feat(now-playing): redesign page as info dashboard (#266)

Replace the flat Now Playing page with a two-column dashboard: hero
(cover, metadata, badges, Last.fm stats + love button, release-age
tagline), and a grid of themed cards (Album tracklist with sliding
window, most-played-by-artist, credits, about-the-artist with Last.fm
bio fallback, compact discography contact-sheet with expand, upcoming
tours via Bandsintown). Adds lastfmGetTrackInfo + lastfmGetArtistStats
for global listener counts + userplaycount, plus Last.fm love/unlove
wired to the new hero button. Module-level TTL caches per entity keep
same-artist track switches instant. Artist-image guard filters the
well-known Last.fm no-image placeholder so the card collapses cleanly
when no real image exists.

Co-authored-by: Psychotoxical <dev@psysonic.app>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/locales/en.ts

@@ -94,6 +94,30 @@ export const enTranslation = {
     showLess: 'Show less',
     genreInfo: 'Genre',
     trackInfo: 'Track Info',
+    topSongs: 'Most played by this artist',
+    topSongsCredit: 'Top tracks from {{name}}',
+    trackPosition: 'Track {{pos}}',
+    playsCount_one: '{{count}} play',
+    playsCount_other: '{{count}} plays',
+    releasedYearsAgo_one: '{{count}} year ago',
+    releasedYearsAgo_other: '{{count}} years ago',
+    discography: 'Discography',
+    lastfmStats: 'Last.fm stats',
+    thisTrack: 'This track',
+    thisArtist: 'This artist',
+    listeners: 'listeners',
+    scrobbles: 'scrobbles',
+    yourScrobbles: 'by you',
+    listenersN: '{{n}} listeners',
+    scrobblesN: '{{n}} scrobbles',
+    playsByYouN: 'played {{n}}× by you',
+    openTrackOnLastfm: 'Track on Last.fm',
+    openArtistOnLastfm: 'Artist on Last.fm',
+    rgTrackTooltip: 'ReplayGain (track)',
+    rgAlbumTooltip: 'ReplayGain (album)',
+    rgAutoTooltip: 'ReplayGain (auto)',
+    showMoreTracks: 'Show {{count}} more',
+    showLessTracks: 'Show less',
   },
   contextMenu: {
     playNow: 'Play Now',