Redesign landing page: hero with gradient brand wordmark, value pills (no ads / no sign-in / offline playlists), and clickable quick-search chips; refresh Windows installers

frontend/app.js

@@ -942,6 +942,14 @@ function wireUI() {
 
   els.newPlaylistBtn.addEventListener('click', () => newPlaylist(null));
 
+  // Landing-hero quick-search chips
+  document.querySelectorAll('.chip').forEach((c) => {
+    c.addEventListener('click', () => {
+      els.searchInput.value = c.dataset.q || c.textContent.trim();
+      els.searchForm.requestSubmit();
+    });
+  });
+
   // Now-playing: Save (preload) + Add to playlist
   els.saveBtn.addEventListener('click', async () => {
     if (!current || !current.meta) return;