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/QueuePanel.tsx

@@ -286,18 +286,18 @@ export default function QueuePanel() {
             )}
           </div>
           <div className="queue-current-info">
-            <h3
-              className="truncate"
-              data-tooltip={currentTrack.title}
-              style={{ cursor: currentTrack.albumId ? 'pointer' : 'default' }}
-              onClick={() => currentTrack.albumId && navigate(`/album/${currentTrack.albumId}`)}
-            >{currentTrack.title}</h3>
-            {currentTrack.year && <div className="queue-current-sub">{currentTrack.year}</div>}
+            <h3 className="truncate" data-tooltip={currentTrack.title}>{currentTrack.title}</h3>
+            <div
+              className="queue-current-sub truncate"
+              data-tooltip={currentTrack.artist}
+              style={{ cursor: currentTrack.artistId ? 'pointer' : 'default' }}
+              onClick={() => currentTrack.artistId && navigate(`/artist/${currentTrack.artistId}`)}
+            >{currentTrack.artist}</div>
             <div
               className="queue-current-sub truncate"
               data-tooltip={currentTrack.album}
-              style={{ cursor: currentTrack.artistId ? 'pointer' : 'default' }}
-              onClick={() => currentTrack.artistId && navigate(`/artist/${currentTrack.artistId}`)}
+              style={{ cursor: currentTrack.albumId ? 'pointer' : 'default' }}
+              onClick={() => currentTrack.albumId && navigate(`/album/${currentTrack.albumId}`)}
             >{currentTrack.album}</div>
             
             <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginTop: '6px' }}>