feat(tracklist): play count, last played, BPM columns + Song Info rows (#730)

* feat(tracklist): play count, last played, and BPM columns (#516)

Adds three opt-in columns to Album / Playlist / Favorites tracklists,
plus the same fields in the Song Info modal. Picks up Navidrome's
existing `playCount` / `played` / `bpm` from the Subsonic response — no
new API calls.

- `SubsonicSong` gains `playCount`, `played`, `bpm` (already populated
  by Navidrome's Subsonic API, just unmapped in the TS model).
- `albumTrackListHelpers.COLUMNS`, `PL_COLUMNS` (PlaylistDetail), and
  `FAV_COLUMNS` (Favorites) get the three new entries. Genre also added
  to the playlist column set for parity with the other two lists.
- Render uses `.track-duration` (12px tabular, centered, muted) for the
  numeric stats and `.track-genre` (11px text, muted) for the relative
  last-played timestamp via the existing `formatLastSeen` helper.
- Sort logic extended in `playlistDisplayedSongs`,
  `useAlbumDetailSort`, and `useFavoritesSongFiltering` for the three
  new keys.
- `SongInfoModal` gets matching rows (BPM / Play count / Last played).
- `useTracklistColumns.gridTemplate` / `gridMinWidth` fall back to the
  ColDef's `defaultWidth` when a visible column has no saved width
  (newly added column on an old prefs blob would otherwise emit
  `undefinedpx` and collapse the row layout until reset-to-defaults).
- BPM cells skip the rendering when Navidrome returns 0 (default for
  untagged files) — show `—` instead of `0`.
- i18n: `albumDetail.trackPlayCount / trackLastPlayed / trackBpm` and
  `songInfo.playCount / lastPlayed / bpm` in all 9 locales.

Suggested by jbigginswyl (#516).

* docs(changelog): tracklist Plays / Last played / BPM columns (#730)

src/components/SongInfoModal.tsx

@@ -11,6 +11,8 @@ import { useTranslation } from 'react-i18next';
 import { copyTextToClipboard } from '../utils/server/serverMagicString';
 import { showToast } from '../utils/ui/toast';
 import { formatTrackTime } from '../utils/format/formatDuration';
+import { formatLastSeen } from '../utils/componentHelpers/userMgmtHelpers';
+import i18n from '../i18n';
 
 function formatSize(bytes?: number): string | null {
   if (!bytes) return null;
@@ -149,6 +151,9 @@ export default function SongInfoModal() {
                 <Row label={t('songInfo.genre')} value={song.genre} />
                 <Row label={t('songInfo.duration')} value={formatTrackTime(song.duration)} />
                 <Row label={t('songInfo.track')} value={trackLabel} />
+                <Row label={t('songInfo.bpm')} value={song.bpm} />
+                <Row label={t('songInfo.playCount')} value={song.playCount} />
+                <Row label={t('songInfo.lastPlayed')} value={song.played ? formatLastSeen(song.played, i18n.language, '—') : null} />
 
                 <Divider />