feat: statistics upgrade, playlists redesign, artist cards, and UX improvements (v1.4.0)

- Statistics page: library stat cards, recently played, most played, highest rated, genre chart
- Playlists page: list layout with sort (Name/Tracks/Duration) and filter input
- Favorites songs: full tracklist layout with artist column, context menu, enqueue-all button
- AlbumDetail: extracted AlbumHeader and AlbumTrackList components
- Artist cards: square cover, same sizing as album cards (clamp 140-180px)
- Random Albums: removed renderKey remount, added loadingRef guard, fixed manual refresh race
- Context menu: "Go to Album" option for song and queue-item types
- Queue panel meta box: artist → artist page, album → album page, removed year
- Random Mix: hover persistence via .context-active class while context menu is open
- i18n: "Warteschlange" consistently used for queue in German

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

src/components/ArtistRow.tsx

@@ -59,10 +59,10 @@ export default function ArtistRow({ title, artists, moreLink, moreText, onLoadMo
   if (artists.length === 0) return null;
 
   return (
-    <section className="artist-row-section">
-      <div className="artist-row-header">
+    <section className="album-row-section">
+      <div className="album-row-header">
         <h2 className="section-title" style={{ marginBottom: 0 }}>{title}</h2>
-        <div className="artist-row-nav">
+        <div className="album-row-nav">
           <button 
             className={`nav-btn ${!showLeft ? 'disabled' : ''}`} 
             onClick={() => scroll('left')}