js
@@ -1,25 +1,26 @@
 const {test}=require('node:test');const assert=require('node:assert/strict');const vm=require('node:vm');const fs=require('node:fs');const core=require('./asset-sync-core');
 function environment(){
- const stores=new Map(),listeners={},messages=[],skips=[],fetches=[];const m={buildTag:'next',files:{'/index.html':{h:'index'},'/app.js':{h:'app'}},groups:{core:{files:['/index.html','/app.js']}}};
+ const stores=new Map(),listeners={},messages=[],skips=[],fetches=[],selfMessages=[];const m={buildTag:'next',files:{'/index.html':{h:'index'},'/app.js':{h:'app'}},groups:{core:{files:['/index.html','/app.js']}}};
 const storage={async keys(){return [...stores.keys()]},async delete(n){return stores.delete(n)},async open(n){if(!stores.has(n)){const map=new Map();stores.set(n,{async match(k){return map.get(typeof k==='string'?k:new URL(k.url).pathname+new URL(k.url).search)?.clone()},async put(k,r){map.set(k,r.clone())},async keys(){return [...map.keys()].map(k=>({url:'https://local'+k}))},async delete(k){return map.delete(typeof k==='string'?k:new URL(k.url).pathname+new URL(k.url).search)}})}return stores.get(n)}};
- const sandbox={__BUILD_TAG__:'next',__ASSET_SYNC__:true,AssetSyncCore:core,importScripts:()=>{},caches:storage,URL,Response,Request,Headers,setTimeout,clearTimeout,crypto:require('node:crypto').webcrypto,console,fetch:async u=>{fetches.push(u);return u==='/api/manifest'?Response.json(m):new Response(u,{headers:{'X-Asset-Hash':m.files[u.split('?')[0]]?.h || ''}})},self:{location:{origin:'https://local'},addEventListener:(t,f)=>listeners[t]=f,skipWaiting:()=>skips.push(1),clients:{claim:async()=>{},matchAll:async()=>[{id:'old',postMessage:x=>messages.push(x)}]}}};
+ const sandbox={__BUILD_TAG__:'next',__ASSET_SYNC__:true,AssetSyncCore:core,importScripts:()=>{},caches:storage,URL,Response,Request,Headers,setTimeout,clearTimeout,crypto:require('node:crypto').webcrypto,console,fetch:async u=>{fetches.push(u);return u==='/api/manifest'?Response.json(m):new Response(u,{headers:{'X-Asset-Hash':m.files[u.split('?')[0]]?.h || ''}})},self:{registration:{active:{postMessage:data=>selfMessages.push(data)}},location:{origin:'https://local'},addEventListener:(t,f)=>listeners[t]=f,skipWaiting:()=>skips.push(1),clients:{claim:async()=>{},matchAll:async()=>[{id:'old',postMessage:x=>messages.push(x)}]}}};
 vm.runInNewContext(fs.readFileSync(__dirname+'/sw.js','utf8'),sandbox);
- async function dispatch(t,e={}){let p;listeners[t]({...e,waitUntil:v=>p=v});await p}
+ async function dispatch(t,e={}){const tasks=[];listeners[t]({...e,waitUntil:v=>tasks.push(v)});await Promise.all(tasks)}
- async function request(url,mode='cors',clientId='new'){let p;listeners.fetch({request:{url:'https://local'+url,method:'GET',mode},clientId,respondWith:v=>p=v});return p}
+ async function request(url,mode='cors',clientId='new'){let p;const tasks=[];listeners.fetch({request:{url:'https://local'+url,method:'GET',mode},clientId,waitUntil:v=>tasks.push(v),respondWith:v=>p=v});const response=await p;await Promise.all(tasks);return response;}
- return {storage,m,skips,fetches,dispatch,request};
+ return {storage,m,skips,fetches,dispatch,request,sandbox,selfMessages,async complete(){for(const data of selfMessages.splice(0))await dispatch('message',{data});}};
 }
-test('install does not activate or publish; CACHE_STATUS is honest; activation commits and exact requests self-heal',async()=>{const e=environment();await e.dispatch('install');assert.equal(e.skips.length,0);const cache=await e.storage.open(core.CACHE);assert.equal(await core.state(cache),null);let reply;await e.dispatch('message',{data:{type:'CACHE_STATUS'},ports:[{postMessage:r=>reply=r}]});assert.equal(reply.ready,true);await e.dispatch('activate');assert.equal((await core.state(cache)).current.buildTag,'next');assert.equal((await e.request('/playlist/x','navigate')).headers.get('X-Asset-Hash'),'index');await cache.delete('/app.js?v=app');await e.dispatch('message',{data:{type:'CACHE_STATUS'},ports:[{postMessage:r=>reply=r}]});assert.equal(reply.ready,false);assert.equal(reply.missing,1);assert.equal(reply.version,'next');assert.equal((await e.request('/app.js')).headers.get('X-Asset-Hash'),'app');assert.ok(await cache.match('/app.js?v=app'));assert.equal(await cache.match('/app.js?v=stale'),undefined);assert.equal((await e.request('/app.js?v=stale')).status,409);});
+test('install does not activate or publish; CACHE_STATUS is honest; activation commits and exact requests self-heal',async()=>{const e=environment();await e.dispatch('install');assert.equal(e.skips.length,0);const cache=await e.storage.open(core.CACHE);assert.equal(await core.state(cache),null);let reply;await e.dispatch('message',{data:{type:'CACHE_STATUS'},ports:[{postMessage:r=>reply=r}]});assert.equal(reply.ready,true);await e.dispatch('activate');await e.complete();assert.equal((await core.state(cache)).current.buildTag,'next');assert.equal((await e.request('/playlist/x','navigate')).headers.get('X-Asset-Hash'),'index');await cache.delete('/app.js?v=app');assert.equal((await core.status(e.m,cache)).ready,false);await e.dispatch('message',{data:{type:'CACHE_STATUS'},ports:[{postMessage:r=>reply=r}]});assert.equal((await core.status(e.m,cache)).offlineReady,true);assert.equal(reply.version,'next');assert.equal((await e.request('/app.js')).headers.get('X-Asset-Hash'),'app');assert.ok(await cache.match('/app.js?v=app'));assert.equal(await cache.match('/app.js?v=stale'),undefined);assert.equal((await e.request('/app.js?v=stale')).status,409);});
 test('reported playback defers explicit activation until pause; install never calls skipWaiting',async()=>{const e=environment(),source={id:'p'};await e.dispatch('message',{data:{type:'SKIP_WAITING'}});assert.equal(e.skips.length,0);await e.dispatch('message',{source,data:{type:'PLAYING',value:true}});await e.dispatch('message',{source,data:{type:'SKIP_WAITING'}});assert.equal(e.skips.length,0);await e.dispatch('message',{source,data:{type:'PLAYING',value:false}});assert.equal(e.skips.length,1);});
 test('staged same-contract responses use verified N-1 without poisoning the new URL',async()=>{
 const e=environment(); const cache=await e.storage.open(core.CACHE);
 const old={buildTag:'old',files:{'/extra.js':{h:'old'}},groups:{core:{files:[],contract:1},'feature:extra':{files:['/extra.js'],contract:1,background:true}}};
 e.m.groups.core.contract=1; e.m.groups['feature:extra']={files:['/extra.js'],contract:1,background:true}; e.m.files['/extra.js']={h:'new'};
- await cache.put(core.STATE,Response.json({current:old})); await cache.put('/extra.js?v=old',new Response('old body',{headers:{'X-Asset-Hash':'old'}}));
+ await cache.put(core.STATE,Response.json({current:old})); await cache.put('/extra.js?v=old',new Response('old body',{headers:{'X-Asset-Hash':'old','Cache-Control':'public, max-age=31536000, immutable','Content-Encoding':'gzip','Content-Length':'9'}}));
- await e.dispatch('install'); await e.dispatch('activate');
+ await e.dispatch('install'); await e.dispatch('activate');await e.complete();
 assert.ok(await cache.match('/extra.js?v=new'));await cache.delete('/extra.js?v=new');
 assert.equal(await cache.match('/extra.js?v=new'),undefined);
- const stale=await e.request('/extra.js?v=new'); assert.equal(await stale.text(),'old body');assert.equal(stale.headers.get('X-Asset-Hash'),'old');assert.equal(await cache.match('/extra.js?v=new'),undefined);
+ const stale=await e.request('/extra.js?v=new'); assert.equal(await stale.text(),'old body');assert.equal(stale.headers.get('X-Asset-Hash'),'old');assert.equal(stale.headers.get('Cache-Control'),'no-store');assert.equal(stale.headers.get('Content-Encoding'),null);assert.equal(stale.headers.get('Content-Length'),null);assert.equal(await cache.match('/extra.js?v=new'),undefined);
- await e.dispatch('message',{data:{type:'WARM_ASSETS',saveData:true}}); assert.equal(await cache.match('/extra.js?v=new'),undefined);
+ await e.dispatch('message',{data:{type:'WARM_ASSETS',saveData:true}}); assert.ok(await cache.match('/extra.js?v=new'));
 await e.dispatch('message',{data:{type:'WARM_ASSETS',saveData:false}}); assert.equal((await cache.match('/extra.js?v=new')).headers.get('X-Asset-Hash'),'new');
 assert.equal((await e.request('/extra.js?v=new')).headers.get('X-Asset-Hash'),'new');
 });
@@ -32,13 +33,70 @@ test('a changed background contract is downloaded before ready and cannot fall b
 await e.dispatch('install');assert.equal((await core.state(cache)).current.buildTag,'old');
 assert.equal((await cache.match('/extra.js?v=new')).headers.get('X-Asset-Hash'),'new');
 let reply;await e.dispatch('message',{data:{type:'CACHE_STATUS'},ports:[{postMessage:r=>reply=r}]});assert.equal(reply.ready,true);
- await e.dispatch('activate');await cache.delete('/extra.js?v=new');
+ await e.dispatch('activate');await e.complete();await cache.delete('/extra.js?v=new');
 const response=await e.request('/extra.js?v=new');assert.equal(response.headers.get('X-Asset-Hash'),'new');assert.notEqual(await response.text(),'old body');
 });
 test('overlapping idle warm messages share one download pool',async()=>{
 const e=environment();e.m.files['/extra.js']={h:'extra'};e.m.groups['feature:extra']={files:['/extra.js'],contract:1,background:true};
- await e.dispatch('install');await e.dispatch('activate');
+ await e.dispatch('install');await e.dispatch('activate');await e.complete();
 await Promise.all([e.dispatch('message',{data:{type:'WARM_ASSETS',saveData:false}}),e.dispatch('message',{data:{type:'WARM_ASSETS',saveData:false}})]);
 assert.equal(e.fetches.filter(url=>url==='/extra.js?v=extra').length,1);
 });
 test('waiting status does not start completion and activation delegates it to its own event',async()=>{
 const e=environment();e.m.files['/extra.js']={h:'extra'};e.m.groups['feature:extra']={files:['/extra.js'],contract:1,background:true};
 await e.dispatch('install');let reply;await e.dispatch('message',{data:{type:'CACHE_STATUS'},ports:[{postMessage:r=>reply=r}]});
 assert.equal(reply.ready,true);assert.equal(reply.offlineReady,false);assert.ok(!e.fetches.includes('/extra.js?v=extra'));
 let release,started;const gate=new Promise(r=>release=r),begin=new Promise(r=>started=r),fetch=e.sandbox.fetch;
 e.sandbox.fetch=async url=>{if(url==='/extra.js?v=extra'){started();await gate;}return fetch(url);};
 await e.dispatch('activate');const cache=await e.storage.open(core.CACHE);
 assert.equal((await core.state(cache)).current.buildTag,'next');assert.equal((await core.status(e.m,cache)).ready,true);
 assert.equal((await core.status(e.m,cache)).offlineReady,false);assert.equal(e.selfMessages[0].type,'COMPLETE_ASSETS');
 const job=e.complete();await begin;assert.equal(await cache.match('/extra.js?v=extra'),undefined);release();await job;
 assert.equal((await core.status(e.m,cache)).offlineReady,true);
 });
 test('legacy shell verification is staged during install so Refresh UI activation does no hashing',async()=>{
 const e=environment(),legacy=await e.storage.open('ytplayer-production-old');let digests=0;
 await legacy.put('/app.js',new Response('legacy app bytes'));
 const subtle=e.sandbox.crypto.subtle;
 e.sandbox.crypto={subtle:{digest:async(...args)=>{digests++;return subtle.digest(...args);}}};
 await e.dispatch('install');
 const stagedDigests=digests,cache=await e.storage.open(core.CACHE),candidate=await(await cache.match('/__ytp_candidate/next')).json();
 assert.ok(stagedDigests>0,'install verified old cached bytes before offering Refresh UI');
 assert.deepEqual(candidate.legacyCacheNames,['ytplayer-production-old']);
 assert.ok((await core.state(cache)).current.legacyURLs['/app.js']);
 await e.dispatch('activate');
 assert.equal(digests,stagedDigests,'the user-triggered activation does not hash the old shell again');
 assert.equal((await e.storage.keys()).includes('ytplayer-production-old'),false,'old shell is deleted only after commit');
 });
 test('offline opt-in is persisted and adds only declared optional groups to completion',async()=>{
 const e=environment();e.m.files['/large.wasm']={h:'wasm'};e.m.groups.dsp={files:['/large.wasm'],contract:1,background:true,offlineOptIn:'jamesDsp'};
 await e.dispatch('install');await e.dispatch('activate');await e.complete();
 const cache=await e.storage.open(core.CACHE);assert.equal(await cache.match('/large.wasm?v=wasm'),undefined);
 await e.dispatch('message',{data:{type:'OFFLINE_OPT_INS',values:['jamesDsp','not-a-valid-opt-in']}});
 assert.deepEqual(await core.readOptIns(cache),['jamesDsp']);
 assert.equal((await cache.match('/large.wasm?v=wasm')).headers.get('X-Asset-Hash'),'wasm');
 const status=await core.status(e.m,cache);assert.equal(status.offlineReady,true);assert.equal(status.total,3);
 });
 test('page-captured app is reused on first install without a worker download',async()=>{
 const e=environment(),cache=await e.storage.open(core.CACHE);
 await cache.put('/app.js?v=app',new Response('page captured app',{headers:{'X-Asset-Hash':'app'}}));
 await e.dispatch('install');assert.equal(e.fetches.includes('/app.js?v=app'),false);
 assert.equal(await(await cache.match('/app.js?v=app')).text(),'page captured app');
 assert.equal(e.skips.length,0);assert.equal(await core.state(cache),null);
 });
 test('worker never supplies stale app to a native script when a feature contract changed',async()=>{
 const e=environment(),cache=await e.storage.open(core.CACHE);
 const old={buildTag:'old',files:{'/app.js':{h:'old'}},groups:{core:{contract:1,files:['/app.js']},extra:{contract:1,files:[]}}};
 e.m.groups.core.contract=1;e.m.groups.extra={contract:2,background:true,files:[]};
 await cache.put(core.STATE,Response.json({current:old}));await cache.put('/app.js?v=old',new Response('old app',{headers:{'X-Asset-Hash':'old'}}));
 await e.dispatch('install');await e.dispatch('activate');await cache.delete('/app.js?v=app');
 e.sandbox.fetch=async()=>{throw Error('offline')};
 const response=await e.request('/app.js?v=app');assert.equal(response.status,503);assert.equal(await response.text(),'Offline');
 });
--- a/frontend/assets.json
+++ b/frontend/assets.json
@@ -1,7 +1,7 @@
 {
  "groups": {
    "core": {
-      "contract": 1,
+      "contract": 2,
      "eager": true,
      "files": [
        "/index.html",
@@ -29,6 +29,7 @@
        "/related-videos.js",
        "/related-videos.css",
        "/audio-continuity.js",
        "/audio-graph.js",
        "/fullscreen-orientation.js",
        "/fullscreen-orientation.css",
        "/download-actions.js",
@@ -359,6 +360,27 @@
      "dependencies": [
        "feature:stats"
      ]
    },
    "feature:jamesdsp": {
      "contract": 1,
      "eager": false,
      "background": true,
      "offlineOptIn": "jamesDsp",
      "files": [
        "/vendor/jamesdsp/jamesdsp-feature.js",
        "/vendor/jamesdsp/jamesdsp-node.mjs",
        "/vendor/jamesdsp/params.mjs",
        "/vendor/jamesdsp/ir-utils.mjs",
        "/vendor/jamesdsp/ir-builtins.mjs",
        "/vendor/jamesdsp/ir-store.mjs",
        "/vendor/jamesdsp/worklet.mjs",
        "/vendor/jamesdsp/dsp/jamesdsp-a982b53.mjs",
        "/vendor/jamesdsp/dsp/jamesdsp.wasm"
      ],
      "dependencies": [
        "feature:eq-core",
        "feature:vocal-reducer"
      ]
    }
  }
 }
--- a/frontend/async-guard.js
+++ b/frontend/async-guard.js
@@ -35,7 +35,68 @@
    }
  }
-  const AsyncGuard = { runExclusive };
+  const wait = ms => new Promise(resolve => setTimeout(resolve, ms));
  async function retry(task, { attempts = 3, delay = attempt => attempt === 1 ? 350 : 1000,
    shouldRetry = () => true, sleep = wait } = {}) {
    let last;
    for (let attempt = 1; attempt <= Math.max(1, attempts); attempt++) {
      try { return await task(attempt); }
      catch (error) {
        last = error;
        if (attempt >= attempts || !shouldRetry(error, attempt)) throw error;
        await sleep(delay(attempt));
      }
    }
    throw last;
  }
  // Retry only idempotent GETs. Keep the timeout active through JSON parsing so
  // a stalled response body is treated like a stalled connection.
  async function getJson(url, options = {}, config = {}) {
    const fetchFn = config.fetch || root.fetch?.bind(root);
    if (!fetchFn) throw new Error('fetch is unavailable');
    if ((options.method || 'GET').toUpperCase() !== 'GET') throw new Error('Retry helper only accepts GET');
    const attempts = config.attempts ?? 3, timeoutMs = config.timeoutMs ?? 20000;
    return retry(async () => {
      const controller = typeof AbortController === 'function' ? new AbortController() : null;
      let timedOut = false, timer, externalAbort;
      const external = options.signal;
      if (controller && external) {
        if (external.aborted) throw external.reason || new DOMException('Aborted', 'AbortError');
        externalAbort = () => controller.abort(external.reason);
        external.addEventListener('abort', externalAbort, { once: true });
      }
      if (controller && timeoutMs > 0) timer = setTimeout(() => { timedOut = true; controller.abort(); }, timeoutMs);
      try {
        const response = await fetchFn(url, { ...options, ...(controller ? { signal: controller.signal } : {}) });
        if ([408, 425, 429].includes(response.status) || response.status >= 500) {
          const error = new Error(`HTTP ${response.status}`); error.retryable = true; throw error;
        }
        if (!response.ok) {
          let message = `HTTP ${response.status}`;
          try { message = (await response.json()).error || message; } catch {}
          const error = new Error(message); error.retryable = false; throw error;
        }
        const value = await response.json();
        if (config.retryResult?.(value)) {
          const error = new Error(value.error || value.message || 'Temporary API failure');
          error.retryable = true;
          throw error;
        }
        return value;
      } catch (error) {
        if (external?.aborted) throw error;
        if (timedOut) { const timeout = new Error('Request timed out'); timeout.retryable = true; throw timeout; }
        if (error.retryable === undefined) error.retryable = true;
        throw error;
      } finally {
        if (timer) clearTimeout(timer);
        if (external && externalAbort) external.removeEventListener('abort', externalAbort);
      }
    }, { attempts, shouldRetry: error => error.retryable !== false, sleep: config.sleep || wait });
  }
  const AsyncGuard = { runExclusive, retry, getJson };
  if (typeof module !== 'undefined' && module.exports) {
    module.exports = AsyncGuard;
--- a/frontend/async-guard.test.js
+++ b/frontend/async-guard.test.js
@@ -60,6 +60,55 @@ test('frees the key after failure so a retry is possible', async () => {
  assert.strictEqual(out, 'ok');
 });
 test('bounded GET retries recover transient network and server failures', async () => {
  const { getJson } = require('./async-guard');
  let calls = 0;
  const result = await getJson('/api/search', {}, { sleep: async () => {}, fetch: async () => {
    calls++;
    if (calls === 1) throw new TypeError('connection reset');
    if (calls === 2) return new Response('{}', { status: 503 });
    return Response.json({ ok: true, results: [] });
  } });
  assert.equal(result.ok, true);
  assert.equal(calls, 3);
 });
 test('GET retry stops at the bound and does not retry permanent HTTP errors', async () => {
  const { getJson } = require('./async-guard');
  let calls = 0;
  await assert.rejects(getJson('/api/search', {}, { sleep: async () => {}, fetch: async () => {
    calls++; return new Response('{}', { status: 404 });
  } }), /HTTP 404/);
  assert.equal(calls, 1);
  await assert.rejects(getJson('/api/search', {}, { attempts: 2, sleep: async () => {}, fetch: async () => {
    calls++; throw new TypeError('offline');
  } }), /offline/);
  assert.equal(calls, 3);
 });
 test('retryable API error payloads recover but permanent application errors do not retry', async () => {
  const { getJson } = require('./async-guard'); let calls = 0;
  const retryResult = value => value?.ok === false && /temporarily unavailable/i.test(value.error || '');
  const result = await getJson('/api/streams', {}, { retryResult, sleep: async () => {}, fetch: async () => {
    calls++;
    return Response.json(calls === 1 ? { ok: false, error: 'temporarily unavailable' } : { ok: true, data: [] });
  } });
  assert.equal(result.ok, true); assert.equal(calls, 2);
  calls = 0;
  const absent = await getJson('/api/streams', {}, { retryResult, sleep: async () => {}, fetch: async () => { calls++; return Response.json({ ok: false, error: 'video not found' }); } });
  assert.equal(absent.ok, false); assert.equal(calls, 1);
 });
 test('timed out GET bodies retry within the configured bound', async () => {
  const { getJson } = require('./async-guard'); let calls = 0;
  const result = await getJson('/api/related', {}, { attempts: 2, timeoutMs: 5, sleep: async () => {}, fetch: async (_url, { signal }) => {
    calls++;
    if (calls === 1) return new Promise((resolve, reject) => signal.addEventListener('abort', () => reject(new DOMException('aborted', 'AbortError')), { once: true }));
    return Response.json({ ok: true });
  } });
  assert.equal(result.ok, true); assert.equal(calls, 2);
 });
 test('supports a synchronous fn', async () => {
  const set = new Set();
  const out = await runExclusive(set, 's', () => 7);
--- a/frontend/audio-graph.js
+++ b/frontend/audio-graph.js
@@ -0,0 +1,69 @@
 /* One lifetime owner for the player's realtime AudioContext and media sources. */
 (function (root) {
  'use strict';
  function create(options = {}) {
    const getConstructor = options.getConstructor || (() => root.AudioContext || root.webkitAudioContext);
    let context = null;
    const sources = new Map();
    const routes = new Map();
    const failed = new Map();
    function getContext(contextOptions) {
      if (context) return context;
      const Constructor = getConstructor();
      if (typeof Constructor !== 'function') throw new Error('Web Audio is unavailable');
      context = contextOptions === undefined ? new Constructor() : new Constructor(contextOptions);
      return context;
    }
    function source(element) {
      if (!element) throw new TypeError('A media element is required');
      if (sources.has(element)) return sources.get(element);
      if (failed.has(element)) throw failed.get(element);
      try {
        const created = getContext().createMediaElementSource(element);
        sources.set(element, created);
        return created;
      } catch (error) {
        // MediaElementSource cannot be undone. Remember failure so a later
        // route change can never attempt a second source for this element.
        failed.set(element, error);
        throw error;
      }
    }
    function connect(element, destination) {
      const mediaSource = source(element);
      if (!destination) throw new TypeError('An audio destination is required');
      if (routes.get(element) === destination) return mediaSource;
      if (routes.has(element)) mediaSource.disconnect();
      mediaSource.connect(destination);
      routes.set(element, destination);
      return mediaSource;
    }
    function routeAll(elements, destination) {
      for (const element of elements || []) connect(element, destination);
    }
    function snapshot() {
      return {
        contextCreated: !!context,
        sampleRate: context?.sampleRate || null,
        sourceCount: sources.size,
        failedCount: failed.size,
        routedCount: routes.size,
      };
    }
    return { context: getContext, source, connect, routeAll, snapshot };
  }
  const singleton = create();
  const api = { create, context: (...args) => singleton.context(...args), source: (...args) => singleton.source(...args),
    connect: (...args) => singleton.connect(...args), routeAll: (...args) => singleton.routeAll(...args),
    snapshot: () => singleton.snapshot() };
  if (typeof module !== 'undefined' && module.exports) module.exports = api;
  else root.AudioGraph = api;
 })(typeof window !== 'undefined' ? window : globalThis);
--- a/frontend/audio-graph.test.js
+++ b/frontend/audio-graph.test.js
@@ -0,0 +1,75 @@
 const { test } = require('node:test');
 const assert = require('node:assert/strict');
 const { readFileSync } = require('node:fs');
 const { join } = require('node:path');
 const AudioGraph = require('./audio-graph');
 test('AudioGraph creates its context only on demand and retains the first context options', () => {
  let contexts = 0, optionsSeen;
  class Context {
    constructor(options) { contexts++; optionsSeen = options; this.sampleRate = options?.sampleRate || 44100; }
  }
  const graph = AudioGraph.create({ getConstructor: () => Context });
  assert.equal(graph.snapshot().contextCreated, false);
  const first = graph.context({ sampleRate: 48000 });
  assert.equal(graph.context({ sampleRate: 44100 }), first);
  assert.equal(contexts, 1);
  assert.deepEqual(optionsSeen, { sampleRate: 48000 });
  assert.equal(first.sampleRate, 48000);
 });
 test('one retained MediaElementSource per element can change insert routes without recreation', () => {
  const made = [], connects = [], disconnects = [];
  class Context {
    constructor() { this.sampleRate = 48000; }
    createMediaElementSource(element) {
      const source = { element, connect: target => connects.push([element.id, target.id]), disconnect: () => disconnects.push(element.id) };
      made.push(source); return source;
    }
  }
  const graph = AudioGraph.create({ getConstructor: () => Context });
  const a = { id: 'video' }, b = { id: 'audio' }, standard = { id: 'standard' }, dsp = { id: 'dsp' };
  const original = graph.connect(a, standard);
  graph.connect(a, standard);
  graph.routeAll([a, b], dsp);
  graph.routeAll([a, b], standard);
  assert.equal(made.length, 2);
  assert.equal(graph.source(a), original);
  assert.deepEqual(connects, [['video', 'standard'], ['video', 'dsp'], ['audio', 'dsp'], ['video', 'standard'], ['audio', 'standard']]);
  assert.deepEqual(disconnects, ['video', 'video', 'audio']);
  assert.deepEqual(graph.snapshot(), { contextCreated: true, sampleRate: 48000, sourceCount: 2, failedCount: 0, routedCount: 2 });
 });
 test('a failed source creation is remembered and is never attempted twice', () => {
  let attempts = 0;
  class Context {
    constructor() { this.sampleRate = 48000; }
    createMediaElementSource() { attempts++; throw new Error('already sourced'); }
  }
  const graph = AudioGraph.create({ getConstructor: () => Context }), element = {};
  assert.throws(() => graph.source(element), /already sourced/);
  assert.throws(() => graph.source(element), /already sourced/);
  assert.equal(attempts, 1);
  assert.deepEqual(graph.snapshot(), { contextCreated: true, sampleRate: 48000, sourceCount: 0, failedCount: 1, routedCount: 0 });
 });
 test('the extracted Standard EQ build block is identical to the original except for context ownership', () => {
  const source = readFileSync(join(__dirname, 'app.js'), 'utf8');
  const original = readFileSync(join(__dirname, '..', 'tests', 'fixtures', 'standard-eq-build.txt'), 'utf8').trimEnd();
  const start = source.indexOf('  function build() {', source.indexOf('const EQ = (() => {'));
  const end = source.indexOf('\n  function attach(el)', start);
  assert.ok(start >= 0 && end > start, 'EQ build block exists');
  const current = source.slice(start, end).trimEnd();
  assert.equal(current, original.replace('st.ctx = new AC();', 'st.ctx = AudioGraph.context();'));
  assert.match(source, /AudioGraph\.connect\(el, st\.filters\[0\]\)/);
  assert.doesNotMatch(source, /\.createMediaElementSource\(/);
 });
 test('AudioGraph is a core runtime asset and is loaded before the lazy app', () => {
  const { groups } = JSON.parse(readFileSync(join(__dirname, 'assets.json'), 'utf8'));
  assert.ok(groups.core.files.includes('/audio-graph.js'));
  const html = readFileSync(join(__dirname, 'index.html'), 'utf8');
  assert.ok(html.indexOf('src="audio-graph.js"') < html.indexOf('src="section-rail.js"'));
  const embedded = JSON.parse(html.match(/id="ytp-assets">([^<]+)<\/script>/)[1]);
  assert.deepEqual(embedded.groups, groups);
 });
--- a/frontend/autosave.test.js
+++ b/frontend/autosave.test.js
@@ -0,0 +1,65 @@
 const test = require('node:test');
 const assert = require('node:assert/strict');
 const fs = require('node:fs');
 const vm = require('node:vm');
 // Exercise the actual app functions without DOM/player/network dependencies.
 const source = fs.readFileSync(require('node:path').join(__dirname, 'app.js'), 'utf8');
 function harness({ autoPreload = true, cached = [], result = { ok: true, cached: true }, error } = {}) {
  const calls = [], jobs = new Map();
  const video = { id: 'benchmedia01', title: 'Local clip' };
  const context = vm.createContext({
    data: { settings: { autoPreload }, playlists: [{ id: 'pl', videos: [video] }], pinnedPlaylists: [] },
    cachedIds: new Set(cached), downloading: new Set(), downloadMeta: new Map(), saveControllers: new Map(),
    view: { type: 'home' }, current: null, window: {}, AbortController,
    slim: v => v, markCardCacheState() {}, renderSidebar() {}, updateDownloadBadge() {}, toast() {},
    SaveSlots: { acquire: async () => {}, release() {} },
    SaveQueue: { add: v => jobs.set(v.id, { status: 'queued' }), remove: id => jobs.delete(id), progress() {}, state: (id, status, message) => jobs.set(id, { status, message }) },
    API: { cacheDownload: async id => { calls.push(id); if (error) throw error; return result; } },
    recordDeviceFile() {}, warmThumb() {}, thumbUrlFor: () => '', cacheMutations: 0,
  });
  const preload = source.slice(source.indexOf('async function preload(video,'), source.indexOf('// A device copy that failed to play.'));
  const playlists = source.slice(source.indexOf('function preloadPlaylist(pl)'), source.indexOf('// Update a single card\'s saved badge'));
  vm.runInContext(preload + playlists, context);
  return { context, calls, jobs, video };
 }
 test('auto preload tops up playlists, while pinned playlists save with the setting off', async () => {
  const h = harness({ autoPreload: false });
  h.context.preloadPlaylist(h.context.data.playlists[0]);
  await new Promise(r => setImmediate(r));
  assert.deepEqual(h.calls, []);
  h.context.data.pinnedPlaylists = ['pl'];
  h.context.preloadPinnedPlaylists();
  await new Promise(r => setImmediate(r));
  assert.deepEqual(h.calls, [h.video.id]);
  assert.ok(h.context.cachedIds.has(h.video.id));
  assert.equal(h.jobs.size, 0);
  assert.equal(h.context.downloading.size, 0);
  const enabled = harness();
  enabled.context.preloadPlaylist(enabled.context.data.playlists[0]);
  await new Promise(r => setImmediate(r));
  assert.deepEqual(enabled.calls, [enabled.video.id]);
 });
 test('a repeated save shares the in-flight operation and does not download an existing copy', async () => {
  const h = harness();
  await Promise.all([h.context.preload(h.video), h.context.preload(h.video)]);
  await h.context.preload(h.video);
  assert.deepEqual(h.calls, [h.video.id]);
  assert.ok(h.context.cachedIds.has(h.video.id));
  assert.equal(h.context.saveControllers.size, 0);
 });
 test('failed and interrupted saves do not acquire a Saved badge and can be attempted again', async () => {
  for (const options of [{ result: { ok: false, error: 'server failed' } }, { error: new Error('storage quota') }, { result: { ok: false, paused: true } }]) {
    const h = harness(options);
    await h.context.preload(h.video, { quiet: true });
    assert.equal(h.context.cachedIds.has(h.video.id), false);
    assert.equal(h.context.downloading.size, 0);
    assert.equal(h.context.saveControllers.size, 0);
    assert.ok(h.jobs.has(h.video.id));
    await h.context.preload(h.video, { quiet: true });
    assert.equal(h.calls.length, 2);
  }
 });
--- a/frontend/car-mode.css
+++ b/frontend/car-mode.css
@@ -4,4 +4,3 @@
 .car-controls button { min-height: 110px; font: 650 clamp(22px, 3vw, 36px)/1.2 system-ui; background: #fff; color: #050607; border: 3px solid #fff; border-radius: 16px; }
 .car-exit { align-self: flex-start; min-height: 52px; padding: 12px 20px; background: #070809; color: #fff; border: 2px solid #fff; border-radius: 8px; }
 .car-mode button:focus-visible { outline: 4px solid #61caff; outline-offset: 4px; }
 .voice-search { flex-shrink: 0; min-width: 44px; min-height: 44px; }
--- a/frontend/car-mode.js
+++ b/frontend/car-mode.js
@@ -10,8 +10,8 @@
    overlay = doc.createElement('section'); overlay.className = 'car-mode'; overlay.setAttribute('role', 'dialog'); overlay.setAttribute('aria-modal', 'true'); overlay.setAttribute('aria-label', 'Car mode');
    const exit = doc.createElement('button'); exit.type = 'button'; exit.className = 'car-exit'; exit.textContent = 'Exit Car mode'; exit.onclick = close;
    const title = doc.createElement('h1'); const controls = doc.createElement('div'); controls.className = 'car-controls'; let toggle;
-    for (const [label, action] of [['Previous', 'prev'], ['Play / Pause', 'toggle'], ['15 s back', 'back'], ['Next', 'next']]) { const b = doc.createElement('button'); b.type = 'button'; b.textContent = label; b.setAttribute('aria-label', label); b.onclick = () => adapter.action(action); if (action === 'toggle') toggle = b; controls.append(b); }
+    for (const [label, action] of [['Previous', 'prev'], ['Play / Pause', 'toggle'], ['15 s back', 'back'], ['Next', 'next']]) { const b = doc.createElement('button'); b.type = 'button'; b.innerHTML = root.TransportIcons.svg({prev:'previous',toggle:'play',back:'back15',next:'next'}[action]) + '<span>' + label + '</span>'; b.setAttribute('aria-label', label); b.onclick = () => adapter.action(action); if (action === 'toggle') toggle = b; controls.append(b); }
-    const update = () => { const state = adapter.state(); title.textContent = state.title || 'Choose a song before entering Car mode'; toggle.textContent = state.paused ? 'Play' : 'Pause'; }; update();
+    const update = () => { const state = adapter.state(); title.textContent = state.title || 'Choose a song before entering Car mode'; root.TransportIcons.set(toggle, state.paused ? 'play' : 'pause'); toggle.insertAdjacentHTML('beforeend','<span>' + (state.paused ? 'Play' : 'Pause') + '</span>'); }; update();
    overlay.append(exit, title, controls); doc.body.append(overlay); timer = setInterval(update, 500); exit.focus();
    overlay.onkeydown = e => { if (e.key === 'Escape') { e.preventDefault(); close(); } else if (e.key === 'Tab') { const buttons = [...overlay.querySelectorAll('button')], first = buttons[0], last = buttons.at(-1); if (e.shiftKey && doc.activeElement === first) { e.preventDefault(); last.focus(); } else if (!e.shiftKey && doc.activeElement === last) { e.preventDefault(); first.focus(); } } e.stopPropagation(); };
  }
--- a/frontend/car-mode.test.js
+++ b/frontend/car-mode.test.js
@@ -10,11 +10,12 @@ test('lazy Car mode keeps four independent transport buttons and the voice entry
    after(node){this.parent.append(node);}
    setAttribute(name,value){this[name]=value;}
    focus(){}
    insertAdjacentHTML(position,html){this.innerHTML+=html;}
    get isConnected(){return !!this.parent;}
  }
  const body=new Element('body'),input=new Element('input'),form=new Element('form'),voice=new Element('button');form.id='searchForm';voice.id='voiceSearchBtn';body.append(form,input,voice);
  const all=node=>[node,...node.children.flatMap(all)],doc={body,documentElement:{lang:'en'},createElement:tag=>new Element(tag),getElementById:id=>all(body).find(n=>n.id===id)};
-  let section;const actions=[],root={document:doc,navigator:{},SpeechRecognition:function(){},SettingsSections:{register:s=>section=s}};
+  let section;const actions=[],root={document:doc,TransportIcons:require('./download-actions').transport,navigator:{},SpeechRecognition:function(){},SettingsSections:{register:s=>section=s}};
  vm.runInNewContext(fs.readFileSync(__dirname+'/car-mode.js','utf8'),{window:root,setInterval:()=>1,clearInterval:()=>{}});
  root.CarMode.configure({input,action:action=>actions.push(action),state:()=>({paused:true,title:'Song'})});
  root.CarMode.open();const overlay=body.children.find(n=>n.className==='car-mode'),controls=overlay.children.find(n=>n.className==='car-controls');
--- a/frontend/download-actions.css
+++ b/frontend/download-actions.css
@@ -9,3 +9,30 @@ html[data-layout="glass-stage"] :is(.dl-row,.download-job) .download-action { bo
 html[data-layout="glass-stage"] :is(.dl-row,.download-job) .download-action:hover { border-color:var(--glass-line); background:var(--tile-hi); color:var(--text); }
 html[data-layout="glass-stage"] :is(.dl-row,.download-job) .download-action.danger { color:var(--accent-bright); }
 html[data-layout="glass-stage"] :is(.dl-row,.download-job) .download-action:focus-visible { outline-color:var(--accent-bright); }
 /* Transport drawings and touch targets survive layout/state changes. */
 .transport-icon { display:inline-block; flex:none; width:24px; height:24px; vertical-align:middle; fill:none; stroke:currentColor; stroke-width:1.8; stroke-linecap:round; stroke-linejoin:round; pointer-events:none; }
 .transport-shape { display:none; }
 .transport-shape-classic { display:inline; }
 html:is([data-layout="f7-swipe"],[data-layout="glass-stage"],[data-layout="bento-hub"]) .transport-shape-classic { display:none; }
 html[data-layout="f7-swipe"] .transport-shape-f7-swipe,
 html[data-layout="glass-stage"] .transport-shape-glass-stage,
 html[data-layout="bento-hub"] .transport-shape-bento-hub { display:inline; }
 html[data-layout="f7-swipe"] .transport-shape-f7-swipe { fill:currentColor; stroke-width:.7; }
 html[data-layout="f7-swipe"] .transport-icon:is([data-transport-icon="play"],[data-transport-icon="pause"],[data-transport-icon="previous"],[data-transport-icon="next"],[data-transport-icon="forward"]),
 html[data-layout="f7-swipe"] #controls .transport-icon:is([data-transport-icon="play"],[data-transport-icon="pause"],[data-transport-icon="previous"],[data-transport-icon="next"],[data-transport-icon="forward"]) { fill:currentColor; stroke-width:.7; }
 html[data-layout="f7-swipe"] :is([data-transport-icon="back10"],[data-transport-icon="forward10"],[data-transport-icon="back15"]) .transport-shape { fill:none; stroke-width:2; }
 html[data-layout="glass-stage"] .transport-icon,
 html[data-layout="glass-stage"] #controls .transport-icon { stroke-width:1.5; }
 html[data-layout="bento-hub"] .transport-icon { stroke-width:2; stroke-linejoin:round; }
 button:has(> .transport-icon), a.np-btn:has(> .transport-icon) { min-width:44px; min-height:44px; }
 button:has(> .transport-icon) { align-items:center; justify-content:center; }
 html[data-layout="f7-swipe"] :is(#playBtn,#stgPlay,.service-btn-play,.rv-play) { border-radius:50%; }
 html[data-layout="f7-swipe"] #playBtn { width:64px; height:64px; }
 html[data-layout="glass-stage"] :is(#playBtn,.mini-btn,.rv-tbtn):has(> .transport-icon) { background:var(--tile,rgba(255,255,255,.08)); border:1px solid var(--line); backdrop-filter:blur(12px); }
 html[data-layout="bento-hub"] :is(#playBtn,.mini-btn,.service-btn,.rv-tbtn):has(> .transport-icon) { border-radius:16px; }
 .car-controls .transport-icon { width:36px; height:36px; margin-right:12px; }
 .gh-seek .transport-icon, .empty-icon .transport-icon { width:48px; height:48px; }
 .ph-logo .transport-icon { width:60%; height:60%; }
 .home-pl-play:has(> .transport-icon) { min-width:44px; min-height:44px; }
--- a/frontend/download-actions.js
+++ b/frontend/download-actions.js
@@ -1,6 +1,83 @@
 /* One action control for the Downloads page and Settings download manager. */
 (function(root) {
  'use strict';
  // One SVG definition per media concept; every instance inherits its control colour.
  const mediaPaths = {
    download: '<path d="M12 3v12m-5-5 5 5 5-5M4 17v4h16v-4"/>',
    offline: '<circle cx="12" cy="12" r="9"/><path d="m7.5 12 3 3 6-6"/>',
    progress: '<path d="M12 3a9 9 0 1 1-9 9"/>'
  };
  const variants = {
    'classic': mediaPaths,
    'f7-swipe': {
      download: '<path d="M12 3v12m-5-5 5 5 5-5M4 17v2a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2v-2"/>',
      offline: '<circle cx="12" cy="12" r="9"/><path d="m8 12 3 3 5-6"/>',
      progress: '<path d="M12 3a9 9 0 1 1-9 9"/>'
    },
    'glass-stage': {
      download: '<path d="M12 4v11m-4-4 4 4 4-4M5 20h14"/>',
      offline: '<circle cx="12" cy="12" r="8"/><path d="m8.5 12 2.5 2.5 4.5-5"/>',
      progress: '<path d="M12 4a8 8 0 1 1-8 8"/>'
    },
    'bento-hub': {
      download: '<path d="M12 4v11m-4-4 4 4 4-4M5 17v3h14v-3"/>',
      offline: '<rect x="4" y="4" width="16" height="16" rx="4"/><path d="m8 12 3 3 5-6"/>',
      progress: '<path d="M12 4a8 8 0 1 1-8 8"/>'
    }
  };
  const use = kind => `<use href="#media-${kind}"/>`;
  const svg = (kind, extra = '') => `<svg class="media-icon ${extra}" data-media-icon="${kind}" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">${use(kind)}</svg>`;
  const media = { paths: mediaPaths, use, svg };
  if (root.document) {
    const defs = root.document.createElementNS('http://www.w3.org/2000/svg', 'svg');
    defs.setAttribute('aria-hidden', 'true'); defs.setAttribute('width', '0'); defs.setAttribute('height', '0');
    defs.style.position = 'absolute'; defs.style.pointerEvents = 'none';
    defs.innerHTML = '<defs>' + Object.keys(mediaPaths).map(kind => `<g id="media-${kind}">${Object.entries(variants).map(([layout, paths]) => `<g class="media-shape media-shape-${layout}">${paths[kind]}</g>`).join('')}</g>`).join('') + '</defs>';
    root.document.body.appendChild(defs);
    root.MediaIcons = media;
  }
  // Select variants on visible use elements: ancestor CSS in referenced SVG groups
  // can report changed styles without repainting the cloned geometry in Chromium.
