feat: queue-ux-improvements (#419)

* feat(queue): add ETA display, equalizer indicator and collapsible now playing

* deleted endsAt and showDuration strings, changed eta update to 30s

* feat(queue): ETA tooltip, persistent Now Playing collapse, EQ bar pause, remove redundant Play icon

* feat(queue): fold ETA into existing total/remaining toggle as third mode

The standalone ETA span next to the track counter is removed; instead the
clickable duration label in the queue header now rotates through three
modes per click: total → remaining → eta → total. Counter (N/M) stays
where it was.

ETA mode keeps the live-feel treatment from the original PR (accent
colour while playing, muted at 50% opacity when paused). The other two
modes use plain accent.

i18n: queue.etaTooltip removed (no longer a separate descriptive label),
queue.showEta added as the action tooltip ('Show estimated end time')
in all 8 locales — matches the showRemaining / showTotal pattern.

* docs(changelog): add #419 queue UX improvements entry

Adds the [1.45.0] / Added entry for this PR's queue panel refinements
(position counter, tri-state duration toggle including ETA, collapsible
Now Playing section, animated EQ indicator).

---------

Co-authored-by: Psychotoxical <171614930+Psychotoxical@users.noreply.github.com>

src/components/AlbumTrackList.tsx

@@ -119,7 +119,6 @@ const TrackRow = React.memo(function TrackRow({
   const isActive = currentTrackId === song.id;
   // Primitive selector: row only re-renders when *this song's* preview state flips.
   const isPreviewing = usePreviewStore(s => s.previewingId === song.id);
-  const isPreviewAudioStarted = usePreviewStore(s => s.previewingId === song.id && s.audioStarted);
 
   const renderCell = (colDef: ColDef) => {
     const key = colDef.key as ColKey;
@@ -157,7 +156,7 @@ const TrackRow = React.memo(function TrackRow({
             </button>
             <button
               type="button"
-              className={`playlist-suggestion-preview-btn${isPreviewing ? ' is-previewing' : ''}${isPreviewAudioStarted ? ' audio-started' : ''}`}
+              className={`playlist-suggestion-preview-btn${isPreviewing ? ' is-previewing' : ''}`}
               onClick={e => {
                 e.stopPropagation();
                 usePreviewStore.getState().startPreview({ id: song.id, title: song.title, artist: song.artist, coverArt: song.coverArt, duration: song.duration }, 'albums');