Resume offline preparation on launch and show cache readiness

frontend/views-core.js

@@ -843,6 +843,7 @@ 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
@@ -1186,6 +1187,8 @@ 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();