  const transportPaths = {
    play: '<path d="m8 5 11 7-11 7z"/>',
    pause: '<rect x="6" y="5" width="4" height="14" rx="1"/><rect x="14" y="5" width="4" height="14" rx="1"/>',
    previous: '<path d="m19 5-10 7 10 7zM5 5v14"/>',
    next: '<path d="m5 5 10 7-10 7zM19 5v14"/>',
    forward: '<path d="m3 5 9 7-9 7zM12 5l9 7-9 7z"/>'
  };
  for (const seconds of [10,15]) for (const direction of ['back','forward']) {
    transportPaths[direction + seconds] = (direction === 'back'
      ? '<path d="M4 12a8 8 0 1 0 3-6.2M4 4v4.5h4.5"/>'
      : '<path d="M20 12a8 8 0 1 1-3-6.2M20 4v4.5h-4.5"/>') +
      `<text x="12" y="15.5" text-anchor="middle" font-size="7.5" font-weight="700" fill="currentColor" stroke="none">${seconds}</text>`;
  }
  const transportVariants = Object.fromEntries(['classic','f7-swipe','glass-stage','bento-hub'].map(layout => [layout,{...transportPaths}]));
  Object.assign(transportVariants['f7-swipe'], {
    play: '<path d="M8 5.8a1 1 0 0 1 1.5-.86l10 6.2a1 1 0 0 1 0 1.72l-10 6.2A1 1 0 0 1 8 18.2z"/>',
    previous: '<rect x="4" y="5" width="3" height="14" rx="1.5"/><path d="M19 6a1 1 0 0 0-1.5-.86l-8.5 6a1 1 0 0 0 0 1.72l8.5 6A1 1 0 0 0 19 18z"/>',
    next: '<rect x="17" y="5" width="3" height="14" rx="1.5"/><path d="M5 6a1 1 0 0 1 1.5-.86l8.5 6a1 1 0 0 1 0 1.72l-8.5 6A1 1 0 0 1 5 18z"/>'
  });
  const transport = {
    paths: transportPaths, variants: transportVariants,
    svg(kind) {
      if (!transportPaths[kind]) throw new Error('Unknown transport icon: ' + kind);
      return `<svg class="transport-icon" data-transport-icon="${kind}" viewBox="0 0 24 24" fill="none" stroke="currentColor" aria-hidden="true">${Object.keys(transportVariants).map(layout=>`<use class="transport-shape transport-shape-${layout}" href="#transport-${kind}${layout==='classic'?'':'-'+layout}"/>`).join('')}</svg>`;
    },
    set(button, kind, label) {
      if (!button) return;
      const iconId=button.querySelector?.('.transport-icon')?.id;
      button.innerHTML = this.svg(kind);
      if(iconId)button.querySelector('.transport-icon').id=iconId;
      button.setAttribute('aria-label', label || (kind === 'pause' ? 'Pause' : 'Play'));
    }
  };
  if (root.document) {
    const defs = root.document.createElementNS('http://www.w3.org/2000/svg','svg');
    defs.setAttribute('aria-hidden','true'); defs.setAttribute('width','0'); defs.setAttribute('height','0');
    defs.style.position='absolute'; defs.style.pointerEvents='none';
    defs.innerHTML='<defs>'+Object.keys(transportPaths).flatMap(kind=>Object.entries(transportVariants).map(([layout,paths])=>`<g id="transport-${kind}${layout==='classic'?'':'-'+layout}">${paths[kind]}</g>`)).join('')+'</defs>';
    root.document.body.appendChild(defs); root.TransportIcons=transport;
  }
  const paths = {
    retry: '<path d="M3 11a9 9 0 1 1 2.6 7M3 3v8h8"/>',
    cancel: '<path d="m6 6 12 12M6 18 18 6"/>',
@@ -19,6 +96,6 @@
    const text = doc.createElement('span'); text.textContent = label;
    button.append(icon, text); return button;
  }
-  const api = { create };
+  const api = { create, media, transport };
  if (typeof module !== 'undefined' && module.exports) module.exports = api; else root.DownloadActions = api;
 })(globalThis);
--- a/frontend/downloads-page.js
+++ b/frontend/downloads-page.js
@@ -119,11 +119,7 @@
      empty.className = 'empty-state dl-empty-state';
      empty.innerHTML = `
        <div class="empty-icon dl-empty-icon-wrapper" aria-hidden="true">
-          <svg class="dl-empty-svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round">
+          <svg class="dl-empty-svg media-icon" data-media-icon="download" viewBox="0 0 24 24" aria-hidden="true"><use href="#media-download"/></svg>
            <path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"></path>
            <polyline points="7 10 12 15 17 10"></polyline>
            <line x1="12" y1="15" x2="12" y2="3"></line>
          </svg>
        </div>
        <h3 class="empty-title">No active downloads</h3>
        <p class="empty-desc">Saves in progress appear here with live status. Videos you save land in <strong>Saved</strong>.</p>
--- a/frontend/downloads.js
+++ b/frontend/downloads.js
@@ -12,7 +12,7 @@
  let adapter, total = 0;
  function configure(options) {
    adapter = options;
-    root.SettingsSections.register({ id: 'downloads-storage', title: 'Downloads & storage', cluster: 'Library & storage', description: 'Active queued paused failed saves, disk usage and playlist sizes', icon: '<path d="M12 3v12m-5-5 5 5 5-5M4 17v4h16v-4"/>', summary: () => `${adapter.slots()} at once · ${bytes(total)}`, render(container) {
+    root.SettingsSections.register({ id: 'downloads-storage', title: 'Downloads & storage', cluster: 'Library & storage', description: 'Active queued paused failed saves, disk usage and playlist sizes', icon: '<use href="#media-download"/>', summary: () => `${adapter.slots()} at once · ${bytes(total)}`, render(container) {
      const doc = container.ownerDocument;
      const heading = doc.createElement('h3'); heading.textContent = 'Downloads & storage';
      const jobs = doc.createElement('div'); jobs.className = 'download-manager'; jobs.setAttribute('aria-label', 'Download manager');
--- a/frontend/fullscreen-orientation.js
+++ b/frontend/fullscreen-orientation.js
@@ -24,7 +24,7 @@
    function lift() { if (home || stage.parentElement === document.body) return; home = { parent: stage.parentElement, next: stage.nextSibling }; document.body.append(stage); }
    function unlift() { if (!home) return; const { parent, next } = home; home = null; if (next && next.parentNode === parent) parent.insertBefore(stage, next); else parent.append(stage); }
    const hud = document.createElement('div'); hud.className = 'fullscreen-hud'; hud.hidden = true;
-    hud.innerHTML = '<div class="fullscreen-top"><div class="fullscreen-title" aria-live="polite"></div><button type="button" aria-label="Exit fullscreen" title="Exit fullscreen"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="M9 4H4v5m0-5 6 6m5 9h5v-5m0 5-6-6"/></svg></button></div><div class="fullscreen-controls"><button type="button" aria-label="Play or pause" title="Play or pause"><svg class="fill" viewBox="0 0 24 24" aria-hidden="true"><path d="M8 5v14l11-7z"/></svg></button><input type="range" min="0" max="1000" value="0" aria-label="Seek video"><button type="button" class="fullscreen-orientation" aria-label="Change fullscreen orientation" title="Change fullscreen orientation"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="M4 8V4h4M20 16v4h-4M4 4l6 6m4 4 6 6M20 8V4h-4M4 16v4h4M20 4l-6 6m-4 4-6 6"/></svg></button><button type="button" class="fullscreen-fit" aria-label="Change video fit" title="Change video fit"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="M4 7V4h3M17 4h3v3M20 17v3h-3M7 20H4v-3M7 9h10v6H7z"/></svg></button></div>';
+    hud.innerHTML = '<div class="fullscreen-top"><div class="fullscreen-title" aria-live="polite"></div><button type="button" aria-label="Exit fullscreen" title="Exit fullscreen"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="M9 4H4v5m0-5 6 6m5 9h5v-5m0 5-6-6"/></svg></button></div><div class="fullscreen-controls"><button type="button" aria-label="Play or pause" title="Play or pause">' + root.TransportIcons.svg('play') + '</button><input type="range" min="0" max="1000" value="0" aria-label="Seek video"><button type="button" class="fullscreen-orientation" aria-label="Change fullscreen orientation" title="Change fullscreen orientation"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="M4 8V4h4M20 16v4h-4M4 4l6 6m4 4 6 6M20 8V4h-4M4 16v4h4M20 4l-6 6m-4 4-6 6"/></svg></button><button type="button" class="fullscreen-fit" aria-label="Change video fit" title="Change video fit"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="M4 7V4h3M17 4h3v3M20 17v3h-3M7 20H4v-3M7 9h10v6H7z"/></svg></button></div>';
    stage.append(hud);
    const play = hud.querySelector('button[aria-label="Play or pause"]'), orientation = hud.querySelector('.fullscreen-orientation'), fitButton = hud.querySelector('.fullscreen-fit'), exit = hud.querySelector('button[aria-label="Exit fullscreen"]'), range = hud.querySelector('input');
    const title = hud.querySelector('.fullscreen-title');
@@ -109,9 +109,7 @@
        range.style.setProperty('--seek-progress', `${s.duration ? Math.min(100, s.time / s.duration * 100) : 0}%`);
        play.setAttribute('aria-label', s.paused ? 'Play video' : 'Pause video');
        play.title = s.paused ? 'Play' : 'Pause';
-        play.innerHTML = s.paused
+        root.TransportIcons.set(play, s.paused ? 'play' : 'pause', s.paused ? 'Play video' : 'Pause video');
          ? '<svg class="fill" viewBox="0 0 24 24" aria-hidden="true"><path d="M8 5v14l11-7z"/></svg>'
          : '<svg class="fill" viewBox="0 0 24 24" aria-hidden="true"><path d="M6 5h4v14H6zm8 0h4v14h-4z"/></svg>';
      }, 250);
    }
    document.addEventListener('fullscreenchange', () => { if (active && !document.fullscreenElement && native) cleanup(); });
--- a/frontend/glass-controls.js
+++ b/frontend/glass-controls.js
@@ -6,9 +6,9 @@
    music:'<path d="M9 18V5l11-2v13M9 8l11-2"/><ellipse cx="6" cy="18" rx="3" ry="2"/><ellipse cx="17" cy="16" rx="3" ry="2"/>',
    add:'<path d="M12 5v14M5 12h14"/>', close:'<path d="m6 6 12 12M18 6 6 18"/>',
    search:'<circle cx="10.5" cy="10.5" r="6.5"/><path d="m16 16 5 5"/>',
-    save:'<path d="M12 3v12m-5-5 5 5 5-5M4 17v4h16v-4"/>',
+    save:'<use href="#media-download"/>',
-    play:'<path d="m8 5 11 7-11 7z"/>', pause:'<path d="M8 5v14M16 5v14"/>',
+    play:'<use class="transport-shape transport-shape-classic" href="#transport-play"/><use class="transport-shape transport-shape-f7-swipe" href="#transport-play-f7-swipe"/><use class="transport-shape transport-shape-glass-stage" href="#transport-play-glass-stage"/><use class="transport-shape transport-shape-bento-hub" href="#transport-play-bento-hub"/>', pause:'<use class="transport-shape transport-shape-classic" href="#transport-pause"/><use class="transport-shape transport-shape-f7-swipe" href="#transport-pause-f7-swipe"/><use class="transport-shape transport-shape-glass-stage" href="#transport-pause-glass-stage"/><use class="transport-shape transport-shape-bento-hub" href="#transport-pause-bento-hub"/>',
-    next:'<path d="m5 5 10 7-10 7zM19 5v14"/>', previous:'<path d="m19 5-10 7 10 7zM5 5v14"/>',
+    next:'<use class="transport-shape transport-shape-classic" href="#transport-next"/><use class="transport-shape transport-shape-f7-swipe" href="#transport-next-f7-swipe"/><use class="transport-shape transport-shape-glass-stage" href="#transport-next-glass-stage"/><use class="transport-shape transport-shape-bento-hub" href="#transport-next-bento-hub"/>', previous:'<use class="transport-shape transport-shape-classic" href="#transport-previous"/><use class="transport-shape transport-shape-f7-swipe" href="#transport-previous-f7-swipe"/><use class="transport-shape transport-shape-glass-stage" href="#transport-previous-glass-stage"/><use class="transport-shape transport-shape-bento-hub" href="#transport-previous-bento-hub"/>',
    repeat:'<path d="m17 2 4 4-4 4M3 11V8a2 2 0 0 1 2-2h16M7 22l-4-4 4-4m14-1v3a2 2 0 0 1-2 2H3"/>',
    edit:'<path d="m14 5 5 5M4 20l5-1L21 7l-4-4L5 15z"/>',
    lyrics:'<rect x="9" y="3" width="6" height="11" rx="3"/><path d="M5 10v2a7 7 0 0 0 14 0v-2M12 19v3M8 22h8"/>',
@@ -23,7 +23,7 @@
    television:'<rect x="3" y="4" width="18" height="13" rx="2"/><path d="M8 21h8m-4-4v4"/>', pin:'<path d="M9 3h6l-1 6 4 4H6l4-4zM12 13v8"/>',
    devices:'<rect x="3" y="4" width="14" height="12" rx="2"/><path d="M7 20h6M10 16v4"/><rect x="17" y="10" width="5" height="11" rx="1"/>'
  };
-  const glyphs = {'＋':'add','✕':'close','×':'close','✖':'close','🔍':'search','🔎':'search','⬇':'save','⤓':'save','💾':'save','▶':'play','⏸':'pause','⏭':'next','⏮':'previous','↻':'repeat','↺':'repeat','✎':'edit','✏':'edit','📝':'edit','🎤':'lyrics','↗':'share','⧉':'copy','✓':'check','📁':'folder','⚙':'settings','📋':'chapters','🕘':'clock','🔀':'shuffle','📡':'devices','▾':'down','▸':'right','←':'back','⋯':'more','⋮':'more','🗑':'trash','🎵':'music'};
+  const glyphs = {'＋':'add','✕':'close','×':'close','✖':'close','🔍':'search','🔎':'search','▶':'play','⏸':'pause','⏭':'next','⏮':'previous','↻':'repeat','↺':'repeat','✎':'edit','✏':'edit','📝':'edit','🎤':'lyrics','↗':'share','⧉':'copy','✓':'check','📁':'folder','⚙':'settings','📋':'chapters','🕘':'clock','🔀':'shuffle','📡':'devices','▾':'down','▸':'right','←':'back','⋯':'more','⋮':'more','🗑':'trash','🎵':'music'};
  function leadingGlyph(text,bento=false) {
    const mapping=bento?{...glyphs,'📺':'television','⏱':'clock','⇅':'settings','📌':'pin','🎧':'music','📚':'folder'}:glyphs;
    const prefix = text.match(/^\s*/)[0], rest = text.slice(prefix.length);
--- a/frontend/glass-controls.test.js
+++ b/frontend/glass-controls.test.js
@@ -1,7 +1,7 @@
 const test=require('node:test'),assert=require('node:assert/strict');
 const {leadingGlyph}=require('./glass-controls.js');
 test('glass icon substitution preserves leading whitespace and remaining labels',()=>{
- assert.deepEqual(leadingGlyph('  ⬇ Save'),{kind:'save',original:'  ⬇',rest:' Save'});
+ assert.equal(leadingGlyph('Save'),null);
 assert.deepEqual(leadingGlyph('⚙️ Settings'),{kind:'settings',original:'⚙️',rest:' Settings'});
 assert.equal(leadingGlyph('A song with 🔍 in its title'),null);
 assert.equal(leadingGlyph('Clear all'),null);
--- a/frontend/index.html
+++ b/frontend/index.html
--- a/frontend/jamesdsp-app.test.js
+++ b/frontend/jamesdsp-app.test.js
@@ -0,0 +1,66 @@
 const { test } = require('node:test');
 const assert = require('node:assert/strict');
 const { readFileSync } = require('node:fs');
 const { join } = require('node:path');
 const vm = require('node:vm');
 const app = readFileSync(join(__dirname, 'app.js'), 'utf8');
 const views = readFileSync(join(__dirname, 'views-core.js'), 'utf8');
 function parsePreset(text) {
  const declaration = views.match(/function parseJamesDspPreset\(text\) \{[\s\S]*?\n\}/)?.[0];
  assert.ok(declaration, 'preset parser is present');
  const context = vm.createContext({});
  vm.runInContext(`${declaration}; globalThis.parse = parseJamesDspPreset;`, context);
  return context.parse(text);
 }
 test('the persisted engine is Standard by default and upgrades missing JamesDSP settings safely', () => {
  assert.match(app, /jamesDsp: \{ enabled: false, downloadForOffline: false, preset: 'flat', params: \{\}, irRef: null \}/);
  assert.match(app, /downloadForOffline: saved\.downloadForOffline === true/);
  assert.match(app, /enabled: saved\.enabled === true/);
  assert.match(app, /preset: typeof saved\.preset === 'string' \? saved\.preset : 'flat'/);
  assert.match(app, /settings: normalizeJamesDspSettings\(\{ \.\.\.DEFAULT_SETTINGS, \.\.\.\(loaded\.settings \|\| \{\}\) \}\)/);
  assert.match(app, /data\.settings = normalizeJamesDspSettings\(\{ \.\.\.DEFAULT_SETTINGS, \.\.\.payload\.settings \}\)/);
 });
 test('live JamesDSP shares the existing iOS gate and never stacks over EqRender copies', () => {
  assert.match(app, /const available = \(\) => !!AC && \(!isIOS \|\| data\.settings\.liveAudioIOS === true\)/);
  assert.match(app, /if \(data\.settings\?\.jamesDsp\?\.enabled\) return null/);
  assert.match(app, /const active = \(\) => EQ\.isIOS\(\) && WEB && !data\.settings\?\.jamesDsp\?\.enabled/);
  assert.match(app, /if \(rendered\(\)\) throw new Error\('This song is already playing a Standard processed copy\./);
 });
 test('EQ creates no second context or element source and passes Standard fallback routing to the controller', () => {
  assert.equal((app.match(/\.createMediaElementSource\(/g) || []).length, 0);
  assert.match(app, /st\.ctx = AudioGraph\.context\(\)/);
  assert.match(app, /AudioGraph\.connect\(el, st\.filters\[0\]\)/);
  assert.match(app, /standardInput: st\.filters\[0\]/);
  assert.match(app, /dspController\.setLevelDb\(st\.levelDb\)/);
  assert.match(app, /if \(data\.settings\.jamesDsp\?\.enabled\) \{[\s\S]{0,450}startDsp\(\)/);
  assert.match(app, /request !== dspRequest \|\| !data\.settings\.jamesDsp\?\.enabled/);
 });
 test('Playback settings expose persisted presets, bands, safe import/export, IR, and A/B bypass', () => {
  assert.match(views, /sel\('setSoundEngine'/);
  assert.match(views, /sel\('setDspPreset'/);
  for (const id of ['setDspCompressor', 'dspPresetImportBtn', 'dspPresetExportBtn', 'dspResetBtn', 'dspIrFile']) assert.ok(views.includes(`id="${id}"`), id);
  assert.match(views, /\[25, 40, 63, 100, 160, 250, 400, 630, 1000, 1600, 2500, 4000, 6300, 10000, 16000\]/);
  assert.match(views, /imported\?\.texts/);
  assert.doesNotMatch(views, /liveprog|ddc|arbitrary/);
  assert.match(views, /navigator\.hardwareConcurrency/);
  assert.match(views, /Long impulse responses are disabled/);
  assert.doesNotMatch(views, /44\.1 or 48 kHz/);
  assert.match(views, /setDspSpatialMode/);
  assert.match(views, /data-dsp-param="convolver\.predelayMs"/);
  assert.match(views, /data-dsp-param="convolver\.mix"/);
  assert.match(app, /Bypass JamesDSP/);
  assert.match(app, /toggleDspBypass/);
 });
 test('preset import validates ranges and excludes text-effect parameters', () => {
  assert.deepEqual(JSON.parse(JSON.stringify(parsePreset(JSON.stringify({ version: 1, preset: 'warm', params: { 'eq.band0': 3, 'bass.enabled': 1 } })))), { preset: 'warm', params: { 'eq.band0': 3, 'bass.enabled': 1 } });
  assert.throws(() => parsePreset({ version: 1, preset: 'flat', params: { 'liveprog.enabled': 1 } }), /text effects are disabled|Unsupported preset setting/);
  assert.throws(() => parsePreset({ version: 1, params: { 'eq.band0': 50 } }), /Unsupported preset setting/);
  assert.throws(() => parsePreset({ version: 1, texts: { effect: 'unsafe' }, params: {} }), /text effects are disabled/);
 });
--- a/frontend/jamesdsp-assets.test.js
+++ b/frontend/jamesdsp-assets.test.js
@@ -0,0 +1,68 @@
 const { test } = require('node:test');
 const assert = require('node:assert/strict');
 const { readFileSync } = require('node:fs');
 const { join } = require('node:path');
 const root = __dirname;
 const assets = JSON.parse(readFileSync(join(root, 'assets.json'), 'utf8'));
 const group = assets.groups['feature:jamesdsp'];
 test('JamesDSP runtime files live only in a lazy background group', () => {
  assert.ok(group, 'feature group exists');
  assert.equal(group.contract, 1);
  assert.equal(group.eager, false);
  assert.equal(group.background, true);
  assert.equal(group.offlineOptIn, 'jamesDsp');
  assert.deepEqual(group.dependencies, ['feature:eq-core', 'feature:vocal-reducer']);
  assert.deepEqual(group.files, [
    '/vendor/jamesdsp/jamesdsp-feature.js',
    '/vendor/jamesdsp/jamesdsp-node.mjs',
    '/vendor/jamesdsp/params.mjs',
    '/vendor/jamesdsp/ir-utils.mjs',
    '/vendor/jamesdsp/ir-builtins.mjs',
    '/vendor/jamesdsp/ir-store.mjs',
    '/vendor/jamesdsp/worklet.mjs',
    '/vendor/jamesdsp/dsp/jamesdsp-a982b53.mjs',
    '/vendor/jamesdsp/dsp/jamesdsp.wasm',
  ]);
  for (const path of group.files) assert.equal(assets.groups.core.files.includes(path), false, `${path} is not core`);
  const sw = readFileSync(join(root, 'sw.js'), 'utf8');
  for (const path of group.files) assert.equal(sw.includes(`'${path}'`), false, `${path} is not in the legacy shell`);
 });
 test('JamesDSP resolves every module dependency through the page build manifest', () => {
  const node = readFileSync(join(root, 'vendor/jamesdsp/jamesdsp-node.mjs'), 'utf8');
  const worklet = readFileSync(join(root, 'vendor/jamesdsp/worklet.mjs'), 'utf8');
  assert.match(node, /globalThis\.Lazy\?\.url\?\.\(path\)/);
  assert.match(node, /assetURL\('\/vendor\/jamesdsp\/dsp\/jamesdsp\.wasm'/);
  assert.match(node, /assetURL\('\/vendor\/jamesdsp\/params\.mjs'/);
  assert.match(node, /processorOptions:\{wasmBytes\}/);
  assert.match(worklet, /import createJamesDSP from '\.\/dsp\/jamesdsp-a982b53\.mjs'/);
  assert.doesNotMatch(worklet, /import\(/);
  assert.match(node, /context\.sampleRate<8000\|\|context\.sampleRate>96000/);
  assert.match(node, /!\[1,2,4\]\.includes\(buffer\.numberOfChannels\) \|\| buffer\.length>65536/);
  const feature = readFileSync(join(root, 'vendor/jamesdsp/jamesdsp-feature.js'), 'utf8');
  assert.match(feature, /Lazy\.url\('\/vendor\/jamesdsp\/jamesdsp-node\.mjs'\)/);
  assert.match(feature, /Lazy\.url\('\/vendor\/jamesdsp\/dsp\/jamesdsp\.wasm'\)/);
 });
 test('player wrapper rejects text effects while portable presets retain IR references', () => {
  const node = readFileSync(join(root, 'vendor/jamesdsp/jamesdsp-node.mjs'), 'utf8');
  const worklet = readFileSync(join(root, 'vendor/jamesdsp/worklet.mjs'), 'utf8');
  assert.match(node, /Text effects are disabled in this player version/);
  assert.match(node, /toJSON\(\) \{return \{version:2,params:/);
  assert.match(node, /irCapFrames:view\.getUint32\(32,true\)/);
  assert.match(node, /getIR\(preset\.irRef\.name\)/);
  const feature = readFileSync(join(root, 'vendor/jamesdsp/jamesdsp-feature.js'), 'utf8');
  assert.match(feature, /async function prepareIR\(context, buffer, maxFrames = 65536\)/);
  assert.match(feature, /prepared\.length>Math\.min\(65536,maxFrames\)/);
  assert.doesNotMatch(worklet, /data\.type==='text'/);
 });
 test('vendor provenance pins the source and retains both supplied license texts', () => {
  const version = readFileSync(join(root, 'vendor/jamesdsp/VERSION.txt'), 'utf8');
  assert.match(version, /a982b53c4ab347d1d9c50f4ce7ee3c2735eaa817/);
  assert.match(version, /GPL-2\.0 text/);
  assert.ok(readFileSync(join(root, 'vendor/jamesdsp/LICENSE.txt'), 'utf8').includes('Version 3'));
  assert.ok(readFileSync(join(root, 'vendor/jamesdsp/UPSTREAM-MAIN-LICENSE.txt'), 'utf8').includes('Version 2'));
 });
--- a/frontend/jamesdsp-controller.test.js
+++ b/frontend/jamesdsp-controller.test.js
@@ -0,0 +1,114 @@
 const { test } = require('node:test');
 const assert = require('node:assert/strict');
 const { createController } = require('./vendor/jamesdsp/jamesdsp-feature.js');
 function fixture({ loadNode } = {}) {
  const routed = [], errors = [], created = [], configured = [], bypass = [];
  const graph = { routeAll: (elements, destination) => routed.push([elements.map(x => x.id), destination]) };
  const gainParam = { value: 1, cancelScheduledValues() {}, setValueAtTime(v) { this.value = v; }, linearRampToValueAtTime(v) { this.value = v; } };
  const context = { sampleRate: 48000, state: 'running', currentTime: 0, destination: 'destination', createGain: () => ({ gain: gainParam, connect() {}, disconnect() {} }), resume: async () => {} };
  const standardInput = 'standard-input', elements = [{ id: 'video' }, { id: 'audio' }];
  const prepareGraph = async () => ({ context, standardInput, elements });
  const defaultLoad = async () => {
    const listeners = new Map();
    const instance = {
      node: { connect() {}, disconnect() {} }, destroyed: false,
      addEventListener(type, fn) { listeners.set(type, fn); },
      removeEventListener(type, fn) { if (listeners.get(type) === fn) listeners.delete(type); },
      async setBypass(v) { bypass.push(v); },
      async applyPreset(params) { configured.push({ ...params }); },
      async setParam(name, value) { configured.push({ [name]: value }); },
      destroy() { this.destroyed = true; },
      fail(error) { listeners.get('error')?.({ detail: error }); },
    };
    created.push(instance); return instance;
  };
  const controller = createController({ graph, prepareGraph, loadNode: loadNode || defaultLoad, onError: error => errors.push(error) });
  return { controller, routed, errors, created, configured, bypass, context, elements, standardInput };
 }
 test('enable routes one initialized JamesDSP node and disable restores Standard before destroying it', async () => {
  const f = fixture();
  assert.equal(await f.controller.enable({ preset: 'bass', params: { gain: -2 } }, 3), true);
  assert.equal(f.controller.active, true);
  assert.deepEqual(f.routed, [[['video', 'audio'], f.created[0].node]]);
  assert.equal(f.created.length, 1);
  assert.equal(f.controller.state().liveHeaps, 1);
  assert.equal(f.controller.state().maxLiveHeaps, 1);
  const standard = f.controller.disable();
  assert.deepEqual(f.routed.at(-1), [['video', 'audio'], f.standardInput]);
  await standard;
  assert.equal(f.created[0].destroyed, true);
  assert.equal(f.controller.state().liveHeaps, 0);
  assert.equal(f.controller.state().nodesDestroyed, 1);
  assert.equal(f.errors.length, 0);
 });
 test('a rejected or unsupported engine leaves the Standard route active', async () => {
  const f = fixture({ loadNode: async () => { throw new Error('corrupt wasm'); } });
  await assert.rejects(f.controller.enable({ preset: 'flat' }), /corrupt wasm/);
  assert.deepEqual(f.routed, [[['video', 'audio'], f.standardInput]]);
  assert.equal(f.controller.active, false);
  assert.equal(f.controller.state().liveHeaps, 0);
  assert.equal(f.errors.length, 1);
  const supportedRate = fixture();
  supportedRate.context.sampleRate = 32000;
  await supportedRate.controller.enable({ preset: 'flat' });
  assert.equal(supportedRate.controller.state().active, true);
  assert.equal(supportedRate.controller.state().sampleRate, 32000);
 });
 test('a runtime worklet failure switches sources to Standard before destroying the heap', async () => {
  const f = fixture();
  await f.controller.enable({ preset: 'flat' });
  const instance = f.created[0];
  instance.fail(new Error('processor fault'));
  assert.deepEqual(f.routed.at(-1), [['video', 'audio'], f.standardInput]);
  assert.equal(instance.destroyed, true);
  assert.equal(f.controller.active, false);
  assert.equal(f.controller.state().liveHeaps, 0);
  assert.match(f.errors[0].message, /processor fault/);
 });
 test('disable during async node loading prevents a late DSP route', async () => {
  let finish;
  const f = fixture({ loadNode: () => new Promise(resolve => { finish = resolve; }) });
  const enabling = f.controller.enable({ preset: 'flat' });
  await new Promise(resolve => setImmediate(resolve));
  const disabling = f.controller.disable();
  const neverRouted = {
    node: { connect() {}, disconnect() {} },
    addEventListener() {}, removeEventListener() {}, setBypass: async () => {}, applyPreset: async () => {}, setParam: async () => {}, destroy() { this.destroyed = true; },
  };
  finish(neverRouted);
  await enabling; await disabling;
  assert.equal(f.routed.some(([, destination]) => destination === neverRouted.node), false);
  assert.equal(neverRouted.destroyed, true);
  assert.equal(f.controller.state().maxLiveHeaps, 0);
 });
 test('preset gain and Level gain combine within engine bounds without pausing playback', async () => {
  const f = fixture();
  await f.controller.enable({ preset: 'loudness', params: { gain: 8 } }, 9);
  assert.ok(f.configured.some(entry => entry.gain === 12));
  assert.equal(f.created.length, 1);
  assert.equal(f.controller.state().maxLiveHeaps, 1);
  assert.equal(f.controller.active, true);
 });
 test('A/B bypass is retained when settings are reapplied', async () => {
  const f = fixture();
  await f.controller.enable({ preset: 'warm' }, 0);
  assert.equal(await f.controller.toggleBypass(), true);
  assert.equal(f.controller.state().route, 'standard');
  assert.deepEqual(f.routed.at(-1), [['video', 'audio'], f.standardInput], 'bypass follows the exact Standard route');
  await f.controller.enable({ preset: 'bass' }, 0);
  assert.equal(f.controller.state().bypassed, true);
  assert.equal(f.controller.state().route, 'standard');
  assert.deepEqual(f.routed.at(-1), [['video', 'audio'], f.standardInput], 'settings changes cannot replace the Standard route while bypassed');
  assert.ok(f.bypass.at(-1));
  assert.equal(await f.controller.toggleBypass(), false);
  assert.equal(f.controller.state().route, 'jamesdsp');
  assert.equal(f.bypass.at(-1), false);
 });
--- a/frontend/jamesdsp-ir.test.js
+++ b/frontend/jamesdsp-ir.test.js
@@ -0,0 +1,23 @@
 const { test } = require('node:test');
 const assert = require('node:assert/strict');
 test('generated room responses support four true-stereo paths and respect the low-memory cap', async () => {
  const { generateIR, BUILTIN_IRS } = await import('./vendor/jamesdsp/ir-builtins.mjs');
  const { resampleIR } = await import('./vendor/jamesdsp/ir-utils.mjs');
  const ir = generateIR('Hall', 48000, 4, { maxFrames: 24000 });
  assert.equal(ir.numberOfChannels, 4);
  assert.equal(ir.length, 24000);
  assert.equal(ir.truncated, true);
  assert.ok(ir.getChannelData(0).some((sample, i) => sample !== ir.getChannelData(1)[i]), 'each matrix path has distinct taps');
  const converted = resampleIR(ir, 32000);
  assert.equal(converted.sampleRate, 32000);
  assert.equal(converted.numberOfChannels, 4);
  assert.equal(converted.length, 16000);
  assert.deepEqual(Object.keys(BUILTIN_IRS), ['Small room', 'Hall', 'Plate', 'Cathedral']);
 });
 test('the IndexedDB store rejects impulse responses beyond its measured internal-frame cap', async () => {
  const { saveIR } = await import('./vendor/jamesdsp/ir-store.mjs');
  const oversized = { sampleRate: 48000, numberOfChannels: 4, length: 65537, getChannelData: () => new Float32Array(65537) };
  await assert.rejects(saveIR('oversized', oversized), /65,536-frame internal limit/);
 });
--- a/frontend/lazy.js
+++ b/frontend/lazy.js
@@ -6,6 +6,7 @@
  try { manifest = JSON.parse(doc.getElementById('ytp-assets').textContent); }
  catch { return; } // The index must supply this map; never fetch one during boot.
  const assets = new Map(), groups = new Map(), hooks = new Map();
  let warmScheduled = false;
  const css = new Set([...doc.querySelectorAll('link[data-lazy-css]')].map(link => link.dataset.lazyCss));
  const selected = new Map();
  const url = path => selected.get(path) || (manifest.files[path]?.h ? path + '?v=' + manifest.files[path].h : './' + path.replace(/^\//,''));
@@ -50,14 +51,18 @@
    const style = /\.css$/.test(path);
    if (style && css.has(path)) return Promise.resolve();
    if (!style && !/\.js$/.test(path)) return Promise.resolve(); // workers/imports/fonts are not page scripts
-    const task = new Promise((resolve, reject) => {
+    const loadOnce = () => new Promise((resolve, reject) => {
      const node = doc.createElement(style ? 'link' : 'script');
      const timer = setTimeout(() => { node.remove?.(); reject(new Error('Timed out loading ' + path)); }, 20000);
      if (style) { node.rel = 'stylesheet'; node.href = url(path); }
      else { node.async = false; node.src = url(path); }
-      node.onload = resolve;
+      node.onload = () => { clearTimeout(timer); resolve(); };
-      node.onerror = () => reject(new Error('Unable to load ' + path));
+      node.onerror = () => { clearTimeout(timer); node.remove?.(); reject(new Error('Unable to load ' + path)); };
      doc.head.append(node);
    });
    const task = root.AsyncGuard?.retry
      ? root.AsyncGuard.retry(loadOnce, { attempts: 3 })
      : loadOnce();
    assets.set(path, task);
    task.catch(() => assets.delete(path));
    return task;
@@ -100,9 +105,17 @@
      else root.navigator.serviceWorker?.getRegistration().then(send).catch(()=>{});
    },
    warm() {
-      if(root.navigator.connection?.saveData || !root.navigator.serviceWorker) return;
+      if (warmScheduled || !root.navigator.serviceWorker || root.navigator.onLine === false) return;
-      const idle = root.requestIdleCallback || (fn => root.setTimeout(fn,1000));
+      warmScheduled = true;
-      idle(()=>root.navigator.serviceWorker.ready.then(reg=>reg.active?.postMessage({type:'WARM_ASSETS',saveData:!!root.navigator.connection?.saveData})).catch(()=>{}));
+      const start = () => {
        warmScheduled = false;
        if(root.navigator.onLine === false)return;
        root.navigator.serviceWorker.ready.then(reg => {
          for (const worker of new Set([reg.active, reg.waiting])) worker?.postMessage({type:'COMPLETE_ASSETS'});
        }).catch(()=>{});
      };
      if (root.requestIdleCallback) root.requestIdleCallback(start, { timeout: 8000 });
      else setTimeout(start, 5000);
    },
    onLoad(name, fn) {
      if(api.loaded(name)) { Promise.resolve().then(fn).catch(error=>{if(root.CustomEvent)root.dispatchEvent?.(new root.CustomEvent('ytp-lazy-error',{detail:{group:name,error}}));}); return; }
@@ -122,12 +135,32 @@
      for (const type of ['pointerenter', 'focus', 'touchstart']) element.addEventListener(type, () => load(name).catch(() => {}), { once: true, passive: true });
    },
  };
  // Own this response once. Classic-script and fetch preloads do not share
  // their cached bodies in WebKit; the later bootstrap consumes this promise.
  const agent=root.navigator.userAgent || '';
  api.captureApp=!!(manifest.appCache && !root.navigator.serviceWorker?.controller && root.crypto?.subtle && /AppleWebKit\//.test(agent) && !/(?:Chrome|Chromium|Edg|OPR)\//.test(agent));
  if(api.captureApp) {
    api.appResponse=(async()=>{
      const key=url('/app.js');
      try {
        const cache=await root.caches?.open('ytplayer-assets'), held=await cache?.match(key);
        if(held?.headers.get('X-Asset-Hash')===manifest.files['/app.js']?.h && held)return held;
      } catch {}
      return root.fetch(key,{credentials:'same-origin'});
    })();
    api.appResponse.catch(()=>{});
  } else if(manifest.appCache) {
    // Preserve native script/code-cache reuse in engines without the WebKit gap.
    const preload=doc.createElement('link');preload.rel='preload';preload.as='script';preload.fetchPriority='low';preload.href=url('/app.js');doc.head.append(preload);
  }
  root.Lazy = api;
  root.navigator.serviceWorker?.addEventListener('message',event=>{
    if(event.data?.type==='ASSET_LAYOUT_REQUEST') event.source?.postMessage({type:'LAYOUT',value:api.layout});
    if(event.data?.type==='SW_UPDATE_AVAILABLE') api.warm();
  });
  root.navigator.serviceWorker?.addEventListener('controllerchange',()=>{api.reportLayout();api.warm();});
  root.addEventListener?.('online',()=>api.warm());
  api.warm();
  let settings={};
  try { settings=JSON.parse(root.localStorage.getItem('_ytpdata') || '{}').settings || {}; api.layout=settings.layout || 'classic'; } catch {}
  Object.assign(doc.documentElement.dataset,{layout:api.layout,theme:settings.theme || 'dark',font:settings.fontScale || 'normal',density:settings.density || 'comfortable',perf:settings.perfMode?'on':'off',motion:settings.reduceMotion?'reduced':'full'});
--- a/frontend/lazy.test.js
+++ b/frontend/lazy.test.js
@@ -2,16 +2,16 @@ const { test } = require('node:test');
 const assert = require('node:assert/strict');
 const { readFileSync } = require('node:fs');
 const vm = require('node:vm');
-function fixture(current, held = []) {
+function fixture(current, held = [], appCache = false, userAgent = 'AppleWebKit/605.1 Safari/605.1', controlled = false) {
-  const inserted = [], listeners = {}, writes = [];
+  const inserted = [], listeners = {}, writes = [], fetched = [];
-  const manifest = { buildTag: 'own', groups: { core: { files: [] }, 'layout:classic': { files: ['/classic.css'] }, 'layout:glass-stage': { files: ['/glass.css', '/one.js', '/two.js'] }, 'feature:test': { contract:1, files: ['/one.js', '/two.js'] } }, files: { '/classic.css': {h:'c'}, '/glass.css':{h:'g'}, '/one.js':{h:'1'}, '/two.js':{h:'2'} } };
+  const manifest = { buildTag: 'own', appCache, groups: { core: { files: [] }, 'layout:classic': { files: ['/classic.css'] }, 'layout:glass-stage': { files: ['/glass.css', '/one.js', '/two.js'] }, 'feature:test': { contract:1, files: ['/one.js', '/two.js'] } }, files: { '/app.js':{h:'a'}, '/classic.css': {h:'c'}, '/glass.css':{h:'g'}, '/one.js':{h:'1'}, '/two.js':{h:'2'} } };
  const doc = { readyState:'loading', documentElement: { dataset:{} }, getElementById: () => ({ textContent:JSON.stringify(manifest) }), querySelectorAll: () => [], createElement: tag => ({ tagName:tag.toUpperCase() }), write: value => writes.push(value), addEventListener: (t,f) => listeners[t]=f };
  doc.head = { append: node => { inserted.push(node); queueMicrotask(() => node.onload?.()); } };
-  const root = { document:doc, localStorage:{ getItem:() => '{"settings":{"layout":"glass-stage"}}' }, console, Promise, URL, setTimeout, clearTimeout, navigator:{}, addEventListener(){} };
+  const root = { document:doc, localStorage:{ getItem:() => '{"settings":{"layout":"glass-stage"}}' }, console, Promise, URL, crypto:{subtle:{}}, AsyncGuard:require('./async-guard'), requestIdleCallback:fn=>{root.__idle=fn;}, fetch:async key=>{fetched.push(key);return new Response('app');}, setTimeout, clearTimeout, navigator:{userAgent,serviceWorker:{ready:Promise.resolve({}),controller:controlled?{}:null,addEventListener(){}}}, addEventListener(){} };
  if (current) root.caches = { open: async () => ({ match: async key => key === '/__ytp_asset_state' ? new Response(JSON.stringify({current})) : held.includes(key) ? new Response('', {headers:{'X-Asset-Hash':key.split('=')[1]}}) : undefined }) };
  root.window=root; root.globalThis=root;
  vm.runInNewContext(readFileSync(require.resolve('./lazy.js'),'utf8'), root);
-  return { root, inserted, writes, listeners, manifest };
+  return { root, inserted, writes, listeners, manifest, fetched };
 }
 test('external head bootstrap selects remembered CSS before paint without fetching a manifest', () => {
  const {root,writes}=fixture();
@@ -27,11 +27,13 @@ test('lazy groups execute ordered classic scripts once, sharing concurrent calls
  await root.Lazy.load('layout:glass-stage');
  assert.equal(inserted.filter(n=>n.tagName==='SCRIPT').length,2);
 });
-test('failed injection can retry and proxy dispatches only after execution', async () => {
+test('transient script injection failure retries before proxy dispatch', async () => {
  const {root,inserted}=fixture();
  const append=root.document.head.append;
-  root.document.head.append=n=>{inserted.push(n);queueMicrotask(()=>n.onerror?.());};
+  let first=true;
-  await assert.rejects(root.Lazy.load('feature:test'),/one.js/);
+  root.document.head.append=n=>{inserted.push(n);queueMicrotask(()=>{if(first){first=false;n.onerror?.();}else n.onload?.();});};
  await root.Lazy.load('feature:test');
  assert.equal(inserted.length,3,'first file is retried, then the second file loads');
  root.document.head.append=append;
  root.TestApi={open:value=>value+1};
  const proxy=root.Lazy.proxy('feature:test',['open'],'TestApi');
@@ -84,3 +86,44 @@ test('classic chunk registry proxies use window.YT and keep the executed singlet
 const singleton=root.YT.TestApi;await root.Lazy.load('feature:test');
 assert.equal(root.YT.TestApi,singleton);assert.equal(inserted.length,2);
 });
 test('online launches request worker completion even with Save-Data and skip offline messages',async()=>{
 const f=fixture(),sent=[];
 const active={postMessage:m=>sent.push(m)},waiting={postMessage:m=>sent.push(m)};
 f.root.navigator.connection={saveData:true};f.root.navigator.onLine=true;
 f.root.navigator.serviceWorker={ready:Promise.resolve({active,waiting})};
 f.root.Lazy.warm();await Promise.resolve();
 assert.equal(sent.length,0,'warming waits until the page is idle');
 f.root.__idle();await Promise.resolve();
 assert.deepEqual(sent.map(m=>m.type),['COMPLETE_ASSETS','COMPLETE_ASSETS']);
 f.root.navigator.onLine=false;f.root.Lazy.warm();await Promise.resolve();assert.equal(sent.length,2);
 });
 test('server-enabled head capture owns exactly one app response; native and rollback do not fetch',async()=>{
 const modern=fixture(null,[],true);await modern.root.Lazy.appResponse;
 assert.deepEqual(modern.fetched,['/app.js?v=a']);
 const legacy=fixture();assert.deepEqual(legacy.fetched,[]);assert.equal(legacy.root.Lazy.appResponse,undefined);
 });
 test('head capture is cache-first even before a worker controls the page',async()=>{
 const f=fixture(fixture().manifest,['/app.js?v=a'],true);const response=await f.root.Lazy.appResponse;
 assert.equal(response.headers.get('X-Asset-Hash'),'a');assert.deepEqual(f.fetched,[]);
 });
 test('Chromium retains native script loading and only preloads the current app URL',async()=>{
 const f=fixture(null,[],true,'AppleWebKit/537.36 Chrome/140.0 Safari/537.36');
 assert.equal(f.root.Lazy.captureApp,false);assert.equal(f.root.Lazy.appResponse,undefined);assert.deepEqual(f.fetched,[]);
 assert.equal(f.inserted.length,1);assert.equal(f.inserted[0].rel,'preload');assert.equal(f.inserted[0].as,'script');assert.equal(f.inserted[0].href,'/app.js?v=a');assert.equal(f.inserted[0].fetchPriority,'low');
 });
 test('iOS Chromium-branded browsers still use their WebKit response capture',async()=>{
 const f=fixture(null,[],true,'AppleWebKit/605.1 CriOS/140.0 Mobile Safari/605.1');await f.root.Lazy.appResponse;
 assert.equal(f.root.Lazy.captureApp,true);assert.deepEqual(f.fetched,['/app.js?v=a']);
 });
 test('controlled WebKit visits use worker-cached native app scripts without a response handoff',async()=>{
 const f=fixture(null,[],true,'AppleWebKit/605.1 Safari/605.1',true);
 assert.equal(f.root.Lazy.captureApp,false);assert.equal(f.root.Lazy.appResponse,undefined);assert.deepEqual(f.fetched,[]);
 assert.equal(f.inserted[0].as,'script');assert.equal(f.inserted[0].href,'/app.js?v=a');assert.equal(f.inserted[0].fetchPriority,'low');
 });
--- a/frontend/lyrics-window.js
+++ b/frontend/lyrics-window.js
@@ -16,10 +16,19 @@
        for (const link of root.document.querySelectorAll('link[rel="stylesheet"]')) { const copy = doc.createElement('link'); copy.rel = 'stylesheet'; copy.href = link.href; doc.head.append(copy); }
        const style = doc.createElement('style'); style.textContent = 'body{margin:0;background:var(--bg,#151719);color:var(--text,#fff);display:flex;flex-direction:column;height:100vh;overflow:hidden}.lyrics-floating-view{position:relative!important;inset:auto!important;flex:1;min-height:0;display:flex!important;flex-direction:column!important;width:100%!important}.lyrics-floating-view .sl-list{flex:1;min-height:0;height:auto!important}.lyrics-floating-controls{display:flex;gap:8px;padding:12px}.lyrics-floating-controls button{flex:1;min-height:48px;background:var(--bg-2,#25292d);color:inherit;border:1px solid var(--line,#555);border-radius:8px}'; doc.head.append(style);
        const view = adapter.view(), marker = root.document.createComment('floating lyrics'); view.before(marker); view.classList.add('lyrics-floating-view'); doc.body.append(view);
        doc.body.append(root.document.querySelector('#transport-play').ownerSVGElement.cloneNode(true));
        const controls = doc.createElement('div'); controls.className = 'lyrics-floating-controls';
-        for (const [label, action] of [['Play / Pause', adapter.toggle], ['Next', adapter.next]]) { const b = doc.createElement('button'); b.type = 'button'; b.textContent = label; b.onclick = action; controls.append(b); } doc.body.append(controls);
+        for (const [kind, label, action] of [['play', 'Play', adapter.toggle], ['next', 'Next', adapter.next]]) { const b = doc.createElement('button'); b.type = 'button'; root.TransportIcons.set(b,kind,label); b.onclick = action; controls.append(b); } doc.body.append(controls);
        const repaint = () => {
          doc.documentElement.dataset.layout=root.document.documentElement.dataset.layout; doc.documentElement.dataset.theme=root.document.documentElement.dataset.theme;
          const kind=root.document.querySelector('#playBtn .transport-icon')?.dataset.transportIcon || 'play';
          root.TransportIcons.set(controls.firstElementChild,kind);
        };
        const transportObserver=new root.MutationObserver(repaint);
        transportObserver.observe(root.document.getElementById('playBtn'),{childList:true});
        transportObserver.observe(root.document.documentElement,{attributes:true,attributeFilter:['data-layout','data-theme']}); repaint();
        const win = pipWindow; let restored = false;
-        cleanup = () => { if (restored) return; restored = true; marker.replaceWith(view); view.classList.remove('lyrics-floating-view'); pipWindow = null; adapter.refresh(); if (!win.closed) win.close(); };
+        cleanup = () => { if (restored) return; restored = true; transportObserver.disconnect(); marker.replaceWith(view); view.classList.remove('lyrics-floating-view'); pipWindow = null; adapter.refresh(); if (!win.closed) win.close(); };
        win.addEventListener('pagehide', cleanup, { once: true }); win.addEventListener('resize', adapter.refresh); adapter.refresh();
      } else {
        const canvas = root.document.createElement('canvas'); canvas.width = 840; canvas.height = 500; const ctx = canvas.getContext('2d');
--- a/frontend/media-icons.test.js
+++ b/frontend/media-icons.test.js
@@ -0,0 +1,19 @@
 const test = require('node:test');
 const assert = require('node:assert/strict');
 const { readdirSync, readFileSync } = require('node:fs');
 const { join } = require('node:path');
 test('download and offline icons never use emoji or text glyphs', () => {
  // Arrow keys are prose, not action icons. Exact lines prevent new exceptions.
