feat(settings): player bar layout — per-control visibility toggles (#627) (#721)

Adds a new sub-section under Settings → Personalisation (Advanced) that
hides individual controls in the player bar: Star rating, Favorite
(heart), Last.fm love, Equalizer, Mini player. Last.fm love still only
renders when a Last.fm session exists; the overflow row in the player
collapses when both Equalizer and Mini player are hidden.

- New `playerBarLayoutStore` (Zustand + persist, items[{id, visible}] +
  rehydrate sanitize) following the queueToolbar / playlistLayout
  pattern; defaults to all visible.
- New `PlayerBarLayoutCustomizer` reuses the same row + toggle pattern
  as the other personalisation customisers.
- Gates threaded through `PlayerTrackInfo` (3 controls), `PlayerBar`
  (EQ + Mini buttons), and `PlayerOverflowMenu` (EQ + Mini in the
  overflow row, with row-level conditional).
- `PersonalisationTab`: added as the last advanced sub-section so it
  only appears when the global Advanced Mode toggle is on.
- Settings search index gets entries for both Playlist page layout and
  Player bar (playlist row was missing).
- New i18n keys `settings.playerBar*` in all 9 locales.

Reuses kveld9's design from PR #627; not merged because the locale
split and the Advanced Mode refactor landed afterwards. Credited via
Co-Authored-By trailer + a new line in settingsCredits.ts under the
existing kveld9 entry.

Co-authored-by: Kveld. <kveld912@proton.me>

src/locales/zh/settings.ts

@@ -271,6 +271,13 @@ export const settings = {
   playlistLayoutTitle: '播放列表页面布局',
   playlistLayoutDesc: '在播放列表页面上显示或隐藏各个元素。',
   playlistLayoutReset: '重置为默认',
+  playerBarTitle: '播放器栏',
+  playerBarReset: '重置为默认',
+  playerBarStarRating: '星级评分',
+  playerBarFavorite: '收藏（心形）',
+  playerBarLastfmLove: 'Last.fm 喜欢',
+  playerBarEqualizer: '均衡器',
+  playerBarMiniPlayer: '迷你播放器',
   advancedMode: '高级',
   advancedModeTooltip: '在所有设置选项卡中显示高级选项。由社区贡献，未必体现 Psysonic 维护者的设计理念。',
   advancedBadge: '高级',