feat: Search results page, gapless removal, UI polish (v1.0.11)

- Add full search results page (/search?q=) with artist, album, song sections
- Fix search results column alignment (fixed-width Format column eliminates per-grid auto-sizing variance)
- Remove experimental gapless playback (caused song skipping and beginning cutoffs)
- Add known limitations to README and CHANGELOG (seeking, DnD reliability)
- Update GitHub Actions to Node.js 24 (checkout@v5, setup-node@v5)
- Add align-items: center to tracklist-header CSS

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/i18n.ts

@@ -44,6 +44,9 @@ const enTranslation = {
     albums: 'Albums',
     songs: 'Songs',
     clearLabel: 'Clear search',
+    title: 'Search',
+    resultsFor: 'Results for "{{query}}"',
+    album: 'Album',
   },
   nowPlaying: {
     tooltip: 'Who is listening?',
@@ -402,6 +405,9 @@ const deTranslation = {
     albums: 'Alben',
     songs: 'Songs',
     clearLabel: 'Suche leeren',
+    title: 'Suche',
+    resultsFor: 'Ergebnisse für „{{query}}"',
+    album: 'Album',
   },
   nowPlaying: {
     tooltip: 'Wer hört was?',