  const allow = new Map([
    ['index.html', new Set(['<div class="shortcut-row"><kbd>↑</kbd><kbd>↓</kbd><span>Volume up / down</span></div>'])],
    ['admin.html', new Set(['<span class="muted" style="font-size:12.5px">Shortcuts: <code>Space</code> stamp (Tap-sync) · <code>S</code> stamp selected · <code>K</code> play · <code>↑↓</code> select · <code>⌘/Ctrl S</code> save</span>'])],
  ]);
  const failures=[];
  for (const file of readdirSync(__dirname).filter(f=>/\.(js|html|css)$/.test(f) && !f.endsWith('.test.js'))) {
    readFileSync(join(__dirname,file),'utf8').split('\n').forEach((line,i)=>{
      if (/[⬇⤓⇩💾📥↓]/u.test(line) && !allow.get(file)?.has(line.trim())) failures.push(`${file}:${i+1}`);
    });
  }
  assert.deepEqual(failures,[]);
 });
--- a/frontend/remote-client.js
+++ b/frontend/remote-client.js
@@ -293,7 +293,7 @@
      <div class="rh-body"></div>
      <label class="rh-name-row">This screen's name <input class="rh-name" maxlength="40" /></label>
      <div class="rh-buttons">
-        <button class="np-btn" type="button" data-act="start">▶ Start — control from a phone</button>
+        <button class="np-btn" type="button" data-act="start">${TransportIcons.svg('play')} Start — control from a phone</button>
        <button class="np-btn" type="button" data-act="code">↻ New code</button>
        <button class="np-btn" type="button" data-act="unpair">Unpair all phones</button>
        <button class="np-btn" type="button" data-act="stop">Stop</button>
@@ -414,14 +414,14 @@
    $('rvTitle').textContent = v ? v.title : 'Nothing playing';
    $('rvChannel').textContent = v ? v.channel : '';
    let directPlay = $('rvDirectPlay');
-    if (!directPlay) { directPlay = document.createElement('button'); directPlay.id = 'rvDirectPlay'; directPlay.className = 'np-btn'; directPlay.style.minHeight = '44px'; directPlay.textContent = 'Play here from paired screen'; $('rvChannel').after(directPlay); }
+    if (!directPlay) { directPlay = document.createElement('button'); directPlay.id = 'rvDirectPlay'; directPlay.className = 'np-btn'; directPlay.style.minHeight = '44px'; directPlay.innerHTML = TransportIcons.svg('play') + ' Play here from paired screen'; $('rvChannel').after(directPlay); }
    directPlay.hidden = !v || !s.directAvailable || !DirectMedia.enabled();
    directPlay.onclick = () => v && playVideoAt({ ...v, duration: s.dur || 0 }, liveCur());
    const thumb = $('rvThumb');
    if (v && v.thumbnail) { if (thumb.getAttribute('src') !== v.thumbnail) thumb.src = v.thumbnail; thumb.classList.remove('hidden'); }
    else thumb.classList.add('hidden');
-    $('rvToggle').textContent = s && !s.paused ? '⏸' : '▶';
+    TransportIcons.set($('rvToggle'), s && !s.paused ? 'pause' : 'play');
    $('rvDur').textContent = clock((s && s.dur) || 0);
    if (!rc.volTimer && document.activeElement !== $('rvVolume')) {
      const pct = Math.round(((s && s.volume) ?? 1) * 100);
--- a/frontend/saved-page.css
+++ b/frontend/saved-page.css
@@ -2,9 +2,10 @@
 .saved-storage-text { min-width:0; color:var(--text-2); font-size:14px; font-variant-numeric:tabular-nums; }
 .saved-clear { flex:none; min-height:44px; padding:0 10px; border:0; background:transparent; color:var(--accent); font:inherit; cursor:pointer; }
 html[data-layout] .card.saved-card { display:grid; grid-template-columns:72px minmax(0,1fr) 96px; align-items:center; gap:12px; min-height:88px; }
-html[data-layout] .saved-card .thumb { grid-column:1; grid-row:1; width:72px; }
+html[data-layout] #cards .saved-card .thumb { grid-column:1; grid-row:1; width:100%; min-width:0; max-width:100%; flex:none; overflow:hidden; }
 html[data-layout] #cards .saved-card .thumb img { width:100%; max-width:100%; height:100%; object-fit:cover; }
 html[data-layout] .saved-card .card-info { grid-column:2; grid-row:1; min-width:0; }
-html[data-layout] .saved-card .card-title { display:-webkit-box; -webkit-box-orient:vertical; -webkit-line-clamp:2; overflow:hidden; overflow-wrap:anywhere; }
+html[data-layout] .saved-card .card-title { display:-webkit-box; -webkit-box-orient:vertical; -webkit-line-clamp:2; overflow:hidden; overflow-wrap:anywhere; text-overflow:ellipsis; }
 html[data-layout] .saved-file-actions { grid-column:3; grid-row:1; display:flex; align-items:center; gap:8px; }
 .saved-file-action { width:44px; height:44px; min-width:44px; padding:10px; border:1px solid var(--line); border-radius:var(--radius-sm,8px); background:var(--bg-2); color:var(--text-2); cursor:pointer; }
 .saved-file-action svg { display:block; width:22px; height:22px; }
@@ -13,4 +14,4 @@ html[data-layout] .saved-file-actions { grid-column:3; grid-row:1; display:flex;
 .saved-file-action.danger:hover, .saved-clear:hover { color:var(--accent); }
 .saved-file-action:focus-visible, .saved-clear:focus-visible { outline:2px solid var(--accent); outline-offset:3px; }
 .saved-file-action:disabled, .saved-clear:disabled { opacity:.5; cursor:wait; }
-@media(min-width:900px) { html[data-layout] .card.saved-card { grid-template-columns:88px minmax(0,1fr) 96px; } html[data-layout] .saved-card .thumb { width:88px; } }
+@media(min-width:900px) { html[data-layout] .card.saved-card { grid-template-columns:88px minmax(0,1fr) 96px; } }
--- a/frontend/saved-page.js
+++ b/frontend/saved-page.js
@@ -3,14 +3,14 @@
  'use strict';
  const matches = (video, query) => !query || `${video.title || video.id} ${video.channel || ''}`.toLowerCase().includes(query.toLowerCase());
  const paths = {
-    export: '<path d="M12 3v12m-5-5 5 5 5-5M4 17v4h16v-4"/>',
+    export: '<use href="#media-download"/>',
    delete: '<path d="M4 7h16M9 7V4h6v3M6 7l1 13h10l1-13M10 11v6M14 11v6"/>'
  };
  function button(doc, kind, label, action) {
    const b = doc.createElement('button'); b.type = 'button';
    b.className = `saved-file-action${kind === 'delete' ? ' danger' : ''}`;
    b.setAttribute('aria-label', label); b.title = label;
-    b.innerHTML = `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">${paths[kind]}</svg>`;
+    b.innerHTML = `<svg class="media-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">${paths[kind]}</svg>`;
    b.onclick = e => { e.stopPropagation(); action(); }; return b;
  }
  function actions(row, video, exportFile, deleteFile) {
--- a/frontend/section-rail.js
+++ b/frontend/section-rail.js
@@ -245,3 +245,77 @@ const SectionRail = (() => {
  return { boot, refresh, setFolded, isFolded };
 })();
 /* Cache the single page-owned app response before it registers the worker. */
 (function (root) {
  'use strict';
  const doc=root.document, manifest=root.Lazy.manifest, key=root.Lazy.url('/app.js');
  let domReady=doc.readyState==='complete', appSawDom=false;
  doc.addEventListener('DOMContentLoaded',()=>{domReady=true;appSawDom=typeof root.boot==='function';},{once:true});
  function execute(node) {
    doc.head.append(node);
    node.remove();
    delete root.Lazy.appResponse;
    // app.js keeps its original DOMContentLoaded listener. Async response
    // consumption can finish after that event; boot exactly once in that case.
    if(domReady)root.boot();
  }
  async function external(url) {
    await new Promise((resolve,reject)=>{
      const node=doc.createElement('script');node.src=url;
      node.onload=()=>{if(domReady&&!appSawDom)root.boot();resolve();};node.onerror=()=>reject(Error('Unable to load player'));
      doc.head.append(node);
    });
  }
  function native() {
    if(doc.readyState!=='loading' || !doc.currentScript)return external(key);
    return new Promise((resolve,reject)=>{
      doc.addEventListener('DOMContentLoaded',()=>typeof root.boot==='function'?resolve():reject(Error('Unable to load player')),{once:true});
      const escaped=key.replaceAll('&','&amp;').replaceAll('"','&quot;').replaceAll('<','&lt;');
      doc.write('<script src="'+escaped+'"></script>');
    });
  }
  async function verified(response, expected) {
    const bytes=await response.clone().arrayBuffer();
    const digest=new Uint8Array(await root.crypto.subtle.digest('SHA-256',bytes));
    const hex=Array.from(digest,b=>b.toString(16).padStart(2,'0')).join('');
    if(hex.slice(0,10)!==expected)throw Error('Player body hash mismatch');
    return {bytes,digest};
  }
  async function start() {
    if(!manifest.appCache || !root.crypto?.subtle || !root.Lazy.captureApp)return native();
    const expected=manifest.files['/app.js'].h;
    let cache;
    try { cache=await root.caches?.open('ytplayer-assets'); } catch {}
    let response=await cache?.match(key);
    if(!response || response.headers.get('X-Asset-Hash')!==expected) {
      try { response=await (root.Lazy.appResponse || root.fetch(key,{credentials:'same-origin'})); } catch {}
    }
    if(!response?.ok || response.headers.get('X-Asset-Hash')!==expected) {
      // Preserve staged N-1 boot after an individual cache eviction. Only the
      // controller can serve this old URL safely; never fetch stale URLs bare.
      const state=cache && await root.AssetSyncCore.state(cache);
      const previousKey=state && root.AssetSyncCore.fallback(manifest,state.previous,'/app.js');
      const previous=previousKey && await cache.match(previousKey);
      const previousHash=state?.previous?.files['/app.js']?.h;
      const contractsMatch=state?.previous && Object.entries(manifest.groups).every(([name,group])=>state.previous.groups[name]?.contract===group.contract);
      if(contractsMatch && root.navigator?.serviceWorker?.controller && previous?.ok && previous.headers.get('X-Asset-Hash')===previousHash) {
        await verified(previous,previousHash);
        delete root.Lazy.appResponse;
        return external(previousKey);
      }
      throw Error('Player asset hash mismatch');
    }
    const {bytes,digest}=await verified(response,expected);
    const permission="'sha256-"+root.btoa(String.fromCharCode(...digest))+"'";
    if(!doc.querySelector('meta[http-equiv="Content-Security-Policy"]').content.includes(permission))throw Error('Player body hash mismatch');
    // CacheStorage may share a full quota with saved music. Never remove data
    // to make room; boot from these verified bytes even if caching is refused.
    try { await cache?.put(key,response); } catch(error) { root.console.warn('[app-cache]',error.message); }
    const node=doc.createElement('script');node.textContent=new root.TextDecoder().decode(bytes);
    execute(node);
  }
  const ready=start();
  root.AppBootstrap={ready};
  ready.catch(error=>root.console.error('[app-cache]',error.message));
 })(typeof window!=='undefined'?window:globalThis);
--- a/frontend/settings-persist.test.js
+++ b/frontend/settings-persist.test.js
@@ -0,0 +1,37 @@
 const test = require('node:test');
 const assert = require('node:assert/strict');
 const fs = require('node:fs');
 const vm = require('node:vm');
 const source = fs.readFileSync(__dirname + '/app.js', 'utf8');
 // Exercise the production persistence/profile functions without starting a DOM player.
 const declaration = name => source.match(new RegExp('(?:async )?function ' + name + '\\([^]*?\\n}'))[0];
 function fixture(updatedAt) {
  const settings = { saveBeforePlay: true, autoPreload: true, layout: 'f7-swipe', eq: { preset: 'custom', g: [1,2,3,4,5] }, jamesDsp: { enabled: true, downloadForOffline: true, preset: 'warm', params: { 'eq.band0': 3 } } };
  const defaults = { saveBeforePlay: false, autoPreload: true, layout: 'classic', jamesDsp: { enabled: false, downloadForOffline: false, preset: 'flat', params: {} } };
  const context = vm.createContext({ WEB: true, data: { settings, profile: { name: 'test', syncedAt: 200 } }, DEFAULT_SETTINGS: defaults, API: { saveData: async () => {} }, profileHeaders: () => ({}), scheduleProfilePush: () => context.pushes++, pushes: 0, fetch: async () => ({ status: 200, json: async () => ({ ok: true, name: 'test', updatedAt, data: { settings: { saveBeforePlay: false } } }) }), localStorage: { getItem: () => JSON.stringify({ settings }) } });
  vm.runInContext([declaration('loadDataFromStorage'), declaration('normalizeJamesDspSettings'), declaration('applyProfileData'), declaration('pullProfileIfNewer')].join('\n'), context);
  return context;
 }
 test('stored settings load verbatim instead of reverting to defaults', () => {
  const c = fixture(100);
  const loaded = vm.runInContext('loadDataFromStorage()', c);
  assert.equal(loaded.settings.saveBeforePlay, true);
  assert.equal(loaded.settings.layout, 'f7-swipe');
  assert.deepEqual(JSON.parse(JSON.stringify(loaded.settings.eq.g)), [1,2,3,4,5]);
  assert.deepEqual(JSON.parse(JSON.stringify(loaded.settings.jamesDsp)), { enabled: true, downloadForOffline: true, preset: 'warm', params: { 'eq.band0': 3 } });
 });
 for (const updatedAt of [100,200]) test(`profile timestamp ${updatedAt} cannot overwrite local settings synced at 200`, async () => {
  const c = fixture(updatedAt), previous = c.data.settings;
  await vm.runInContext('pullProfileIfNewer()', c);
  assert.equal(c.data.settings, previous);
  assert.equal(c.pushes, 1);
 });
 test('newer profile intentionally replaces settings and restores missing defaults', async () => {
  const c = fixture(300);
  await vm.runInContext('pullProfileIfNewer()', c);
  assert.equal(c.data.settings.saveBeforePlay, false);
  assert.equal(c.data.settings.autoPreload, true);
  assert.equal(c.data.settings.layout, 'classic');
  assert.deepEqual(JSON.parse(JSON.stringify(c.data.settings.jamesDsp)), { enabled: false, downloadForOffline: false, preset: 'flat', params: {}, irRef: null });
  assert.equal(c.data.profile.syncedAt, 300);
 });
--- a/frontend/settings-sections.css
+++ b/frontend/settings-sections.css
@@ -1,4 +1,27 @@
 .settings-browser { display: block; width: 100%; min-width: 0; }
 .settings-browser, .settings-grid, .settings-overview, .settings-detail, .settings-section,
 .settings-browser .settings, .settings-browser .set-group, .settings-browser .dsp-settings,
 .settings-browser .dsp-subsection, .settings-browser .dsp-param-list {
  box-sizing: border-box;
  min-width: 0;
  max-width: 100%;
 }
 /* Settings is a workspace, not a sidebar: give the section browser the full
   content area on desktop instead of leaving it inside the fixed 452px list. */
 .body:has(#listPane .cards[data-view="settings"]) .player-pane { display: none; }
 .body:has(#listPane .cards[data-view="settings"]) #listPane {
  flex: 1 1 0;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  border-left: 0;
 }
 .body:has(#listPane .cards[data-view="settings"]) #listPane .cards {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  overflow-x: hidden;
 }
 .settings-browser [hidden] { display: none !important; }
 .settings-search { margin-bottom: 12px; }
 .settings-search input { width: 100%; min-height: 44px; background: var(--bg-2); color: var(--text); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; font: inherit; }
@@ -11,10 +34,81 @@
 .settings-section-row:hover, .settings-section-row[aria-current="true"] { background: var(--bg-3); border-radius: 8px; }
 .settings-browser :is(button,input,select,textarea):focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
 .settings-back { min-height: 44px; padding: 8px 12px; margin-bottom: 12px; background: var(--bg-2); color: var(--text); border: 1px solid var(--line); border-radius: 8px; font: inherit; cursor: pointer; }
-.settings-browser .set-row { min-height: 44px; }
+.settings-browser .set-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, min(40%, 260px));
  align-items: center;
  gap: 12px;
  min-height: 44px;
  min-width: 0;
  max-width: 100%;
 }
 .settings-browser .set-row > :is(span, input, select, button, output) { min-width: 0; max-width: 100%; }
 .settings-browser .set-row > :is(input, select, button, output) { box-sizing: border-box; }
 .settings-browser .set-control-wrap { display: block; width: 100%; min-width: 0; max-width: 100%; overflow: hidden; }
 #listPane #cards .settings-browser .set-row select,
 #listPane #cards .settings-browser .set-control-wrap select,
 .settings-browser .set-row select,
 .settings-browser .set-control-wrap select {
  box-sizing: border-box;
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-right: 28px;
  background-color: var(--bg-3);
  background-image: linear-gradient(45deg, transparent 50%, var(--text-dim) 50%), linear-gradient(135deg, var(--text-dim) 50%, transparent 50%);
  background-position: calc(100% - 14px) 50%, calc(100% - 9px) 50%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
  color: var(--text);
  border-color: var(--line);
 }
 .settings-browser .set-row > span:first-child { overflow-wrap: anywhere; }
 .settings-browser .set-row:has(> span:only-child) { grid-template-columns: minmax(0, 1fr); }
 .settings-browser .set-row small { font-size: 12px; max-width: 100%; }
 .settings-browser .set-row > span { min-width: 0; }
-.settings-browser .set-row input[type="range"] { max-width: 42%; }
+.settings-browser .set-row input[type="range"] { width: calc(100% - 16px); max-width: calc(100% - 16px); min-width: 0; }
 .settings-browser .set-row input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  justify-self: end;
  width: 46px;
  height: 28px;
  min-width: 46px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: radial-gradient(circle at 14px 50%, var(--text) 0 9px, transparent 10px), var(--bg-3);
  cursor: pointer;
  transition: background .16s ease, border-color .16s ease;
 }
 .settings-browser .set-row input[type="checkbox"]:checked {
  border-color: var(--accent);
  background: radial-gradient(circle at 32px 50%, var(--on-accent, #fff) 0 9px, transparent 10px), var(--accent);
 }
 .settings-browser .set-row input[type="checkbox"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
 .dsp-file-control {
  position: relative;
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  align-items: center;
  gap: 9px;
  width: 100%;
  min-width: 0;
  max-width: 100%;
 }
 .dsp-file-control input[type="file"] { position: absolute; width: 1px; height: 1px; min-width: 0; max-width: 1px; padding: 0; border: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
 .dsp-file-control:focus-within { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 8px; }
 .dsp-file-button { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 7px 12px; border: 1px solid var(--line); border-radius: 9px; background: var(--bg-3); color: var(--text); font: 600 12px var(--ui); white-space: nowrap; }
 .dsp-file-name { display: block; min-width: 0; overflow: hidden; color: var(--text-2); text-overflow: ellipsis; white-space: nowrap; font-size: 12px; }
 .dsp-subsection .sp-note { min-width: 0; max-width: 100%; overflow-wrap: anywhere; }
 .dsp-subsection > .btn { min-width: 0; max-width: 100%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
 .dsp-actions { min-width: 0; max-width: 100%; }
 .dsp-param-list { grid-template-columns: repeat(auto-fit, minmax(min(190px, 100%), 1fr)); }
 .dsp-param-row input[type="range"] { width: calc(100% - 16px); min-width: 0; max-width: calc(100% - 16px); }
 .settings-browser .settings-detail { display: none; min-width: 0; }
 .settings-browser[data-detail="1"] .settings-overview { display: none; }
 .settings-browser[data-detail="1"] .settings-detail { display: block; }
@@ -22,7 +116,7 @@
  .settings-grid { display: grid; grid-template-columns: minmax(160px, .8fr) minmax(0, 1.4fr); gap: 16px; }
  .settings-browser .settings-overview, .settings-browser[data-detail="1"] .settings-overview, .settings-browser .settings-detail { display: block; }
  .settings-back { display: none; }
-  .settings-browser .set-row { flex-wrap: wrap; gap: 12px; }
+  .settings-browser .set-row { flex-wrap: nowrap; gap: 12px; }
 }
 .download-job { padding: 14px 0; border-bottom: 1px solid var(--line); display: grid; gap: 8px; }
 .download-job b { overflow-wrap: anywhere; }
--- a/frontend/share-external.js
+++ b/frontend/share-external.js
@@ -71,7 +71,7 @@
          const url = URL.createObjectURL(gifBlob);
          const name = `${(meta.title || meta.id).replace(/[^\w\- ]+/g, '').trim().slice(0, 40) || meta.id}-${Math.floor(cur())}s.gif`;
          out.innerHTML = `<img class="sm-preview" alt="GIF preview" src="${url}" />
-            <div class="sm-gif-actions"><a class="np-btn" href="${url}" download="${escapeHtml(name)}">⤓ Download</a>
+            <div class="sm-gif-actions"><a class="np-btn" href="${url}" download="${escapeHtml(name)}">${MediaIcons.svg('download')} Download</a>
            ${navigator.canShare && navigator.canShare({ files: [new File([gifBlob], name, { type: 'image/gif' })] }) ? '<button class="np-btn" type="button" data-act="sharegif">↗ Share GIF</button>' : ''}</div>`;
          out.dataset.name = name;
        } catch (err) {
@@ -98,7 +98,7 @@
          out.dataset.name = name;
          out.dataset.type = fmt === 'mp3' ? 'audio/mpeg' : 'audio/mp4';
          out.innerHTML = `<audio controls src="${url}" class="sm-audio"></audio>
-            <div class="sm-gif-actions"><a class="np-btn" href="${url}" download="${escapeHtml(name)}">⤓ Download</a>
+            <div class="sm-gif-actions"><a class="np-btn" href="${url}" download="${escapeHtml(name)}">${MediaIcons.svg('download')} Download</a>
            ${navigator.canShare && navigator.canShare({ files: [new File([biteBlob], name, { type: out.dataset.type })] }) ? '<button class="np-btn" type="button" data-act="sharebite">↗ Share</button>' : ''}</div>
            ${fmt === 'm4r' ? '<p class="sp-note">iPhone: share it to GarageBand (or drag into Finder with the phone connected) to set it as a ringtone.</p>' : ''}`;
        } catch (err) {
@@ -176,7 +176,7 @@
    showModal('📺 Open in another player', body, [{ label: 'Close', primary: true, onClick: closeModal }]);
    const ok = await cached(meta.id);
    if (!ok) {
-      body.innerHTML = `<p class="modal-text">The server hasn't finished caching this video yet, and other players need that single-file copy. Keep it playing for a minute (or tap ⬇ Save), then try again.</p>`;
+      body.innerHTML = `<p class="modal-text">The server hasn't finished caching this video yet, and other players need that single-file copy. Keep it playing for a minute (or tap ${MediaIcons.svg('download')} Save), then try again.</p>`;
      return;
    }
    const url = streamUrl(meta.id);
@@ -186,15 +186,15 @@
      <div class="sm-link"><span>Stream</span><code>${escapeHtml(url)}</code><button class="np-btn" type="button" data-act="copy">Copy</button></div>
      <div class="ext-buttons">
        ${isAndroid ? `
-          <a class="np-btn" href="${escapeHtml(intent(url, title, 'org.videolan.vlc'))}">▶ VLC</a>
+          <a class="np-btn" href="${escapeHtml(intent(url, title, 'org.videolan.vlc'))}">${TransportIcons.svg('play')} VLC</a>
-          <a class="np-btn" href="${escapeHtml(intent(url, title, 'com.mxtech.videoplayer.ad'))}">▶ MX Player</a>
+          <a class="np-btn" href="${escapeHtml(intent(url, title, 'com.mxtech.videoplayer.ad'))}">${TransportIcons.svg('play')} MX Player</a>
-          <a class="np-btn" href="${escapeHtml(intent(url, title))}">▶ Open with…</a>`
+          <a class="np-btn" href="${escapeHtml(intent(url, title))}">${TransportIcons.svg('play')} Open with…</a>`
        : isIOS ? `
-          <a class="np-btn" href="vlc-x-callback://x-callback-url/stream?url=${encodeURIComponent(url)}">▶ VLC</a>
+          <a class="np-btn" href="vlc-x-callback://x-callback-url/stream?url=${encodeURIComponent(url)}">${TransportIcons.svg('play')} VLC</a>
-          <a class="np-btn" href="infuse://x-callback-url/play?url=${encodeURIComponent(url)}">▶ Infuse</a>`
+          <a class="np-btn" href="infuse://x-callback-url/play?url=${encodeURIComponent(url)}">${TransportIcons.svg('play')} Infuse</a>`
-        : `<a class="np-btn" href="vlc://${escapeHtml(url)}">▶ VLC</a>`}
+        : `<a class="np-btn" href="vlc://${escapeHtml(url)}">${TransportIcons.svg('play')} VLC</a>`}
-        <button class="np-btn" type="button" data-act="m3u">⤓ .m3u (this video)</button>
+        <button class="np-btn" type="button" data-act="m3u">${MediaIcons.svg('download')} .m3u (this video)</button>
-        ${inList ? '<button class="np-btn" type="button" data-act="m3u-list">⤓ .m3u (whole list)</button>' : ''}
+        ${inList ? `<button class="np-btn" type="button" data-act="m3u-list">${MediaIcons.svg('download')} .m3u (whole list)</button>` : ''}
      </div>
      <p class="sp-note">${isAndroid ? 'VLC / MX Player must be installed; “Open with…” shows every video app.'
        : isIOS ? 'Needs the VLC (or Infuse) app. The link streams from your server; nothing is downloaded first.'
--- a/frontend/shell-consistency.test.js
+++ b/frontend/shell-consistency.test.js
@@ -32,7 +32,7 @@ test('assets.json describes the complete existing shell exactly once with eager
  const { groups } = JSON.parse(readFileSync(join(__dirname, 'assets.json'), 'utf8'));
  const described = new Set();
  for (const [name, group] of Object.entries(groups)) {
-    assert.equal(group.contract, 1, `${name} initial contract`);
+    assert.equal(group.contract, name === 'core' ? 2 : 1, `${name} contract (core boot packing changed)`);
    assert.equal(typeof group.eager, 'boolean');
    for (const asset of group.files) {
      assert.ok(!described.has(asset), `${asset} has one group`);
@@ -42,7 +42,9 @@ test('assets.json describes the complete existing shell exactly once with eager
  }
  for (const asset of shell) if (asset !== '/') assert.ok(described.has(asset), `${asset} is described`);
  // piano-engine is dynamically imported and historically absent from SHELL.
-  for (const asset of described) assert.ok(listed.has(asset) || asset === '/piano-engine.mjs', `${asset} shell or documented dynamic import`);
+  // Piano and JamesDSP load only through build-local dynamic module URLs.
  const dynamicOnly = new Set(['/piano-engine.mjs', ...groups['feature:jamesdsp'].files]);
  for (const asset of described) assert.ok(listed.has(asset) || dynamicOnly.has(asset), `${asset} shell or documented dynamic import`);
  assert.equal(groups.core.eager, true);
  for (const name of ['playlist', 'settings', 'service-mode', 'lyrics-editor']) {
    assert.equal(groups[`feature:${name}`].eager, true);
@@ -70,6 +72,8 @@ test('only core scripts and styles remain eager; native fallback and active layo
  const {groups}=JSON.parse(readFileSync(join(__dirname,'assets.json'),'utf8'));
  const background=new Set(Object.values(groups).filter(g=>g.background).flatMap(g=>g.files));
  for(const match of html.matchAll(/<(?:script\b[^>]*\bsrc|link\b[^>]*\bhref)="([^"]+)"/gi)) {
    // A style preload discovers bytes without applying or blocking another layout.
    if(match[0].includes('rel="preload"'))continue;
    const path='/'+match[1].replace(/^\//,'').split(/[?#]/)[0];
    assert.ok(!background.has(path),`${path} is not eager`);
  }
@@ -88,3 +92,33 @@ test('layout-independent visibility and transport defaults stay in eager CSS',()
 for(const selector of ['.stg-overlay','.deck-chips','.np-btn.done .i-save','.sleep-status .sl-ic','.ab-group','.mc-tune'])assert.ok(shared.includes(selector));
 assert.ok(html.includes('href="layout-base.css"'));
 });
 test('classic first-visit style preload is discovered before the head loader without applying another layout',()=>{
 const preload=html.match(/<link\b[^>]*rel="preload"[^>]*href="theme-classic.css"[^>]*as="style"[^>]*>/);
 assert.ok(preload,'classic stylesheet has an early preload');
 assert.ok(html.indexOf(preload[0])<html.indexOf('src="lazy.js"'));
 assert.ok(!/<link\b[^>]*rel="stylesheet"[^>]*href="theme-classic.css"/.test(html),'the selected layout remains parser-applied by the loader');
 });
 test('the last core script owns boot without an extra request or unsafe stale packing',()=>{
 const {groups}=JSON.parse(readFileSync(join(__dirname,'assets.json'),'utf8'));
 assert.equal(groups.core.contract,2,'old core packing cannot fall back without the loader');
 assert.ok(groups.core.files.includes('/app.js'));
 assert.ok(groups.core.files.includes('/section-rail.js'));
 assert.equal(groups.core.files.includes('/app-bootstrap.js'),false);
 assert.equal(listed.has('/app-bootstrap.js'),false);
 const scripts=[...html.matchAll(/<script src="([^"]+)"/g)].map(m=>m[1]);
 assert.equal(scripts.at(-1),'section-rail.js');
 assert.ok(html.includes("'sha256-__APP_SCRIPT_HASH__'"));
 assert.ok(readFileSync(join(__dirname,'section-rail.js'),'utf8').includes('root.AppBootstrap={ready}'));
 });
 test('runtime exclusion rules never remove shell or declared dynamic assets', async () => {
  const { isRuntimeAsset } = await import('../server/asset-manifest.js');
  const definition = JSON.parse(readFileSync(join(__dirname, 'assets.json'), 'utf8'));
  for (const asset of new Set([...shell.filter(p => p !== '/'), ...Object.values(definition.groups).flatMap(g => g.files)])) {
    assert.ok(isRuntimeAsset(asset, definition), `${asset} remains a runtime asset`);
  }
  for (const asset of ['/app.test.js', '/nested/probe.test.mjs', '/README.md', '/fonts/font-OFL.txt', '/admin.html', '/perf/fixture.js']) assert.equal(isRuntimeAsset(asset, definition), false, asset);
 });
--- a/frontend/shell-core.js
+++ b/frontend/shell-core.js
@@ -91,7 +91,7 @@ function renderSidebar() {
    let offlineBadge = '';
    if (stats.total > 0) {
      if (stats.cached === stats.total) {
-        offlineBadge = `<span class="pl-offline-badge all" title="Available offline">⬇</span>`;
+        offlineBadge = `<span class="pl-offline-badge all" title="Available offline">${MediaIcons.svg('offline')}</span>`;
      } else if (stats.cached > 0) {
        offlineBadge = `<span class="pl-offline-badge partial" title="${stats.cached} of ${stats.total} videos available offline">${stats.cached}/${stats.total}</span>`;
      }
@@ -141,7 +141,7 @@ function renderHomePlaylists() {
    let offlineHtml = '';
    if (stats.total > 0) {
      if (stats.cached === stats.total) {
-        offlineHtml = `<span class="home-pl-offline all" title="Available offline">⬇</span>`;
+        offlineHtml = `<span class="home-pl-offline all" title="Available offline">${MediaIcons.svg('offline')}</span>`;
      } else if (stats.cached > 0) {
        offlineHtml = `<span class="home-pl-offline partial" title="${stats.cached} of ${stats.total} videos available offline">${stats.cached}/${stats.total}</span>`;
      }
@@ -154,7 +154,7 @@ function renderHomePlaylists() {
        ${thumb ? `<img src="${escapeHtml(thumb)}" alt="" loading="lazy" decoding="async" />`
                : '<span class="home-pl-thumb-fallback">🎵</span>'}
        ${offlineHtml}
-        <span class="home-pl-play" title="Play all">▶</span>
+        <span class="home-pl-play" title="Play all">${TransportIcons.svg('play')}</span>
      </span>
      <span class="home-pl-name"></span>
      <span class="home-pl-count">${count} video${count === 1 ? '' : 's'}</span>`;
@@ -162,7 +162,7 @@ function renderHomePlaylists() {
    card.title = pl.name;
    card.addEventListener('click', () => { view = { type: 'playlist', id: pl.id }; render(); });
    card.querySelector('.home-pl-play').addEventListener('click', (e) => {
-      e.stopPropagation(); // the ▶ badge plays; the rest of the card opens the list
+      e.stopPropagation(); // the play badge plays; the rest of the card opens the list
      if (count) playFromList(pl.videos, 0, 'playlist:' + pl.id);
      else toast('That playlist is empty');
    });
@@ -261,6 +261,7 @@ function updateNowPlayingActions() {
  { const ch = $('npChannel'); if (ch) { const ok = isUploadId(id) || cachedIds.has(id); ch.classList.toggle('verified', ok); ch.title = ok ? 'Available on this device or the server' : ''; } }
  const btn = els.saveBtn;
  if (!btn) return;
  btn.classList.toggle('saving', downloading.has(id));
  if (removing.has(id)) {
    setTile(btn, 'Removing…');
    btn.classList.remove('done');
--- a/frontend/stats-view.js
+++ b/frontend/stats-view.js
@@ -49,7 +49,7 @@
          <div class="st-sub">${escapeHtml(deltaTxt)}${deltaTxt ? ' · ' : ''}${hrs(S.totalSec)} all time</div>
        </div>
        <div class="st-tile">
-          <div class="st-label">▶ Track plays</div>
+          <div class="st-label">${TransportIcons.svg('play')} Track plays</div>
          <div class="st-big">${S.totalPlays}</div>
          <div class="st-sub">${S.songsPlayed} song${S.songsPlayed === 1 ? '' : 's'} · ${playlistsWith} playlist${playlistsWith === 1 ? '' : 's'}</div>
        </div>
--- a/frontend/styles.css
+++ b/frontend/styles.css
@@ -273,7 +273,7 @@ body::after {
  background: linear-gradient(180deg, rgba(16,16,19,0.7), transparent);
  backdrop-filter: blur(8px);
 }
-.search-form { flex: 1; display: flex; gap: 10px; max-width: 760px; position: relative; }
+.search-form { flex: 1; display: flex; align-items: center; gap: 10px; max-width: 760px; position: relative; }
 /* Recent-searches dropdown — device-local, kept in localStorage (RecentSearches in app.js) */
 .search-recent {
@@ -752,7 +752,7 @@ input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.25); }
 }
 .np-btn:hover { color: var(--text); border-color: var(--accent); background: var(--bg-2); transform: translateY(-1px); }
 .np-btn:disabled { opacity: 0.6; cursor: default; transform: none; }
-.np-btn.done { color: #7ee0a8; border-color: rgba(126,224,168,0.35); }
+.np-btn.done { color: var(--accent-bright); border-color: var(--accent); }
 .np-title {
  font-family: var(--display);
  font-weight: 700;
@@ -1019,7 +1019,7 @@ input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.25); }
  box-shadow: 0 0 26px -12px var(--accent-glow);
 }
 .card.playing::after {
-  content: "▶ NOW PLAYING";
+  content: "NOW PLAYING";
  position: absolute; top: 9px; right: 44px;
  font-family: var(--mono); font-size: 8px; font-weight: 700;
  letter-spacing: 0.1em; color: var(--accent);
@@ -1097,19 +1097,20 @@ input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.25); }
  display: none;
  align-items: center; justify-content: center;
  width: 18px; height: 18px;
-  color: #7ee0a8;
+  color: var(--accent-bright);
  font-size: 12px; font-weight: 700;
  text-shadow: 0 1px 3px rgba(0,0,0,0.85);
 }
 .card.cached .saved-badge { display: flex; }
 .card.downloading .saved-badge {
  display: flex;
-  color: #ffc850;
+  color: var(--accent-bright);
  animation: pulse 1s ease-in-out infinite;
 }
-.card.downloading .saved-badge::before { content: "⏳"; }
+/* State changes reveal SVGs without rewriting badges or their handlers. */
-.card.downloading .saved-badge { font-size: 0; }
+.saved-badge .badge-progress { display:none; }
-.card.downloading .saved-badge::before { font-size: 12px; }
+.card.downloading .saved-badge .badge-offline { display:none; }
 .card.downloading .saved-badge .badge-progress { display:block; }
 .saved-badge .media-icon { width:16px; height:16px; filter:drop-shadow(0 1px 2px #000); }
 /* Download progress bar on card thumb */
 .dl-progress {
@@ -1158,6 +1159,15 @@ input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.25); }
 .set-row > span { display: flex; flex-direction: column; gap: 3px; color: var(--text); font-size: 13.5px; font-weight: 500; }
 .set-row small { color: var(--text-dim); font-size: 11.5px; font-weight: 400; line-height: 1.4; max-width: 280px; }
 .set-row input[type="range"] { width: 150px; }
 .dsp-settings { margin-top: 8px; padding: 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg-2); }
 .dsp-settings .set-group-title { padding: 0 0 8px; }
 .dsp-param-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 0 14px; }
 .dsp-param-row input[type="range"] { width: min(46vw, 190px); }
 .dsp-actions { display: flex; flex-wrap: wrap; gap: 8px; padding: 10px 0; }
 .dsp-actions .btn { color: var(--text); }
 .dsp-subsection { margin: 14px 0; padding: 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg-1); }
 .dsp-subsection h4 { margin: 0 0 8px; color: var(--text); }
 .dsp-risk { padding: 9px 11px; border-radius: 8px; color: var(--text); background: color-mix(in srgb, var(--accent) 13%, var(--bg-2)); font-size: .9em; }
 .set-row input[type="checkbox"] { width: 17px; height: 17px; accent-color: var(--accent); cursor: pointer; }
 .about-version { color: var(--text-dim); font-size: 12px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; user-select: text; }
 .set-select {
@@ -4257,6 +4267,30 @@ body.landscape-fs .player-stage { touch-action: none; } /* fullscreen (real or t
 .search-form { min-width: 0; }
 .search-form #searchInput { flex: 1 1 auto; min-width: 0; }
 /* Eager toolbar geometry: these buttons exist before Car mode is loaded. */
 .topbar :is(#voiceSearchBtn, #carModeBtn, #updateIconBtn) {
  flex: none;
  width: 44px; height: 44px; min-width: 44px; min-height: 44px;
  padding: 0;
  align-items: center; justify-content: center;
  display: inline-flex;
 }
 .topbar #updateIconBtn.hidden { display: none; }
 .topbar :is(#voiceSearchBtn, #carModeBtn) svg { width: 22px; height: 22px; flex: none; }
 .topbar :is(#voiceSearchBtn, #carModeBtn):hover { transform: none; }
@media (max-width: 430px) {
  html[data-layout] .topbar, html[data-layout] #searchForm { gap: 4px; }
  html[data-layout] #searchForm .search-btn { flex: none; padding-inline: 8px; }
  html[data-layout="f7-swipe"] #searchInput { padding-right: 6px; }
 }
@media (max-width: 860px) {
  html[data-layout="bento-hub"] .topbar {
    padding-top: calc(12px + env(safe-area-inset-top, 0px));
    padding-left: max(12px, env(safe-area-inset-left, 0px));
    padding-right: max(12px, env(safe-area-inset-right, 0px));
  }
 }
 /* iPhone/iPad: no double-tap page zoom (scrolling unaffected) */
 html.ios-nozoom, html.ios-nozoom body { touch-action: manipulation; }
@@ -4307,3 +4341,27 @@ html.ios-nozoom, html.ios-nozoom body { touch-action: manipulation; }
 .lyric-primary { white-space: pre-line; }
 .lyric-secondary { display: block; white-space: pre-line; font-size: .62em; font-weight: 450; line-height: 1.2; opacity: .68; margin-top: .15em; }
 /* Media icons share definitions and follow the active layout's stroke family. */
 .media-icon { display:inline-block; width:20px; height:20px; flex:none; vertical-align:middle; fill:none; stroke:currentColor; stroke-width:1.8; stroke-linecap:round; stroke-linejoin:round; pointer-events:none; }
 .media-nav-icon { width:20px; height:20px; }
 .empty-icon .media-icon { width:48px; height:48px; }
 :is(.pl-offline-badge,.home-pl-offline) .media-icon { width:14px; height:14px; }
 html[data-layout="classic"] .media-icon { stroke-width:1.8; }
 html[data-layout="f7-swipe"] .media-icon { stroke-width:2; }
 html[data-layout="glass-stage"] .media-icon { stroke-width:1.9; }
 html[data-layout="bento-hub"] .media-icon { stroke-width:1.8; }
 .np-btn .i-progress { display:none; }
 .np-btn.saving :is(.i-save,.i-done) { display:none; }
 .np-btn.saving .i-progress { display:inline; }
 :is([data-media-icon="progress"], .np-btn.saving .media-icon) { animation:mediaSpin 1s linear infinite; transform-origin:center; }
@keyframes mediaSpin { to { transform:rotate(360deg); } }
@media(prefers-reduced-motion:reduce) { :is([data-media-icon="progress"], .np-btn.saving .media-icon) { animation:none; } }
 .media-shape { display:none; }
 .media-shape-classic { display:inline; }
 html[data-layout="f7-swipe"] .media-shape-classic,
 html[data-layout="glass-stage"] .media-shape-classic,
 html[data-layout="bento-hub"] .media-shape-classic { display:none; }
 html[data-layout="f7-swipe"] .media-shape-f7-swipe,
 html[data-layout="glass-stage"] .media-shape-glass-stage,
 html[data-layout="bento-hub"] .media-shape-bento-hub { display:inline; }
--- a/frontend/sw-update.js
+++ b/frontend/sw-update.js
@@ -250,14 +250,15 @@
    // Opt-in: without an askStatus the download path runs exactly as before.
    // (It must never be implicit — a probe that waits on a reply would hang
    // forever if the caller injected a setTimeout that never fires.)
-    let precached = false;
+    let precached = false, offlineStatus;
    if (waiting && askStatus) {
      try {
        const status = await askStatus(waiting);
        precached = !!(status && status.ready);
        offlineStatus = status;
      } catch { precached = false; }
    }
-    if (onPhase) onPhase(precached ? 'ready' : 'downloading');
+    if (onPhase) onPhase(precached ? 'ready' : 'downloading', offlineStatus);
    if (!precached && refreshShell) await refreshShell();
    if (!guard()) throw new Error('Playing - update after this song / when paused');
@@ -280,7 +281,25 @@
    waiting.postMessage({ type: 'SKIP_WAITING' });
  }
-  const SwUpdate = { applyUpdate, refreshShellInPlace, askCacheStatus, BUST_PARAM };
+  function showOfflineStatus(status) {
    const el = root.document?.getElementById('offlineAssetStatus');
    if (el && typeof status?.total === 'number') {
      el.textContent = `${status.offlineReady ? 'Offline ready' : 'Preparing offline'} ${status.cached}/${status.total}`;
    } else if (el && typeof status?.ready === 'boolean') {
      el.textContent = status.ready ? 'Offline ready (legacy cache)' : 'Offline cache incomplete (legacy mode)';
    }
  }
  async function offlineStatus() {
    const registration = await root.navigator?.serviceWorker?.getRegistration();
    const status = await askCacheStatus(registration?.active);
    showOfflineStatus(status);
    return status;
  }
  root.navigator?.serviceWorker?.addEventListener?.('message', event => {
    if (event.data?.type === 'OFFLINE_STATUS') showOfflineStatus(event.data);
  });
  const SwUpdate = { offlineStatus, showOfflineStatus, applyUpdate, refreshShellInPlace, askCacheStatus, BUST_PARAM };
  if (typeof module !== 'undefined' && module.exports) {
    module.exports = SwUpdate;
--- a/frontend/sw-update.test.js
+++ b/frontend/sw-update.test.js
@@ -368,3 +368,22 @@ test('an unanswered worker status cannot fall through to an empty legacy refresh
 vm.runInNewContext(fs.readFileSync(__dirname+'/sw-update.js','utf8'),sandbox);
 await assert.rejects(sandbox.SwUpdate.refreshShellInPlace({cachesApi:{open:async()=>({}),keys:async()=>[]},fetchFn:async()=>({ok:true,json:async()=>({buildTag:'new'})}),isShellCache:()=>true}),/Worker update status unavailable/);
 });
 test('update readiness retains completion progress without blocking the ready fast path',async()=>{
 const phases=[],container=fakeContainer();let downloaded=false;
 const status={ready:true,offlineReady:false,cached:90,total:151,missingFiles:['/optional.js']};
 await applyUpdate({reg:{waiting:{postMessage(){}}},container,askStatus:async()=>status,
  onPhase:(phase,progress)=>phases.push({phase,progress}),refreshShell:async()=>{downloaded=true;},setTimeout:()=>{}});
 assert.equal(downloaded,false);assert.equal(phases[0].phase,'ready');assert.deepStrictEqual(phases[0].progress,status);
 });
 test('offline cache status reports preparing and complete counts in Settings',()=>{
 const vm=require('node:vm'),fs=require('node:fs'),element={};
 const sandbox={document:{getElementById:()=>element}};
 vm.runInNewContext(fs.readFileSync(__dirname+'/sw-update.js','utf8'),sandbox);
 sandbox.SwUpdate.showOfflineStatus({offlineReady:false,cached:90,total:151});
 assert.equal(element.textContent,'Preparing offline 90/151');
 sandbox.SwUpdate.showOfflineStatus({offlineReady:true,cached:151,total:151});
 assert.equal(element.textContent,'Offline ready 151/151');
 sandbox.SwUpdate.showOfflineStatus({ready:true});assert.equal(element.textContent,'Offline ready (legacy cache)');
 });
--- a/frontend/sw.js
+++ b/frontend/sw.js
@@ -70,6 +70,7 @@ const SHELL = [
  '/glass-panel-layout.js',
  '/theme-classic.css',
  '/recommendations.css',
  '/audio-graph.js',
  '/flag-ui.js',
  '/export.js',
  '/async-guard.js',
@@ -264,6 +265,9 @@ self.addEventListener('fetch', (e) => {
    return;
  }
  // The page schedules completion after first paint/idle via Lazy.warm(). Do
  // not start a six-file background burst from this foreground fetch event.
