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/i18n.ts

@@ -127,6 +127,7 @@ const enTranslation = {
     artists: 'Artists',
     albums: 'Albums',
     songs: 'Songs',
+    enqueueAll: 'Add all to queue',
   },
   randomAlbums: {
     title: 'Random Albums',
@@ -169,6 +170,11 @@ const enTranslation = {
     minutes: 'min.',
     track_one: '{{count}} Track',
     track_other: '{{count}} Tracks',
+    filterPlaceholder: 'Filter playlists…',
+    colName: 'Name',
+    colTracks: 'Tracks',
+    colDuration: 'Duration',
+    noResults: 'No playlists match your filter.',
   },
   albums: {
     title: 'All Albums',
@@ -371,10 +377,22 @@ const enTranslation = {
   },
   statistics: {
     title: 'Statistics',
+    recentlyPlayed: 'Recently Played',
     mostPlayed: 'Most Played Albums',
     highestRated: 'Highest Rated Albums',
     genreDistribution: 'Genre Distribution (Top 20)',
     loadMore: 'Load more',
+    statArtists: 'Artists',
+    statAlbums: 'Albums',
+    statSongs: 'Songs',
+    statGenres: 'Genres',
+    genreSongs: '{{count}} Songs',
+    genreAlbums: '{{count}} Albums',
+    recentlyAdded: 'Recently Added',
+    decadeDistribution: 'Albums by Decade',
+    decadeAlbums_one: '{{count}} Album',
+    decadeAlbums_other: '{{count}} Albums',
+    decadeUnknown: 'Unknown',
   },
   player: {
     regionLabel: 'Music Player',
@@ -526,6 +544,7 @@ const deTranslation = {
     artists: 'Künstler',
     albums: 'Alben',
     songs: 'Songs',
+    enqueueAll: 'Alle in die Warteschlange',
   },
   randomAlbums: {
     title: 'Zufallsalben',
@@ -568,6 +587,11 @@ const deTranslation = {
     minutes: 'Min.',
     track_one: '{{count}} Track',
     track_other: '{{count}} Tracks',
+    filterPlaceholder: 'Playlists filtern…',
+    colName: 'Name',
+    colTracks: 'Tracks',
+    colDuration: 'Dauer',
+    noResults: 'Keine Playlists entsprechen dem Filter.',
   },
   albums: {
     title: 'Alle Alben',
@@ -762,7 +786,7 @@ const deTranslation = {
     delete: 'Löschen',
     deleteConfirm: 'Playlist "{{name}}" löschen?',
     clear: 'Leeren',
-    shuffle: 'Queue mischen',
+    shuffle: 'Warteschlange mischen',
     hide: 'Verbergen',
     close: 'Schließen',
     nextTracks: 'Nächste Titel',
@@ -770,10 +794,22 @@ const deTranslation = {
   },
   statistics: {
     title: 'Statistiken',
+    recentlyPlayed: 'Zuletzt gehört',
     mostPlayed: 'Meistgespielte Alben',
     highestRated: 'Höchstbewertete Alben',
     genreDistribution: 'Genre-Verteilung (Top 20)',
     loadMore: 'Mehr laden',
+    statArtists: 'Künstler',
+    statAlbums: 'Alben',
+    statSongs: 'Songs',
+    statGenres: 'Genres',
+    genreSongs: '{{count}} Songs',
+    genreAlbums: '{{count}} Alben',
+    recentlyAdded: 'Neu hinzugefügt',
+    decadeDistribution: 'Alben nach Jahrzehnt',
+    decadeAlbums_one: '{{count}} Album',
+    decadeAlbums_other: '{{count}} Alben',
+    decadeUnknown: 'Unbekannt',
   },
   player: {
     regionLabel: 'Musikplayer',