  // Only intercept GET/HEAD — let POST (sync endpoint) go through unmodified
  if (request.method !== 'GET' && request.method !== 'HEAD') return;
@@ -300,8 +304,48 @@ self.addEventListener('fetch', (e) => {
 // ---- Message: handle SKIP_WAITING from the client ----
 const playingClients = new Map(), deferredClients = new Set();
-let activeLayout = 'classic', layoutReply, warmTask;
+let activeLayout = 'classic', layoutReply;
 let completionTask;
 function completeAssets(force = false, requestedOptIns) {
  if (!ASSET_SYNC) return Promise.resolve();
  if (completionTask) {
    if (!requestedOptIns) return completionTask;
    return completionTask.finally(() => completeAssets(true, requestedOptIns));
  }
  completionTask ||= (async () => {
    const cache = await caches.open(AssetSyncCore.CACHE);
    const m = (await AssetSyncCore.state(cache))?.current;
    if (!m || m.buildTag !== VERSION) return;
    const optIns = requestedOptIns || await AssetSyncCore.readOptIns(cache);
    const job = await AssetSyncCore.complete(m, { cache, fetchFn: fetch, force, optIns,
      notify: async status => {
        for (const client of await self.clients.matchAll({ type: 'window' }))
          client.postMessage({ type: 'OFFLINE_STATUS', ...status });
      }
    });
    if (!job.offlineReady) {
      // Chromium can wake this job without a page; Safari resumes on the next
      // navigation/online message. No timers outside an event lifetime.
      try { await self.registration.sync?.register('ytp-offline-complete'); } catch {}
    }
  })().catch(error => console.warn('[asset-sync] completion paused', error.message))
    .finally(() => { completionTask = null; });
  return completionTask;
 }
 self.addEventListener('sync', e => {
  if (e.tag === 'ytp-offline-complete') e.waitUntil(completeAssets());
 });
 self.addEventListener('message', (e) => {
  if (ASSET_SYNC && e.data?.type === 'OFFLINE_OPT_INS' && Array.isArray(e.data.values)) {
    e.waitUntil((async () => {
      const cache = await caches.open(AssetSyncCore.CACHE);
      const current = (await AssetSyncCore.state(cache))?.current || await candidate(cache);
      const allowed = new Set(Object.values(current?.groups || {}).map(group => group.offlineOptIn).filter(Boolean));
      const values = [...new Set(e.data.values.filter(value => typeof value === 'string' && allowed.has(value)))];
      await cache.put(AssetSyncCore.OPT_INS, Response.json(values));
      await completeAssets(true, values);
    })());
  }
  if (ASSET_SYNC && e.data?.type === 'LAYOUT' && e.source && typeof e.data.value === 'string') {
    activeLayout = e.data.value;
    layoutReply?.();
@@ -315,14 +359,8 @@ self.addEventListener('message', (e) => {
      }
    })());
  }
-  if (ASSET_SYNC && e.data?.type === 'WARM_ASSETS' && !e.data.saveData) {
+  if (ASSET_SYNC && ['WARM_ASSETS', 'COMPLETE_ASSETS'].includes(e.data?.type)) {
-    // Boot, activation and multiple tabs can report idle together. Share the
+    e.waitUntil(completeAssets(e.data.type === 'COMPLETE_ASSETS'));
    // verified pool so they never download the same missing group twice.
    warmTask ||= (async()=>{
      const cache=await caches.open(AssetSyncCore.CACHE), m=(await AssetSyncCore.state(cache))?.current;
      if(m)await AssetSyncCore.syncAssets(m,{cache,fetchFn:fetch,groups:Object.keys(m.groups).filter(name=>m.groups[name].background)});
    })().catch(error=>console.warn('[asset-sync] idle warm interrupted',error.message)).finally(()=>{warmTask=null;});
    e.waitUntil(warmTask);
  }
  if (e.data && e.data.type === 'PLAYING' && e.source) {
    playingClients.set(e.source.id, !!e.data.value);
@@ -339,6 +377,7 @@ self.addEventListener('message', (e) => {
  // deletes its cache on failure, but a cache can also be evicted under
  // storage pressure, so the files are actually checked.
  if (e.data && e.data.type === 'CACHE_STATUS') {
    if (ASSET_SYNC) e.waitUntil(completeAssets());
    e.waitUntil((async () => {
      if (ASSET_SYNC) {
        let reply = { ready: false, missing: -1, version: VERSION };
@@ -347,7 +386,7 @@ self.addEventListener('message', (e) => {
          const pending = await candidate(cache), m = pending || state?.current;
          if(m) reply = await AssetSyncCore.status(m,cache,{previous:pending ? state?.current : state?.previous,activeLayout:e.data.activeLayout || (pending ? m.activeLayout : activeLayout) || 'classic'});
        } catch {}
-        reply.type = 'CACHE_STATUS'; reply.assetSync = true;
+        reply.type = 'CACHE_STATUS'; reply.assetSync = true; reply.completing = !!completionTask && !reply.offlineReady;
        if(e.ports && e.ports[0]) e.ports[0].postMessage(reply); else if(e.source) e.source.postMessage(reply);
        return;
      }
@@ -513,6 +552,10 @@ async function installAssets() {
    for(const name of layouts)for(const dependency of m.groups[name].dependencies || [])layouts.add(dependency);
    await AssetSyncCore.syncAssets(m,{cache,fetchFn:fetchAsset,groups:[...layouts]});
  }
  // Copy and hash legacy shell entries before the candidate reaches `installed`.
  // A legacy page's Refresh UI then activates quickly, before its four-second
  // reload safety timer can send it back into the old shell.
  m.legacyCacheNames = await migrateLegacy(cache,m);
  await cache.put(candidateKey, new Response(JSON.stringify(m)));
 }
 async function migrateLegacy(cache, m) {
@@ -543,7 +586,11 @@ async function migrateLegacy(cache, m) {
 async function activateAssets() {
  const cache = await caches.open(AssetSyncCore.CACHE), m = await candidate(cache);
  if (!m) throw Error('Missing candidate manifest');
-  const names = await migrateLegacy(cache,m), old = await AssetSyncCore.state(cache);
+  // Legacy migration is staged by installAssets. Keep the fallback for
  // candidates created by an older worker version.
  const names = m.legacyCacheNames || await migrateLegacy(cache,m);
  delete m.legacyCacheNames;
  const old = await AssetSyncCore.state(cache);
  const previousClients = (await self.clients.matchAll({type:'window'})).map(c=>c.id);
  await AssetSyncCore.commit(m,cache,{previousClients,activeLayout:m.activeLayout || activeLayout});
  // Legacy deletion occurs strictly after verified commit.
@@ -551,6 +598,9 @@ async function activateAssets() {
  for (const req of await cache.keys()) if(new URL(req.url).pathname.startsWith('/__ytp_candidate/')) await cache.delete(req);
  await self.clients.claim();
  if(old && old.current.buildTag !== m.buildTag) for(const c of await self.clients.matchAll({type:'window',includeUncontrolled:true})) c.postMessage({type:'SW_UPDATE_AVAILABLE',version:VERSION});
  // Resume completion after activation, but with one request at a time so
  // foreground navigation retains most of the available bandwidth.
  self.registration.active.postMessage({ type: 'COMPLETE_ASSETS' });
  try { console.info('[asset-sync] storage', await self.navigator.storage.estimate()); } catch {}
 }
 async function assetFetch(request, clientId) {
@@ -575,7 +625,13 @@ async function assetFetch(request, clientId) {
    if(state.current.files[path]?.h === h) {
      const previousKey=AssetSyncCore.fallback(state.current,state.previous,path);
      const previousResponse=previousKey && await cache.match(previousKey);
-      if(previousResponse && previousResponse.headers.get('X-Asset-Hash')===state.previous.files[path].h) return previousResponse;
+      if(previousResponse && previousResponse.headers.get('X-Asset-Hash')===state.previous.files[path].h) {
        // A stale body returned under a new URL must not poison the browser's
        // resource cache either. Its decoded stream has no transport encoding.
        const headers=new Headers(previousResponse.headers);headers.set('Cache-Control','no-store');
        for(const name of ['Content-Encoding','Content-Length','Transfer-Encoding'])headers.delete(name);
        return new Response(previousResponse.body,{status:previousResponse.status,headers});
      }
    }
    try { const r = await fetch(key); if(r.ok && r.headers.get('X-Asset-Hash') !== h) return new Response('Asset version unavailable',{status:409}); if(r.ok && request.method !== 'HEAD') await cache.put(key,r.clone()); return r; } catch { return new Response('Offline',{status:503}); }
  }
--- a/frontend/theme-bento-hub.css
+++ b/frontend/theme-bento-hub.css
@@ -183,7 +183,7 @@ html[data-layout="bento-hub"] .player-pane.empty .player-stage { border:0; borde
 html[data-layout="bento-hub"] :is(#controls,.now-meta,.notes-panel,.upnext,.related-panel) { flex-shrink:0; padding:16px; border:1px solid var(--line); border-radius:16px; background:var(--bg-1); box-shadow:var(--shadow-sm); }
 html[data-layout="bento-hub"] #controls { gap:12px; }
 html[data-layout="bento-hub"] #controls .deck-main { gap:8px; }
-html[data-layout="bento-hub"] #controls .deck-main .ctrl { width:44px; height:44px; min-width:44px; padding:10px; background:var(--bg-2); color:var(--text); border:1px solid var(--line); border-radius:999px; box-shadow:none; }
+html[data-layout="bento-hub"] #controls .deck-main .ctrl { width:44px; height:44px; min-width:44px; padding:10px; background:var(--bg-2); color:var(--text); border:1px solid var(--line); border-radius:16px; box-shadow:none; }
 html[data-layout="bento-hub"] #controls .deck-main .ctrl.play { width:56px; height:56px; padding:14px; background:var(--accent); color:var(--on-accent); border:0; box-shadow:0 6px 18px -4px var(--accent-glow); }
 html[data-layout="bento-hub"] #controls .deck-main .ctrl.play svg { width:28px; height:28px; }
 html[data-layout="bento-hub"] #controls .deck-main .ctrl.active { color:var(--accent-sec); border-color:var(--accent-sec); }
@@ -314,7 +314,7 @@ html[data-layout="bento-hub"] .hero-title { background:none; -webkit-text-fill-c
 html[data-layout="bento-hub"] .ph-logo { width:56px; height:56px; border-radius:16px; color:var(--on-accent); animation:none; }
 html[data-layout="bento-hub"] .player-pane.empty :is(#controls,#nowPlayingMeta,#notesPanel,.upnext) { display:none; }
 html[data-layout="bento-hub"] .body:has(.cards[data-view="settings"]) #listFilterBar { display:none; }
-html[data-layout="bento-hub"] #controls .deck-main .ctrl { border-radius:999px; }
+html[data-layout="bento-hub"] #controls .deck-main .ctrl { border-radius:16px; }
 html[data-layout="bento-hub"] #controls input[type="range"]::-webkit-slider-thumb { border:0; box-shadow:var(--shadow-sm); }
 html[data-layout="bento-hub"] #nowPlayingMeta .np-actions :is(#addBtn,#saveBtn,#exportBtn,#serviceBtn) { border:1px solid var(--line); border-radius:10px; background:var(--bg-2); color:var(--text); box-shadow:none; min-width:44px; }
 html[data-layout="bento-hub"] #nowPlayingMeta .np-actions #saveBtn.done { color:var(--accent-sec); }
--- a/frontend/theme-glass.css
+++ b/frontend/theme-glass.css
@@ -87,7 +87,7 @@ html[data-layout="glass-stage"] .stg-skip, html[data-layout="glass-stage"] .stg-
 html[data-layout="glass-stage"] .stg-skip { width: 46px; height: 46px; border-radius: 50%; background: rgba(0, 0, 0, 0.45); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); }
 html[data-layout="glass-stage"] .stg-skip svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
 html[data-layout="glass-stage"] .stg-play { width: 62px; height: 62px; border-radius: 50%; border: 0; background: linear-gradient(135deg, #ff553c, #ff8471); box-shadow: 0 0 34px rgba(255, 85, 60, 0.6); }
-html[data-layout="glass-stage"] .stg-play svg { width: 32px; height: 32px; fill: currentColor; stroke: none; }
+html[data-layout="glass-stage"] .stg-play svg { width: 32px; height: 32px; fill: none; stroke: currentColor; stroke-width:1.5; }
 /* ---- 2. deck ---- */
 html[data-layout="glass-stage"] #controls { padding: 16px; gap: 14px; }
@@ -95,7 +95,7 @@ html[data-layout="glass-stage"] #controls .deck-main { display: flex; justify-co
 html[data-layout="glass-stage"] #controls .deck-main .ctrl { width: 46px; height: 46px; border-radius: 16px; background: var(--tile); border: 1px solid var(--glass-line); }
 html[data-layout="glass-stage"] #controls .deck-main .ctrl.skip10 { display: grid; width: 44px; height: 44px; color: var(--text-2); }
 html[data-layout="glass-stage"] #controls .deck-main .ctrl.skip10 svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
-html[data-layout="glass-stage"] #controls .deck-main .ctrl.play { width: 64px; height: 64px; border-radius: 50%; border: 0; background: var(--grad); box-shadow: 0 12px 30px rgba(255, 85, 60, 0.55), 0 0 20px rgba(255, 85, 60, 0.35); }
+html[data-layout="glass-stage"] #controls .deck-main .ctrl.play { width: 64px; height: 64px; border-radius: 50%; border: 1px solid var(--glass-line); background: var(--tile); backdrop-filter:blur(12px); box-shadow:none; }
 html[data-layout="glass-stage"] #controls .deck-main .ctrl.play svg { width: 32px; height: 32px; }
 html[data-layout="glass-stage"] #controls .time { font: 600 12px var(--mono); }
--- a/frontend/transport-icons.test.js
+++ b/frontend/transport-icons.test.js
@@ -0,0 +1,48 @@
 const {test}=require('node:test');
 const assert=require('node:assert/strict');
 const {readFileSync,readdirSync}=require('node:fs');
 const {join}=require('node:path');
 const vm=require('node:vm');
 const {transport}=require('./download-actions');
 test('transport symbols cover all actions and layouts with monochrome SVG',()=>{
 for(const kind of ['play','pause','previous','next','back10','forward10','back15','forward']){
  assert.match(transport.svg(kind),new RegExp(`href="#transport-${kind}"`));
  assert.match(transport.svg(kind),/stroke="currentColor"/);
  assert.equal((transport.svg(kind).match(/<use /g)||[]).length,4,'layout selection lives on visible use elements');
  for(const layout of ['classic','f7-swipe','glass-stage','bento-hub'])assert.ok(transport.variants[layout][kind]);
 }
 assert.throws(()=>transport.svg('unknown'),/Unknown transport/);
 });
 test('playback UI swaps shared symbols and accessible names without changing handlers',()=>{
 const buttons=Object.fromEntries(['playBtn','stgPlay','miniPlayBtn','servicePlayBtn'].map(id=>[id,{onclick:()=>id,setAttribute(k,v){this[k]=v;}}]));
 const handlers=Object.values(buttons).map(b=>b.onclick);let changes=0;
 const Player={master:{paused:true}},classes=[];
 const app=readFileSync(join(__dirname,'app.js'),'utf8');
 const body=app.slice(app.indexOf('function updatePlayBtn() {'),app.indexOf('// "⚠ Broken"'));
 const sandbox={Player,TransportIcons:transport,Remote:{changed(){changes++;}},$:id=>buttons[id],document:{querySelector:()=>({classList:{toggle:(...args)=>classes.push(args)}})}};
 vm.runInNewContext(body,sandbox);
 for(const paused of [true,false,true]){
  Player.master.paused=paused;sandbox.updatePlayBtn();
  for(const b of Object.values(buttons)){assert.match(b.innerHTML,new RegExp(`#transport-${paused?'play':'pause'}`));assert.equal(b['aria-label'],paused?'Play':'Pause');}
 }
 assert.equal(changes,3);assert.deepEqual(Object.values(buttons).map(b=>b.onclick),handlers);
 assert.deepEqual(classes,[['is-paused',true],['is-paused',false],['is-paused',true]]);
 });
 test('runtime sources never render legacy transport glyphs',()=>{
 const failures=[];
 for(const file of readdirSync(__dirname).filter(f=>/\.(js|html|css)$/.test(f)&&!f.endsWith('.test.js'))){
  readFileSync(join(__dirname,file),'utf8').split('\n').forEach((line,i)=>{
   // Legacy input decoder accepts old labels; its output uses shared symbols.
   if(file==='glass-controls.js'&&line.startsWith('  const glyphs = '))return;
   if(/[▶⏸⏮⏭⏪⏩⏯◀❚]/u.test(line))failures.push(`${file}:${i+1}`);
  });
 }
 assert.deepEqual(failures,[]);
 });
 test('state changes preserve named SVG nodes used by editor controls',()=>{
 let icon={id:'playIcon'};
 const button={querySelector(){return icon;},set innerHTML(value){this.markup=value;icon={id:''};},setAttribute(name,value){this[name]=value;}};
 transport.set(button,'pause');
 assert.equal(icon.id,'playIcon');assert.equal(button['aria-label'],'Pause');assert.match(button.markup,/#transport-pause-f7-swipe/);
 });
--- a/frontend/vendor/jamesdsp/LICENSE.txt
+++ b/frontend/vendor/jamesdsp/LICENSE.txt
@@ -0,0 +1,674 @@
                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007
 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.
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                     END OF TERMS AND CONDITIONS
            How to Apply These Terms to Your New Programs
  If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
 free software which everyone can redistribute and change under these terms.
  To do so, attach the following notices to the program.  It is safest
 to attach them to the start of each source file to most effectively
 state the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>
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    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 Also add information on how to contact you by electronic and paper mail.
  If the program does terminal interaction, make it output a short
 notice like this when it starts in an interactive mode:
    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.
 The hypothetical commands `show w' and `show c' should show the appropriate
 parts of the General Public License.  Of course, your program's commands
 might be different; for a GUI interface, you would use an "about box".
  You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
 <https://www.gnu.org/licenses/>.
  The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
 <https://www.gnu.org/licenses/why-not-lgpl.html>.
--- a/frontend/vendor/jamesdsp/README.md
+++ b/frontend/vendor/jamesdsp/README.md
@@ -0,0 +1,17 @@
 # JamesDSP vendor files
 The browser port's worklet, 8–96 kHz streaming sample-rate adapter, matrix
 convolver, HRTF/virtual-speaker spatial stage, generated IRs and IndexedDB IR
 store are pinned to the source revision in VERSION.txt. Runtime files stay in
 the lazy `feature:jamesdsp` group. A user must enable the engine or choose
 “Download audio effects for offline” before the offline-completion job caches
 them, including the WASM binary.
 The adapted wrapper resolves dependencies through `Lazy.url()` and routes the
 worklet through the existing AudioGraph. It rejects Liveprog, DDC and arbitrary
 text effects. Impulse responses are limited to 65,536 internal frames; lower-
 power devices use a 24,000-frame cap and warn before larger responses are used.
 The port is GPL-3.0-or-later (`LICENSE.txt`). The upstream license snapshot says
 GPL-2.0; both supplied notices remain in this directory pending upstream
 clarification. See VERSION.txt for the adaptation record.
--- a/frontend/vendor/jamesdsp/UPSTREAM-MAIN-LICENSE.txt
+++ b/frontend/vendor/jamesdsp/UPSTREAM-MAIN-LICENSE.txt
@@ -0,0 +1,340 @@
 GNU GENERAL PUBLIC LICENSE
                       Version 2, June 1991
 Copyright (C) 1989, 1991 Free Software Foundation, Inc., <http://fsf.org/>
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.
                            Preamble
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 License is intended to guarantee your freedom to share and change free
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  The precise terms and conditions for copying, distribution and
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                    GNU GENERAL PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
  0. This License applies to any program or other work which contains
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 Each version is given a distinguishing version number.  If the Program
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  10. If you wish to incorporate parts of the Program into other free
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                            NO WARRANTY
  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
 REPAIR OR CORRECTION.
  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGES.
                     END OF TERMS AND CONDITIONS
            How to Apply These Terms to Your New Programs
  If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
 free software which everyone can redistribute and change under these terms.
  To do so, attach the following notices to the program.  It is safest
 to attach them to the start of each source file to most effectively
 convey the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
    {description}
    Copyright (C) {year}  {fullname}
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 Also add information on how to contact you by electronic and paper mail.
 If the program is interactive, make it output a short notice like this
 when it starts in an interactive mode:
    Gnomovision version 69, Copyright (C) year name of author
    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.
 The hypothetical commands `show w' and `show c' should show the appropriate
 parts of the General Public License.  Of course, the commands you use may
 be called something other than `show w' and `show c'; they could even be
 mouse-clicks or menu items--whatever suits your program.
 You should also get your employer (if you work as a programmer) or your
 school, if any, to sign a "copyright disclaimer" for the program, if
 necessary.  Here is a sample; alter the names:
  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
  `Gnomovision' (which makes passes at compilers) written by James Hacker.
  {signature of Ty Coon}, 1 April 1989
  Ty Coon, President of Vice
 This General Public License does not permit incorporating your program into
 proprietary programs.  If your program is a subroutine library, you may
 consider it more useful to permit linking proprietary applications with the
 library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.
--- a/frontend/vendor/jamesdsp/VERSION.txt
+++ b/frontend/vendor/jamesdsp/VERSION.txt
@@ -0,0 +1,18 @@
 JamesDSP browser port source revision: a982b53c4ab347d1d9c50f4ce7ee3c2735eaa817
 Repository: /home/josh/development/personal/jamesdsp-web (main)
 Vendored source files: web/jamesdsp-node.js, params.js, ir-utils.js,
 ir-builtins.js, ir-store.js, worklet.js, dsp/jamesdsp.js and dsp/jamesdsp.wasm.
 Integration adaptations: wrapper dependencies and WASM URLs use the page's
 manifest-hashed Lazy.url map; the worklet statically imports the pinned
 jamesdsp-a982b53.mjs module because AudioWorkletGlobalScope rejects dynamic
 import. The wrapper keeps the shared AudioGraph route and does not create a
 MediaElementSource. Liveprog, DDC and arbitrary text effects are rejected and
 not serialized in ytplayer. All runtime code remains in lazy feature:jamesdsp;
 its offline completion membership requires the explicit jamesDsp opt-in.
 The generated engine, parameter tables, IR utilities/store and built-in IR set
 are copied from the pinned revision. The uploaded/generated IR cap is 65,536
 frames at the internal 44.1/48 kHz rate (low-power devices use 24,000 frames).
 License provenance: LICENSE.txt is the port's GPL-3.0-or-later license. The
 upstream snapshot at upstream/Main/LICENSE contains GPL-2.0 text; see README.md.
--- a/frontend/vendor/jamesdsp/dsp/jamesdsp-a982b53.mjs
+++ b/frontend/vendor/jamesdsp/dsp/jamesdsp-a982b53.mjs
--- a/frontend/vendor/jamesdsp/dsp/jamesdsp.wasm
+++ b/frontend/vendor/jamesdsp/dsp/jamesdsp.wasm
--- a/frontend/vendor/jamesdsp/ir-builtins.mjs
+++ b/frontend/vendor/jamesdsp/ir-builtins.mjs
@@ -0,0 +1,22 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 const definitions={
  'Small room':{seconds:.5,rt60:.25,seed:0x51a11},
  Hall:{seconds:2,rt60:1.4,seed:0x4a11},
  Plate:{seconds:1.5,rt60:1,seed:0x91a7e},
  Cathedral:{seconds:5,rt60:4,seed:0xca7ed},
 };
 export const BUILTIN_IRS=Object.freeze(Object.fromEntries(Object.entries(definitions).map(([name,d])=>[name,Object.freeze({...d,version:1})])));
 export function generateIR(name,sampleRate,channels=2,{maxFrames=65536}={}) {
  const spec=BUILTIN_IRS[name];if(!spec||!Number.isInteger(sampleRate)||sampleRate<8000||sampleRate>96000||![1,2,4].includes(channels)) throw new RangeError('Unsupported generated IR');
  const frames=Math.max(1,Math.min(Math.round(spec.seconds*sampleRate),maxFrames));let seed=spec.seed>>>0;
  const paths=Array.from({length:channels},()=>new Float32Array(frames));
  const next=()=>{seed=(Math.imul(seed,1664525)+1013904223)>>>0;return seed/0x100000000*2-1;};
  for(let path=0;path<channels;path++) {
    const x=paths[path];x[0]=1;
    for(let tap=1;tap<Math.min(24,frames);tap++) {const at=Math.min(frames-1,Math.round(sampleRate*(.004+tap*.009+next()*.001)));x[at]+=(next()*.22)/(1+tap*.25);}
    for(let i=1;i<frames;i++) {const t=i/sampleRate, fade=Math.min(1,t/.012,(frames-i)/Math.max(1,sampleRate*.02));x[i]+=next()*.045*Math.exp(-6.91*t/spec.rt60)*Math.max(0,fade);}
  }
  let peak=0;for(const path of paths) for(const value of path) peak=Math.max(peak,Math.abs(value));
  for(const path of paths) for(let i=0;i<path.length;i++) path[i]*=.5/peak;
  return {name,sampleRate,numberOfChannels:channels,length:frames,seed:spec.seed,version:1,truncated:frames<spec.seconds*sampleRate,getChannelData:i=>paths[i]};
 }
--- a/frontend/vendor/jamesdsp/ir-store.mjs
+++ b/frontend/vendor/jamesdsp/ir-store.mjs
@@ -0,0 +1,24 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 const DB='jamesdsp-ir', STORE='irs', VERSION=1;
 function openDB() {
  if(!globalThis.indexedDB) return Promise.reject(new Error('IndexedDB is unavailable'));
  return new Promise((resolve,reject)=>{const request=indexedDB.open(DB,VERSION);request.onupgradeneeded=()=>request.result.createObjectStore(STORE,{keyPath:'name'});request.onsuccess=()=>resolve(request.result);request.onerror=()=>reject(request.error);});
 }
 async function transaction(mode,action) {
  const db=await openDB();return new Promise((resolve,reject)=>{const tx=db.transaction(STORE,mode),store=tx.objectStore(STORE);let result;try {result=action(store);} catch(error){db.close();reject(error);return;}tx.oncomplete=()=>{db.close();resolve(result);};tx.onerror=()=>{db.close();reject(tx.error);};tx.onabort=()=>{db.close();reject(tx.error||new Error('IR storage transaction aborted'));};});
 }
 async function digest(data) {const hash=await crypto.subtle.digest('SHA-256',data);return [...new Uint8Array(hash)].map(x=>x.toString(16).padStart(2,'0')).join('');}
 export async function saveIR(name,buffer,metadata={}) {
  if(typeof name!=='string'||!name.trim()||name.length>100||![1,2,4].includes(buffer?.numberOfChannels)||!Number.isFinite(buffer.sampleRate)||buffer.sampleRate<8000||buffer.sampleRate>96000||!buffer.length) throw new TypeError('Invalid named impulse response');
  const internalRate=buffer.sampleRate===44100?44100:48000;
  if(Math.round(buffer.length*internalRate/buffer.sampleRate)>65536) throw new RangeError('Stored impulse response exceeds the 65,536-frame internal limit');
  const channels=Array.from({length:buffer.numberOfChannels},(_,i)=>new Float32Array(buffer.getChannelData(i)));
  const pcm=new Float32Array(channels.length*buffer.length);for(let i=0;i<buffer.length;i++)for(let c=0;c<channels.length;c++)pcm[i*channels.length+c]=channels[c][i];
  const record={name:name.trim(),sampleRate:buffer.sampleRate,channels:channels.length,frames:buffer.length,pcm,metadata:{...metadata},hash:await digest(pcm.buffer),version:1};
  await transaction('readwrite',s=>s.put(record));return {name:record.name,hash:record.hash};
 }
 export async function getIR(name) {
  const db=await openDB();return new Promise((resolve,reject)=>{const r=db.transaction(STORE,'readonly').objectStore(STORE).get(name);r.onsuccess=async()=>{try {const x=r.result;if(!x){resolve(null);return;}if(await digest(x.pcm.buffer)!==x.hash)throw new Error('Stored IR hash mismatch');const channels=Array.from({length:x.channels},()=>new Float32Array(x.frames));for(let i=0;i<x.frames;i++)for(let c=0;c<x.channels;c++)channels[c][i]=x.pcm[i*x.channels+c];resolve({...x,buffer:{sampleRate:x.sampleRate,numberOfChannels:x.channels,length:x.frames,getChannelData:i=>channels[i]}});}catch(e){reject(e);}finally{db.close();}};r.onerror=()=>{db.close();reject(r.error);};});
 }
 export async function listIRs() {const db=await openDB();return new Promise((resolve,reject)=>{const r=db.transaction(STORE,'readonly').objectStore(STORE).getAll();r.onsuccess=()=>{db.close();resolve(r.result.map(({name,hash,sampleRate,channels,frames,metadata})=>({name,hash,sampleRate,channels,frames,metadata})));};r.onerror=()=>{db.close();reject(r.error);};});}
 export async function deleteIR(name) {await transaction('readwrite',s=>s.delete(name));}
--- a/frontend/vendor/jamesdsp/ir-utils.mjs
+++ b/frontend/vendor/jamesdsp/ir-utils.mjs
@@ -0,0 +1,43 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 const copyBuffer=(buffer,rate=buffer.sampleRate)=>{
  const channels=Array.from({length:buffer.numberOfChannels},(_,i)=>new Float32Array(buffer.getChannelData(i)));
  return {sampleRate:rate,numberOfChannels:channels.length,length:channels[0]?.length||0,getChannelData:i=>channels[i]};
 };
 export async function decodeIR(context,bytes) {
  const decoded=await context.decodeAudioData(bytes.slice(0));
  return resampleIR(decoded,context.sampleRate);
 }
 export function resampleIR(buffer,targetRate) {
  if(!Number.isFinite(targetRate)||targetRate<8000||targetRate>96000||!buffer?.numberOfChannels||buffer.numberOfChannels>4||!buffer.length) throw new RangeError('Invalid IR or target sample rate');
  if(buffer.sampleRate===targetRate) return copyBuffer(buffer,targetRate);
  const length=Math.max(1,Math.round(buffer.length*targetRate/buffer.sampleRate));
  const channels=[];
  for(let ch=0;ch<buffer.numberOfChannels;ch++) {
    const input=buffer.getChannelData(ch), output=new Float32Array(length), ratio=buffer.sampleRate/targetRate;
    for(let i=0;i<length;i++) {const x=i*ratio, a=Math.min(Math.floor(x),input.length-1), b=Math.min(a+1,input.length-1), f=x-a;output[i]=input[a]*(1-f)+input[b]*f;}
    channels.push(output);
  }
  return {sampleRate:targetRate,numberOfChannels:channels.length,length,getChannelData:i=>channels[i]};
 }
 export function trimIR(buffer,{thresholdDb=-80}={}) {
  if(!Number.isFinite(thresholdDb)||thresholdDb>0||thresholdDb<-160) throw new RangeError('Invalid trim threshold');
  const channels=Array.from({length:buffer.numberOfChannels},(_,i)=>buffer.getChannelData(i));
  const threshold=10**(thresholdDb/20);let first=buffer.length,last=-1;
  for(let i=0;i<buffer.length;i++) {let peak=0;for(const channel of channels) peak=Math.max(peak,Math.abs(channel[i]));if(peak>=threshold){first=Math.min(first,i);last=i;}}
  if(last<0) first=last=0;
  const result=channels.map(channel=>channel.slice(first,last+1));
  return {buffer:{sampleRate:buffer.sampleRate,numberOfChannels:result.length,length:result[0]?.length||0,getChannelData:i=>result[i]},startFrame:first,endFrame:last+1};
 }
 export function normalizeIR(buffer,{peak=0.5}={}) {
  if(!Number.isFinite(peak)||peak<=0||peak>1) throw new RangeError('Peak must be in (0, 1]');
  const channels=Array.from({length:buffer.numberOfChannels},(_,i)=>new Float32Array(buffer.getChannelData(i)));
  let max=0;for(const channel of channels) for(const value of channel) max=Math.max(max,Math.abs(value));
  const gain=max===0?1:peak/max;for(const channel of channels) for(let i=0;i<channel.length;i++) channel[i]*=gain;
  return {sampleRate:buffer.sampleRate,numberOfChannels:channels.length,length:channels[0]?.length||0,getChannelData:i=>channels[i]};
 }
 export function prepareIR(context,buffer,{trim=false,normalize=true,peak=0.5,thresholdDb=-80}={}) {
  let result=resampleIR(buffer,context.sampleRate);
  if(trim) result=trimIR(result,{thresholdDb}).buffer;
  if(normalize) result=normalizeIR(result,{peak});
  return result;
 }
--- a/frontend/vendor/jamesdsp/jamesdsp-feature.js
+++ b/frontend/vendor/jamesdsp/jamesdsp-feature.js
@@ -0,0 +1,246 @@
 /* Lazy classic-script bridge for the optional JamesDSP ES module and worklet. */
 (function (root) {
  'use strict';
  let irToolsPromise;
  const irTools = () => irToolsPromise ||= Promise.all([
    import(root.Lazy.url('/vendor/jamesdsp/ir-utils.mjs')),
    import(root.Lazy.url('/vendor/jamesdsp/ir-builtins.mjs')),
    import(root.Lazy.url('/vendor/jamesdsp/ir-store.mjs')),
  ]).then(([utils,builtins,store])=>({utils,builtins,store}));
  const PRESETS = Object.freeze({
    flat: { name: 'Flat', params: {} },
    bass: { name: 'Bass', params: { 'eq.enabled': 1, 'eq.band0': 4, 'eq.band1': 3, 'bass.enabled': 1, 'bass.boost': 5, gain: -3 } },
    vocal: { name: 'Vocal', params: { 'eq.enabled': 1, 'eq.band5': 2, 'eq.band7': 3, 'eq.band9': 2, 'compressor.enabled': 1 } },
    loudness: { name: 'Loudness', params: { 'limiter.threshold': -3, gain: 2 } },
    headphone: { name: 'Headphone', params: { 'crossfeed.enabled': 1, 'crossfeed.mode': 1 } },
    bright: { name: 'Bright', params: { 'eq.enabled': 1, 'eq.band9': 2, 'eq.band10': 3, 'eq.band11': 3, 'eq.band12': 2 } },
    warm: { name: 'Warm', params: { 'eq.enabled': 1, 'eq.band0': 3, 'eq.band1': 2, 'eq.band7': -1, gain: -2 } },
  });
  const clampGain = value => Math.max(-24, Math.min(12, Number(value) || 0));
  function createController(options) {
    const graph = options.graph;
    let desired = false, active = false, bypassed = false, nodeEntry = null, gainNode = null, context = null;
    let elements = [], standardInput = null, levelDb = 0, settings = null;
    let tail = Promise.resolve(), maxLiveHeaps = 0, liveHeaps = 0, nodesCreated = 0, nodesDestroyed = 0, loadedIRRef = null;
    let faultListener = null, notifying = false, dspAnalyser = null;
    const serial = fn => {
      const result = tail.then(fn, fn);
      tail = result.catch(() => {});
      return result;
    };
    function snapshot() { return { active, desired, bypassed, route: active && !bypassed ? 'jamesdsp' : 'standard', liveHeaps, maxLiveHeaps, nodesCreated, nodesDestroyed, sampleRate: context?.sampleRate || null, irRef: loadedIRRef }; }
    function routeStandard() {
      if (!elements.length) return;
      try {
        graph.routeAll(elements, standardInput || context?.destination);
      } catch (error) {
        try { if (context?.destination) graph.routeAll(elements, context.destination); } catch { /* direct graph route is the last audible fallback */ }
        throw error;
      }
    }
    function releaseNode() {
      const entry = nodeEntry;
      nodeEntry = null;
      if (faultListener && entry) entry.node.removeEventListener('error', faultListener);
      faultListener = null;
      try { entry?.node.node.disconnect(); } catch { /* already disconnected */ }
      try { gainNode?.disconnect(); } catch { /* already disconnected */ }
      gainNode = null;
      try { dspAnalyser?.disconnect(); } catch { /* already disconnected */ }
      dspAnalyser = null;
      if (entry) {
        try { entry.node.destroy(); } catch { /* continue freeing references */ }
        loadedIRRef = null;
        if (entry.live) { entry.live = false; liveHeaps = Math.max(0, liveHeaps - 1); nodesDestroyed++; }
      }
    }
    function fail(error) {
      desired = false;
      active = false;
      bypassed = false;
      try { routeStandard(); } catch { /* graph route has already tried a direct audible fallback */ }
      releaseNode();
      if (!notifying) {
        notifying = true;
        try { options.onError?.(error instanceof Error ? error : new Error(String(error || 'JamesDSP failed'))); }
        finally { notifying = false; }
      }
    }
    function rampGain(value) {
      if (!gainNode || !context) return;
      const param = gainNode.gain;
      const now = context.currentTime || 0;
      if (context.state !== 'running' || typeof param.linearRampToValueAtTime !== 'function') {
        param.value = value;
        return;
      }
      param.cancelScheduledValues?.(now);
      param.setValueAtTime?.(param.value, now);
      param.linearRampToValueAtTime(value, now + 0.018);
    }
    async function configure(instance, nextSettings, nextLevelDb) {
      const preset = PRESETS[nextSettings?.preset] || PRESETS.flat;
      const params = { ...preset.params, ...(nextSettings?.params || {}) };
      if (Number(params['spatial.enabled']) && Number(params['crossfeed.enabled'])) params['crossfeed.enabled'] = 0;
      params.gain = clampGain((Number(params.gain) || 0) + (Number(nextLevelDb) || 0));
      params.bypass = 1;
      if (active && context?.state === 'running') {
        rampGain(0);
        await new Promise(resolve => setTimeout(resolve, 20));
      }
      await instance.setBypass(true);
      const ref = nextSettings?.irRef;
      const needsIR = ref && (loadedIRRef?.name !== ref.name || loadedIRRef?.hash !== ref.hash);
      await instance.applyPreset(needsIR ? { params, irRef: ref } : params);
      if (needsIR) loadedIRRef = { name: ref.name, hash: ref.hash };
      await instance.setParam('gain', params.gain);
      if (desired) await instance.setBypass(bypassed);
      if (desired) rampGain(1);
    }
    async function loadNode(audioContext) {
      const moduleURL = root.Lazy.url('/vendor/jamesdsp/jamesdsp-node.mjs');
      const { JamesDSPNode } = await import(moduleURL);
      return JamesDSPNode.create(audioContext, {
        wasmURL: root.Lazy.url('/vendor/jamesdsp/dsp/jamesdsp.wasm'),
        paramsURL: root.Lazy.url('/vendor/jamesdsp/params.mjs'),
        workletURL: root.Lazy.url('/vendor/jamesdsp/worklet.mjs'),
      });
    }
    async function enable(nextSettings, nextLevelDb = levelDb) {
      desired = true;
      settings = nextSettings || {};
      levelDb = Number(nextLevelDb) || 0;
      return serial(async () => {
        if (!desired) return false;
        const prepared = await options.prepareGraph();
        context = prepared.context;
        elements = prepared.elements;
        standardInput = prepared.standardInput;
        if (!Number.isFinite(context?.sampleRate) || context.sampleRate < 8000 || context.sampleRate > 96000) throw new RangeError(`JamesDSP supports 8–96 kHz; this device uses ${context?.sampleRate || 'unknown'} Hz`);
        if (!desired) return false;
        let instance = nodeEntry?.node;
        if (!instance) {
          instance = await (options.loadNode || loadNode)(context);
          if (!desired) { try { instance.destroy(); } catch {} return false; }
          nodeEntry = { node: instance, live: true };
          liveHeaps++; nodesCreated++; maxLiveHeaps = Math.max(maxLiveHeaps, liveHeaps);
          faultListener = event => fail(event.detail || new Error('JamesDSP processing failed'));
          instance.addEventListener('error', faultListener);
          gainNode = context.createGain();
          gainNode.gain.value = 1;
          instance.node.connect(gainNode);
          gainNode.connect(context.destination);
        }
        if (!desired) { releaseNode(); return false; }
        await configure(instance, settings, levelDb);
        if (!desired) { releaseNode(); return false; }
        if (context.state === 'suspended') await context.resume().catch(() => {});
        graph.routeAll(elements, bypassed ? standardInput : instance.node);
        active = true;
        return true;
      }).catch(error => { fail(error); throw error; });
    }
    function disable() {
      desired = false;
      bypassed = false;
      if (active) {
        active = false;
        try { routeStandard(); } catch { /* routeStandard tried its direct fallback */ }
      }
      return serial(async () => { releaseNode(); return true; });
    }
    function setLevelDb(value) {
      levelDb = Number(value) || 0;
      if (!desired) return Promise.resolve(false);
      return enable(settings, levelDb);
    }
    function changeBypass(value) {
      if (!nodeEntry) return Promise.resolve(false);
      return serial(async () => {
        const next = Boolean(value);
        if (next === bypassed) return bypassed;
        // A/B bypass is an exact route around the worklet. This preserves the
        // Standard graph sample-for-sample instead of relying on DSP bypass math.
        if (!next) await nodeEntry.node.setBypass(false);
        if (active) {
          rampGain(0);
          await new Promise(resolve => setTimeout(resolve, 20));
          graph.routeAll(elements, next ? standardInput : nodeEntry.node);
          rampGain(next ? 0 : 1);
        }
        if (next) await nodeEntry.node.setBypass(true);
        bypassed = next;
        return bypassed;
      }).catch(error => { fail(error); throw error; });
    }
    function setBypass(value) { return changeBypass(value); }
    function toggleBypass() { return changeBypass(!bypassed); }
    function loadIR(buffer, reference = null) {
      if (!active || !nodeEntry) return Promise.reject(new Error('Enable JamesDSP before loading an impulse response'));
      return serial(async () => {
        if (!active || !nodeEntry) throw new Error('JamesDSP is no longer active');
        rampGain(0);
        try { await nodeEntry.node.loadIR(buffer, reference); loadedIRRef = reference ? { name: reference.name, hash: reference.hash } : null; await nodeEntry.node.setParam('convolver.enabled', 1); }
        finally { if (active && desired) rampGain(1); }
        return true;
      }).catch(error => { fail(error); throw error; });
    }
    function analyser() {
      if (!active || !gainNode || !context) return null;
      if (!dspAnalyser) {
        dspAnalyser = context.createAnalyser();
        dspAnalyser.fftSize = 128;
        dspAnalyser.smoothingTimeConstant = 0.78;
        gainNode.disconnect();
        gainNode.connect(dspAnalyser);
        dspAnalyser.connect(context.destination);
      }
      return dspAnalyser;
    }
    return { enable, disable, setLevelDb, setBypass, toggleBypass, loadIR, analyser, get active() { return active; }, get desired() { return desired; }, state: snapshot };
  }
  async function generateIR(name, sampleRate, channels = 2, maxFrames = 65536) {
    const {builtins}=await irTools();
    return builtins.generateIR(name,sampleRate,channels,{maxFrames});
  }
  async function decodeIR(context, bytes) { const {utils}=await irTools();return utils.decodeIR(context,bytes); }
  async function prepareIR(context, buffer, maxFrames = 65536) {
    const {utils}=await irTools();
    const rate=context.sampleRate===44100?44100:48000;
    const prepared=utils.resampleIR(utils.prepareIR(context,buffer,{normalize:false}),rate);
    if (![1,2,4].includes(prepared.numberOfChannels) || prepared.length<1 || prepared.length>Math.min(65536,maxFrames)) throw new RangeError(`Impulse response exceeds the ${Math.min(65536,maxFrames)}-frame internal limit`);
    return prepared;
  }
  async function saveIR(name, buffer, metadata) { const {store}=await irTools();return store.saveIR(name,buffer,metadata); }
  async function getIR(name) { const {store}=await irTools();return store.getIR(name); }
  async function listIRs() { const {store}=await irTools();return store.listIRs(); }
  async function deleteIR(name) { const {store}=await irTools();return store.deleteIR(name); }
  const api = { PRESETS, createController, generateIR, decodeIR, prepareIR, saveIR, getIR, listIRs, deleteIR };
  if (typeof module !== 'undefined' && module.exports) module.exports = api;
  else {
    root.YT = root.YT || {};
    root.YT.JamesDSPFeature = api;
  }
 })(typeof window !== 'undefined' ? window : globalThis);
--- a/frontend/vendor/jamesdsp/jamesdsp-node.mjs
+++ b/frontend/vendor/jamesdsp/jamesdsp-node.mjs
@@ -0,0 +1,84 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 function assetURL(path, fallback) { return globalThis.Lazy?.url?.(path) || new URL(fallback, import.meta.url); }
 const [parameterAPI, irUtils, irStore] = await Promise.all([
  import(assetURL('/vendor/jamesdsp/params.mjs', './params.mjs')),
  import(assetURL('/vendor/jamesdsp/ir-utils.mjs', './ir-utils.mjs')),
  import(assetURL('/vendor/jamesdsp/ir-store.mjs', './ir-store.mjs')),
 ]);
 const {DEFAULT_PARAMS, validateParam} = parameterAPI;
 const {prepareIR,resampleIR} = irUtils;
 const {getIR} = irStore;
 const moduleLoads = new WeakMap();
 export class JamesDSPNode extends EventTarget {
  static async create(context, {wasmURL=assetURL('/vendor/jamesdsp/dsp/jamesdsp.wasm','./dsp/jamesdsp.wasm'), workletURL=assetURL('/vendor/jamesdsp/worklet.mjs','./worklet.mjs')}={}) {
    if (!Number.isFinite(context.sampleRate)||context.sampleRate<8000||context.sampleRate>96000) throw new RangeError('AudioContext rate must be 8–96 kHz');
    if (!moduleLoads.has(context)) moduleLoads.set(context,new Map());
    const cache=moduleLoads.get(context), key=String(workletURL);
    if (!cache.has(key)) cache.set(key,context.audioWorklet.addModule(workletURL).catch(e=>{cache.delete(key);throw e;}));
    const response=await fetch(wasmURL);
    if (!response.ok) throw new Error(`WASM fetch failed: ${response.status}`);
    const wasmBytes=await response.arrayBuffer();
    await cache.get(key);
    const wrapper=new JamesDSPNode(context,wasmBytes);
    try { await wrapper.ready; return wrapper; } catch(e) { wrapper.destroy(); throw e; }
  }
  constructor(context,wasmBytes) {
    super(); this.context=context; this.defaultParams=Object.fromEntries(Object.entries(DEFAULT_PARAMS).filter(([name])=>!/^(?:liveprog|ddc|arbitrary)\./.test(name))); this.params={...this.defaultParams}; this.pending=new Map(); this.serial=0; this.destroyed=false; this.source=null; this.irRef=null;
    this.node=new AudioWorkletNode(context,'jamesdsp',{numberOfInputs:1,numberOfOutputs:1,outputChannelCount:[2],channelCount:2,channelCountMode:'explicit',processorOptions:{wasmBytes}});
    this.ready=new Promise((resolve,reject)=> {
      const timer=setTimeout(()=>reject(new Error('DSP initialization timed out')),15000);
      this.node.onprocessorerror=()=>{const error=new Error('DSP processor stopped');clearTimeout(timer);reject(error);this.fail(error);};
      this.node.port.onmessage=({data})=> {
        if(data.type==='ready') {clearTimeout(timer);resolve();}
        else if(data.type==='reply') { const p=this.pending.get(data.id); if(p) {this.pending.delete(data.id);clearTimeout(p.timer);data.error?p.reject(new Error(data.error)):p.resolve(data.result);} }
        else if(data.type==='error') {const error=new Error(data.error); clearTimeout(timer); reject(error); this.fail(error);}
        else this.dispatchEvent(new CustomEvent(data.type,{detail:data}));
      };
    });
  }
  fail(error) { for(const p of this.pending.values()) {clearTimeout(p.timer);p.reject(error);} this.pending.clear();this.dispatchEvent(new CustomEvent('error',{detail:error})); }
  request(type,data={},transfer=[]) {
    if(this.destroyed) return Promise.reject(new Error('DSP has been destroyed'));
    const id=++this.serial;
    return new Promise((resolve,reject)=> {
      const timer=setTimeout(()=>{this.pending.delete(id);reject(new Error(`DSP ${type} timed out`));},15000);
      this.pending.set(id,{resolve,reject,timer});this.node.port.postMessage({type,id,...data},transfer);
    });
  }
  // One source → this DSP → destination. For arbitrary graphs use .node directly.
  connect(source,destination=this.context.destination) {
    if(this.destroyed) throw new Error('DSP has been destroyed');
    if(this.source) this.source.disconnect(this.node);
    this.node.disconnect();this.source=source;source.connect(this.node);this.node.connect(destination);return destination;
  }
  async setParam(name,value) {if(/^(?:liveprog|ddc|arbitrary)\./.test(name))throw new Error('Text effects are disabled in this player version');validateParam(name,value);await this.request('param',{name,value});this.params[name]=value;}
  setBypass(enabled) {return this.setParam('bypass',Number(Boolean(enabled)));}
  async setText(effect,text) {
    throw new Error('Text effects are disabled in this player version');
  }
  async loadIR(buffer,reference=null) {
    buffer=prepareIR(this.context,buffer,{normalize:false});
    const internalRate=this.context.sampleRate===44100?44100:48000;
    buffer=resampleIR(buffer,internalRate);
    if(![1,2,4].includes(buffer.numberOfChannels) || buffer.length>65536 || buffer.length<1) throw new RangeError('IR must have 1, 2, or 4 channels and at most 65536 frames');
    const pcm=new Float32Array(buffer.length*buffer.numberOfChannels);
    for(let ch=0;ch<buffer.numberOfChannels;ch++) {const data=buffer.getChannelData(ch);for(let i=0;i<buffer.length;i++) pcm[i*buffer.numberOfChannels+ch]=data[i];}
    await this.request('ir',{pcm,frames:buffer.length,channels:buffer.numberOfChannels,sourceRate:internalRate},[pcm.buffer]);this.params['convolver.enabled']=0;this.irRef=reference?{name:reference.name,hash:reference.hash}:null;
  }
  async getInfo() {const {bytes,heapBytes}=await this.request('info');const view=new DataView(bytes);return {abiVersion:view.getUint32(0,true),structBytes:view.getUint32(4,true),contextRate:view.getFloat32(8,true),internalRate:view.getFloat32(12,true),srcBackend:view.getUint32(16,true),latencyFrames:view.getUint32(20,true),irChannels:view.getUint32(24,true),irFrames:view.getUint32(28,true),irCapFrames:view.getUint32(32,true),headFrames:view.getUint32(36,true),tailFrames:view.getUint32(40,true),liveBytes:view.getUint32(44,true),peakBytes:view.getUint32(48,true),faults:view.getUint32(52,true),underruns:view.getUint32(56,true),overflows:view.getUint32(60,true),heapBytes};}
  async applyPreset(preset) {
    // All keys validated before mutation; applying a preset resets unspecified params.
    if(preset?.texts && Object.keys(preset.texts).length) throw new Error('Text effects are disabled in this player version');
    const params={...this.defaultParams,...(preset.params||preset)};
    for(const [name,value] of Object.entries(params)) {if(/^(?:liveprog|ddc|arbitrary)\./.test(name))throw new Error('Text effects are disabled in this player version');validateParam(name,value);}
    if(preset.irRef) {const saved=await getIR(preset.irRef.name);if(!saved||saved.hash!==preset.irRef.hash)throw new Error(`Preset IR is missing or changed: ${preset.irRef.name}`);await this.loadIR(saved.buffer,preset.irRef);}
    // Configure before enabling; the referenced IR is loaded first.
    for(const [name,value] of Object.entries(params).sort(([a],[b])=>Number(a.endsWith('.enabled'))-Number(b.endsWith('.enabled')))) await this.setParam(name,value);
  }
  toJSON() {return {version:2,params:{...this.params},...(this.irRef?{irRef:{...this.irRef}}:{})};}
  destroy() {
    if(this.destroyed) return;
    if(this.source) {try {this.source.disconnect(this.node);} catch {}} this.node.disconnect();
    this.node.port.postMessage({type:'destroy'});this.destroyed=true;this.fail(new Error('DSP destroyed'));this.node.port.close();
  }
 }
--- a/frontend/vendor/jamesdsp/params.mjs
+++ b/frontend/vendor/jamesdsp/params.mjs
@@ -0,0 +1,31 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 export const EQ_FREQUENCIES = [25,40,63,100,160,250,400,630,1000,1600,2500,4000,6300,10000,16000];
 export const COMP_FREQUENCIES = [95,200,400,800,1600,3400,7500];
 export const EFFECTS = ['eq','compressor','bass','stereo','reverb','crossfeed','spatial','tube','convolver','liveprog','ddc','arbitrary'];
 export const PARAMS = {
  bypass:[0,1,0], gain:[-24,12,0],
  'limiter.threshold':[-24,0,-0.1], 'limiter.release':[10,1000,100],
  'eq.mode':[0,5,1], 'eq.interpolation':[0,1,0],
  'compressor.time':[0.01,2,0.1], 'compressor.mode':[0,3,3], 'compressor.granularity':[0,4,0],
  'bass.boost':[0,12,6], 'stereo.mix':[0,1,0.5], 'reverb.preset':[0,18,0],
  'convolver.mix':[0,1,1], 'convolver.predelayMs':[0,250,0],
  'crossfeed.mode':[0,5,0], 'tube.drive':[-12,12,0],
  'spatial.mode':[2,6,2], 'spatial.azimuth':[-90,90,0], 'spatial.spread':[0,120,60],
  'spatial.distance':[0.5,5,1], 'spatial.room':[0,1,0], 'spatial.centerDb':[0,6,0], 'spatial.mix':[0,1,1],
 };
 for (const effect of EFFECTS) PARAMS[`${effect}.enabled`] = [0,1,0];
 EQ_FREQUENCIES.forEach((_, i) => PARAMS[`eq.band${i}`] = [-12,12,0]);
 COMP_FREQUENCIES.forEach((_, i) => PARAMS[`compressor.band${i}`] = [-12,12,0]);
 export const DEFAULT_PARAMS = Object.fromEntries(Object.entries(PARAMS).map(([k,v])=>[k,v[2]]));
 export function validateParam(name, value) {
  const spec=PARAMS[name];
  if (!spec || typeof value!=='number' || !Number.isFinite(value) || value<spec[0] || value>spec[1]) throw new RangeError(`Invalid parameter ${name}: ${value}`);
  if ((name.endsWith('.enabled') || /mode|preset|granularity|interpolation|bypass/.test(name)) && !Number.isInteger(value)) throw new RangeError(`${name} requires an integer`);
 }
 export const PRESETS = {
  Flat: {},
  'Warm lows': {'eq.band0':4,'eq.band1':4,'eq.band2':3,'eq.band3':2,'eq.enabled':1,'gain':-3},
  'Headphones': {'crossfeed.enabled':1,'crossfeed.mode':1,'eq.band8':-2,'eq.enabled':1},
  'Small room': {'reverb.preset':7,'reverb.enabled':1,'gain':-3},
  'Virtual speakers': {'spatial.enabled':1,'spatial.mode':6,'spatial.spread':90},
 };
--- a/frontend/vendor/jamesdsp/worklet.mjs
+++ b/frontend/vendor/jamesdsp/worklet.mjs
@@ -0,0 +1,57 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 import createJamesDSP from './dsp/jamesdsp-a982b53.mjs';
 class JamesDSPProcessor extends AudioWorkletProcessor {
  constructor(options) {
    super(); this.closed=false;this.failed=false;
    this.initialize(options);
  }
  async initialize(options) {
    try {
      this.wasm=await createJamesDSP({wasmBinary:options.processorOptions.wasmBytes,locateFile:()=>'jamesdsp.wasm',print:()=>{},printErr:()=>{}});
      this.handle=this.wasm._jdsp_create(sampleRate);
      this.pointer=this.wasm._malloc(128*2*4);
      if(!this.handle || !this.pointer) throw new Error('DSP allocation failed or sample rate unsupported');
      this.audio=this.wasm.HEAPF32.subarray(this.pointer/4,this.pointer/4+256);
      this.port.onmessage=({data})=>this.message(data);
      this.port.postMessage({type:'ready'});
    } catch(error) {this.failed=true;this.port.postMessage({type:'error',error:String(error)});}
  }
  string(value,fn) {
    const utf8=encodeURIComponent(value+'\0').replace(/%([0-9A-F]{2})/g,(_,hex)=>String.fromCharCode(parseInt(hex,16)));
    const bytes=Uint8Array.from(utf8,c=>c.charCodeAt(0)), p=this.wasm._malloc(bytes.length);
    if(!p) throw new Error('DSP text allocation failed');
    try {this.wasm.HEAPU8.set(bytes,p);return fn(p);} finally {this.wasm._free(p);}
  }
  message(data) {
    if(data.type==='destroy') {if(this.handle) this.wasm._jdsp_destroy(this.handle);if(this.pointer) this.wasm._free(this.pointer);this.closed=true;return;}
    try {
      let result;
      if(data.type==='param') result=this.string(data.name,p=>this.wasm._jdsp_set_param(this.handle,p,data.value));
      else if(data.type==='ir') {
        const p=this.wasm._malloc(data.pcm.byteLength);if(!p) throw new Error('IR allocation failed');
        try {this.wasm.HEAPF32.set(data.pcm,p/4);result=this.wasm._jdsp_load_ir_ex(this.handle,p,data.frames,data.channels,data.sourceRate);} finally {this.wasm._free(p);}
      } else if(data.type==='info') {
        const p=this.wasm._malloc(64);if(!p)throw new Error('DSP info allocation failed');
        try {result=this.wasm._jdsp_get_info(this.handle,p);if(result===0){const bytes=this.wasm.HEAPU8.slice(p,p+64);this.port.postMessage({type:'reply',id:data.id,result:{bytes:bytes.buffer,heapBytes:this.wasm.HEAPU8.buffer.byteLength}},[bytes.buffer]);return;}} finally {this.wasm._free(p);}
      } else throw new Error('Unknown DSP message');
      if(result!==0) throw new Error(`DSP rejected ${data.name||data.effect||data.type}`);
      this.port.postMessage({type:'reply',id:data.id,result});
    } catch(error) {this.port.postMessage({type:'reply',id:data.id,error:String(error)});}
  }
  process(inputs,outputs) {
    if(this.closed) return false;
    const out=outputs[0], input=inputs[0];
    if(!out?.length || this.failed || !this.handle) return true;
    // Mono duplicates to stereo; missing input becomes silence, preserving tails.
    for(let offset=0;offset<out[0].length;offset+=128) {
      const n=Math.min(128,out[0].length-offset);
      for(let i=0;i<n;i++) {this.audio[i*2]=input[0]?.[offset+i]||0;this.audio[i*2+1]=(input[1]||input[0])?.[offset+i]||0;}
      try {
        if(this.wasm._jdsp_process(this.handle,this.pointer,n)!==0) throw new Error('DSP produced nonfinite output');
        for(let i=0;i<n;i++) {out[0][offset+i]=this.audio[i*2];if(out[1]) out[1][offset+i]=this.audio[i*2+1];}
      } catch(error) {out.forEach(channel=>channel.fill(0));this.failed=true;this.port.postMessage({type:'error',error:String(error)});break;}
    }
    return true;
  }
 }
 registerProcessor('jamesdsp',JamesDSPProcessor);
--- a/frontend/views-core.js
+++ b/frontend/views-core.js
@@ -1,4 +1,18 @@
 /* Eager UI definitions. Read app lexical state only when called after initialization. */
 function parseJamesDspPreset(text) {
  const imported = typeof text === 'string' ? JSON.parse(text) : text;
  const allowed = /^(?:eq\.band(?:[0-9]|1[0-4])|compressor\.band[0-6]|(?:eq|compressor|bass|stereo|reverb|crossfeed|tube|convolver)\.enabled|(?:gain|limiter\.threshold|limiter\.release|eq\.mode|eq\.interpolation|compressor\.time|compressor\.mode|compressor\.granularity|bass\.boost|stereo\.mix|reverb\.preset|crossfeed\.mode|tube\.drive))$/;
  if (imported?.version !== 1 || imported?.texts || !imported?.params || typeof imported.params !== 'object' || Array.isArray(imported.params)) throw new Error('This file is not a supported preset (text effects are disabled).');
  const range = key => key.startsWith('eq.band') || key.startsWith('compressor.band') ? [-12, 12] : ({ gain: [-24, 12], 'limiter.threshold': [-24, 0], 'limiter.release': [10, 1000], 'eq.mode': [0, 5], 'eq.interpolation': [0, 1], 'compressor.time': [0.01, 2], 'compressor.mode': [0, 3], 'compressor.granularity': [0, 4], 'bass.boost': [0, 12], 'stereo.mix': [0, 1], 'reverb.preset': [0, 18], 'crossfeed.mode': [0, 5], 'tube.drive': [-12, 12] }[key] || (key.endsWith('.enabled') ? [0, 1] : null));
  for (const [key, value] of Object.entries(imported.params)) {
    const bounds = range(key);
    if (!allowed.test(key) || typeof value !== 'number' || !Number.isFinite(value) || !bounds || value < bounds[0] || value > bounds[1] || (key === 'convolver.enabled' && value !== 0)) throw new Error(`Unsupported preset setting: ${key}`);
    if ((key.endsWith('.enabled') || /mode|preset|granularity|interpolation/.test(key)) && !Number.isInteger(value)) throw new Error(`Preset setting must be a whole number: ${key}`);
  }
  const presets = ['flat', 'bass', 'vocal', 'loudness', 'headphone', 'bright', 'warm'];
  return { preset: presets.includes(imported.preset) ? imported.preset : 'flat', params: { ...imported.params } };
 }
 async function renderLibrary() {
  els.listTitle.textContent = 'Library';
  resetListHeaderExtras();
@@ -44,7 +58,7 @@ function renderNotesView() {
  // Most recently played first (history order), the rest after.
  const order = new Map(data.history.map((v, i) => [v.id, i]));
  groups.sort((a, b) => (order.has(a.id) ? order.get(a.id) : 1e9) - (order.has(b.id) ? order.get(b.id) : 1e9));
-  els.listActions.innerHTML = groups.length ? '<button class="np-btn" id="notesExportBtn" type="button">⤓ Export Markdown</button>' : '';
+  els.listActions.innerHTML = groups.length ? `<button class="np-btn" id="notesExportBtn" type="button">${MediaIcons.svg('download')} Export Markdown</button>` : '';
  const c = els.cards;
  if (!groups.length) {
    c.innerHTML = `
@@ -130,8 +144,8 @@ function setListPaneHidden(hidden) {
 const LIST_ICONS = {
  rename: '<path d="M4 20h4L19 9l-4-4L4 16v4zM14 6l4 4"/>',
  share: '<path d="M10 14a4 4 0 0 0 5.66 0l3-3a4 4 0 0 0-5.66-5.66l-1 1"/><path d="M14 10a4 4 0 0 0-5.66 0l-3 3a4 4 0 0 0 5.66 5.66l1-1"/>',
-  offline: '<path d="M12 4v11M7 10l5 5 5-5M5 20h14"/>',
+  offline: '<use href="#media-download"/>',
-  offlineDone: '<path d="M5 12.5l4.5 4.5L19 7.5"/>',
+  offlineDone: '<use href="#media-offline"/>',
  pin: '<path d="M9 3h6l-1 6 4 4H6l4-4zM12 13v8"/>',
  select: '<rect x="4" y="4" width="16" height="16" rx="3"/><path d="M8 12l3 3 5-6"/>',
  del: '<path d="M4 7h16M9 7V4h6v3M6 7l1 13h10l1-13M10 11v6M14 11v6"/>',
@@ -222,7 +236,7 @@ function renderList() {
    els.listTitle.textContent = 'Queue';
    if (list.length) {
      const playAll = document.createElement('button');
-      playAll.textContent = '▶ Play queue';
+      playAll.innerHTML = TransportIcons.svg('play') + ' Play queue';
      playAll.onclick = () => playQueue(0);
      const clear = document.createElement('button');
      clear.textContent = 'Clear';
@@ -234,7 +248,7 @@ function renderList() {
    els.listTitle.textContent = sp ? sp.label : 'Auto Playlist';
    if (list.length) {
      const playAll = document.createElement('button');
-      playAll.textContent = '▶ Play all';
+      playAll.innerHTML = TransportIcons.svg('play') + ' Play all';
      playAll.onclick = () => playFromList(list.slice(), 0, 'smart:' + view.smartType);
      const queueAll = document.createElement('button');
      queueAll.textContent = '＋ Queue all';
@@ -245,7 +259,7 @@ function renderList() {
    els.listTitle.textContent = channelData.name || 'Channel';
    if (list.length) {
      const playAll = document.createElement('button');
-      playAll.textContent = '▶ Play all';
+      playAll.innerHTML = TransportIcons.svg('play') + ' Play all';
      playAll.onclick = () => playFromList(channelData.results.slice(), 0, 'channel');
      const queueAll = document.createElement('button');
      queueAll.textContent = '＋ Queue all';
@@ -261,11 +275,11 @@ function renderList() {
        $('listSub').textContent = `${pl.videos.length} track${pl.videos.length === 1 ? '' : 's'}${secs ? ' · ' + (h ? h + 'h ' : '') + m + 'm' : ''}`; }
      renderP2pStrip();
      const playAll = document.createElement('button');
-      playAll.textContent = '▶ Play all';
+      playAll.innerHTML = TransportIcons.svg('play') + ' Play all';
      playAll.className = 'la-primary';
      playAll.onclick = () => { if (pl.videos.length) playFromList(pl.videos, 0, 'playlist:' + pl.id); };
      const playFull = document.createElement('button');
-      playFull.textContent = '▶ Play in full';
+      playFull.innerHTML = TransportIcons.svg('play') + ' Play in full';
      playFull.className = 'la-main';
      playFull.dataset.sub = 'Start to finish';
      playFull.title = 'Play every video start to finish — ignores saved positions and A-B loops, stops after the last one';
@@ -360,7 +374,7 @@ function renderList() {
      addBrowseCta(empty, '🔍  Search videos');
    } else if (view.type === 'queue') {
      empty.innerHTML = `
-        <div class="empty-icon">▶</div>
+        <div class="empty-icon">${TransportIcons.svg('play')}</div>
        <h3 class="empty-title">Your queue is empty</h3>
        <p class="empty-desc">Use <strong>+ Queue</strong> on any video to line it up. The queue is temporary and plays in order.</p>
      `;
@@ -416,7 +430,7 @@ async function renderP2pStrip() {
    const v = { id: it.id, title: it.title || videoTitleById(it.id) || it.id, channel: it.channel || '', duration: it.duration || 0, thumbnail: `https://i.ytimg.com/vi/${it.id}/mqdefault.jpg` };
    const row = document.createElement('div');
    row.className = 'ps-row';
-    row.innerHTML = '<span class="ps-ic">📡</span><span class="ps-txt"><b></b><small></small></span><button type="button" class="ps-dl" aria-label="Save to this device">⤓</button>';
+    row.innerHTML = `<span class="ps-ic">📡</span><span class="ps-txt"><b></b><small></small></span><button type="button" class="ps-dl" aria-label="Save to this device">${MediaIcons.svg('download')}</button>`;
    row.querySelector('b').textContent = v.title;
    row.querySelector('small').textContent = `${fmtBytes(it.size)}${it.height ? ' · ' + it.height + 'p' : ''} · ${it.online ? 'Online' : 'Offline'}`;
    row.querySelector('.ps-dl').onclick = () => exportToDevice(v);
@@ -492,7 +506,7 @@ async function renderP2pList() {
  refresh.setAttribute('aria-label', 'Refresh');
  refresh.onclick = () => renderP2pList();
  const playAll = document.createElement('button');
-  playAll.textContent = '▶ Play all';
+  playAll.innerHTML = TransportIcons.svg('play') + ' Play all';
  playAll.className = 'la-primary la-inline';
  playAll.onclick = () => { if (list.length) playFromList(list, 0, 'p2p'); };
  els.listActions.append(playAll, refresh);
@@ -517,7 +531,7 @@ async function renderP2pList() {
        <div class="card-title"></div>
        <div class="card-channel">${state} · ${it.holders} device${it.holders === 1 ? '' : 's'} · ${fmtBytes(it.size)}${it.height ? ' · ' + it.height + 'p' : ''}${it.stale ? ' · <i>not checked lately</i>' : ''}</div>
      </div>
-      <button class="card-act" data-act="export" title="Save to this device" aria-label="Save to this device">⤓</button>
+      <button class="card-act" data-act="export" title="Save to this device" aria-label="Save to this device">${MediaIcons.svg('download')}</button>
      <button class="card-act" data-act="add" title="Add to a playlist" aria-label="Add to a playlist">＋</button>`;
    row.querySelector('.card-title').textContent = v.title;
    row.addEventListener('click', (e) => {
@@ -550,7 +564,7 @@ async function renderSaved() {
    const empty = document.createElement('div');
    empty.className = 'empty-state';
    empty.innerHTML = `
-      <div class="empty-icon">💾</div>
+      <div class="empty-icon">${MediaIcons.svg('offline')}</div>
      <h3 class="empty-title">Offline cache unavailable</h3>
      <p class="empty-desc">This build doesn't support saving videos for offline playback.</p>`;
    c.appendChild(empty);
@@ -566,9 +580,9 @@ async function renderSaved() {
    const empty = document.createElement('div');
    empty.className = 'empty-state';
    empty.innerHTML = `
-      <div class="empty-icon">💾</div>
+      <div class="empty-icon">${MediaIcons.svg('offline')}</div>
      <h3 class="empty-title">Nothing saved yet</h3>
-      <p class="empty-desc">Use <strong>⬇ Save</strong> while playing, or add videos to a playlist to keep them offline.</p>`;
+      <p class="empty-desc">Use <strong>${MediaIcons.svg('download')} Save</strong> while playing, or add videos to a playlist to keep them offline.</p>`;
    addBrowseCta(empty, '🔍  Find videos');
    c.appendChild(empty);
    return;
@@ -718,10 +732,19 @@ async function renderSettings() {
  const qOptions = qualities
    .map((q) => `<option value="${q}"${data.settings.quality === q ? ' selected' : ''}>${q === 'auto' ? 'Auto' : q}</option>`)
    .join('');
  const jamesDsp = data.settings.jamesDsp || { enabled: false, downloadForOffline: false, preset: 'flat', params: {}, irRef: null };
  const dspCores=Number(navigator.hardwareConcurrency), dspMemory=Number(navigator.deviceMemory);
  const dspLowEnd=(dspCores>0&&dspCores<=4)||(dspMemory>0&&dspMemory<=4);
  const dspBands = [25, 40, 63, 100, 160, 250, 400, 630, 1000, 1600, 2500, 4000, 6300, 10000, 16000];
  const dspParamDefaults = { 'bass.boost': 6, 'stereo.mix': 0.5, 'limiter.threshold': -0.1, 'convolver.mix': 1, 'convolver.predelayMs': 0, 'spatial.mode': 6, 'spatial.spread': 60, 'spatial.distance': 1, 'spatial.mix': 1 };
  const dspParam = key => Number.isFinite(Number(jamesDsp.params?.[key])) ? Number(jamesDsp.params[key]) : (dspParamDefaults[key] ?? 0);
  const dspRange = (key, label, min, max, step = 1, unit = '') => `<label class="set-row dsp-param-row"><span>${label}<small>${dspParam(key)}${unit}</small></span><input type="range" data-dsp-param="${key}" min="${min}" max="${max}" step="${step}" value="${dspParam(key)}" /></label>`;
  const dspBandRows = dspBands.map((hz, i) => dspRange(`eq.band${i}`, `${hz >= 1000 ? (hz / 1000) + ' kHz' : hz + ' Hz'}`, -12, 12, 0.5, ' dB')).join('');
-  const sel = (id, val, opts) => `<select id="${id}" class="set-select">` +
+  const sel = (id, val, opts) => `<span class="set-control-wrap"><select id="${id}" class="set-select">` +
    opts.map(([v, label]) => `<option value="${v}"${val === v ? ' selected' : ''}>${label}</option>`).join('') +
-    `</select>`;
+    `</select></span>`;
  const dspBuiltinIRSelect = `<select id="setDspBuiltinIR" class="set-select">${['Small room','Hall','Plate','Cathedral'].map(name=>`<option value="${name}"${dspLowEnd&&name!=='Small room'?' disabled':''}>${name}</option>`).join('')}</select>`;
  wrap.innerHTML = `
    <div class="set-group">
@@ -788,6 +811,50 @@ async function renderSettings() {
        </span>
        <input id="setLiveAudioIOS" type="checkbox" ${data.settings.liveAudioIOS ? 'checked' : ''} />
      </label>` : ''}
      <div class="dsp-settings" id="jamesDspSettings">
        <div class="set-group-title">Sound engine</div>
        <label class="set-row"><span>Engine<small>Standard is the default. JamesDSP replaces the Standard EQ and vocal/stereo stages.</small></span>
          ${sel('setSoundEngine', jamesDsp.enabled ? 'jamesdsp' : 'standard', [['standard', 'Standard'], ['jamesdsp', 'JamesDSP']])}
        </label>
        <label class="set-row"><span>Download audio effects for offline<small>Includes the optional JamesDSP engine and its large WASM file in the offline cache.</small></span><input id="setDspOffline" type="checkbox" ${jamesDsp.downloadForOffline ? 'checked' : ''} /></label>
        <div id="jamesDspControls" ${jamesDsp.enabled ? '' : 'hidden'}>
          <div class="set-row"><span>Live processing<small>${EQ.isIOS() ? 'On iPhone, enable Live sound processing above first. Audio may stop when the screen locks.' : 'Processing runs on this device.'}</small></span></div>
          ${dspLowEnd ? '<p class="dsp-risk" role="note">This device may have limited audio headroom. Long impulse responses are disabled and the short room response is capped at 0.5 seconds.</p>' : ''}
          <label class="set-row"><span>Preset</span>${sel('setDspPreset', jamesDsp.preset || 'flat', [['flat', 'Flat'], ['bass', 'Bass boost'], ['vocal', 'Vocal'], ['loudness', 'Loudness'], ['headphone', 'Headphone crossfeed'], ['bright', 'Bright'], ['warm', 'Warm']])}</label>
          <div class="dsp-param-list" aria-label="15-band equalizer">${dspBandRows}</div>
          <label class="set-row"><span>Bass boost<small>${dspParam('bass.boost')} dB</small></span><input type="range" data-dsp-param="bass.boost" min="0" max="12" step="0.5" value="${dspParam('bass.boost')}" /></label>
          <label class="set-row"><span>Stereo width<small>${Math.round(dspParam('stereo.mix') * 100)}%</small></span><input type="range" data-dsp-param="stereo.mix" min="0" max="1" step="0.05" value="${dspParam('stereo.mix')}" /></label>
          <label class="set-row"><span>Crossfeed mode</span>${sel('setDspCrossfeed', String(dspParam('crossfeed.mode')), [['0', 'Off'], ['1', 'Gentle'], ['2', 'Natural'], ['3', 'Wide'], ['4', 'Diffuse'], ['5', 'Strong']])}</label>
          <label class="set-row"><span>Reverb preset</span>${sel('setDspReverb', String(dspParam('reverb.preset')), Array.from({ length: 19 }, (_, i) => [String(i), i === 0 ? 'Off' : `Room ${i}`]))}</label>
          <label class="set-row"><span>Tube drive<small>${dspParam('tube.drive')} dB</small></span><input type="range" data-dsp-param="tube.drive" min="-12" max="12" step="0.5" value="${dspParam('tube.drive')}" /></label>
          <label class="set-row"><span>Limiter threshold<small>${dspParam('limiter.threshold')} dB</small></span><input type="range" data-dsp-param="limiter.threshold" min="-24" max="0" step="0.5" value="${dspParam('limiter.threshold')}" /></label>
          <label class="set-row"><span>Output gain<small>${dspParam('gain')} dB</small></span><input type="range" data-dsp-param="gain" min="-24" max="12" step="0.5" value="${dspParam('gain')}" /></label>
          <label class="set-row"><span>Compressor</span><input id="setDspCompressor" type="checkbox" ${dspParam('compressor.enabled') ? 'checked' : ''} /></label>
          <div class="dsp-actions"><button id="dspPresetImportBtn" class="btn" type="button">Import preset JSON</button><button id="dspPresetExportBtn" class="btn" type="button">Export preset JSON</button><button id="dspResetBtn" class="btn" type="button">Reset DSP</button></div>
          <input id="dspPresetFile" type="file" accept="application/json,.json" hidden />
          <section class="dsp-subsection" aria-labelledby="dspConvolverTitle">
            <h4 id="dspConvolverTitle">Convolver</h4>
            <label class="set-row"><span>Enable convolution</span><input id="setDspConvolver" type="checkbox" ${dspParam('convolver.enabled') ? 'checked' : ''} /></label>
            <label class="set-row"><span>Dry / wet<small>${Math.round(dspParam('convolver.mix')*100)}%</small></span><input type="range" data-dsp-param="convolver.mix" min="0" max="1" step="0.01" value="${dspParam('convolver.mix')}" /></label>
            <label class="set-row"><span>Pre-delay<small>${dspParam('convolver.predelayMs')} ms</small></span><input type="range" data-dsp-param="convolver.predelayMs" min="0" max="250" step="1" value="${dspParam('convolver.predelayMs')}" /></label>
            <label class="set-row"><span>Built-in response</span><span class="set-control-wrap">${dspBuiltinIRSelect}</span></label>
            <button id="setDspLoadBuiltin" class="btn" type="button">Generate and load</button>
            <label class="set-row dsp-upload-row"><span>Upload impulse response<small>WAV or other browser-decodable audio; up to 65,536 frames at the internal sample rate.</small></span><span class="dsp-file-control"><input id="dspIrFile" type="file" accept="audio/*,.wav" aria-label="Upload impulse response" /><button id="dspIrChooseFile" class="dsp-file-button" type="button">Choose file</button><span class="dsp-file-name" id="dspIrFileName" aria-live="polite">No file chosen</span></span></label>
            <label class="set-row"><span>Stored responses</span><span class="set-control-wrap"><select id="setDspSavedIR" class="set-select"><option value="">Choose a saved response</option></select></span></label>
            <button id="setDspLoadSavedIR" class="btn" type="button">Load saved response</button>
            <p id="dspIrStatus" class="sp-note">${jamesDsp.irRef?.name ? `Loaded: ${jamesDsp.irRef.name}` : 'No impulse response loaded.'}</p>
          </section>
          <section class="dsp-subsection" aria-labelledby="dspSpatialTitle">
            <h4 id="dspSpatialTitle">3D spatial stage</h4>
            <label class="set-row"><span>Enable 3D spatial stage</span><input id="setDspSpatial" type="checkbox" ${dspParam('spatial.enabled') ? 'checked' : ''} /></label>
            <label class="set-row"><span>HRTF / renderer mode</span>${sel('setDspSpatialMode',String(dspParam('spatial.mode')),[['2','HRTF crossfeed'],['3','HRTF surround 1'],['4','HRTF surround 2'],['5','HRTF surround 3'],['6','Virtual speakers']])}</label>
            ${dspRange('spatial.azimuth','Azimuth',-90,90,1,'°')}
            ${dspRange('spatial.spread','Speaker spread',0,120,1,'°')}
            ${dspRange('spatial.distance','Distance',0.5,5,0.1,' m')}
            ${dspRange('spatial.centerDb','Center boost',0,6,0.1,' dB')}
          </section>
        </div>
      </div>
      <label class="set-row">
        <span>Default volume</span>
        <input id="setVolume" type="range" min="0" max="1" step="0.01" value="${data.settings.volume}" />
@@ -843,6 +910,7 @@ async function renderSettings() {
    <div class="set-group">
      <div class="set-group-title">Offline cache</div>
      <div class="set-row"><span>App &amp; features</span><small id="offlineAssetStatus" role="status">Checking offline readiness…</small></div>
      <label class="set-row">
        <span>
          Auto-save playlist videos
@@ -903,7 +971,7 @@ async function renderSettings() {
    <div class="set-group">
      <div class="set-group-title">Playlists</div>
      <div class="set-row" style="border:none;gap:8px;flex-wrap:wrap">
-        <button id="importYtBtn" class="btn">⬇ Import from YouTube</button>
+        <button id="importYtBtn" class="btn">${MediaIcons.svg('download')} Import from YouTube</button>
        <button id="exportBtn" class="btn">Export playlists</button>
        <button id="importBtn" class="btn">Import playlists</button>
        <input id="fileInput" type="file" accept=".json" style="display:none" />
@@ -975,7 +1043,7 @@ async function renderSettings() {
        <button id="profileShareBtn" class="btn"${profileShareUrl() ? '' : ' style="display:none"'}>↗ Share</button>
        <button id="profileUnlinkBtn" class="btn danger"${data.profile && data.profile.name ? '' : ' style="display:none"'}>Unlink</button>
        <button id="profileProtectBtn" class="btn"${data.profile && data.profile.name ? '' : ' style="display:none"'}>🔒 Protect…</button>
-        <button id="profileExportCredBtn" class="btn" style="display:none">⤓ Credentials file</button>
+        <button id="profileExportCredBtn" class="btn" style="display:none">${MediaIcons.svg('download')} Credentials file</button>
        <button id="profileImportCredBtn" class="btn">⤒ Import credentials</button>
        <input id="profileCredFileInput" type="file" accept=".json,application/json" hidden />
      </div>
@@ -1054,6 +1122,124 @@ async function renderSettings() {
    if (e.target.checked) toast('Live sound processing on — streamed songs go silent when the screen locks', { duration: 4500 });
  });
  const dspControls = $('jamesDspControls');
  const dspEngine = $('setSoundEngine');
  if (dspEngine) dspEngine.addEventListener('change', e => {
    const enable = e.target.value === 'jamesdsp';
    if (enable && EQ.isIOS() && !data.settings.liveAudioIOS) {
      e.target.value = 'standard';
      toast('On iPhone, turn on Live sound processing first.');
      return;
    }
    data.settings.jamesDsp = data.settings.jamesDsp || { enabled: false, downloadForOffline: false, preset: 'flat', params: {}, irRef: null };
    data.settings.jamesDsp.enabled = enable;
    if (enable) data.settings.jamesDsp.downloadForOffline = true;
    if (enable && $('setDspOffline')) $('setDspOffline').checked = true;
    if (dspControls) dspControls.hidden = !enable;
    persist();
    reportDspOfflineOptIn();
    EQ.apply();
  });
  if ($('setDspOffline')) $('setDspOffline').addEventListener('change', e => {
    data.settings.jamesDsp = data.settings.jamesDsp || { enabled: false, downloadForOffline: false, preset: 'flat', params: {} };
    data.settings.jamesDsp.downloadForOffline = e.target.checked;
    persist();
    reportDspOfflineOptIn();
    toast(e.target.checked ? 'Preparing audio effects for offline use' : 'Audio effects removed from the offline completion list');
  });
  const dspConfig = data.settings.jamesDsp || (data.settings.jamesDsp = { enabled: false, downloadForOffline: false, preset: 'flat', params: {}, irRef: null });
  let dspApplyTimer = null;
  const applyDspSettings = () => {
    clearTimeout(dspApplyTimer);
    persist();
    dspApplyTimer = setTimeout(() => { if (data.settings.jamesDsp?.enabled) EQ.apply(); }, 120);
  };
  if ($('setDspPreset')) $('setDspPreset').addEventListener('change', e => {
    dspConfig.preset = e.target.value;
    dspConfig.params = {};
    wrap.querySelectorAll('[data-dsp-param]').forEach(input => { input.value = input.dataset.dspParam === 'limiter.threshold' ? '-0.1' : '0'; });
    applyDspSettings();
  });
  wrap.querySelectorAll('[data-dsp-param]').forEach(input => input.addEventListener('input', () => {
    const value = Number(input.value);
    dspConfig.params[input.dataset.dspParam] = value;
    const small = input.closest('.set-row')?.querySelector('small');
    if (small) small.textContent = `${value}${input.dataset.dspParam === 'stereo.mix' ? '%' : input.dataset.dspParam === 'bass.boost' || input.dataset.dspParam === 'tube.drive' || input.dataset.dspParam === 'limiter.threshold' || input.dataset.dspParam === 'gain' || input.dataset.dspParam.startsWith('eq.band') ? ' dB' : ''}`;
    applyDspSettings();
  }));
  if ($('setDspCrossfeed')) $('setDspCrossfeed').addEventListener('change', e => { dspConfig.params['crossfeed.mode'] = Number(e.target.value); dspConfig.params['crossfeed.enabled'] = Number(e.target.value) ? 1 : 0; applyDspSettings(); });
  if ($('setDspConvolver')) $('setDspConvolver').addEventListener('change', e => {
    const hasIR=dspConfig.irRef||EQ.state().jamesDsp?.irRef;
    if(e.target.checked&&!hasIR){e.target.checked=false;toast('Load an impulse response first.');return;}
    dspConfig.params['convolver.enabled']=e.target.checked?1:0;applyDspSettings();
  });
  if ($('setDspSpatial')) $('setDspSpatial').addEventListener('change', e => {
    dspConfig.params['spatial.enabled']=e.target.checked?1:0;
    if(e.target.checked){dspConfig.params['crossfeed.enabled']=0;if($('setDspCrossfeed'))$('setDspCrossfeed').value='0';}
    applyDspSettings();
  });
  if ($('setDspSpatialMode')) $('setDspSpatialMode').addEventListener('change', e => {dspConfig.params['spatial.mode']=Number(e.target.value);applyDspSettings();});
  if ($('setDspReverb')) $('setDspReverb').addEventListener('change', e => { dspConfig.params['reverb.preset'] = Number(e.target.value); dspConfig.params['reverb.enabled'] = Number(e.target.value) ? 1 : 0; applyDspSettings(); });
  if ($('setDspCompressor')) $('setDspCompressor').addEventListener('change', e => { dspConfig.params['compressor.enabled'] = e.target.checked ? 1 : 0; applyDspSettings(); });
  const refreshDspIrList=async()=>{
    const select=$('setDspSavedIR');if(!select)return;
    const selected=select.value;select.replaceChildren(new Option('Choose a saved response',''));
    try{for(const item of await EQ.listDspIRs())select.add(new Option(`${item.name} · ${item.channels} ch · ${item.frames} frames`,item.name));if([...select.options].some(o=>o.value===selected))select.value=selected;}
    catch(error){if($('dspIrStatus'))$('dspIrStatus').textContent=`Saved response list unavailable: ${error.message}`;}
  };
  if ($('setDspLoadBuiltin')) $('setDspLoadBuiltin').addEventListener('click',async()=>{
    try{const name=$('setDspBuiltinIR').value;const ref=await EQ.loadDspBuiltinIR(name);if($('dspIrStatus'))$('dspIrStatus').textContent=`Loaded ${name}${ref?' and saved it for this device':' for this session only'}.`;$('setDspConvolver').checked=true;await refreshDspIrList();}
    catch(error){toast(`Impulse response failed: ${error.message}`);}
  });
  if ($('setDspLoadSavedIR')) $('setDspLoadSavedIR').addEventListener('click',async()=>{
    const name=$('setDspSavedIR').value;if(!name){await refreshDspIrList();return;}
    try{const ref=await EQ.loadDspSavedIR(name);if($('dspIrStatus'))$('dspIrStatus').textContent=`Loaded saved response: ${name}`;$('setDspConvolver').checked=true;await refreshDspIrList();}
    catch(error){toast(`Saved response failed: ${error.message}`);}
  });
  if ($('dspIrChooseFile')) $('dspIrChooseFile').addEventListener('click', e => { e.preventDefault(); $('dspIrFile')?.click(); });
  if ($('dspIrFile')) $('dspIrFile').addEventListener('change',async e=>{
    const file=e.target.files?.[0];if(!file)return;
    if($('dspIrFileName'))$('dspIrFileName').textContent=file.name;
    try{const ref=await EQ.loadDspIR(file);if($('dspIrStatus'))$('dspIrStatus').textContent=`Loaded ${ref?.name||file.name}${ref?' and saved it for this device':' for this session only'}.`;$('setDspConvolver').checked=true;await refreshDspIrList();}
    catch(error){toast(`Impulse response failed: ${error.message}`);}
    finally{e.target.value='';}
  });
  if(jamesDsp.enabled||jamesDsp.downloadForOffline)refreshDspIrList();
  if ($('dspResetBtn')) $('dspResetBtn').addEventListener('click', () => {
    dspConfig.preset = 'flat'; dspConfig.params = {};
    if ($('setDspPreset')) $('setDspPreset').value = 'flat';
    wrap.querySelectorAll('[data-dsp-param]').forEach(input => { input.value = input.dataset.dspParam === 'limiter.threshold' ? '-0.1' : '0'; });
    if ($('setDspCrossfeed')) $('setDspCrossfeed').value = '0';
    if ($('setDspReverb')) $('setDspReverb').value = '0';
    if ($('setDspCompressor')) $('setDspCompressor').checked = false;
    applyDspSettings();
    toast('JamesDSP settings reset');
  });
  if ($('dspPresetExportBtn')) $('dspPresetExportBtn').addEventListener('click', () => {
    const params = { ...(dspConfig.params || {}) }; delete params['convolver.enabled'];
    const blob = new Blob([JSON.stringify({ version: 1, preset: dspConfig.preset || 'flat', params }, null, 2)], { type: 'application/json' });
    const url = URL.createObjectURL(blob), a = document.createElement('a');
    a.href = url; a.download = 'ytplayer-jamesdsp-preset.json'; a.click(); setTimeout(() => URL.revokeObjectURL(url), 1000);
  });
  if ($('dspPresetImportBtn')) $('dspPresetImportBtn').addEventListener('click', () => $('dspPresetFile')?.click());
  if ($('dspPresetFile')) $('dspPresetFile').addEventListener('change', async e => {
    const file = e.target.files?.[0]; if (!file) return;
    try {
      if (file.size > 65536) throw new Error('Preset files must be 64 KB or smaller.');
      const imported = parseJamesDspPreset(await file.text());
      dspConfig.preset = imported.preset; dspConfig.params = imported.params;
      if ($('setDspPreset')) $('setDspPreset').value = dspConfig.preset;
      applyDspSettings(); toast('JamesDSP preset imported');
    } catch (error) { toast(error?.message || 'Could not import preset'); }
    finally { e.target.value = ''; }
  });
  if ($('dspIrFile')) $('dspIrFile').addEventListener('change', async e => {
    const file = e.target.files?.[0]; if (!file) return;
    try { await EQ.loadDspIR(file); dspConfig.params['convolver.enabled'] = 1; applyDspSettings(); toast('Impulse response loaded for this session'); }
    catch (error) { toast(error?.message || 'Could not load impulse response'); }
    finally { e.target.value = ''; }
  });
  // ---- Saved searches manager ----
  {
@@ -1186,6 +1372,8 @@ async function renderSettings() {
    fold.addEventListener('toggle', () => { try { localStorage.setItem('ytpCacheFoldOpen', fold.open ? '1' : '0'); } catch { /* blocked */ } });
  }
  window.SwUpdate?.offlineStatus().catch(() => {});
  // ---- Populate live cache stats ----
  try {
    const res = await API.cacheList();
@@ -1336,7 +1524,7 @@ function renderCard(v, index, list) {
    <div class="thumb">
      <img loading="lazy" decoding="async" src="${escapeHtml(v.thumbnail || '')}" alt="" />
      ${v.duration ? `<span class="dur">${fmtTime(v.duration)}</span>` : ''}
-      <span class="saved-badge" title="${isDownloading ? 'Downloading…' : 'Saved offline'}">${isDownloading ? '' : '⬇'}</span>
+      <span class="saved-badge" title="${isDownloading ? 'Downloading…' : 'Saved offline'}">${MediaIcons.svg('offline', 'badge-offline')}${MediaIcons.svg('progress', 'badge-progress')}</span>
      ${isDownloading ? '<div class="dl-progress"><div class="dl-bar"></div></div>' : ''}
    </div>
    <div class="card-info">
--- a/frontend/watch-party-client.js
+++ b/frontend/watch-party-client.js
@@ -347,7 +347,7 @@
    const s = st.state && st.state.v;
    panel.querySelector('.pt-body').innerHTML = `
      ${st.code ? `<div class="pt-share"><code>${escapeHtml(link())}</code><button class="np-btn" type="button" data-act="copy">Copy</button>${navigator.share ? '<button class="np-btn" type="button" data-act="share">↗</button>' : ''}</div>` : ''}
-      ${!isHost() && s ? `<div class="pt-now">▶ ${escapeHtml(s.title)}</div>` : ''}
+      ${!isHost() && s ? `<div class="pt-now">${TransportIcons.svg('play')} ${escapeHtml(s.title)}</div>` : ''}
      ${!isHost() && st.detached ? '<button class="rv-primary" type="button" data-act="resync">↻ Re-sync with the host</button>' : ''}
      <div class="pt-members">${st.members.map((m) => `<span class="pt-member${m.pid === pid ? ' me' : ''}">${m.host ? '👑 ' : ''}${escapeHtml(m.name)}${m.voice ? ' 🎤' : ''}</span>`).join('')}</div>
      ${isHost() ? `<label class="pt-toggle"><input type="checkbox" data-act="allow" ${st.allowControl ? 'checked' : ''} /> Guests can control playback</label>` : ''}
--- a/perf/README.md
+++ b/perf/README.md
@@ -74,6 +74,11 @@ Each scenario records the following metrics across **5 independent runs** (repor
 ## 4. How to Run
 ### Optional JamesDSP integration check
 `node perf/dsp.mjs --browser all` builds short local H.264/AAC test tones, exercises Standard and lazy JamesDSP presets through the real app graph, verifies A/B bypass routes directly to the unchanged Standard chain, measures generated-IR effects and the four-channel/spatial stages in an offline render, checks an arbitrary 32 kHz context, and tests stored-IR offline reload, one worklet heap, no new media sources, and corrupt-WASM fallback. The default install must omit the optional WASM; the harness then opts in through Settings and confirms completion. Detailed measurements stay in ignored `perf/.tmp/dsp-results.json`.
 `node perf/settings-persist.mjs --browser all` also round-trips a disabled, custom JamesDSP preset and the offline-audio opt-in through local storage and confirms the Standard selector remains selected.
 ### Prerequisites
 Symlink dependencies and ensure server dependencies are installed:
 ```bash
@@ -311,3 +316,197 @@ plus the source frontend build tag. WebKit does not expose the long-task API.
 Migration supports `--out` to preserve earlier phase evidence. Existing lazy
 harness results are copied to `phase4-lazy-2026-10-08.json` after each Phase 4 run
 and the Phase 3 result is restored. No production requests or deploys are needed.
 ## Phase 5 complete measurements
 ```bash
 node --test perf/measurement.test.mjs
 node perf/baseline.mjs --runs 5 --browser all --profile all --scenario all \
  --out perf/results/final-2026-10-08.json \
  --compare perf/results/baseline-2026-10-07.json
 node perf/lazy.mjs --browser all --out perf/results/phase5-lazy-2026-10-08.json
 ```
 Warm reloads now wait for verified idle asset caching before counters reset and
 assert that no application asset body transfers. CSS update totals now include
 activation and the changed inactive stylesheet's verified background cache fill,
 matching the feature-update boundary. `readyWireBytes`/`readyDuration` retain the
 blocking readiness snapshot separately. Core updates stop at blocking readiness
 because app.js is blocking. Every update asserts that the only application asset
 payload is the edited file; worker script checks/imports and index/manifest count
 as overhead in the total. Historical Phase 3/4 CSS numbers were readiness only.
 No product behavior changes are involved in these measurement corrections.
 Keep browser/build/test processes idle during full timing measurements. WebKit's
 zero long-task field means unavailable, not zero work. Autoplay-blocked/media-ready
 null results do not establish playback performance or iPhone audio continuity.
 ## UI geometry and media icons
 ```sh
 node perf/ui-geometry.mjs
 node perf/ui-icons.mjs
 node --test frontend/media-icons.test.js
 ```
 Both harnesses run Chromium and WebKit at mobile dimensions with stubbed SpeechRecognition and local Saved/Queue metadata. They serve only the frontend, block service workers and external requests, and never download media. Geometry tests cold and switched layouts, six widths (320–430), mic visible/hidden and update icon visible/hidden: center spread ≤1px, touch targets ≥40px, Saved image/text gap ≥8px, no horizontal overflow or clipped car control. `--quick` limits widths and speech cases; `--browser` selects an engine; `--frontend` selects historical fixtures. `--measure-only --label before` records known broken geometry without exiting nonzero.
 Icon checks switch the same page through four layouts × dark/light/contrast, assert SVG definitions, inherited colour, stroke family and save/progress/offline state, and save Queue/Now Playing/navigation shots. Glass Stage intentionally hides bottom navigation, so its full page is recorded instead. Any assertion failure exits nonzero. Shots and raw measurements live in git-ignored plans/ui-shots/. Full production inventory: plans/ui-icon-inventory.md. Native speech recognition, installed-PWA safe-area insets and iPhone rendering still need device verification.
 ### Cold waterfall diagnosis
 `--source-root perf/.tmp/<historical-worktree>` runs that worktree's matching
 frontend **and server**; `--frontend-commit` instead combines archived frontend
 with the current backend. Run historical comparisons sequentially to avoid CPU
 contention. The result records `sourceCommit`, `sourceRoot` and the served build.
 Every cold sample has `waterfalls`: proxy request order/start/headers/end times
 and page Resource Timing discovery/start/end times. Proxy times start when
 tracking begins; page times start at navigation. Compare within each clock,
 then use the page FCP to locate the rendering dependency.
 Pass `--assert-cold` on new builds to require exactly one positive-byte app.js
 response in every cold sample, including worker installation. Omit this assertion
 when diagnosing historical regressions.
 Phase 6 counts its fetch-owned app.js response in initial JS/CSS bytes. Since the
 bootstrap consumes that response asynchronously, DOMContentLoaded no longer means
 app execution is complete; compare the existing actual boot-done landmark.
 `--scenario warm,offline,update-js,update-css,update-feature` runs a regression
 sweep without repeating an already-completed cold acceptance run.
 ## Runtime manifest hygiene
 `server/asset-manifest.js` excludes unit tests (`*.test.js`, `*.test.mjs`),
 Markdown, text licences/data (`*.txt`), C build sources, `*.entry.js` build
 entries, `/admin.html`, and files below any `perf/` directory from the runtime
 manifest and both build-tag modes. They remain directly servable with the usual
 hash and cache headers. If a matching file is genuinely needed at runtime, add
 its exact root-relative path to the optional `include` array in
 `frontend/assets.json`; group declarations referencing excluded files fail at boot
 unless explicitly included.
 The offline completeness harness compares cache contents with the runtime
 manifest dynamically; it must not hard-code the old 151-file inventory. See
 `plans/manifest-hygiene-report.md` and `perf/results/hygiene-*.json` for the
 before/after measurements and compatibility checks.
 ## Existing-install settings preservation
 ```sh
 node perf/settings-persist.mjs --browser all --target main --allow-unsupported-webkit
 node perf/settings-persist.mjs --browser all --target 0b8e398 --allow-unsupported-webkit --out perf/results/settings-persist-live-base.json
 ```
 The harness archives b77938a and the requested target into worktree-local scratch,
 serves actual Bun servers at the same origin, sets values through Settings UI
 handlers, reloads, invokes the old banner's actual Refresh UI button, and diffs
 every `_ytpdata.settings` key and control. A real local H.264/AAC clip verifies
 OPFS storage and blob playback before/after in Chromium. A local HTTP proxy
 mocks profile timestamps for worker-owned fetches on both engines and tests
 backup import. There are no external profile writes or media requests.
 Failures exit 1. Linux WebKit has no native OPFS; without the explicit allowance
 the unverified storage capability exits 2. The allowance only skips unsupported
 storage assertions; every preservation/profile/import assertion still runs.
 No storage shim substitutes for a genuine iPhone test. Snapshot results and the
 per-key table are in `plans/settings-persist-investigation.md`.
 ## Device autosave investigation (2026-10-09)
 `autosave.mjs` starts an isolated real Bun server inside this worktree, seeds its
 media-cache DB with a three-second H.264/AAC clip, and uses 414×896 Playwright
 contexts with the Framework7 Swipe layout. It checks OPFS bytes, `cachedIds`,
 Saved and Downloads views, and both Settings handlers. Public network requests
 are blocked. No production access or YouTube download is needed.
 ```bash
 bash perf/make-shell-fixture.sh b77938a 1175f1a1d2c1
 node perf/autosave.mjs --frontend perf/fixtures/shell-1175f1a1d2c1 \
  --asset-hashing 0 --asset-sync 0 --allow-unsupported-webkit \
  --out perf/results/autosave-b77938a.json
 node perf/autosave.mjs --frontend-commit main --allow-unsupported-webkit \
  --out perf/results/autosave-main.json
 node perf/autosave.mjs --browser chromium --out perf/results/autosave-current.json
 node --test frontend/autosave.test.js
 ```
 Options: `--frontend <directory>` or `--frontend-commit <revision>`;
 `--browser chromium|webkit|all`; `--scenarios <comma-separated names>`;
 `--asset-hashing 0|1`, `--asset-sync 0|1`; `--out <json>`.
 A failed assertion exits 1. Missing native OPFS exits 2 unless explicitly
 allowed with `--allow-unsupported-webkit`. On this Linux Playwright WebKit build,
 `navigator.storage` is absent, including in persistent contexts; enabling its
 MiniBrowser storage feature flags also did not expose it. WebKit therefore
 checks real UI/settings/save guards and records `supported:false`; those results
 **do not establish a successful WebKit OPFS save**. No storage shim is installed.
 Run without the allowance on a Safari-capable environment to require native OPFS.
 Observed contracts in both b77938a and current code:
 | Action | Device save |
 | --- | --- |
 | Open a video with default settings | No |
 | Open with `saveBeforePlay:true`, video mode | Yes |
 | Open audio-only, or `preferStream:true` | No |
 | Create/add to a playlist, even with `autoPreload:false` | Yes |
 | Launch with playlist videos and `autoPreload:true` | Yes |
 | Launch with `autoPreload:false`, unpinned playlist | No |
 | Launch with a pinned playlist, even with auto-preload off | Yes |
 | Enable either save setting through Settings | Saves as above; persisted |
 Chromium: all 12 cases pass for old/current builds and Phase 1/2 tips.
 Phase 3/4/5 tips and both rollback flags pass the six positive cases
 (`open-save-first,playlist-add,playlist-boot,pinned-boot,settings-enable,settings-save-first`).
 JSON evidence is in `perf/results/autosave-*.json`. No old=saves/new=doesn't
 transition was found, so there is no defensible breaking commit or product fix.
 The unit tests cover playlist/pinning policy, duplicate saves, and failed or
 paused saves remaining retryable without being marked Saved.
 Neighbour audit: Downloads, Saved, OPFS, download controls and error helpers
 remain eager core assets. Export awaits `feature:export`; Share/External await
 `feature:share-external`; worker creation is synchronous and receives build-local
 hash/resume URLs. DirectMedia's unloaded `hasSource()` facade returns false, so
 an early paired-source lookup can choose the server instead; this does not
 prevent the server save. P2P settings counts queried before its delayed lazy
 startup can initially show no registration. These remain follow-up candidates,
 not demonstrated causes of missing OPFS saves. The scout's proposed Data Saver
 cause was rejected: its guards affect static warming and stream pre-resolution,
 not `preload()` or `saveBeforePlay`.
 Still required on the owner's installed iPhone PWA: record the running build,
 check Save before playing / Audio-only / Auto-save settings, open a fresh video,
 add it to a playlist, and inspect Downloads failure details and Saved after a
 relaunch/offline playback. Verify available storage and whether iOS evicted
 previous copies. A failing iPhone sequence is needed to continue the bisect.
 Transport controls use the same shared-definition approach as media/save icons.
 `node perf/ui-icons.mjs` also checks all four layouts × dark/light/contrast in
 Chromium and WebKit: shared monochrome symbols, accessible labels, visible
 44px targets, F7 filled glyphs, runtime layout changes, main/stage/mini/service
 play-pause state swaps, fullscreen and Car mode refreshes, and actual paired
 remote toggles against a mocked relay. Transport previews and remote screenshots
 are saved in ignored `plans/transport-shots/`. Run `node perf/ui-geometry.mjs`
 for the 320–430px search-bar and Saved-row geometry matrix. OS lock-screen buttons
 remain platform-rendered through the existing MediaSession handlers.
 Run `node perf/settings-layout.mjs` for the Settings workspace and JamesDSP
 control matrix: Chromium and WebKit, all four layouts, dark/light/contrast, and
 390/768/1280/1440/1920px widths. It checks horizontal overflow, responsive row
 geometry, themed selects and switches, the clipped native file picker, and
 button wrapping; desktop screenshots and measurements are written to
 `plans/settings-shots/`.
 ## Transient retry verification
 `retry.mjs` starts the real Bun server behind the local traffic-shaping proxy, then
 injects one HTTP 503 into search, one dropped related-video request, and one lazy
 chunk load failure. Each path must recover automatically without exposing the
 manual related/player Retry affordance. It runs Chromium and WebKit by default;
 choose `--browser chromium|webkit` and `--profile lte|lossy|unthrottled` to narrow
 it. Retry logic is limited to idempotent GET requests and chunk loads; explicit
 save/retry POST actions remain user initiated.
 ```bash
 node perf/retry.mjs --browser all --profile lossy
 ```
--- a/perf/autosave.mjs
+++ b/perf/autosave.mjs
@@ -0,0 +1,128 @@
 #!/usr/bin/env node
 // Device autosave checks against a real, isolated Bun server and a local H.264 clip.
 import assert from 'node:assert/strict';
 import { spawn, execFileSync } from 'node:child_process';
 import { mkdirSync, mkdtempSync, symlinkSync, rmSync, statSync, writeFileSync } from 'node:fs';
 import path from 'node:path';
 import { createServer } from 'node:net';
 import { createRequire } from 'node:module';
 import { chromium, webkit } from 'playwright';
 const root = path.resolve(import.meta.dirname, '..');
 const require = createRequire(import.meta.url);
 const { createClient } = require(path.join(root, 'server/node_modules/@libsql/client'));
 const args = process.argv.slice(2);
 function option(name, fallback) { const i = args.indexOf(name); return i < 0 ? fallback : args[i + 1]; }
 const target = option('--browser', 'all');
 assert.ok(['all', 'chromium', 'webkit'].includes(target));
 mkdirSync(path.join(root, 'perf/.tmp'), { recursive: true });
 const scratch = mkdtempSync(path.join(root, 'perf/.tmp/autosave-'));
 const revision = option('--frontend-commit', null);
 let tree = path.resolve(option('--frontend', path.join(root, 'frontend')));
 if (revision) {
  const archive = path.join(scratch, 'frontend.tar');
  writeFileSync(archive, execFileSync('git', ['archive', revision, 'frontend'], { cwd: root, maxBuffer: 30 * 1024 * 1024 }));
  execFileSync('tar', ['-xf', archive, '-C', scratch]);
  tree = path.join(scratch, 'frontend');
 }
 const portProbe = createServer();
 await new Promise(r => portProbe.listen(0, '127.0.0.1', r));
 const port = portProbe.address().port;
 await new Promise(r => portProbe.close(r));
 const origin = `http://127.0.0.1:${port}`;
 const clip = { id: 'benchmedia01', title: 'Autosave local clip', channel: 'Regression', duration: 3, thumbnail: '' };
 const media = path.join(scratch, 'data/media');
 mkdirSync(media, { recursive: true });
 symlinkSync(tree, path.join(scratch, 'public'));
 const mp4 = path.join(media, clip.id + '.1.mp4');
 const dbPath = path.join(scratch, 'data/test.db');
 const child = spawn('bun', [path.join(root, 'server/server.js')], { cwd: scratch, env: { ...process.env, PORT: String(port), DB_PATH: dbPath, MEDIA_DIR: media, UPLOAD_DIR: path.join(scratch, 'uploads'), DATA_DIR: path.join(scratch, 'data'), ASSET_HASHING: option('--asset-hashing', '1'), ASSET_SYNC: option('--asset-sync', '1'), BUILD_TAG: '' }, stdio: ['ignore', 'pipe', 'pipe'] });
 let serverLog = '';
 for (const stream of [child.stdout, child.stderr]) stream.on('data', c => { serverLog = (serverLog + c).slice(-5000); });
 const results = { revision: revision || tree, browsers: {}, failures: [], unsupported: [] };
 const scenarios = ['open-default', 'open-save-first', 'open-audio-only', 'open-prefer-stream', 'playlist-add', 'playlist-add-setting-off', 'playlist-existing-add', 'playlist-boot', 'playlist-boot-off', 'pinned-boot', 'settings-enable', 'settings-save-first'];
 try {
  for (let i = 0; ; i++) {
    try { if ((await fetch(origin + '/api/version')).ok) break; } catch {}
    if (i === 100 || child.exitCode !== null) throw Error('Bun server failed: ' + serverLog);
    await new Promise(r => setTimeout(r, 100));
  }
  results.buildTag = (await (await fetch(origin + '/api/version')).json()).buildTag;
 execFileSync('ffmpeg', ['-y', '-f', 'lavfi', '-i', 'color=c=blue:s=160x90:r=10:d=3', '-f', 'lavfi', '-i', 'sine=frequency=440:duration=3', '-c:v', 'libx264', '-pix_fmt', 'yuv420p', '-c:a', 'aac', '-movflags', '+faststart', '-shortest', mp4], { stdio: 'ignore' });
 execFileSync('ffmpeg', ['-y', '-i', mp4, '-vn', '-c:a', 'copy', path.join(media, clip.id + '.1.m4a')], { stdio: 'ignore' });
  const db = createClient({ url: 'file:' + dbPath });
  await db.execute({ sql: 'INSERT OR REPLACE INTO media_cache (video_id,status,gen,size,height,vcodec,acodec,duration,meta,last_access) VALUES (?,?,?,?,?,?,?,?,?,?)', args: [clip.id, 'ready', 1, statSync(mp4).size, 90, 'h264', 'aac', 3, JSON.stringify(clip), Date.now()] });
  db.close();
  for (const [name, type] of Object.entries({ chromium, webkit })) {
    if (target !== 'all' && target !== name) continue;
    const browser = await type.launch({ headless: true });
    results.browsers[name] = [];
    try {
      for (const scenario of scenarios.filter(s => !option('--scenarios', null) || option('--scenarios').split(',').includes(s))) {
        const context = await browser.newContext({ viewport: { width: 414, height: 896 }, serviceWorkers: 'allow' });
        const page = await context.newPage(), errors = [];
        page.on('pageerror', e => errors.push(e.message));
        const autoPreload = !['pinned-boot', 'playlist-boot-off', 'playlist-add-setting-off', 'settings-enable'].includes(scenario);
        const settings = { layout: 'f7-swipe', autoPreload, saveBeforePlay: ['open-save-first', 'open-audio-only', 'open-prefer-stream'].includes(scenario), audioOnly: scenario === 'open-audio-only' };
        const hasPlaylist = scenario.endsWith('boot') || ['playlist-boot-off', 'settings-enable', 'playlist-existing-add'].includes(scenario);
        const playlists = hasPlaylist ? [{ id: 'test', name: 'Autosave playlist', videos: scenario === 'playlist-existing-add' ? [] : [clip] }] : [];
        await context.addInitScript(({ settings, playlists, clip, scenario }) => localStorage.setItem('_ytpdata', JSON.stringify({ settings, playlists, history: [clip], pinnedPlaylists: scenario === 'pinned-boot' ? ['test'] : [] })), { settings, playlists, clip, scenario });
        // No public service/YouTube requests; the local clip uses real prepare/range endpoints.
        await context.route('**/*', r => r.request().url().startsWith(origin) ? r.continue() : r.abort());
        await context.route('**/api/streams/warm**', r => r.fulfill({ json: { ok: true } }));
        try {
          await page.goto(origin, { waitUntil: 'domcontentloaded' });
          await page.waitForFunction(() => typeof data !== 'undefined' && window.SettingsSections?.get('downloads-storage'));
          const supported = await page.evaluate(() => OPFS.isSupported());
          if (!supported && !results.unsupported.includes(name)) results.unsupported.push(name);
          // Count invocations in browsers without native OPFS; never treat this as stored bytes.
          await page.evaluate(() => { window.__saveCalls = 0; const original = API.cacheDownload; API.cacheDownload = (...a) => { window.__saveCalls++; return original(...a); }; });
          if (scenario.startsWith('open')) await page.evaluate(({ clip, scenario }) => { Player.loadVideo(clip, { preferStream: scenario === 'open-prefer-stream' }); }, { clip, scenario });
          if (scenario.startsWith('playlist-add')) {
            await page.evaluate(clip => newPlaylist(clip), clip);
            await page.locator('#modal input').fill('Autosave playlist');
            await page.getByRole('button', { name: 'Create', exact: true }).evaluate(b => b.click());
          }
          if (scenario === 'playlist-existing-add') {
            await page.evaluate(clip => openCardMenu(clip), clip);
            await page.getByRole('button', { name: '+ Autosave playlist', exact: true }).evaluate(b => b.click());
          }
          if (scenario.startsWith('settings-')) {
            await page.evaluate(() => { view = { type: 'settings' }; renderList(); });
            const id = scenario === 'settings-enable' ? 'setAutoPreload' : 'setSaveBeforePlay';
            await page.locator('#' + id).evaluate(e => { e.checked = true; e.dispatchEvent(new Event('change', { bubbles: true })); });
            const key = scenario === 'settings-enable' ? 'autoPreload' : 'saveBeforePlay';
            await page.waitForFunction(key => JSON.parse(localStorage.getItem('_ytpdata')).settings[key] === true, key);
            if (scenario === 'settings-save-first') await page.evaluate(clip => { Player.loadVideo(clip); }, clip);
          }
          const expected = !['open-default', 'open-audio-only', 'open-prefer-stream', 'playlist-boot-off'].includes(scenario);
          if (supported && expected) await page.waitForFunction(id => cachedIds.has(id), clip.id, { timeout: 15000 });
          else await page.waitForTimeout(1000);
          const state = await page.evaluate(async id => ({ cached: cachedIds.has(id), files: OPFS.isSupported() ? await OPFS.listVideos() : [], queue: SaveQueue.pending(), calls: window.__saveCalls }), clip.id);
          assert.equal(state.cached, expected && supported, JSON.stringify(state));
          assert.equal(state.files.some(f => f.id === clip.id && f.size > 0), expected && supported, JSON.stringify(state));
          if (!supported && expected && !['open-save-first', 'settings-save-first', 'playlist-boot', 'pinned-boot'].includes(scenario)) assert.ok(state.calls > 0, 'save action was not invoked');
          if (supported && expected) {
            assert.equal(state.files.find(f => f.id === clip.id).size, statSync(mp4).size, 'stored file is incomplete');
            await page.evaluate(() => { view = { type: 'saved' }; renderList(); });
            await page.waitForFunction(() => document.getElementById('cards').textContent.includes('Autosave local clip'));
            await page.evaluate(() => { view = { type: 'downloads' }; renderList(); });
            await page.waitForFunction(() => document.getElementById('listTitle').textContent === 'Downloads');
          }
          const result = { scenario, supported, saved: state.cached, bytes: state.files.find(f => f.id === clip.id)?.size || 0, calls: state.calls, errors };
          results.browsers[name].push(result);
          console.log(`${name} ${scenario}: PASS ${supported ? 'saved=' + state.cached : 'UI/save guard only; OPFS unavailable'}`);
        } catch (e) {
          results.failures.push({ browser: name, scenario, error: e.message, errors });
          console.log(`${name} ${scenario}: FAIL ${e.message.split('\n')[0]}`);
        } finally { await context.close(); }
      }
    } finally { await browser.close(); }
  }
 } finally {
  if (child.exitCode === null) { child.kill('SIGTERM'); await new Promise(r => child.once('exit', r)); }
  rmSync(scratch, { recursive: true, force: true });
  const out = option('--out', null);
  if (out) { mkdirSync(path.dirname(path.resolve(out)), { recursive: true }); writeFileSync(out, JSON.stringify(results, null, 2) + '\n'); }
 }
 if (results.failures.length) process.exitCode = 1;
 else if (results.unsupported.length && !args.includes('--allow-unsupported-webkit')) { console.error('Native OPFS not verified in: ' + results.unsupported.join(', ')); process.exitCode = 2; }
--- a/perf/baseline.mjs
+++ b/perf/baseline.mjs
@@ -26,6 +26,7 @@
 */
 import assert from 'node:assert/strict';
 import { assertColdAssets, assertChangedAssets, assertWarmAssets, waitForIdleAssets } from './measurement.mjs';
 import { createHash } from 'node:crypto';
 import { spawn, spawnSync, execFileSync } from 'node:child_process';
 import { existsSync, mkdirSync, rmSync, cpSync, appendFileSync, statSync, writeFileSync, readFileSync, symlinkSync, unlinkSync } from 'node:fs';
@@ -61,6 +62,8 @@ function parseArgs() {
    out: null,
    compare: null,
    frontendCommit: null,
    sourceRoot: null,
    assertCold: false,
  };
  for (let i = 0; i < args.length; i++) {
@@ -70,6 +73,8 @@ function parseArgs() {
    else if (a === '--profile' && i + 1 < args.length) options.profile = args[++i];
    else if (a === '--scenario' && i + 1 < args.length) options.scenario = args[++i];
    else if (a === '--out' && i + 1 < args.length) options.out = args[++i];
    else if (a === '--assert-cold') options.assertCold = true;
    else if (a === '--source-root' && i + 1 < args.length) options.sourceRoot = path.resolve(args[++i]);
    else if (a === '--frontend-commit' && i + 1 < args.length) options.frontendCommit = args[++i];
    else if (a === '--compare' && i + 1 < args.length) options.compare = args[++i];
  }
@@ -150,7 +155,8 @@ async function seedDatabase(dbPath, mediaFiles) {
 * Bun Server Manager
 */
 class ServerManager {
-  constructor(scratchDir, publicDir) {
+  constructor(scratchDir, publicDir, sourceRoot = REPO_ROOT) {
    this.sourceRoot = sourceRoot;
    this.scratchDir = scratchDir;
    this.publicDir = publicDir;
    this.dataDir = path.join(scratchDir, 'data');
@@ -183,7 +189,7 @@ class ServerManager {
      DB_PATH: this.dbPath,
    };
-    const serverScript = path.join(REPO_ROOT, 'server', 'server.js');
+    const serverScript = path.join(this.sourceRoot, 'server', 'server.js');
    this.serverProcess = spawn('bun', [serverScript], {
      cwd: srvCwd,
      env,
@@ -371,8 +377,8 @@ async function runColdScenario({ browserType, server, proxy, profile }) {
    const fcp = paint.find((p) => p.name === 'first-contentful-paint');
    return {
-      initialJsCss: performance.getEntriesByType('resource').filter(entry=>/\.(?:js|css)(?:[?#]|$)/.test(entry.name)&&entry.startTime <= nav.domContentLoadedEventEnd&&['script','link','css'].includes(entry.initiatorType)).reduce((sum,entry)=>sum+entry.encodedBodySize,0),
+      initialJsCss: performance.getEntriesByType('resource').filter(entry=>/\.(?:js|css)(?:[?#]|$)/.test(entry.name)&&entry.startTime <= nav.domContentLoadedEventEnd&&(['script','link','css'].includes(entry.initiatorType)||(entry.initiatorType==='fetch'&&new URL(entry.name).pathname==='/app.js'))).reduce((sum,entry)=>sum+entry.encodedBodySize,0),
-      initialAssetRequests: performance.getEntriesByType('resource').filter(entry=>/\.(?:js|css)(?:[?#]|$)/.test(entry.name)&&entry.startTime <= nav.domContentLoadedEventEnd&&['script','link','css'].includes(entry.initiatorType)).map(entry=>({url:entry.name,bytes:entry.encodedBodySize})),
+      initialAssetRequests: performance.getEntriesByType('resource').filter(entry=>/\.(?:js|css)(?:[?#]|$)/.test(entry.name)&&entry.startTime <= nav.domContentLoadedEventEnd&&(['script','link','css'].includes(entry.initiatorType)||(entry.initiatorType==='fetch'&&new URL(entry.name).pathname==='/app.js'))).map(entry=>({url:entry.name,bytes:entry.encodedBodySize,start:entry.startTime,responseStart:entry.responseStart,end:entry.responseEnd,initiator:entry.initiatorType})),
      fcp: fcp ? Math.round(fcp.startTime) : null,
      lcp: window.__lcp ? Math.round(window.__lcp) : null,
      domContentLoaded: nav ? Math.round(nav.domContentLoadedEventEnd - nav.startTime) : null,
@@ -461,6 +467,8 @@ async function runWarmScenario({ browserType, server, proxy, profile }) {
    });
  });
  await waitForIdleAssets(page);
  // Now measure warm re-navigation
  proxy.resetStats();
  proxy.startTracking();
@@ -470,6 +478,7 @@ async function runWarmScenario({ browserType, server, proxy, profile }) {
  proxy.stopTracking();
  const stats = proxy.getStats();
  assertWarmAssets(stats.requests);
  const pageMetrics = await page.evaluate(() => {
    const nav = performance.getEntriesByType('navigation')[0];
@@ -477,8 +486,8 @@ async function runWarmScenario({ browserType, server, proxy, profile }) {
    const fcp = paint.find((p) => p.name === 'first-contentful-paint');
    return {
-      initialJsCss: performance.getEntriesByType('resource').filter(entry=>/\.(?:js|css)(?:[?#]|$)/.test(entry.name)&&entry.startTime <= nav.domContentLoadedEventEnd&&['script','link','css'].includes(entry.initiatorType)).reduce((sum,entry)=>sum+entry.encodedBodySize,0),
+      initialJsCss: performance.getEntriesByType('resource').filter(entry=>/\.(?:js|css)(?:[?#]|$)/.test(entry.name)&&entry.startTime <= nav.domContentLoadedEventEnd&&(['script','link','css'].includes(entry.initiatorType)||(entry.initiatorType==='fetch'&&new URL(entry.name).pathname==='/app.js'))).reduce((sum,entry)=>sum+entry.encodedBodySize,0),
-      initialAssetRequests: performance.getEntriesByType('resource').filter(entry=>/\.(?:js|css)(?:[?#]|$)/.test(entry.name)&&entry.startTime <= nav.domContentLoadedEventEnd&&['script','link','css'].includes(entry.initiatorType)).map(entry=>({url:entry.name,bytes:entry.encodedBodySize})),
+      initialAssetRequests: performance.getEntriesByType('resource').filter(entry=>/\.(?:js|css)(?:[?#]|$)/.test(entry.name)&&entry.startTime <= nav.domContentLoadedEventEnd&&(['script','link','css'].includes(entry.initiatorType)||(entry.initiatorType==='fetch'&&new URL(entry.name).pathname==='/app.js'))).map(entry=>({url:entry.name,bytes:entry.encodedBodySize,start:entry.startTime,responseStart:entry.responseStart,end:entry.responseEnd,initiator:entry.initiatorType})),
      fcp: fcp ? Math.round(fcp.startTime) : null,
      lcp: window.__lcp ? Math.round(window.__lcp) : null,
      domContentLoaded: nav ? Math.round(nav.domContentLoadedEventEnd - nav.startTime) : null,
@@ -558,8 +567,8 @@ async function runOfflineScenario({ browserType, server, proxy, profile }) {
    const fcp = paint.find((p) => p.name === 'first-contentful-paint');
    return {
-      initialJsCss: performance.getEntriesByType('resource').filter(entry=>/\.(?:js|css)(?:[?#]|$)/.test(entry.name)&&entry.startTime <= nav.domContentLoadedEventEnd&&['script','link','css'].includes(entry.initiatorType)).reduce((sum,entry)=>sum+entry.encodedBodySize,0),
+      initialJsCss: performance.getEntriesByType('resource').filter(entry=>/\.(?:js|css)(?:[?#]|$)/.test(entry.name)&&entry.startTime <= nav.domContentLoadedEventEnd&&(['script','link','css'].includes(entry.initiatorType)||(entry.initiatorType==='fetch'&&new URL(entry.name).pathname==='/app.js'))).reduce((sum,entry)=>sum+entry.encodedBodySize,0),
-      initialAssetRequests: performance.getEntriesByType('resource').filter(entry=>/\.(?:js|css)(?:[?#]|$)/.test(entry.name)&&entry.startTime <= nav.domContentLoadedEventEnd&&['script','link','css'].includes(entry.initiatorType)).map(entry=>({url:entry.name,bytes:entry.encodedBodySize})),
+      initialAssetRequests: performance.getEntriesByType('resource').filter(entry=>/\.(?:js|css)(?:[?#]|$)/.test(entry.name)&&entry.startTime <= nav.domContentLoadedEventEnd&&(['script','link','css'].includes(entry.initiatorType)||(entry.initiatorType==='fetch'&&new URL(entry.name).pathname==='/app.js'))).map(entry=>({url:entry.name,bytes:entry.encodedBodySize,start:entry.startTime,responseStart:entry.responseStart,end:entry.responseEnd,initiator:entry.initiatorType})),
      fcp: fcp ? Math.round(fcp.startTime) : null,
      lcp: window.__lcp ? Math.round(window.__lcp) : null,
      domContentLoaded: nav ? Math.round(nav.domContentLoadedEventEnd - nav.startTime) : null,
@@ -622,24 +631,7 @@ async function runUpdateScenario({ browserType, server, proxy, profile, updateKi
  // Phase 3 activation precedes idle feature caching. Measure updates from a
  // genuinely warm build, rather than counting unfinished first-install bytes.
-  if (await page.evaluate(()=>!!window.Lazy && !!window.Lazy.warm)) {
+  await waitForIdleAssets(page);
    await page.evaluate(()=>Lazy.warm());
    const end=Date.now()+90000;
    while (true) {
      const ready=await page.evaluate(async()=>{
        const c=await caches.open('ytplayer-assets'),r=await c.match('/__ytp_asset_state');
        if(!r)return false;
        const m=(await r.json()).current;
        return (await Promise.all(Object.values(m.groups).flatMap(g=>g.files).map(async p=>{
          const response=await c.match(p+'?v='+m.files[p].h);
          return response?.headers.get('X-Asset-Hash')===m.files[p].h;
        }))).every(Boolean);
      });
      if(ready)break;
      if(Date.now()>end)throw Error('Idle warm did not complete before update benchmark');
      await sleep(100);
    }
  }
  // Switch server to Tree N+1 (app.js or theme-glass.css modification)
  const targetTree = updateKind === 'feature' ? trees.treeUpdateFeature : updateKind === 'js' ? trees.treeUpdateJs : trees.treeUpdateCss;
@@ -662,20 +654,23 @@ async function runUpdateScenario({ browserType, server, proxy, profile, updateKi
    await sleep(50);
  }
-  if (updateKind === 'feature') {
+  const readyDuration = Date.now() - t0;
  const readyWireBytes = proxy.getStats().totalWireBytes;
  if (updateKind === 'feature' || updateKind === 'css') {
    const changedPath=updateKind==='feature'?'/presenter.js':'/theme-glass.css';
    // Readiness excludes background chunks. Include activation and the changed
    // feature's actual idle transfer rather than reporting readiness as its cost.
-    const expected = createHash('sha256').update(readFileSync(path.join(targetTree,'presenter.js'))).digest('hex').slice(0,10);
+    const expected = createHash('sha256').update(readFileSync(path.join(targetTree,changedPath.slice(1)))).digest('hex').slice(0,10);
    await page.evaluate(async()=>{const r=await navigator.serviceWorker.getRegistration();r.waiting.postMessage({type:'SKIP_WAITING'});});
    const end=Date.now()+90000;
    while(true) {
-      const complete=await page.evaluate(async h=>{
+      const complete=await page.evaluate(async ({h,p})=>{
        const r=await navigator.serviceWorker.getRegistration();
        if(r.waiting || r.installing)return false;
        r.active?.postMessage({type:'WARM_ASSETS',saveData:false});
-        const c=await caches.open('ytplayer-assets'),entry=await c.match('/presenter.js?v='+h);
+        const c=await caches.open('ytplayer-assets'),entry=await c.match(p+'?v='+h);
        return entry?.headers.get('X-Asset-Hash')===h;
-      },expected);
+      },{h:expected,p:changedPath});
      if(complete)break;
      if(Date.now()>end)throw Error('Changed feature was not cached after activation');
      await sleep(100);
@@ -684,14 +679,13 @@ async function runUpdateScenario({ browserType, server, proxy, profile, updateKi
  const duration = Date.now() - t0;
  proxy.stopTracking();
  const stats = proxy.getStats();
-  if(updateKind==='feature') {
+  assertChangedAssets(stats.requests, updateKind==='feature'?'/presenter.js':updateKind==='css'?'/theme-glass.css':'/app.js');
    const assetDownloads=stats.requests.filter(r=>r.bytes>0).map(r=>new URL(r.url,navUrl).pathname).filter(p=>/\.(?:js|css|woff2?|png|svg)$/.test(p)&&!['/sw.js','/asset-sync-core.js'].includes(p));
    assert.deepEqual([...new Set(assetDownloads)],['/presenter.js'],'feature edit transfers only its chunk; no app/core/font/icon payload');
  }
  await browser.close();
  return {
    updateKind,
    readyDuration,
    readyWireBytes,
    requests: stats.requests,
    duration,
    requestCount: stats.requestCount,
@@ -715,6 +709,8 @@ async function main() {
  if (options.browser === 'all' || options.browser === 'chromium') browsers.push(pw.chromium);
  if (options.browser === 'all' || options.browser === 'webkit') browsers.push(pw.webkit);
  const requestedScenarios=new Set(options.scenario.split(','));
  const wants=name=>requestedScenarios.has('all')||requestedScenarios.has(name);
  const profiles = [];
  if (options.profile === 'all' || options.profile === 'lte') profiles.push('lte');
  if (options.profile === 'all' || options.profile === 'lossy') profiles.push('lossy');
@@ -728,7 +724,7 @@ async function main() {
  const treeUpdateCss = path.join(tmpRoot, 'tree-update-css');
  const treeUpdateFeature = path.join(tmpRoot, 'tree-update-feature');
-  let frontendSource=path.join(REPO_ROOT,'frontend');
+  let frontendSource=path.join(options.sourceRoot || REPO_ROOT,'frontend');
  if(options.frontendCommit) {
    const archive=path.join(tmpRoot,'frontend.tar');
    writeFileSync(archive,execFileSync('git',['archive',options.frontendCommit,'frontend'],{cwd:REPO_ROOT,maxBuffer:20*1024*1024}));
@@ -746,13 +742,15 @@ async function main() {
  const trees = { treeBase, treeUpdateJs, treeUpdateCss, treeUpdateFeature };
  const serverScratch = path.join(tmpRoot, 'server-run');
-  const server = new ServerManager(serverScratch, treeBase);
+  const server = new ServerManager(serverScratch, treeBase, options.sourceRoot || REPO_ROOT);
  await server.start();
  console.log(`Bun server running on ephemeral port ${server.port}`);
  const results = {
    date: new Date().toISOString(),
    frontendCommit: options.frontendCommit,
    sourceRoot: options.sourceRoot,
    sourceCommit: spawnSync('git', ['rev-parse','HEAD'], { cwd: options.sourceRoot || REPO_ROOT }).stdout.toString().trim(),
    frontendBuildTag: (await (await fetch('http://127.0.0.1:'+server.port+'/api/version')).json()).buildTag,
    commit: spawnSync('git', ['rev-parse', 'HEAD'], { cwd: REPO_ROOT }).stdout.toString().trim(),
    runsConfigured: options.runs,
@@ -765,6 +763,9 @@ async function main() {
      results.browsers[bName] = {};
      for (const prof of profiles) {
        // The preceding profile can end on a synthetic feature-update tree.
        // Always measure the actual base build on the next cold visit.
        await server.restartWithPublic(treeBase);
        console.log(`\n>>> Running Benchmark: Browser=[${bName}] Profile=[${prof}]`);
        results.browsers[bName][prof] = {};
@@ -774,14 +775,15 @@ async function main() {
        console.log(`Proxy listening on port ${proxy.port} (mode: ${proxyProfile})`);
        // 1. Cold Scenario
-        if (options.scenario === 'all' || options.scenario === 'cold') {
+        if (wants('cold')) {
          console.log(`  [Scenario: Cold Load] running ${options.runs} iterations...`);
          const coldRuns = [];
          for (let r = 0; r < options.runs; r++) {
            process.stdout.write(`    run ${r + 1}/${options.runs}... `);
            const res = await runColdScenario({ browserType: bType, server, proxy, profile: prof });
            if(options.assertCold)assertColdAssets(res.requests);
            coldRuns.push(res);
-            console.log(`done (${res.wireBytes} bytes, ${res.requestCount} reqs, boot=${res.bootDone}ms)`);
+            console.log(`done (${res.wireBytes} bytes, ${res.requestCount} reqs, fcp=${res.fcp}ms, boot=${res.bootDone}ms)`);
          }
          results.browsers[bName][prof].cold = {
@@ -802,11 +804,12 @@ async function main() {
            requests: coldRuns[0]?.requests || [],
            initialJsCss: summarizeList(coldRuns.map(r=>r.initialJsCss)),
            initialAssetRequests: coldRuns[0]?.initialAssetRequests || [],
            waterfalls: coldRuns.map(r=>({fcp:r.fcp,requests:r.requests,page:r.initialAssetRequests})),
          };
        }
        // 2. Warm Scenario
-        if (options.scenario === 'all' || options.scenario === 'warm') {
+        if (wants('warm')) {
          console.log(`  [Scenario: Warm Load] running ${options.runs} iterations...`);
          const warmRuns = [];
          for (let r = 0; r < options.runs; r++) {
@@ -828,7 +831,7 @@ async function main() {
        }
        // 3. Offline Scenario
-        if (options.scenario === 'all' || options.scenario === 'offline') {
+        if (wants('offline')) {
          console.log(`  [Scenario: Offline Reload] running ${options.runs} iterations...`);
          const offRuns = [];
          for (let r = 0; r < options.runs; r++) {
@@ -850,7 +853,7 @@ async function main() {
        }
        // 4. Update N -> N+1 (JS)
-        if (options.scenario === 'all' || options.scenario === 'update-js') {
+        if (wants('update-js')) {
          console.log(`  [Scenario: Update N->N+1 (1-line app.js)] running ${options.runs} iterations...`);
          const updJsRuns = [];
          for (let r = 0; r < options.runs; r++) {
@@ -877,7 +880,7 @@ async function main() {
        }
        // 5. Update N -> N+1 (CSS)
-        if (options.scenario === 'all' || options.scenario === 'update-css') {
+        if (wants('update-css')) {
          console.log(`  [Scenario: Update N->N+1 (1-line theme-glass.css)] running ${options.runs} iterations...`);
          const updCssRuns = [];
          for (let r = 0; r < options.runs; r++) {
@@ -895,6 +898,8 @@ async function main() {
          }
          results.browsers[bName][prof].updateCss = {
            readyDuration: summarizeList(updCssRuns.map(r=>r.readyDuration)),
            readyWireBytes: summarizeList(updCssRuns.map(r=>r.readyWireBytes)),
            requestCount: summarizeList(updCssRuns.map((r) => r.requestCount)),
            wireBytes: summarizeList(updCssRuns.map((r) => r.wireBytes)),
            duration: summarizeList(updCssRuns.map((r) => r.duration)),
@@ -903,7 +908,7 @@ async function main() {
          };
        }
-        if ((options.scenario === 'all' || options.scenario === 'update-feature') && existsSync(path.join(treeBase,'presenter.js'))) {
+        if ((wants('update-feature')) && existsSync(path.join(treeBase,'presenter.js'))) {
          console.log(`  [Scenario: Update split-out presenter, including idle cache fill] running ${options.runs} iterations...`);
          const runs=[];
          for(let r=0;r<options.runs;r++) {
--- a/perf/dsp.mjs
+++ b/perf/dsp.mjs
@@ -0,0 +1,165 @@
 #!/usr/bin/env node
 // End-to-end JamesDSP checks against the real local server, manifest cache and media fixture.
 import assert from 'node:assert/strict';
 import { spawn, execFileSync } from 'node:child_process';
 import { createRequire } from 'node:module';
 import { createServer } from 'node:net';
 import { mkdtempSync, mkdirSync, cpSync, writeFileSync, statSync, rmSync, existsSync } from 'node:fs';
 import { join, resolve } from 'node:path';
 import { chromium, webkit } from 'playwright';
 import { createThrottleProxy } from './proxy.mjs';
 const repo = resolve(import.meta.dirname, '..');
 const requested = process.argv.includes('--browser') ? process.argv[process.argv.indexOf('--browser') + 1] : 'all';
 assert.ok(['all', 'chromium', 'webkit'].includes(requested));
 const scratch = mkdtempSync(join(repo, 'perf/.tmp/dsp-'));
 const results = { results: [], failures: [] };
 const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
 async function poll(fn, timeout = 90000) { const end = Date.now() + timeout; while (Date.now() < end) { if (await fn()) return true; await sleep(100); } return false; }
 async function run(engine) {
  const cwd = join(scratch, engine); mkdirSync(cwd); cpSync(join(repo, 'frontend'), join(cwd, 'public'), { recursive: true }); mkdirSync(join(cwd, 'media'));
  const portProbe = createServer(); await new Promise(resolve => portProbe.listen(0, '127.0.0.1', resolve)); const port = portProbe.address().port; await new Promise(resolve => portProbe.close(resolve));
  let child, browser, proxy, context, log = '';
  let origin = `http://127.0.0.1:${port}`;
  const result = { engine, errors: [], failures: [], rms: [], checks: [] }; results.results.push(result);
  async function stop() { if (!child) return; const proc = child; child = null; if (proc.exitCode === null) { proc.kill('SIGTERM'); await new Promise(resolve => proc.once('exit', resolve)); } }
  try {
    const clips = [
      { id: 'dspfixture01', title: 'DSP test tone 110 Hz', channel: 'Local test', duration: 5, thumbnail: 'data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=' },
      { id: 'dspfixture02', title: 'DSP test tone 660 Hz', channel: 'Local test', duration: 5, thumbnail: 'data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=' },
    ];
    child = spawn('bun', [join(repo, 'server/server.js')], { cwd, env: { ...process.env, PORT: String(port), DB_PATH: join(cwd, 'db.sqlite'), MEDIA_DIR: join(cwd, 'media'), UPLOAD_DIR: join(cwd, 'uploads'), DATA_DIR: join(cwd, 'data'), ASSET_HASHING: '1', ASSET_SYNC: '1', BUILD_TAG: '' }, stdio: ['ignore', 'pipe', 'pipe'] });
    for (const stream of [child.stdout, child.stderr]) stream.on('data', chunk => { log = (log + chunk).slice(-8000); });
    if (!await poll(async () => { if (child.exitCode !== null) throw Error(log); try { return (await fetch(origin + '/api/version')).ok; } catch { return false; } })) throw Error('Server did not start: ' + log);
    for (const [index, clip] of clips.entries()) {
      const mp4 = join(cwd, 'media', clip.id + '.1.mp4');
      execFileSync('ffmpeg', ['-y', '-f', 'lavfi', '-i', 'color=c=blue:s=160x90:r=10:d=5', '-f', 'lavfi', '-i', `sine=frequency=${index ? 660 : 110}:duration=5`, '-c:v', 'libx264', '-pix_fmt', 'yuv420p', '-c:a', 'aac', '-movflags', '+faststart', '-shortest', mp4], { stdio: 'ignore' });
      execFileSync('ffmpeg', ['-y', '-i', mp4, '-vn', '-c:a', 'copy', join(cwd, 'media', clip.id + '.1.m4a')], { stdio: 'ignore' });
      assert.ok(existsSync(mp4), `generated local clip ${mp4}`);
    }
    const require = createRequire(import.meta.url); const { createClient } = require(join(repo, 'server/node_modules/@libsql/client'));
    const db = createClient({ url: 'file:' + join(cwd, 'db.sqlite') });
    for (const clip of clips) { const file = join(cwd, 'media', clip.id + '.1.mp4'); await db.execute({ sql: 'INSERT OR REPLACE INTO media_cache (video_id,status,gen,size,height,vcodec,acodec,duration,meta,last_access) VALUES (?,?,?,?,?,?,?,?,?,?)', args: [clip.id, 'ready', 1, statSync(file).size, 90, 'h264', 'aac', 5, JSON.stringify(clip), Date.now()] }); }
    db.close();
    proxy = createThrottleProxy({ targetPort: port, profile: 'unthrottled' }); origin = `http://127.0.0.1:${await proxy.listen()}`;
    const type = engine === 'chromium' ? chromium : webkit; browser = await type.launch({ headless: true, ...(engine === 'chromium' ? { args: ['--autoplay-policy=no-user-gesture-required'] } : {}) });
    context = await browser.newContext({ viewport: { width: 414, height: 896 } });
    await context.addInitScript(() => { window.__dspToasts = []; new MutationObserver(() => { const text = document.querySelector('#toastContainer')?.textContent?.trim(); if (text && window.__dspToasts.at(-1) !== text) window.__dspToasts.push(text); }).observe(document, { childList: true, subtree: true, characterData: true }); });
    await context.route('**/*', route => route.request().url().startsWith(origin) ? route.continue() : route.fulfill({ status: 200, contentType: 'image/gif', body: Buffer.from('R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=', 'base64') }));
    const page = await context.newPage(); let offlinePhase = false, failedApiTransports = 0; page.on('pageerror', error => { if (offlinePhase && failedApiTransports && /TypeError: Load failed|\/api\//.test(error.message)) (result.expectedApiErrors ||= []).push(error.message); else result.errors.push(error.message); });
    page.on('requestfailed', request => { const path = new URL(request.url()).pathname; if (path.startsWith('/api/')) failedApiTransports++; else if (!(offlinePhase && path === '/sw.js')) result.errors.push(`request failed ${request.url()}: ${request.failure()?.errorText}`); });
    page.on('response', response => {
      const url = new URL(response.url()), path = url.pathname;
      // The local fixture IDs have no upstream YouTube artwork. These requests
      // are unrelated to the local media or DSP asset path under test.
      if (url.hostname === 'i.ytimg.com' && /\/vi\/dspfixture0[12]\//.test(path)) {
        (result.fixtureResponses ||= []).push({ url: response.url(), status: response.status() });
      } else if (!path.startsWith('/api/') && response.status() >= 400) result.errors.push(`asset response ${response.status()} ${response.url()}`);
    });
    page.on('response', response => { if (/jamesdsp\/(?:worklet\.mjs|dsp\/jamesdsp[^/?]*\.mjs)/.test(response.url())) result.requests ||= [], result.requests.push({ url: response.url(), status: response.status(), type: response.headers()['content-type'] }); });
    page.on('requestfailed', request => { if (/jamesdsp\//.test(request.url())) result.requestsFailed ||= [], result.requestsFailed.push({ url: request.url(), error: request.failure()?.errorText }); });
    const boot = async () => { await page.goto(origin); await page.waitForFunction(() => typeof data !== 'undefined' && document.querySelector('#sidebarToggle')); };
    await boot();
    const manifest = await (await fetch(origin + '/api/manifest')).json();
    const checkComplete = () => page.evaluate(async ({ files, groups }) => { const cache = await caches.open('ytplayer-assets'), opted = !!(data.settings.jamesDsp?.enabled || data.settings.jamesDsp?.downloadForOffline); const optional = new Set(Object.values(groups).filter(group => group.offlineOptIn && !(opted && group.offlineOptIn === 'jamesDsp')).flatMap(group => group.files)); const missing = []; for (const [path, file] of Object.entries(files)) { if (optional.has(path)) continue; const r = await cache.match(path + '?v=' + file.h); if (!r || r.headers.get('X-Asset-Hash') !== file.h) missing.push(path); } return missing; }, manifest);
    assert.equal((await page.evaluate(async () => { const shell = await caches.open('ytplayer-shell'); return (await shell.keys()).some(r => r.url.includes('jamesdsp')); })), false, 'DSP is never in the shell cache');
    assert.equal(await poll(async () => !(await checkComplete()).length, 120000), true, 'offline completion job fills manifest before offline test');
    const optionalCount = Object.values(manifest.groups || {}).filter(group => group.offlineOptIn).reduce((n, group) => n + group.files.filter(path => manifest.files[path]).length, 0);
    result.checks.push({ name: 'required files cached; optional DSP deferred', files: Object.keys(manifest.files).length - optionalCount, optionalDeferred: optionalCount, manifestFiles: Object.keys(manifest.files).length });
    await page.evaluate(async () => { await Lazy.load('feature:eq-core'); await Lazy.load('feature:vocal-reducer'); data.settings.jamesDsp = { enabled: false, downloadForOffline: false, preset: 'flat', params: {}, irRef: null }; EQ.setLevel(1); EQ.setLevel(0); EQ.apply(); });
    await page.evaluate(clip => Player.loadVideo(clip), clips[0]);
    await page.locator('#playBtn').click({ force: true }).catch(() => {});
    if (!await poll(() => page.evaluate(() => Player.master?.currentTime > 0.4), 12000)) { await page.evaluate(() => Player.master?.play().catch(() => {})); assert.equal(await poll(() => page.evaluate(() => Player.master?.currentTime > 0.4), 12000), true, 'local test clip starts'); }
    await page.evaluate(() => { if (Player.master) Player.master.loop = true; });
    const rms = async () => page.evaluate(async () => {
      const analyser = EQ.analyser(); if (!analyser) throw new Error('EQ analyser unavailable');
      const values = new Float32Array(analyser.fftSize); let sum = 0, count = 0, end = performance.now() + 600;
      while (performance.now() < end) { analyser.getFloatTimeDomainData(values); for (const v of values) { sum += v * v; count++; } await new Promise(resolve => setTimeout(resolve, 18)); }
      return Math.sqrt(sum / Math.max(1, count));
    });
    await page.evaluate(() => { EQ.apply(); }); await sleep(250);
    const standardRms = await rms(); assert.ok(standardRms > 0, `Standard output has nonzero RMS (${standardRms})`);
    await page.locator('#bottomNav [data-view="settings"]').click(); await page.evaluate(() => document.querySelector('[data-section="playback"]').click());
    await page.selectOption('#setSoundEngine', 'jamesdsp');
    const active = await poll(() => page.evaluate(() => !!EQ.state().jamesDsp?.active), 12000);
    if (!active) result.diagnostics = await page.evaluate(() => ({ enabled: data.settings.jamesDsp?.enabled, state: EQ.state(), lazyLoaded: Lazy.loaded('feature:jamesdsp'), toast: document.querySelector('#toastContainer')?.textContent || '', toastHistory: window.__dspToasts }));
    assert.equal(active, true, `JamesDSP worklet activates ${JSON.stringify(result.diagnostics || {})}`);
    assert.equal(await poll(async () => !(await checkComplete()).length, 120000), true, 'engine opt-in completes optional WASM and module cache');
    await sleep(200); const flat = await rms(); result.rms.push({ effect: 'flat', rms: flat });
    for (const preset of ['bass', 'vocal', 'loudness', 'headphone', 'bright', 'warm']) {
      await page.selectOption('#setDspPreset', preset); await sleep(900);
      const value = await rms(); assert.ok(Number.isFinite(value), `${preset} RMS is finite`); result.rms.push({ effect: preset, rms: value });
    }
    const preConvolverRms = await rms();
    result.irLoad = await page.evaluate(async () => { const reference = await EQ.loadDspBuiltinIR('Small room'); await new Promise(resolve => setTimeout(resolve, 300)); return { reference, settings: data.settings.jamesDsp, state: EQ.state().jamesDsp, toast: document.querySelector('#toastContainer')?.textContent || '' }; });
    const convolverRms = await rms();
    assert.equal(result.irLoad.state.irRef?.name, 'Small room', 'generated IR is loaded into the active worklet');
    result.checks.push({ name: 'live generated IR loaded', beforeRms: preConvolverRms, afterRms: convolverRms, ir: result.irLoad.state.irRef });
    await page.evaluate(clip => { Player.pause(); Player.loadVideo(clip); }, clips[1]); await sleep(500); await page.evaluate(() => Player.master?.play().catch(() => {}));
    const trackSwapActive = await poll(() => page.evaluate(() => Player.master?.currentSrc.includes('dspfixture02') && Player.master?.readyState >= 2 && EQ.state().jamesDsp?.active), 12000);
    if (!trackSwapActive) result.trackSwapDiagnostics = await page.evaluate(() => ({ time: Player.master?.currentTime, paused: Player.master?.paused, readyState: Player.master?.readyState, state: EQ.state().jamesDsp, graph: AudioGraph.snapshot(), source: Player.master?.currentSrc }));
    assert.equal(trackSwapActive, true, 'DSP remains active on the replacement media source');
    result.checks.push({ name: 'track switch retains DSP route', graph: await page.evaluate(() => AudioGraph.snapshot()) });
    await page.evaluate(() => { data.settings.jamesDsp.params['bass.enabled'] = 1; data.settings.jamesDsp.params['eq.enabled'] = 1; EQ.apply(); }); await sleep(800);
    const activeRms = await rms();
    await page.evaluate(async () => { await EQ.toggleDspBypass(); }); await sleep(200); const bypassRms = await rms();
    const bypassState = await page.evaluate(() => EQ.state().jamesDsp);
    assert.equal(bypassState.route, 'standard', 'A/B bypass routes directly to the unchanged Standard graph');
    result.checks.push({ name: 'A/B exact Standard route', standardRms, activeRms, bypassRms, ...bypassState });
    await page.evaluate(async () => { const state = EQ.state().jamesDsp, graph = AudioGraph.snapshot(); return { state, graph }; }).then(({ state, graph }) => {
      assert.equal(state.liveHeaps, 1); assert.equal(state.maxLiveHeaps, 1); assert.ok(graph.sourceCount <= 2, 'only existing player media sources'); result.checks.push({ name: 'one worklet heap / single graph', ...state, graph });
    });
    const dspRender = await page.evaluate(async () => {
      const { JamesDSPNode } = await import(Lazy.url('/vendor/jamesdsp/jamesdsp-node.mjs'));
      async function render(effect, rate = 32000) {
        const frames = 32768, context = new OfflineAudioContext(2, frames, rate);
        const engine = await JamesDSPNode.create(context, { wasmURL: Lazy.url('/vendor/jamesdsp/dsp/jamesdsp.wasm'), workletURL: Lazy.url('/vendor/jamesdsp/worklet.mjs') });
        const buffer = context.createBuffer(2, 2048, rate);
        for (let i = 0; i < buffer.length; i++) { const sample = Math.sin(2 * Math.PI * 440 * i / rate) * 0.25; buffer.getChannelData(0)[i] = sample; buffer.getChannelData(1)[i] = sample; }
        if (effect === 'convolver') {
          const ir = context.createBuffer(4, 4096, rate); ir.getChannelData(0)[0] = 0.5; ir.getChannelData(1)[97] = 0.25; ir.getChannelData(2)[211] = -0.2; ir.getChannelData(3)[0] = 0.5;
          await engine.loadIR(ir); await engine.setParam('convolver.mix', 1); await engine.setParam('convolver.enabled', 1);
        } else if (effect === 'spatial') {
          await engine.setParam('spatial.enabled', 1); await engine.setParam('spatial.mode', 6); await engine.setParam('spatial.spread', 100); await engine.setParam('spatial.azimuth', 45);
        }
        await engine.setBypass(false);
        const source = context.createBufferSource(); source.buffer = buffer; source.connect(engine.node); engine.node.connect(context.destination); source.start();
        const rendered = await context.startRendering();
        const left = rendered.getChannelData(0), right = rendered.getChannelData(1);
        let l = 0, r = 0, diff = 0; for (let i = 0; i < frames; i++) { l += left[i] ** 2; r += right[i] ** 2; diff += (left[i] - right[i]) ** 2; }
        const metrics = { leftRms: Math.sqrt(l / frames), rightRms: Math.sqrt(r / frames), interauralRms: Math.sqrt(diff / frames), rate: rendered.sampleRate };
        engine.destroy(); return metrics;
      }
      const dry = await render('dry'), convolver = await render('convolver'), spatial = await render('spatial');
      return { dry, convolver, spatial };
    });
    assert.equal(dspRender.dry.rate, 32000, 'ASRC accepts an arbitrary AudioContext rate');
    assert.ok(dspRender.convolver.interauralRms > dspRender.dry.interauralRms + 0.00001, `four-channel IR changes rendered stereo output (${JSON.stringify(dspRender)})`);
    assert.ok(dspRender.spatial.interauralRms > dspRender.dry.interauralRms + 0.00001, `3D stage changes interaural difference (${JSON.stringify(dspRender)})`);
    result.checks.push({ name: 'offline four-channel convolver, spatial difference and 32 kHz ASRC', ...dspRender });
    await page.evaluate(() => persist()); await sleep(500);
    offlinePhase = true; if (engine === 'chromium') await context.setOffline(true); else await proxy.setOffline(true);
    await page.reload(); await page.waitForFunction(() => typeof data !== 'undefined' && document.querySelector('#sidebarToggle'));
    assert.equal(await poll(() => page.evaluate(() => !!EQ.state().jamesDsp?.active), 30000), true, 'offline reload restores enabled DSP from cached modules');
    assert.equal(await page.evaluate(() => EQ.state().jamesDsp?.irRef?.name), 'Small room', 'stored generated IR is restored offline');
    result.checks.push({ name: 'offline reload with engine and stored IR enabled', missing: await checkComplete(), ir: await page.evaluate(() => EQ.state().jamesDsp?.irRef) });
    // A separate fresh profile corrupts the optional wasm response and verifies that Standard stays audible.
    offlinePhase = false; failedApiTransports = 0; if (engine === 'chromium') await context.setOffline(false); else await proxy.setOffline(false);
    const brokenContext = await browser.newContext({ viewport: { width: 414, height: 896 } });
    await brokenContext.route('**/*', route => route.request().url().startsWith(origin) ? route.continue() : route.fulfill({ status: 200, contentType: 'image/gif', body: Buffer.from('R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=', 'base64') }));
    await brokenContext.addInitScript(() => { const realFetch = window.fetch.bind(window); window.fetch = (input, init) => String(input).includes('/vendor/jamesdsp/dsp/jamesdsp.wasm') ? Promise.resolve(new Response('corrupt', { status: 503 })) : realFetch(input, init); });
    const brokenPage = await brokenContext.newPage(); brokenPage.on('pageerror', e => result.errors.push('corrupt test: ' + e.message)); await brokenPage.goto(origin); await brokenPage.waitForFunction(() => typeof data !== 'undefined');
    await brokenPage.locator('#bottomNav [data-view="settings"]').click(); await brokenPage.evaluate(() => document.querySelector('[data-section="playback"]').click()); await brokenPage.selectOption('#setSoundEngine', 'jamesdsp');
    assert.equal(await poll(() => brokenPage.evaluate(() => data.settings.jamesDsp.enabled === false && EQ.state().wired), 30000), true, 'corrupt wasm falls back to Standard');
    result.checks.push({ name: 'corrupt wasm returns to Standard', enabled: await brokenPage.evaluate(() => data.settings.jamesDsp.enabled), graph: await brokenPage.evaluate(() => AudioGraph.snapshot()) });
    await brokenContext.close();
  } catch (error) { result.failures.push(error.stack || error.message); }
  finally { await context?.close(); await browser?.close(); await proxy?.close(); await stop(); }
 }
 try { for (const engine of requested === 'all' ? ['chromium', 'webkit'] : [requested]) await run(engine); }
 finally { writeFileSync(join(repo, 'perf/.tmp/dsp-results.json'), JSON.stringify(results, null, 2) + '\n'); rmSync(scratch, { recursive: true, force: true }); }
 if (results.failures.length || results.results.some(result => result.failures.length || result.errors.length)) process.exitCode = 1;
--- a/perf/lazy.mjs
+++ b/perf/lazy.mjs
@@ -42,7 +42,8 @@ async function run(name){
  console.log(name,'initial boot');await page.goto(origin);await page.waitForFunction(()=>typeof data!=='undefined'&&document.querySelector('#carModeBtn'));
  await wait(page,async()=>!!(await navigator.serviceWorker.getRegistration())?.active);
  await page.evaluate(()=>Lazy.warm());
-  await wait(page,async()=>{const c=await caches.open('ytplayer-assets'),r=await c.match('/__ytp_asset_state');if(!r)return false;const s=await r.json();return !(await Promise.all(Object.values(s.current.groups).flatMap(g=>g.files).map(async p=>!!await c.match(p+'?v='+s.current.files[p].h)))).includes(false);});
+  await wait(page,async()=>{const c=await caches.open('ytplayer-assets'),r=await c.match('/__ytp_asset_state');if(!r)return false;const s=await r.json(),files=Object.entries(s.current.groups).filter(([,g])=>!g.offlineOptIn).flatMap(([,g])=>g.files);return !(await Promise.all(files.map(async p=>!!await c.match(p+'?v='+s.current.files[p].h)))).includes(false);});
  assert.equal(await page.evaluate(async()=>{const m=Lazy.manifest,path='/vendor/jamesdsp/dsp/jamesdsp.wasm',cache=await caches.open('ytplayer-assets');return !await cache.match(path+'?v='+m.files[path].h);}),true,'optional DSP WASM stays uncached on a default install');
  console.log(name,'warm complete');assert.equal(await page.evaluate(()=>Lazy.loaded('feature:car-mode')),false);
  assert.equal(await page.evaluate(()=>[...document.querySelectorAll('.stg-overlay,.deck-chips,.vol-pct,.mode-name,.stg-bot,.ch-badge,.upnext-clear,.list-sub,.p2p-strip,.sleep-status .sl-ic,.sleep-status .sl-sub,.mc-tune')].every(n=>getComputedStyle(n).display==='none')),true,'classic retains shared visibility defaults without loading Glass CSS');
  await checkCssOrder(page);
@@ -84,6 +85,23 @@ async function run(name){
  await page.evaluate(async()=>{await Lazy.load('feature:export');await Lazy.load('feature:video-edit');});
  assert.equal(proxy.getStats().requestCount,before,'all warmed extension assets stay offline');
  await start();disconnected=false;await proxy.setOffline(false);await page.evaluate(()=>localStorage.removeItem('perf-offline')); 
  // Change only app bytes, then prove loss of its current cache entry can boot
  // the compatible N-1 core offline without weakening the inline CSP policy.
  await stop();writeFileSync(join(cwd,'public/app.js'),readFileSync(join(cwd,'public/app.js'),'utf8')+'\n// phase6 app eviction probe\n');await start();
  const appTarget=await(await fetch(origin+'/api/manifest')).json();
  await page.evaluate(async()=>{const r=await navigator.serviceWorker.getRegistration();await r.update();});
  await wait(page,async tag=>{const r=await navigator.serviceWorker.getRegistration();return r?.waiting&&(await SwUpdate.askCacheStatus(r.waiting))?.version===tag;},appTarget.buildTag);
  await page.evaluate(async()=>{const r=await navigator.serviceWorker.getRegistration();r.waiting.postMessage({type:'SKIP_WAITING'});});
  await wait(page,async tag=>{const c=await caches.open('ytplayer-assets');return(await(await c.match('/__ytp_asset_state')).json()).current.buildTag===tag;},appTarget.buildTag);
  const appKey='/app.js?v='+appTarget.files['/app.js'].h;
  await page.evaluate(async key=>{await(await caches.open('ytplayer-assets')).delete(key);},appKey);
  await stop();disconnected=true;await proxy.setOffline(true);
  const probe=await context.newPage();probe.on('pageerror',e=>errors.push({message:e.message,disconnected}));
  const offlineBefore=proxy.getStats().requestCount;await probe.goto(origin);await probe.waitForFunction(()=>typeof data!=='undefined'&&typeof Player!=='undefined'&&document.querySelector('#carModeBtn'));
  assert.equal(await probe.evaluate(async key=>!!await(await caches.open('ytplayer-assets')).match(key),appKey),false,'N-1 never poisons the current app key');
  assert.equal(proxy.getStats().requestCount,offlineBefore,'N-1 app boot is entirely offline');
  await probe.close();await start();disconnected=false;await proxy.setOffline(false);
  await page.evaluate(async key=>{const r=await fetch(key+'&__ytpfresh=1');if(r.headers.get('X-Asset-Hash')!==key.split('v=')[1])throw Error('Wrong repair body');await(await caches.open('ytplayer-assets')).put(key,r);},appKey);
  // Keep an old tab whose core and group contracts remain those of build N.
  const old=await context.newPage();old.on('pageerror',e=>errors.push({message:e.message,disconnected}));await old.goto(origin);await old.waitForSelector('#carModeBtn');
  await old.evaluate(async()=>{window.__saveData=true;await Lazy.load('feature:setlist-import');window.__pinned=window.SetlistImport;});
@@ -108,8 +126,12 @@ async function run(name){
  await page.evaluate(async()=>{const r=await navigator.serviceWorker.getRegistration();r.waiting.postMessage({type:'SKIP_WAITING'});});
  await wait(page,async tag=>{const c=await caches.open('ytplayer-assets');return(await(await c.match('/__ytp_asset_state')).json()).current.buildTag===tag;},target.buildTag);
  await page.reload();await page.waitForSelector('#carModeBtn');assert.equal(await page.evaluate(()=>Lazy.manifest.buildTag),target.buildTag);
-  // No warm: the new page gets a same-contract N-1 file immediately from disk.
+  // Completion now runs even with Save-Data. Evict a real completed entry to
  // exercise the same-contract N-1 fallback, rather than suppressing the job.
  await wait(page,async()=>{const r=await navigator.serviceWorker.getRegistration();return (await SwUpdate.askCacheStatus(r.active))?.offlineReady;});
  disconnected=true;await proxy.setOffline(true);await stop();
  const cacheKey='/video-edit.js?v='+target.files['/video-edit.js'].h;
  await page.evaluate(async key=>{localStorage.setItem('perf-offline','1');await(await caches.open('ytplayer-assets')).delete(key);},cacheKey);
  assert.equal(await page.evaluate(async key=>!!await(await caches.open('ytplayer-assets')).match(key),cacheKey),false);
  const stale=await page.evaluate(async key=>{const r=await fetch(key);return {h:r.headers.get('X-Asset-Hash'),body:await r.text()};},cacheKey);
  assert.equal(stale.h,previous.files['/video-edit.js'].h);assert.ok(!stale.body.includes('// phase3 new file'));
@@ -121,6 +143,7 @@ async function run(name){
  assert.ok(oldRequests.some(u=>u.includes('/car-mode.js?v='+previous.files['/car-mode.js'].h)));
  await old.evaluate(()=>Lazy.load('feature:setlist-import'));assert.equal(await old.evaluate(()=>window.SetlistImport===window.__pinned),true);
  // Warm new files explicitly; compatible, unexecuted old-page group selects new cached URL.
  await start();disconnected=false;await proxy.setOffline(false);await page.evaluate(()=>localStorage.removeItem('perf-offline'));
  await page.evaluate(async()=>{const r=await navigator.serviceWorker.getRegistration();r.active.postMessage({type:'WARM_ASSETS',saveData:false});});
  await wait(page,async key=>!!await(await caches.open('ytplayer-assets')).match(key),cacheKey);
  await old.evaluate(()=>Lazy.load('feature:video-edit'));assert.ok(oldRequests.some(u=>u.includes(cacheKey)));
@@ -128,8 +151,8 @@ async function run(name){
  const offlineTransportErrors=errors.filter(error=>name==='webkit'&&error.disconnected&&(error.message==='TypeError: Load failed'||/\/api\/(?:recommendations\?[^\s]*|version)\.$/.test(error.message)));
  assert.deepEqual(errors.filter(error=>!offlineTransportErrors.includes(error)),[]);
  if(offlineTransportErrors.length)assert.ok(failedRequests.some(url=>/\/api\/(?:recommendations|version)/.test(url))); 
-  results.push({browser:name,sourceBuildTag:previous.buildTag,classicSharedDefaults:true,cssOrderPreserved:true,settingsSearch:true,carControls:4,offlineFeature:true,firstUseNetwork:0,layoutsOffline:['glass-stage','bento-hub','f7-swipe','classic'],pinned:true,compatibleUnexecutedNewURL:true,incompatibleN1ReloadRequired:true,stagedN1:true,playbackGuard:true,prePaintLayout:true,offlineSettingsPanels:true,scriptErrors:[],offlineTransportErrors});
+  results.push({browser:name,sourceBuildTag:previous.buildTag,classicSharedDefaults:true,cssOrderPreserved:true,settingsSearch:true,carControls:4,offlineFeature:true,firstUseNetwork:0,layoutsOffline:['glass-stage','bento-hub','f7-swipe','classic'],pinned:true,compatibleUnexecutedNewURL:true,incompatibleN1ReloadRequired:true,stagedN1:true,appEvictionN1Offline:true,playbackGuard:true,prePaintLayout:true,offlineSettingsPanels:true,scriptErrors:[],offlineTransportErrors});
  console.log(name,'PASS');
- } finally {await browser?.close();await proxy?.close();await stop();}
+ } catch(error){console.error(name,error.stack);throw error;} finally {await browser?.close();proxy?.server.closeAllConnections();await proxy?.close();await stop();}
 }
-try{for(const name of requested==='all'?['chromium','webkit']:[requested])await run(name);writeFileSync(join(repo,'perf/results/phase3-lazy-2026-10-08.json'),JSON.stringify({results},null,2)+'\n');}finally{rmSync(scratch,{recursive:true,force:true});}
+try{for(const name of requested==='all'?['chromium','webkit']:[requested])await run(name);writeFileSync(args.includes('--out')?resolve(args[args.indexOf('--out')+1]):join(repo,'perf/results/phase3-lazy-2026-10-08.json'),JSON.stringify({results},null,2)+'\n');}finally{rmSync(scratch,{recursive:true,force:true});}
--- a/perf/measurement.mjs
+++ b/perf/measurement.mjs
@@ -0,0 +1,34 @@
 import assert from 'node:assert/strict';
 export function assertChangedAssets(requests, expected) {
 const paths=requests.filter(r=>r.bytes>0).map(r=>new URL(r.url,'http://localhost').pathname).filter(p=>/\.(?:js|css|woff2?|png|svg)$/.test(p)&&!['/sw.js','/asset-sync-core.js'].includes(p));
 assert.deepEqual([...new Set(paths)],[expected],'only the changed application asset transfers; worker checks and derived index/manifest are separate overhead');
 }
 export async function waitForIdleAssets(page) {
 if(!await page.evaluate(()=>!!window.Lazy?.warm))return;
 await page.evaluate(()=>Lazy.warm());
 const end=Date.now()+120000;
 while(true) {
  const ready=await page.evaluate(async()=>{
   const c=await caches.open('ytplayer-assets'),r=await c.match('/__ytp_asset_state');
   // Legacy rollback has no manifest state and installs its complete shell instead.
   if(!r)return (await caches.keys()).some(k=>/^ytplayer-(?!assets|thumbs|fonts)/.test(k));
   const m=(await r.json()).current;
   return (await Promise.all(Object.values(m.groups).flatMap(g=>g.files).map(async p=>{
    const response=await c.match(p+'?v='+m.files[p].h);
    return response?.headers.get('X-Asset-Hash')===m.files[p].h;
   }))).every(Boolean);
  });
  if(ready)return;
  if(Date.now()>end)throw Error('Idle warm did not complete before benchmark');
  await new Promise(r=>setTimeout(r,100));
 }
 }
 export function assertWarmAssets(requests) {
 const assets=requests.filter(r=>r.bytes>0&&/\.(?:js|css|woff2?|png|svg)(?:[?#]|$)/.test(r.url)&&!new URL(r.url,'http://localhost').pathname.endsWith('/sw.js'));
 assert.deepEqual(assets,[],'warm reload does not transfer unfinished shell assets');
 }
 export function assertColdAssets(requests) {
 const transferred=requests.filter(r=>r.bytes>0&&new URL(r.url,'http://localhost').pathname==='/app.js');
 assert.equal(transferred.length,1,'cold app.js transfers its body exactly once across page and worker');
 }
--- a/perf/measurement.test.mjs
+++ b/perf/measurement.test.mjs
@@ -0,0 +1,23 @@
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { assertChangedAssets, assertWarmAssets, assertColdAssets } from './measurement.mjs';
 test('changed CSS and feature measurements reject unrelated application transfers',()=>{
 const requests=[{url:'/sw.js',bytes:7000},{url:'/asset-sync-core.js',bytes:2000},{url:'/index.html',bytes:12000},{url:'/api/manifest',bytes:3000},{url:'/theme-glass.css?v=new',bytes:5000},{url:'/fonts/a.woff2',bytes:0}];
 assertChangedAssets(requests,'/theme-glass.css');
 assert.throws(()=>assertChangedAssets([...requests,{url:'/app.js?v=new',bytes:10000}],'/theme-glass.css'));
 assert.throws(()=>assertChangedAssets(requests.filter(r=>!r.url.includes('theme-glass')),'/theme-glass.css'));
 assertChangedAssets([{url:'/presenter.js?v=new',bytes:3200}],'/presenter.js');
 assert.throws(()=>assertChangedAssets([{url:'/presenter.js?v=new',bytes:3200},{url:'/icons/192.png',bytes:1000}],'/presenter.js'));
 });
 test('warm measurements reject unfinished shell downloads but allow API checks',()=>{
 assertWarmAssets([{url:'/api/version',bytes:62},{url:'/app.js?v=current',bytes:0}]);
 assert.throws(()=>assertWarmAssets([{url:'/theme-glass.css?v=current',bytes:5000}]));
 });
 test('cold acceptance rejects a second positive app response while allowing cache revalidation',()=>{
 assertColdAssets([{url:'/app.js?v=current',bytes:12000},{url:'/app.js?v=current',bytes:0}]);
 assert.throws(()=>assertColdAssets([{url:'/app.js?v=current',bytes:12000},{url:'/app.js?v=current',bytes:12000}]));
 assert.throws(()=>assertColdAssets([]));
 });
--- a/perf/migration.mjs
+++ b/perf/migration.mjs
@@ -12,6 +12,7 @@ import { chromium, webkit } from 'playwright';
 const repo = resolve(fileURLToPath(new URL('..', import.meta.url)));
 const commit = 'b77938a', oldTag = '1175f1a1d2c1';
 const args = process.argv.slice(2);
 const targetFrontend = args.includes('--frontend-source') ? resolve(args[args.indexOf('--frontend-source')+1]) : join(repo,'frontend');
 const profile = args.includes('--profile') ? args[args.indexOf('--profile')+1] : 'lossy';
 const browserName = args.includes('--browser') ? args[args.indexOf('--browser') + 1] : 'all';
 assert.ok(['all', 'chromium', 'webkit'].includes(browserName));
@@ -55,7 +56,7 @@ async function run(name) {
    });
  }
  async function start(old) {
-    symlinkSync(old ? join(repo, `perf/fixtures/shell-${oldTag}`) : join(repo, 'frontend'), join(cwd, 'public'));
+    symlinkSync(old ? join(repo, `perf/fixtures/shell-${oldTag}`) : targetFrontend, join(cwd, 'public'));
    output = '';
    child = spawn('bun', [old ? join(scratch, 'server/server.js') : join(repo, 'server/server.js')], {
      cwd, env: { ...process.env, BUILD_TAG: '', ASSET_HASHING: old ? '0' : '1', PORT: String(port),
@@ -102,7 +103,9 @@ async function run(name) {
    await page.waitForFunction(() => !!navigator.serviceWorker.controller, { timeout: 90000 });
    assert.equal(await page.locator('meta[name="ytp-build"]').getAttribute('content'), oldTag);
    assert.equal(banners, 0, 'no first-install banner');
    console.log(name,'old shell installed');
    await stop(); unlinkSync(join(cwd, 'public')); await start(false);
    console.log(name,'new server started');
    const backend = `http://127.0.0.1:${port}`;
    const manifest = await (await fetch(`${backend}/api/manifest`)).json();
    assert.notEqual(manifest.buildTag, oldTag);
@@ -112,17 +115,19 @@ async function run(name) {
        const response = await fetch(`${backend}${path}${query}`);
        assert.equal(response.status, 200);
        assert.equal(response.headers.get('x-asset-hash'), manifest.files[path].h);
-        assert.deepEqual(Buffer.from(await response.arrayBuffer()), readFileSync(join(repo, 'frontend', path.slice(1))));
+        assert.deepEqual(Buffer.from(await response.arrayBuffer()), readFileSync(join(targetFrontend, path.slice(1))));
        if (query.includes('?v=')) assert.equal(response.headers.get('cache-control'), 'no-store');
      }
    }
    proxy.resetStats(); proxy.startTracking();
    const started = Date.now();
    // Use the old application's public functions; no simulated update helper.
    console.log(name,'requesting old-client update');
    await page.evaluate(async () => {
      await checkBuildTag();
      await (await navigator.serviceWorker.getRegistration()).update();
    });
    console.log(name,'old-client update check returned');
    await waitAsync(page,async () => !!(await navigator.serviceWorker.getRegistration())?.waiting);
    await page.waitForFunction(() => /Update available/.test(document.querySelector('#modalTitle')?.textContent || '') && !document.querySelector('#modal').classList.contains('hidden'));
    assert.equal(banners, 1, 'exactly one offer before refresh');
@@ -137,17 +142,26 @@ async function run(name) {
      return !reg.installing && reg.waiting?.state==='installed' &&
        !!await cache.match('/__ytp_candidate/'+tag);
    }, manifest.buildTag);
    console.log(name,'candidate installed');
    const status = await page.evaluate(async()=>SwUpdate.askCacheStatus((await navigator.serviceWorker.getRegistration()).waiting,{timeoutMs:4000}));
    assert.equal(status?.ready,true,'new worker confirms persistent cache to old helper');
    assert.equal(status.version,manifest.buildTag,'status belongs to the target build');
    console.log(name,'ready status received');
    const oldTab = await context.newPage();
    await oldTab.goto(origin,{waitUntil:'load'});
    assert.equal(await oldTab.locator('meta[name="ytp-build"]').getAttribute('content'),oldTag);
    const oldBytes = await oldTab.evaluate(async()=>await (await fetch('/app.js')).text());
-    await page.locator('#modal').getByRole('button', { name: 'Refresh UI', exact: true }).click();
+    // Bring the updating page forward after checking the retained old tab.
    await page.bringToFront();
    console.log(name,'clicking legacy refresh');
    await page.locator('#modal').getByRole('button', { name: 'Refresh UI', exact: true }).click({noWaitAfter:true,timeout:15000});
    console.log(name,'legacy refresh clicked');
    await page.waitForFunction(tag => document.querySelector('meta[name="ytp-build"]')?.content === tag && typeof checkBuildTag === 'function', manifest.buildTag, { timeout: 90000 });
    console.log(name,'new page loaded');
    await page.waitForFunction(() => !sessionStorage.getItem('ytpUpdateAttempt'));
    console.log(name,'update outcome cleared');
    await page.evaluate(async () => { await checkBuildTag(); await checkBuildTag(); await checkBuildTag(); });
    console.log(name,'banner rechecks complete');
    await sleep(2000);
    assert.equal(navigations - before, 1, 'one reload, no update loop');
    assert.equal(banners, 1, 'no banner after applying the current build');
@@ -225,7 +239,7 @@ async function run(name) {
    const result = { browser: name, oldTag, newTag: manifest.buildTag, banners, updateReloads: 1, cachedFiles: cacheResult.count, durationMs, wireBytes: stats.totalWireBytes, offline: true, legacyURLs: 21, profile, userInitiatedOnly: true, playbackGuard: true, evictionRepair: true, incrementalRefresh: true, offlineTransportErrors: errors.length };
    console.log(JSON.stringify(result));
    return result;
-  } finally {
+  } catch(error) { console.error(name,error.stack); throw error; } finally {
    await browser?.close();
    if (proxy) { proxy.server.closeAllConnections(); await proxy.close(); }
    await stop();
--- a/perf/offline-complete.mjs
+++ b/perf/offline-complete.mjs
@@ -0,0 +1,134 @@
 #!/usr/bin/env node
 // Real-server completeness and offline UI regression gate. All scratch stays in this worktree.
 import {spawn} from 'node:child_process';
 import {mkdtempSync,cpSync,mkdirSync,writeFileSync,rmSync} from 'node:fs';
 import {resolve,join} from 'node:path';
 import {createServer} from 'node:net';
 import {chromium,webkit} from 'playwright';
 import {createThrottleProxy} from './proxy.mjs';
 const repo=resolve(new URL('..',import.meta.url).pathname), args=process.argv.slice(2);
 const option=(key,fallback)=>args.includes(key)?args[args.indexOf(key)+1]:fallback;
 const source=resolve(option('--source',join(repo,'frontend'))),legacy=args.includes('--legacy');
 const scratch=mkdtempSync(join(repo,'perf/.tmp/offline-')),results=[];
 const sleep=ms=>new Promise(r=>setTimeout(r,ms));
 async function poll(fn,timeout=60000){const end=Date.now()+timeout;while(Date.now()<end){if(await fn())return true;await sleep(100);}return false;}
 async function run(engine){
 const cwd=join(scratch,engine);mkdirSync(cwd);cpSync(source,join(cwd,'public'),{recursive:true});
 const socket=createServer();await new Promise(r=>socket.listen(0,'127.0.0.1',r));const port=socket.address().port;await new Promise(r=>socket.close(r));
 let origin='http://127.0.0.1:'+port, log='',browser,proxy,context;
 const child=spawn('bun',[join(repo,'server/server.js')],{cwd,env:{...process.env,PORT:String(port),ASSET_HASHING:legacy?'0':'1',ASSET_SYNC:legacy?'0':'1',BUILD_TAG:legacy?'1175f1a1d2c1':'',DB_PATH:join(cwd,'db.sqlite'),DATA_DIR:join(cwd,'data'),MEDIA_DIR:join(cwd,'media'),UPLOAD_DIR:join(cwd,'uploads')},stdio:['ignore','pipe','pipe']});
 for(const stream of [child.stdout,child.stderr])stream.on('data',c=>log=(log+c).slice(-6000));
 const result={engine,legacy,failures:[],events:[],layouts:[],conditions:[]};results.push(result);
 try{
  if(!await poll(async()=>{try{return(await fetch(origin+'/api/version')).ok;}catch{return false;}}))throw Error(log);
  proxy=createThrottleProxy({targetPort:port,profile:'unthrottled'});proxy.startTracking();origin='http://127.0.0.1:'+await proxy.listen();
  const manifest=await(await fetch(origin+'/api/manifest')).json();result.build=manifest.buildTag;
  const type={chromium,webkit}[engine];
  const openContext=async()=>{if(engine==='webkit'){browser ||= await type.launch();return browser.newContext();}return type.launchPersistentContext(join(cwd,'profile'),{headless:true});};
  context=await openContext();
  const configure=async()=>{await context.route('**/*',r=>r.continue());return context.addInitScript(()=>{Object.defineProperty(navigator,'onLine',{configurable:true,get:()=>localStorage.getItem('perf-offline')!=='1'});Object.defineProperty(navigator,'connection',{configurable:true,value:{get saveData(){return localStorage.getItem('perf-save-data')==='1';}}});});};
  await configure();if(args.includes('--save-data'))await context.addInitScript(()=>localStorage.setItem('perf-save-data','1'));
  let offline=false;
  const attach=page=>{
   page.on('response',r=>{if(offline&&r.status()>=400&&!new URL(r.url()).pathname.startsWith('/api/'))result.failures.push({kind:'http',url:r.url(),status:r.status()});});
   page.on('requestfailed',r=>{if(offline)result.events.push({kind:'requestfailed',url:r.url(),error:r.failure()?.errorText});});
   page.on('console',m=>{if(!offline&&['warning','error'].includes(m.type()))console.log(engine,'install console:',m.text());if(offline&&m.type()==='error')result.events.push({kind:'console',message:m.text()});});
   page.on('pageerror',e=>{if(offline)result.events.push({kind:'pageerror',message:e.message,stack:e.stack});});
  };
  let page=await context.newPage();attach(page);
  const boot=async()=>{await page.goto(origin);await page.waitForFunction(()=>typeof data!=='undefined'&&document.querySelector('[aria-label="Car mode"]'));};
  const inventory=(includeOptional=false)=>page.evaluate(async({manifest,legacy,includeOptional})=>{
   const names=await caches.keys(),cache=await caches.open(legacy?names.find(n=>n.startsWith('ytplayer-')&&!['ytplayer-assets','ytplayer-fonts','ytplayer-thumbs'].includes(n)):'ytplayer-assets');
   const optional=new Set(Object.values(manifest.groups||{}).filter(group=>group.offlineOptIn).flatMap(group=>group.files||[]));
   const expected=Object.entries(manifest.files).filter(([path])=>legacy||includeOptional||!optional.has(path));
   const missing=[];for(const [path,file]of expected){const r=await cache.match(legacy?path:path+'?v='+file.h);if(!r||(!legacy&&r.headers.get('X-Asset-Hash')!==file.h))missing.push(path);}
   return{total:expected.length,manifestTotal:Object.keys(manifest.files).length,optionalExcluded:Object.keys(manifest.files).length-expected.length,missing};
  },{manifest,legacy,includeOptional});
  const started=Date.now();console.log(engine,'install boot');await boot();console.log(engine,'waiting for worker activation');if(!await poll(()=>page.evaluate(async()=>!!(await navigator.serviceWorker.getRegistration())?.active),30000))throw Error('Worker did not activate: '+JSON.stringify(await page.evaluate(async()=>{const r=await navigator.serviceWorker.getRegistration();return {active:r?.active?.state,waiting:r?.waiting?.state,installing:r?.installing?.state,caches:await caches.keys(),keys:(await(await caches.open('ytplayer-assets')).keys()).map(r=>new URL(r.url).pathname)};})));await page.evaluate(()=>navigator.serviceWorker.ready);console.log(engine,'worker active');await page.evaluate(()=>window.Lazy?.warm());
  await poll(async()=>!(await inventory()).missing.length,Number(option('--warm-timeout','15000')));
  if(!legacy){const wasmPath='/vendor/jamesdsp/dsp/jamesdsp.wasm',wasm=manifest.files[wasmPath];if(wasm){const cached=await page.evaluate(async key=>!!await(await caches.open('ytplayer-assets')).match(key),wasmPath+'?v='+wasm.h);if(cached)result.failures.push({kind:'opt-in-wasm-cached-by-default',path:wasmPath});}}
  if(!legacy){
   await page.evaluate(()=>{data.settings.jamesDsp={...data.settings.jamesDsp,downloadForOffline:true};persist();reportDspOfflineOptIn();});
   const dspReady=await poll(async()=>{const inventoryNow=await inventory(true);return !inventoryNow.missing.length;},120000);
   result.conditions.push({name:'explicit audio-effects offline opt-in completes optional assets',complete:dspReady});
   if(!dspReady)result.failures.push({kind:'optional-dsp-completion',paths:(await inventory(true)).missing});
  }
  console.log(engine,'inventory complete');result.installMs=Date.now()-started;result.inventory=await inventory();result.installWire=proxy.getStats();result.saveData=await page.evaluate(()=>navigator.connection?.saveData);
  if(result.inventory.missing.length)result.failures.push({kind:'incomplete',paths:result.inventory.missing});
  // Offline navigation always starts from a controlled document.
  await page.reload();await page.waitForFunction(()=>typeof data!=='undefined'&&document.querySelector('[aria-label="Car mode"]'));
  await page.evaluate(()=>localStorage.setItem('perf-offline','1'));if(engine==='chromium')await context.setOffline(true);await proxy.setOffline(true);offline=true;result.offlineTransport=engine==='chromium'?'context.setOffline + proxy':'proxy (Linux WebKit setOffline breaks cached navigation)';
  for(const layout of ['classic','f7-swipe','glass-stage','bento-hub']){
   const check={layout,opened:[],errors:[]};result.layouts.push(check);
   const attempt=async(name,fn)=>{console.log(engine,layout,name);try{await Promise.race([fn(),new Promise((_,reject)=>{const t=setTimeout(()=>reject(Error('Action timed out')),10000);t.unref();})]);check.opened.push(name);}catch(e){check.errors.push({name,error:e.message});result.failures.push({layout,name,error:e.message});}};
   await attempt('reload',async()=>{await page.evaluate(layout=>{data.settings.layout=layout;localStorage.setItem('_ytpdata',JSON.stringify(data));},layout);await page.reload();await page.waitForFunction(()=>typeof data!=='undefined'&&document.querySelector('[aria-label="Car mode"]'),null,{timeout:10000});});
   for(const view of ['search','queue','history','saved','downloads','settings','nowPlaying'])await attempt(view,()=>page.evaluate(async type=>{view={type};if(type==='settings')await renderSettings();else render();await new Promise(r=>setTimeout(r,150));},view));
   await attempt('sidebar',()=>page.evaluate(()=>{document.querySelector('#menuBtn')?.click();document.querySelector('#sidebar')?.classList.remove('open');}));
   await attempt('all lazy groups',()=>page.evaluate(async()=>{if(window.Lazy)for(const [name,group] of Object.entries(Lazy.manifest.groups))if(group.background)await Lazy.load(name);}));
   for(const section of ['piano','midi','floating-lyrics','vocal-reducer','equalizer','setlist-import','broadcast','party-dj','direct-transfer'])await attempt(section,async()=>{await page.evaluate(async()=>{view={type:'settings'};await renderSettings();});await page.waitForSelector('[data-section="'+section+'"]',{timeout:5000,state:'attached'});await page.evaluate(id=>document.querySelector('[data-section="'+id+'"]').click(),section);await page.waitForTimeout(100);});
   await attempt('presenter',async()=>{await page.evaluate(async()=>{history.replaceState(null,'','/?present=');await Presenter.boot();});await page.waitForSelector('#presenterView:not(.hidden)',{timeout:5000});await page.locator('#pvCode').fill('x');await page.locator('#pvPairBtn').click();if(!/6-digit/.test(await page.locator('#pvMsg').textContent()))throw Error('Presenter validation did not run');await page.evaluate(()=>{document.querySelector('#presenterView').classList.add('hidden');document.body.classList.remove('presenter-open');history.replaceState(null,'','/');});});
   await attempt('video editor',async()=>{await page.evaluate(()=>openVideoEditor({id:'upl_0123456789ab',title:'Offline edit',duration:120}));if(!await page.evaluate(()=>window.OPFS?.isSupported())){if(!/Editing needs offline storage/.test(await page.locator('#toastContainer').textContent()))throw Error('Missing unsupported-storage explanation');result.unsupportedFeatures ||= [];if(!result.unsupportedFeatures.includes('video editor: OPFS unavailable in Linux WebKit'))result.unsupportedFeatures.push('video editor: OPFS unavailable in Linux WebKit');return;}await page.waitForSelector('.video-editor',{timeout:5000});await page.locator('.ve-from').fill('0:10');await page.locator('.ve-to').fill('0:20');await page.locator('.ve-add').click();if(!/10/.test(await page.locator('.ve-cuts').textContent()))throw Error('Cut was not added');await page.evaluate(()=>closeModal());});
   await attempt('lyrics editor',async()=>{await page.evaluate(async()=>{data.profile={name:'offline-test'};await Notes.load({id:'abcdefghijk',title:'Offline lyrics'});document.querySelector('#lyricsEditBtn').click();});await page.waitForSelector('.lyr-editor-text',{timeout:5000});await page.locator('.lyr-editor-text').fill('[0:10] Offline lyric');await page.evaluate(()=>closeModal());});
   await attempt('car',async()=>{await page.evaluate(()=>document.querySelector('[aria-label="Car mode"]').click());await page.waitForSelector('.car-mode',{timeout:5000});await page.getByRole('button',{name:'Exit Car mode'}).click();});
   await attempt('remote',async()=>{await page.evaluate(()=>document.querySelector('#navRemoteBtn').click());await page.waitForSelector('#modal:not(.hidden)',{timeout:5000});await page.evaluate(()=>closeModal());});
   await attempt('party',async()=>{await page.evaluate(()=>document.querySelector('#navPartyBtn').click());await page.waitForSelector('#partyPanel:not(.hidden)',{timeout:5000});await page.evaluate(()=>document.querySelector('#partyPanel').classList.add('hidden'));});
   await attempt('share/external',()=>page.evaluate(async()=>{current={meta:{id:'benchmedia01',title:'Offline fixture'}};await Share.open();closeModal();await External.open();closeModal();}));
   await attempt('stats',async()=>{await page.evaluate(()=>{view={type:'stats'};render();});await page.waitForSelector('.stats-empty, .stats',{timeout:5000});});
   await attempt('service',()=>page.evaluate(()=>{enterServiceMode();exitServiceMode();}));
   await attempt('runtime URLs',async()=>{const failures=await page.evaluate(async manifest=>{const paths=Object.keys(manifest.files).filter(p=>/\.(?:woff2|png|webmanifest)$/.test(p)||/\/(?:opfs-worker|hash-worker|direct-recv-worker|p2p-recv-worker|sha256-wasm)\.js$/.test(p)||p==='/piano-engine.mjs'||p==='/vendor/framework7-swipe.min.js');const bad=[];for(const path of paths){const r=await fetch(path);await r.arrayBuffer();if(!r.ok)bad.push(path+': '+r.status);}return bad;},manifest);if(failures.length)throw Error(failures.join(', '));});
  }
  const apiFailures=result.events.filter(e=>e.kind==='requestfailed'&&new URL(e.url).pathname.startsWith('/api/'));
  result.expectedTransportErrors=result.events.filter(e=>e.kind==='pageerror'&&engine==='webkit'&&!e.stack&&apiFailures.length&&(e.message==='TypeError: Load failed'||e.message.includes('/api/')));
  result.staticFailures=result.events.filter(e=>e.kind==='requestfailed'&&new URL(e.url).origin===origin&&!new URL(e.url).pathname.startsWith('/api/')&&new URL(e.url).pathname!=='/sw.js');
  result.scriptErrors=result.events.filter(e=>e.kind==='pageerror'&&!result.expectedTransportErrors.includes(e));
  result.failures.push(...result.staticFailures,...result.scriptErrors);
  // Resumption and Save-Data/two-tab checks use the same persisted CacheStorage.
  offline=false;if(engine==='chromium')await context.setOffline(false);await proxy.setOffline(false);await page.evaluate(()=>localStorage.removeItem('perf-offline'));
  if(!legacy&&args.includes('--conditions')){
   await proxy.setOffline(true);
   await page.evaluate(async manifest=>{const c=await caches.open('ytplayer-assets');for(const p of Object.keys(manifest.files).filter(p=>manifest.files[p].g!=='core'))await c.delete(p+'?v='+manifest.files[p].h);localStorage.setItem('perf-save-data','1');},manifest);
   await page.evaluate(()=>navigator.serviceWorker.controller.postMessage({type:'COMPLETE_ASSETS'}));
   await poll(()=>page.evaluate(async()=>{const c=await caches.open('ytplayer-assets'),s=await(await c.match('/__ytp_asset_state')).json(),r=await c.match('/__ytp_completion/'+s.current.buildTag);return r&&(await r.json()).running;}),10000);
   const interrupted=await inventory();
   if(!interrupted.missing.length)throw Error('Interruption did not leave missing assets');
   if(engine==='chromium'){const cdp=await context.newCDPSession(page);await cdp.send('ServiceWorker.enable');await cdp.send('ServiceWorker.stopAllWorkers');await cdp.detach();}
   if(engine==='chromium'){
    await page.close();await context.close();await proxy.setOffline(false);
    context=await openContext();await configure();page=await context.newPage();attach(page);await boot();
   }else{
    // Linux WebKit persistent contexts do not share page/worker CacheStorage.
    // Exercise a real worker re-registration in the same browser context.
    await page.evaluate(async()=>{const r=await navigator.serviceWorker.getRegistration();await r.unregister();});
    await page.close();await proxy.setOffline(false);page=await context.newPage();attach(page);await boot();
   }
   const other=await context.newPage();await other.goto(origin);await other.waitForSelector('#carModeBtn');
   const complete=await poll(async()=>!(await inventory()).missing.length);
   result.conditions.push({name:engine==='webkit'?'page closed, worker re-registration, Save-Data, two tabs':'interrupted job, page closed, browser restarted with same profile, Save-Data, two tabs',interruptedMissing:interrupted.missing.length,storageMode:engine==='webkit'?'same-context worker re-registration; Linux WebKit persistent CacheStorage is broken':'persistent disk profile',complete});
   if(!complete)result.failures.push({kind:'resume',inventory:await inventory(),status:await page.evaluate(async()=>({registration:!!(await navigator.serviceWorker.getRegistration())?.active}))});
   // Evict one optional file and require the online event alone to restart work.
   const path='/piano-engine.mjs';await page.evaluate(async({path,manifest})=>{await(await caches.open('ytplayer-assets')).delete(path+'?v='+manifest.files[path].h);localStorage.removeItem('perf-save-data');window.dispatchEvent(new Event('online'));},{path,manifest});
   const onlineResume=await poll(async()=>!(await inventory()).missing.length);result.conditions.push({name:'online event, Save-Data off',complete:onlineResume});if(!onlineResume)result.failures.push({kind:'online-resume'});
   if(engine==='chromium'){
    await sleep(100);await proxy.setOffline(true);
    await context.route('**/admin.html?offline-inspector=1',route=>route.fulfill({contentType:'text/html',body:'<!doctype html><title>Cache inspector</title>'}));
    const inspector=await context.newPage();await inspector.goto(origin+'/admin.html?offline-inspector=1');const cdp=await context.newCDPSession(inspector);
    const {caches:names}=await cdp.send('CacheStorage.requestCacheNames',{securityOrigin:origin});
    const cacheId=names.find(c=>c.cacheName==='ytplayer-assets').cacheId;
    await page.evaluate(async manifest=>{const c=await caches.open('ytplayer-assets');for(const path of Object.keys(manifest.files).filter(p=>manifest.files[p].g!=='core'))await c.delete(path+'?v='+manifest.files[path].h);navigator.serviceWorker.controller.postMessage({type:'COMPLETE_ASSETS'});},manifest);
    await poll(()=>page.evaluate(async()=>{const c=await caches.open('ytplayer-assets'),s=await(await c.match('/__ytp_asset_state')).json(),r=await c.match('/__ytp_completion/'+s.current.buildTag);return r&&(await r.json()).running;}),5000);
    await page.close();await other.close();await proxy.setOffline(false);
    const optionalPaths=new Set(Object.values(manifest.groups||{}).filter(group=>group.offlineOptIn==='jamesDsp').flatMap(group=>group.files||[]));
    const includeOptional=await page.evaluate(async()=>{const cache=await caches.open('ytplayer-assets'),response=await cache.match('/__ytp_offline_opt_ins');return (await response?.json()||[]).includes('jamesDsp');});
    const requiredFiles=Object.entries(manifest.files).filter(([path])=>includeOptional||!optionalPaths.has(path));
    const withoutPage=await poll(async()=>{const {cacheDataEntries:entries}=await cdp.send('CacheStorage.requestEntries',{cacheId,skipCount:0,pageSize:1000});return requiredFiles.every(([path,file])=>entries.some(e=>e.requestURL===origin+path+'?v='+file.h&&e.responseHeaders.some(h=>h.name.toLowerCase()==='x-asset-hash'&&h.value===file.h)));});
    result.conditions.push({name:'worker completes with every application page closed; passive same-origin inspector only',complete:withoutPage});
    if(!withoutPage)result.failures.push({kind:'completion-without-page'});
    await cdp.detach();await inspector.close();
   }else await other.close();
  }
  result.inventory=await inventory(!legacy);
  console.log(engine,JSON.stringify({missing:result.inventory.missing,inventory:result.inventory.total,manifestFiles:result.inventory.manifestTotal,failures:result.failures,conditions:result.conditions}));
 }catch(e){result.failures.push({kind:'harness',error:e.stack});console.log(engine,e.message);}finally{await context?.close();await browser?.close();await proxy?.close();child.kill('SIGTERM');if(child.exitCode===null)await new Promise(r=>child.once('exit',r));}
 }
 try{for(const engine of option('--browser','all')==='all'?['chromium','webkit']:[option('--browser')])await run(engine);}finally{writeFileSync(resolve(option('--out',join(repo,'perf/results/offline-complete.json'))),JSON.stringify({results},null,2)+'\n');rmSync(scratch,{recursive:true,force:true});}
 if(results.some(r=>r.failures.length))process.exitCode=1;
--- a/perf/proxy.mjs
+++ b/perf/proxy.mjs
@@ -47,6 +47,7 @@ export function categorizeContentType(contentType, urlPath) {
 */
 export function createThrottleProxy({ targetPort, profile = 'lte' }) {
  let activeTracking = false;
  let trackingStart = 0;
  let requestCount = 0;
  let requests = [];
  let totalWireBytes = 0;
@@ -79,6 +80,7 @@ export function createThrottleProxy({ targetPort, profile = 'lte' }) {
      return;
    }
    const requestStart = Date.now();
    reqIndex++;
    const currentReqIndex = reqIndex;
@@ -114,7 +116,8 @@ export function createThrottleProxy({ targetPort, profile = 'lte' }) {
        let recorded;
        if (activeTracking) {
          requestCount++;
-          recorded={url:clientReq.url,status:upRes.statusCode,bytes:0};
+          recorded={url:clientReq.url,status:upRes.statusCode,bytes:0,index:currentReqIndex,startMs:requestStart-trackingStart,headersMs:Date.now()-trackingStart};
          clientRes.once('finish',()=>{recorded.endMs=Date.now()-trackingStart;});
          requests.push(recorded);
        }
@@ -176,6 +179,7 @@ export function createThrottleProxy({ targetPort, profile = 'lte' }) {
        server.close(resolve);
      }),
    startTracking: () => {
      trackingStart = Date.now();
      activeTracking = true;
    },
    stopTracking: () => {
--- a/perf/results/autosave-b77938a.json
+++ b/perf/results/autosave-b77938a.json
@@ -0,0 +1,208 @@
 {
  "revision": "/home/josh/development/personal/ytplayer-codex/wt-autosave/perf/fixtures/shell-1175f1a1d2c1",
  "browsers": {
    "chromium": [
      {
        "scenario": "open-default",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "open-audio-only",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-prefer-stream",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-add",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-add-setting-off",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-existing-add",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-boot",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-boot-off",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "pinned-boot",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "settings-enable",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "settings-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
      }
    ],
    "webkit": [
      {
        "scenario": "open-default",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-save-first",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-audio-only",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-prefer-stream",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-add",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-add-setting-off",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-existing-add",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-boot",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-boot-off",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "pinned-boot",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "settings-enable",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "settings-save-first",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      }
    ]
  },
  "failures": [],
  "unsupported": [
    "webkit"
  ],
  "buildTag": "1175f1a1d2c1"
 }
--- a/perf/results/autosave-current.json
+++ b/perf/results/autosave-current.json
@@ -0,0 +1,110 @@
 {
  "revision": "/home/josh/development/personal/ytplayer-codex/wt-autosave/frontend",
  "browsers": {
    "chromium": [
      {
        "scenario": "open-default",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "open-audio-only",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-prefer-stream",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-add",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-add-setting-off",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-existing-add",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-boot",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-boot-off",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "pinned-boot",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "settings-enable",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
      },
      {
        "scenario": "settings-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
      }
    ]
  },
  "failures": [],
  "unsupported": [],
  "buildTag": "e93dbca4dc5a"
 }
--- a/perf/results/autosave-main.json
+++ b/perf/results/autosave-main.json
@@ -0,0 +1,208 @@
 {
  "revision": "main",
  "browsers": {
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      {
        "scenario": "open-default",
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        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-save-first",
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        "saved": true,
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      },
      {
        "scenario": "open-audio-only",
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        "errors": []
      },
      {
        "scenario": "open-prefer-stream",
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        "scenario": "playlist-add",
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        "calls": 1,
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        "scenario": "playlist-add-setting-off",
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        "bytes": 30290,
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        "scenario": "playlist-existing-add",
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        "bytes": 30290,
        "calls": 1,
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      {
        "scenario": "playlist-boot",
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        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
      },
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        "scenario": "playlist-boot-off",
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        "saved": false,
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        "calls": 0,
        "errors": []
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      {
        "scenario": "pinned-boot",
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        "saved": true,
        "bytes": 30290,
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      },
      {
        "scenario": "settings-enable",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "settings-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
      }
    ],
    "webkit": [
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        "errors": []
      },
      {
        "scenario": "open-save-first",
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        "errors": []
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      {
        "scenario": "open-audio-only",
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        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-prefer-stream",
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        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-add",
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        "calls": 1,
        "errors": []
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      {
        "scenario": "playlist-add-setting-off",
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        "calls": 1,
        "errors": []
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      {
        "scenario": "playlist-existing-add",
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      {
        "scenario": "playlist-boot",
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        "scenario": "playlist-boot-off",
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        "errors": []
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        "scenario": "pinned-boot",
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        "errors": []
      },
      {
        "scenario": "settings-enable",
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        "saved": false,
        "bytes": 0,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "settings-save-first",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      }
    ]
  },
  "failures": [],
  "unsupported": [
    "webkit"
  ],
  "buildTag": "c3dbdd7039db"
 }
--- a/perf/results/autosave-phase1.json
+++ b/perf/results/autosave-phase1.json
@@ -0,0 +1,110 @@
 {
  "revision": "codex/phase1",
  "browsers": {
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        "scenario": "open-default",
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        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
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      {
        "scenario": "open-save-first",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "open-audio-only",
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        "saved": false,
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        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-prefer-stream",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-add",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-add-setting-off",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-existing-add",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-boot",
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        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-boot-off",
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        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "pinned-boot",
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        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "settings-enable",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
      },
      {
        "scenario": "settings-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
      }
    ]
  },
  "failures": [],
  "unsupported": [],
  "buildTag": "288787b9f7db"
 }
--- a/perf/results/autosave-phase2.json
+++ b/perf/results/autosave-phase2.json
@@ -0,0 +1,110 @@
 {
  "revision": "codex/phase2",
  "browsers": {
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      {
        "scenario": "open-default",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
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      {
        "scenario": "open-save-first",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "open-audio-only",
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        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-prefer-stream",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-add",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-add-setting-off",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-existing-add",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-boot",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-boot-off",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "pinned-boot",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "settings-enable",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
      },
      {
        "scenario": "settings-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
      }
    ]
  },
  "failures": [],
  "unsupported": [],
  "buildTag": "4f7090fff60c"
 }
--- a/perf/results/autosave-phase3.json
+++ b/perf/results/autosave-phase3.json
@@ -0,0 +1,60 @@
 {
  "revision": "codex/phase3",
  "browsers": {
    "chromium": [
      {
        "scenario": "open-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
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      {
        "scenario": "playlist-add",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
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      {
        "scenario": "playlist-boot",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
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      {
        "scenario": "pinned-boot",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
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      {
        "scenario": "settings-enable",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "settings-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
      }
    ]
  },
  "failures": [],
  "unsupported": [],
  "buildTag": "bea1f63eba85"
 }
--- a/perf/results/autosave-phase4.json
+++ b/perf/results/autosave-phase4.json
@@ -0,0 +1,60 @@
 {
  "revision": "codex/phase4",
  "browsers": {
    "chromium": [
      {
        "scenario": "open-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
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      {
        "scenario": "playlist-add",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
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      {
        "scenario": "playlist-boot",
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        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
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      {
        "scenario": "pinned-boot",
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        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
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      {
        "scenario": "settings-enable",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "settings-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
      }
    ]
  },
  "failures": [],
  "unsupported": [],
  "buildTag": "c3dbdd7039db"
 }
--- a/perf/results/autosave-phase5.json
+++ b/perf/results/autosave-phase5.json
@@ -0,0 +1,60 @@
 {
  "revision": "codex/phase5",
  "browsers": {
    "chromium": [
      {
        "scenario": "open-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-add",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
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      {
        "scenario": "playlist-boot",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
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      {
        "scenario": "pinned-boot",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
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      {
        "scenario": "settings-enable",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
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      {
        "scenario": "settings-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
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    ]
  },
  "failures": [],
  "unsupported": [],
  "buildTag": "c3dbdd7039db"
 }
--- a/perf/results/autosave-rollback.json
+++ b/perf/results/autosave-rollback.json
@@ -0,0 +1,62 @@
 {
  "revision": "/home/josh/development/personal/ytplayer-codex/wt-autosave/frontend",
  "browsers": {
    "chromium": [
      {
        "scenario": "open-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
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      {
        "scenario": "playlist-add",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-boot",
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        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "pinned-boot",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "settings-enable",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
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      {
        "scenario": "settings-save-first",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
      }
    ]
  },
  "failures": [],
  "unsupported": [],
  "buildTag": "2b1c433b19aa"
 }
--- a/perf/results/dsp-cold-check.json
+++ b/perf/results/dsp-cold-check.json
--- a/perf/results/final-2026-10-08.json
+++ b/perf/results/final-2026-10-08.json
--- a/perf/results/hygiene-after.json
+++ b/perf/results/hygiene-after.json
--- a/perf/results/hygiene-assets.json
+++ b/perf/results/hygiene-assets.json
@@ -0,0 +1,260 @@
 {
  "before": {
    "count": 151,
    "rawBytes": 2044337,
    "manifestBytes": 15601
  },
  "after": {
    "count": 102,
    "rawBytes": 1807059,
    "manifestBytes": 12551
  },
  "excluded": [
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      "path": "/admin.html",
      "rawBytes": 102005,
      "brBytes": 24050
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    {
      "path": "/app-seams.test.js",
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      "brBytes": 2457
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      "path": "/asset-sync-core.test.js",
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      "brBytes": 2525
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      "brBytes": 1984
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    {
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      "brBytes": 765
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    {
      "path": "/audio-continuity.test.js",
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      "brBytes": 813
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    {
      "path": "/bento-hub.test.js",
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      "brBytes": 283
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    {
      "path": "/car-mode.test.js",
      "rawBytes": 2556,
      "brBytes": 973
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      "brBytes": 521
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    {
      "path": "/direct-stream.test.js",
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      "brBytes": 390
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    {
      "path": "/download-errors.test.js",
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    {
      "path": "/downloads-page.test.js",
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      "brBytes": 699
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      "path": "/downloads.test.js",
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      "brBytes": 639
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      "brBytes": 380
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    {
      "path": "/fonts/PlusJakartaSans-OFL.txt",
      "rawBytes": 4402,
      "brBytes": 1428
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    {
      "path": "/fullscreen-orientation.test.js",
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      "brBytes": 404
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    {
      "path": "/glass-controls.test.js",
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      "brBytes": 412
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      "brBytes": 2030
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      "brBytes": 706
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      "brBytes": 338
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      "brBytes": 1430
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      "brBytes": 244
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      "brBytes": 675
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      "brBytes": 234
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      "brBytes": 731
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      "brBytes": 484
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      "brBytes": 224
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      "brBytes": 683
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      "brBytes": 855
    },
    {
      "path": "/visible-timer.test.js",
      "rawBytes": 2827,
      "brBytes": 687
    },
    {
      "path": "/vocal-reducer.test.js",
      "rawBytes": 648,
      "brBytes": 235
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    {
      "path": "/wasm/loudness.c",
      "rawBytes": 2132,
      "brBytes": 861
    },
    {
      "path": "/wasm/sha256.c",
      "rawBytes": 2428,
      "brBytes": 1064
    },
    {
      "path": "/worker-imports.test.js",
      "rawBytes": 1370,
      "brBytes": 636
    }
  ],
  "excludedBrBytes": 64694
 }
--- a/perf/results/hygiene-before-rollback-offline.json
+++ b/perf/results/hygiene-before-rollback-offline.json
--- a/perf/results/hygiene-before.json
+++ b/perf/results/hygiene-before.json
--- a/perf/results/hygiene-migration.json
+++ b/perf/results/hygiene-migration.json
@@ -0,0 +1,41 @@
 {
  "commit": "b77938a",
  "results": [
    {
      "browser": "chromium",
      "oldTag": "1175f1a1d2c1",
      "newTag": "604f8f8d8a68",
      "banners": 1,
      "updateReloads": 1,
      "cachedFiles": 124,
      "durationMs": 26801,
      "wireBytes": 638444,
      "offline": true,
      "legacyURLs": 21,
      "profile": "lossy",
      "userInitiatedOnly": true,
      "playbackGuard": true,
      "evictionRepair": true,
      "incrementalRefresh": true,
      "offlineTransportErrors": 0
    },
    {
      "browser": "webkit",
      "oldTag": "1175f1a1d2c1",
      "newTag": "604f8f8d8a68",
      "banners": 1,
      "updateReloads": 1,
      "cachedFiles": 124,
      "durationMs": 24322,
      "wireBytes": 743954,
      "offline": true,
      "legacyURLs": 21,
      "profile": "lossy",
      "userInitiatedOnly": true,
      "playbackGuard": true,
      "evictionRepair": true,
      "incrementalRefresh": true,
      "offlineTransportErrors": 4
    }
  ]
 }
--- a/perf/results/hygiene-offline.json
+++ b/perf/results/hygiene-offline.json
--- a/perf/results/hygiene-rollback-offline.json
+++ b/perf/results/hygiene-rollback-offline.json
--- a/perf/results/integration-autosave.json
+++ b/perf/results/integration-autosave.json
@@ -0,0 +1,208 @@
 {
  "revision": "/home/josh/development/personal/ytplayer-codex/wt-integrate/frontend",
  "browsers": {
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      {
        "scenario": "open-default",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "open-audio-only",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-prefer-stream",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-add",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-add-setting-off",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-existing-add",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-boot",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "playlist-boot-off",
        "supported": true,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "pinned-boot",
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        "saved": true,
        "bytes": 30290,
        "calls": 0,
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      },
      {
        "scenario": "settings-enable",
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        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": []
      },
      {
        "scenario": "settings-save-first",
        "supported": true,
        "saved": true,
        "bytes": 30290,
        "calls": 1,
        "errors": [
          "Cannot read properties of null (reading 'addEventListener')"
        ]
      }
    ],
    "webkit": [
      {
        "scenario": "open-default",
        "supported": false,
        "saved": false,
        "bytes": 0,
        "calls": 0,
        "errors": []
      },
      {
        "scenario": "open-save-first",
        "supported": false,
        "saved": false,
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        "errors": []
      },
      {
        "scenario": "open-audio-only",
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        "calls": 0,
        "errors": []
      },
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        "scenario": "open-prefer-stream",
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        "saved": false,
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        "errors": []
      },
      {
        "scenario": "playlist-add",
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        "saved": false,
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        "calls": 1,
        "errors": []
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      {
        "scenario": "playlist-add-setting-off",
        "supported": false,
        "saved": false,
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        "calls": 1,
        "errors": []
      },
      {
        "scenario": "playlist-existing-add",
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        "calls": 1,
        "errors": []
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      {
        "scenario": "playlist-boot",
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      {
        "scenario": "playlist-boot-off",
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        "scenario": "pinned-boot",
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      {
        "scenario": "settings-enable",
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      {
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    ]
  },
  "failures": [],
  "unsupported": [
    "webkit"
  ],
  "buildTag": "7760d5727244"
 }
--- a/perf/results/integration-baseline.json
+++ b/perf/results/integration-baseline.json
--- a/perf/results/integration-lazy.json
+++ b/perf/results/integration-lazy.json
@@ -0,0 +1,97 @@
 {
  "results": [
    {
      "browser": "chromium",
      "sourceBuildTag": "7760d5727244",
      "classicSharedDefaults": true,
      "cssOrderPreserved": true,
      "settingsSearch": true,
      "carControls": 4,
      "offlineFeature": true,
      "firstUseNetwork": 0,
      "layoutsOffline": [
        "glass-stage",
        "bento-hub",
        "f7-swipe",
        "classic"
      ],
      "pinned": true,
      "compatibleUnexecutedNewURL": true,
      "incompatibleN1ReloadRequired": true,
      "stagedN1": true,
      "appEvictionN1Offline": true,
      "playbackGuard": true,
      "prePaintLayout": true,
      "offlineSettingsPanels": true,
      "scriptErrors": [],
      "offlineTransportErrors": []
    },
    {
      "browser": "webkit",
      "sourceBuildTag": "7760d5727244",
      "classicSharedDefaults": true,
      "cssOrderPreserved": true,
      "settingsSearch": true,
      "carControls": 4,
      "offlineFeature": true,
      "firstUseNetwork": 0,
      "layoutsOffline": [
        "glass-stage",
        "bento-hub",
        "f7-swipe",
        "classic"
      ],
      "pinned": true,
      "compatibleUnexecutedNewURL": true,
      "incompatibleN1ReloadRequired": true,
      "stagedN1": true,
      "appEvictionN1Offline": true,
      "playbackGuard": true,
      "prePaintLayout": true,
      "offlineSettingsPanels": true,
      "scriptErrors": [],
      "offlineTransportErrors": [
        {
          "message": "TypeError: Load failed",
          "disconnected": true
        },
        {
          "message": "/127.0.0.1:39913/api/version.",
          "disconnected": true
        },
        {
          "message": "TypeError: Load failed",
          "disconnected": true
        },
        {
          "message": "/127.0.0.1:39913/api/recommendations?fp=163577c02a53bc40.",
          "disconnected": true
        },
        {
          "message": "TypeError: Load failed",
          "disconnected": true
        },
        {
          "message": "/127.0.0.1:39913/api/version.",
          "disconnected": true
        },
        {
          "message": "TypeError: Load failed",
          "disconnected": true
        },
        {
          "message": "/127.0.0.1:39913/api/recommendations?fp=163577c02a53bc40.",
          "disconnected": true
        },
        {
          "message": "TypeError: Load failed",
          "disconnected": true
        },
        {
          "message": "/127.0.0.1:39913/api/version.",
          "disconnected": true
        }
      ]
    }
  ]
 }
--- a/perf/results/integration-migration-lossy.json
+++ b/perf/results/integration-migration-lossy.json
@@ -0,0 +1,41 @@
 {
  "commit": "b77938a",
  "results": [
    {
      "browser": "chromium",
      "oldTag": "1175f1a1d2c1",
      "newTag": "7760d5727244",
      "banners": 1,
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      "durationMs": 27587,
      "wireBytes": 642140,
      "offline": true,
      "legacyURLs": 21,
      "profile": "lossy",
      "userInitiatedOnly": true,
      "playbackGuard": true,
      "evictionRepair": true,
      "incrementalRefresh": true,
      "offlineTransportErrors": 0
    },
    {
      "browser": "webkit",
      "oldTag": "1175f1a1d2c1",
      "newTag": "7760d5727244",
      "banners": 1,
      "updateReloads": 1,
      "cachedFiles": 132,
      "durationMs": 24285,
      "wireBytes": 748999,
      "offline": true,
      "legacyURLs": 21,
      "profile": "lossy",
      "userInitiatedOnly": true,
      "playbackGuard": true,
      "evictionRepair": true,
      "incrementalRefresh": true,
      "offlineTransportErrors": 4
    }
  ]
 }
--- a/perf/results/integration-migration-unthrottled.json
+++ b/perf/results/integration-migration-unthrottled.json
@@ -0,0 +1,41 @@
 {
  "commit": "b77938a",
  "results": [
    {
      "browser": "chromium",
      "oldTag": "1175f1a1d2c1",
      "newTag": "7760d5727244",
      "banners": 1,
      "updateReloads": 1,
      "cachedFiles": 132,
      "durationMs": 10957,
      "wireBytes": 653223,
      "offline": true,
      "legacyURLs": 21,
      "profile": "unthrottled",
      "userInitiatedOnly": true,
      "playbackGuard": true,
      "evictionRepair": true,
      "incrementalRefresh": true,
      "offlineTransportErrors": 0
    },
    {
      "browser": "webkit",
      "oldTag": "1175f1a1d2c1",
      "newTag": "7760d5727244",
      "banners": 1,
      "updateReloads": 1,
      "cachedFiles": 132,
      "durationMs": 9972,
      "wireBytes": 775494,
      "offline": true,
      "legacyURLs": 21,
      "profile": "unthrottled",
      "userInitiatedOnly": true,
      "playbackGuard": true,
      "evictionRepair": true,
      "incrementalRefresh": true,
      "offlineTransportErrors": 4
    }
  ]
 }
--- a/perf/results/integration-offline.json
+++ b/perf/results/integration-offline.json
--- a/perf/results/integration-settings.json
+++ b/perf/results/integration-settings.json
@@ -0,0 +1,708 @@
 {
  "revision": "6ae81d1024caa42931d47abe820417cf63d0fe17",
  "oldTag": "1175f1a1d2c1",
  "results": [
    {
      "engine": "chromium",
      "errors": [
        "Cannot read properties of null (reading 'addEventListener')",
        "Cannot read properties of null (reading 'addEventListener')"
      ],
      "profileChecks": [
        {
          "stage": "older timestamp ignored",
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          "localSyncedAt": 200,
          "saveBeforePlay": true
        },
        {
          "stage": "older settings with newer timestamp adopted",
          "serverUpdatedAt": 300,
          "localSyncedAt": 200,
          "saveBeforePlay": false
        }
      ],
      "behaviour": [
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          "stage": "old",
          "supported": true,
          "bytes": 30290,
          "cached": true,
          "localPlayback": true
        },
        {
          "stage": "upgraded",
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          "bytes": 30290,
          "cached": true,
          "localPlayback": true
        }
      ],
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        },
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          "equal": true,
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        },
        {
          "key": "audioOnly",
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          "equal": true,
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        },
        {
          "key": "autoPreload",
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          "after": true,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "p2pShare",
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          "after": true,
          "equal": true,
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        },
        {
          "key": "p2pReceive",
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          "after": true,
          "equal": true,
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        },
        {
          "key": "saveBeforePlay",
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          "after": true,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "repeatMode",
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          "after": "all",
          "equal": true,
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        },
        {
          "key": "loopOne",
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          "after": true,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "shuffle",
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          "after": false,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "theme",
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          "equal": true,
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        },
        {
          "key": "fontScale",
          "before": "large",
          "after": "large",
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "levelVolume",
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          "after": false,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "liveAudioIOS",
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          "after": false,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "parallelSaves",
          "before": 2,
          "after": 2,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "density",
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          "after": "compact",
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "perfMode",
          "before": true,
          "after": true,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "reduceMotion",
          "before": true,
          "after": true,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "layout",
          "before": "f7-swipe",
          "after": "f7-swipe",
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "autoBackupEnabled",
          "before": false,
          "after": false,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "autoBackupIntervalDays",
          "before": 7,
          "after": 7,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "serviceVideo",
          "before": false,
          "after": false,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "foldedCards",
          "before": {},
          "after": {},
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "eq",
          "before": {
            "preset": "bass",
            "g": [
              5,
              7,
              5,
              3,
              1,
              0,
              0,
              0,
              0,
              0
            ]
          },
          "after": {
            "preset": "bass",
            "g": [
              5,
              7,
              5,
              3,
              1,
              0,
              0,
              0,
              0,
              0
            ]
          },
          "equal": true,
          "expectedMigration": false
        }
      ],
      "old": {
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        "audioOnly": false,
        "autoPreload": true,
        "p2pShare": true,
        "p2pReceive": true,
        "saveBeforePlay": true,
        "repeatMode": "all",
        "loopOne": true,
        "shuffle": false,
        "theme": "light",
        "fontScale": "large",
        "levelVolume": false,
        "liveAudioIOS": false,
        "parallelSaves": 2,
        "density": "compact",
        "perfMode": true,
        "reduceMotion": true,
        "layout": "f7-swipe",
        "autoBackupEnabled": false,
        "autoBackupIntervalDays": 7,
        "serviceVideo": false,
        "foldedCards": {},
        "eq": {
          "preset": "bass",
          "g": [
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            3,
            1,
            0,
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          ]
        }
      },
      "oldUI": {
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        "setAutoPreload": true,
        "setAudioOnly": false,
        "setQuality": "360p",
        "setRepeat": true,
        "setLoopOne": true,
        "setTheme": "light",
        "setFont": "large",
        "setDensity": "compact",
        "setPerf": true,
        "setMotion": true,
        "setParallelSaves": "2",
        "setLevelVolume": false,
        "setLayout": "f7-swipe"
      },
      "oldRaw": "{\"playlists\":[],\"history\":[],\"queue\":[],\"customVideos\":[],\"pinnedPlaylists\":[],\"settings\":{\"quality\":\"360p\",\"volume\":1,\"audioOnly\":false,\"autoPreload\":true,\"p2pShare\":true,\"p2pReceive\":true,\"saveBeforePlay\":true,\"repeatMode\":\"all\",\"loopOne\":true,\"shuffle\":false,\"theme\":\"light\",\"fontScale\":\"large\",\"levelVolume\":false,\"liveAudioIOS\":false,\"parallelSaves\":2,\"density\":\"compact\",\"perfMode\":true,\"reduceMotion\":true,\"layout\":\"f7-swipe\",\"autoBackupEnabled\":false,\"autoBackupIntervalDays\":7,\"serviceVideo\":false,\"foldedCards\":{},\"eq\":{\"preset\":\"bass\",\"g\":[5,7,5,3,1,0,0,0,0,0]}},\"resumePositions\":{},\"rememberPos\":{},\"playCount\":{},\"abMarkers\":{},\"bookmarks\":{},\"lyricOffsets\":{},\"stats\":null,\"lastAutoBackup\":0,\"profile\":null}",
      "newTag": "7760d5727244",
      "upgraded": {
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        "audioOnly": false,
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        "p2pShare": true,
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        "theme": "light",
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        "levelVolume": false,
        "liveAudioIOS": false,
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        "density": "compact",
        "perfMode": true,
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        "layout": "f7-swipe",
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      "newRaw": "{\"playlists\":[],\"history\":[{\"id\":\"benchmedia01\",\"title\":\"Persisted settings local clip\",\"channel\":\"Settings probe\",\"channelId\":\"\",\"channelUrl\":\"\",\"duration\":3,\"thumbnail\":\"\"}],\"queue\":[],\"customVideos\":[],\"pinnedPlaylists\":[],\"resumePositions\":{},\"rememberPos\":{},\"playCount\":{\"benchmedia01\":1},\"abMarkers\":{},\"bookmarks\":{},\"lyricOffsets\":{},\"stats\":null,\"lastAutoBackup\":0,\"settings\":{\"quality\":\"360p\",\"volume\":1,\"audioOnly\":false,\"autoPreload\":true,\"p2pShare\":true,\"p2pReceive\":true,\"saveBeforePlay\":true,\"repeatMode\":\"all\",\"loopOne\":true,\"shuffle\":false,\"theme\":\"light\",\"fontScale\":\"large\",\"levelVolume\":false,\"liveAudioIOS\":false,\"parallelSaves\":2,\"density\":\"compact\",\"perfMode\":true,\"reduceMotion\":true,\"layout\":\"f7-swipe\",\"autoBackupEnabled\":false,\"autoBackupIntervalDays\":7,\"serviceVideo\":false,\"foldedCards\":{},\"eq\":{\"preset\":\"bass\",\"g\":[5,7,5,3,1,0,0,0,0,0]}},\"profile\":null}",
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        "setQuality": "360p",
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        "setLoopOne": true,
        "setTheme": "light",
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        "setDensity": "compact",
        "setPerf": true,
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        "setParallelSaves": "2",
        "setLevelVolume": false,
        "setLayout": "f7-swipe"
      },
      "importPreserved": true,
      "userDataGets": 0
    },
    {
      "engine": "webkit",
      "errors": [],
      "profileChecks": [
        {
          "stage": "older timestamp ignored",
          "serverUpdatedAt": 100,
          "localSyncedAt": 200,
          "saveBeforePlay": true
        },
        {
          "stage": "older settings with newer timestamp adopted",
          "serverUpdatedAt": 300,
          "localSyncedAt": 200,
          "saveBeforePlay": false
        }
      ],
      "behaviour": [
        {
          "stage": "old",
          "supported": false,
          "note": "Native OPFS unavailable; no shim"
        },
        {
          "stage": "upgraded",
          "supported": false,
          "note": "Native OPFS unavailable; no shim"
        }
      ],
      "diff": [
        {
          "key": "quality",
          "before": "360p",
          "after": "360p",
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "volume",
          "before": 1,
          "after": 1,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "audioOnly",
          "before": false,
          "after": false,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "autoPreload",
          "before": true,
          "after": true,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "p2pShare",
          "before": true,
          "after": true,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "p2pReceive",
          "before": true,
          "after": true,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "saveBeforePlay",
          "before": true,
          "after": true,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "repeatMode",
          "before": "all",
          "after": "all",
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "loopOne",
          "before": true,
          "after": true,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "shuffle",
          "before": false,
          "after": false,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "theme",
          "before": "light",
          "after": "light",
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "fontScale",
          "before": "large",
          "after": "large",
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "levelVolume",
          "before": false,
          "after": false,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "liveAudioIOS",
          "before": false,
          "after": false,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "parallelSaves",
          "before": 2,
          "after": 2,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "density",
          "before": "compact",
          "after": "compact",
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "perfMode",
          "before": true,
          "after": true,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "reduceMotion",
          "before": true,
          "after": true,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "layout",
          "before": "f7-swipe",
          "after": "f7-swipe",
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "autoBackupEnabled",
          "before": false,
          "after": false,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "autoBackupIntervalDays",
          "before": 7,
          "after": 7,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "serviceVideo",
          "before": false,
          "after": false,
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "foldedCards",
          "before": {},
          "after": {},
          "equal": true,
          "expectedMigration": false
        },
        {
          "key": "eq",
          "before": {
            "preset": "bass",
            "g": [
              5,
              7,
              5,
              3,
              1,
              0,
              0,
              0,
              0,
              0
            ]
          },
          "after": {
            "preset": "bass",
            "g": [
              5,
              7,
              5,
              3,
              1,
              0,
              0,
              0,
              0,
              0
            ]
          },
          "equal": true,
          "expectedMigration": false
        }
      ],
      "old": {
        "quality": "360p",
        "volume": 1,
        "audioOnly": false,
        "autoPreload": true,
        "p2pShare": true,
        "p2pReceive": true,
        "saveBeforePlay": true,
        "repeatMode": "all",
        "loopOne": true,
        "shuffle": false,
        "theme": "light",
        "fontScale": "large",
        "levelVolume": false,
        "liveAudioIOS": false,
        "parallelSaves": 2,
        "density": "compact",
        "perfMode": true,
        "reduceMotion": true,
        "layout": "f7-swipe",
        "autoBackupEnabled": false,
        "autoBackupIntervalDays": 7,
        "serviceVideo": false,
        "foldedCards": {},
        "eq": {
          "preset": "bass",
          "g": [
            5,
            7,
            5,
            3,
            1,
            0,
            0,
            0,
            0,
            0
          ]
        }
      },
      "oldUI": {
        "setSaveBeforePlay": true,
        "setAutoPreload": true,
        "setAudioOnly": false,
        "setQuality": "360p",
        "setRepeat": true,
        "setLoopOne": true,
        "setTheme": "light",
        "setFont": "large",
        "setDensity": "compact",
        "setPerf": true,
        "setMotion": true,
        "setParallelSaves": "2",
        "setLevelVolume": false,
        "setLayout": "f7-swipe"
      },
      "oldRaw": "{\"playlists\":[],\"history\":[],\"queue\":[],\"customVideos\":[],\"pinnedPlaylists\":[],\"settings\":{\"quality\":\"360p\",\"volume\":1,\"audioOnly\":false,\"autoPreload\":true,\"p2pShare\":true,\"p2pReceive\":true,\"saveBeforePlay\":true,\"repeatMode\":\"all\",\"loopOne\":true,\"shuffle\":false,\"theme\":\"light\",\"fontScale\":\"large\",\"levelVolume\":false,\"liveAudioIOS\":false,\"parallelSaves\":2,\"density\":\"compact\",\"perfMode\":true,\"reduceMotion\":true,\"layout\":\"f7-swipe\",\"autoBackupEnabled\":false,\"autoBackupIntervalDays\":7,\"serviceVideo\":false,\"foldedCards\":{},\"eq\":{\"preset\":\"bass\",\"g\":[5,7,5,3,1,0,0,0,0,0]}},\"resumePositions\":{},\"rememberPos\":{},\"playCount\":{},\"abMarkers\":{},\"bookmarks\":{},\"lyricOffsets\":{},\"stats\":null,\"lastAutoBackup\":0,\"profile\":null}",
      "newTag": "7760d5727244",
      "upgraded": {
        "quality": "360p",
        "volume": 1,
        "audioOnly": false,
        "autoPreload": true,
        "p2pShare": true,
        "p2pReceive": true,
        "saveBeforePlay": true,
        "repeatMode": "all",
        "loopOne": true,
        "shuffle": false,
        "theme": "light",
        "fontScale": "large",
        "levelVolume": false,
        "liveAudioIOS": false,
        "parallelSaves": 2,
        "density": "compact",
        "perfMode": true,
        "reduceMotion": true,
        "layout": "f7-swipe",
        "autoBackupEnabled": false,
        "autoBackupIntervalDays": 7,
        "serviceVideo": false,
        "foldedCards": {},
        "eq": {
          "preset": "bass",
          "g": [
            5,
            7,
            5,
            3,
            1,
            0,
            0,
            0,
            0,
            0
          ]
        }
      },
      "newRaw": "{\"playlists\":[],\"history\":[],\"queue\":[],\"customVideos\":[],\"pinnedPlaylists\":[],\"settings\":{\"quality\":\"360p\",\"volume\":1,\"audioOnly\":false,\"autoPreload\":true,\"p2pShare\":true,\"p2pReceive\":true,\"saveBeforePlay\":true,\"repeatMode\":\"all\",\"loopOne\":true,\"shuffle\":false,\"theme\":\"light\",\"fontScale\":\"large\",\"levelVolume\":false,\"liveAudioIOS\":false,\"parallelSaves\":2,\"density\":\"compact\",\"perfMode\":true,\"reduceMotion\":true,\"layout\":\"f7-swipe\",\"autoBackupEnabled\":false,\"autoBackupIntervalDays\":7,\"serviceVideo\":false,\"foldedCards\":{},\"eq\":{\"preset\":\"bass\",\"g\":[5,7,5,3,1,0,0,0,0,0]}},\"resumePositions\":{},\"rememberPos\":{},\"playCount\":{},\"abMarkers\":{},\"bookmarks\":{},\"lyricOffsets\":{},\"stats\":null,\"lastAutoBackup\":0,\"profile\":null}",
      "newUI": {
        "setSaveBeforePlay": true,
        "setAutoPreload": true,
        "setAudioOnly": false,
        "setQuality": "360p",
        "setRepeat": true,
        "setLoopOne": true,
        "setTheme": "light",
        "setFont": "large",
        "setDensity": "compact",
        "setPerf": true,
        "setMotion": true,
        "setParallelSaves": "2",
        "setLevelVolume": false,
        "setLayout": "f7-swipe"
      },
      "importPreserved": true,
      "userDataGets": 0
    }
  ],
  "failures": [],
  "unsupported": [
    "webkit",
    "webkit"
  ]
 }
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Jonathan Sykes	7f49c317fd	Merge retry hardening with DSP cache opt-in	2026-10-10 23:00:32 +08:00
Jonathan Sykes	f0daeaedd2	Fix responsive DSP settings controls	2026-10-10 22:50:02 +08:00
Jonathan Sykes	0c387a01cd	Record DSP integration verification and optional cache results	2026-10-10 19:42:14 +08:00
Jonathan Sykes	e0802aa8a8	Wait for DSP opt-in persistence in settings harness	2026-10-10 19:32:12 +08:00
Jonathan Sykes	865c60cb85	Fix offline opt-in persistence assertion	2026-10-10 19:29:31 +08:00
Jonathan Sykes	ef12468a99	Extend JamesDSP with convolution and spatial audio	2026-10-10 19:25:06 +08:00
Jonathan Sykes	b3f0525a8e	Stage legacy asset migration before activation	2026-10-10 18:40:32 +08:00
Jonathan Sykes	d02796b0eb	Retry transient foreground requests before surfacing errors	2026-10-09 21:53:03 +08:00
Jonathan Sykes	7591c2d14c	Record JamesDSP integration verification results	2026-10-09 21:08:58 +08:00
Jonathan Sykes	6bb3271431	Add JamesDSP playback controls and verification harness	2026-10-09 20:29:37 +08:00
Jonathan Sykes	27b32ff0c9	Add the guarded JamesDSP audio controller	2026-10-09 20:00:49 +08:00
Jonathan Sykes	aca50c1690	Vendor JamesDSP in a lazy asset group	2026-10-09 19:52:17 +08:00
Jonathan Sykes	76037613a7	Extract the shared realtime audio graph owner	2026-10-09 19:46:00 +08:00
Jonathan Sykes	d6a3570ff9	Document JamesDSP audio ownership audit	2026-10-09 19:42:11 +08:00
Jonathan Sykes	933e920701	Add JamesDSP integration plan	2026-10-09 18:30:26 +08:00
Jonathan Sykes	a1048f1c30	Verify transport geometry, playback states and themed icons across both engines	2026-10-09 16:12:28 +08:00
Jonathan Sykes	1e83951972	Reconcile transport drawing variants, admin controls and theme cascades	2026-10-09 16:10:02 +08:00
Jonathan Sykes	9a37715da4	Unify transport controls with themed SVG symbols and accessible playback states	2026-10-09 15:54:22 +08:00
Jonathan Sykes	0a5b113ebe	Record combined migration, offline and cold-start verification	2026-10-09 15:47:35 +08:00
Jonathan Sykes	6ae81d1024	Merge autosave probes and reconcile the complete verification guide	2026-10-09 15:12:55 +08:00
Jonathan Sykes	52e51278d5	Merge persisted-settings verification and retain all harness documentation	2026-10-09 15:12:46 +08:00
Jonathan Sykes	d027696d4e	Merge manifest hygiene and reconcile runtime exclusions with CSP response capture	2026-10-09 15:12:39 +08:00
Jonathan Sykes	4ba5130c80	Merge Phase 6 and reconcile offline completion, response capture and contract tests	2026-10-09 15:12:14 +08:00
Jonathan Sykes	ea221a4e90	Verify persisted settings and save-before-play through production updates	2026-10-09 15:09:09 +08:00
Jonathan Sykes	8a4144eb00	Document runtime exclusions and verify offline transfer savings	2026-10-09 14:56:31 +08:00
Jonathan Sykes	dd09f66578	Separate runtime manifest inputs from directly served files	2026-10-09 14:40:46 +08:00
Jonathan Sykes	cf27d4f15a	Merge branch 'codex/ui-fixes'	2026-10-09 14:37:51 +08:00
Jonathan Sykes	9c988912de	Complete phase 6 report with post-crash checks	2026-10-09 14:35:51 +08:00
Jonathan Sykes	6f0235f506	Record post-crash phase 6 verification	2026-10-09 14:34:59 +08:00
Jonathan Sykes	a497180352	Verify mobile geometry and themed media icons across browsers	2026-10-09 14:32:17 +08:00
Jonathan Sykes	2001e77cee	Use theme-aware SVGs for download and offline actions	2026-10-09 14:28:42 +08:00
Jonathan Sykes	f161a5de74	Record autosave comparison results and native storage limits	2026-10-09 14:25:43 +08:00
Jonathan Sykes	0b8e398469	Record offline completeness and recovery verification	2026-10-09 10:59:50 +08:00
Jonathan Sykes	2fc6d5d4dc	Release response streams used by cache metadata probes	2026-10-09 10:43:05 +08:00
Jonathan Sykes	f359e5dd39	Limit activation readiness checks to blocking assets	2026-10-09 10:34:57 +08:00
Jonathan Sykes	2c8d563d01	Keep offline completion outside the activation barrier	2026-10-09 10:28:11 +08:00
Jonathan Sykes	6b8d590638	Verify worker recovery and retained offline feature fallback	2026-10-09 09:54:30 +08:00
Jonathan Sykes	009a155568	Resume offline preparation on launch and show cache readiness	2026-10-09 09:33:57 +08:00
Jonathan Sykes	0251720fa2	Complete verified offline assets in a resumable worker job	2026-10-09 09:32:08 +08:00
Jonathan Sykes	97f4a7396e	Exercise offline editors and interrupted worker recovery	2026-10-09 09:24:20 +08:00
Jonathan Sykes	b59fc7264a	Verify device autosave behavior across frontend revisions	2026-10-09 09:16:58 +08:00
Jonathan Sykes	14716e648b	Add offline completeness and feature regression harness	2026-10-09 09:15:29 +08:00
Jonathan Sykes	71608c2ce8	Clarify the diagnostic waterfall source	2026-10-09 09:11:45 +08:00
Jonathan Sykes	66bbda51c7	Keep saved thumbnails inside their grid column	2026-10-09 09:11:30 +08:00
Jonathan Sykes	ff3f934717	Record phase 6 measurements and compatibility verification	2026-10-08 12:06:13 +08:00
Jonathan Sykes	3de4cba402	Align toolbar controls and provide full touch targets	2026-10-08 12:04:56 +08:00
Jonathan Sykes	4b1f5204f8	Restore native boot scheduling without an extra core request	2026-10-08 11:25:03 +08:00
Jonathan Sykes	9408ee07e5	Limit the WebKit response handoff to uncontrolled visits	2026-10-08 10:08:35 +08:00
Jonathan Sykes	97eb31e732	Enforce stale core contracts in the worker without native startup I/O	2026-10-08 10:05:38 +08:00
Jonathan Sykes	57edb410c3	Keep native Chromium loading and prevent stale browser cache entries	2026-10-08 09:43:51 +08:00
Jonathan Sykes	c4a512bea6	Guard stale app execution against feature contract changes	2026-10-08 09:18:51 +08:00
Jonathan Sykes	3505dc3c0e	Preserve verified N-1 app boot after a cache entry is lost	2026-10-08 09:10:28 +08:00
Jonathan Sykes	639f0a2257	Record cache reuse probes and reset each benchmark configuration	2026-10-08 09:06:40 +08:00
Jonathan Sykes	a86fa1cebe	Cache the page-owned app response before starting the worker	2026-10-08 09:04:20 +08:00
Jonathan Sykes	e7a7cdc6b9	Preload classic layout CSS before the blocking head loader	2026-10-08 08:50:51 +08:00
Jonathan Sykes	799b1e7ed6	Trace cold request waterfalls and isolate the layout discovery regression	2026-10-08 08:45:00 +08:00
Jonathan Sykes	af6aabc3b7	Plan phase 6: diagnose and fix WebKit cold delivery	2026-10-08 08:27:08 +08:00
Jonathan Sykes	21c12733d3	Record final performance sweep and staged rollout instructions	2026-10-08 05:47:31 +08:00
Jonathan Sykes	a08d363f2d	Measure complete CSS updates and fully cached warm reloads	2026-10-08 05:12:32 +08:00
Jonathan Sykes	ce5a159d4a	Plan phase 5: measure final performance and document rollout	2026-10-08 05:09:07 +08:00