Add sleep timer to player bar (#1671)

* feat: add sleep timer to player bar

- Add sleep timer button in player bar right controls
- Preset options: End of song, 5/10/15/30/45 min, 1 hr, 2 hrs
- Custom timer with HH:MM:SS input fields
- Timer only counts down while music is playing
- Timer pauses playback when it expires
- End-of-song mode pauses at the next track change
- Uses theme-aware styling (--theme-colors-surface)
- Add sleepTimer/sleepTimerOff icons (LuTimer/LuTimerOff)
- Add i18n strings for sleep timer UI

---------

Co-authored-by: York <york@BonecharMac.local>
Co-authored-by: jeffvli <jeffvictorli@gmail.com>

src/renderer/features/player/components/audio-players.tsx

@@ -7,6 +7,7 @@ import { DiscordRpcHook } from '/@/renderer/features/discord-rpc/use-discord-rpc
 import { MainPlayerListenerHook } from '/@/renderer/features/player/audio-player/hooks/use-main-player-listener';
 import { MpvPlayer } from '/@/renderer/features/player/audio-player/mpv-player';
 import { WebPlayer } from '/@/renderer/features/player/audio-player/web-player';
+import { SleepTimerHook } from '/@/renderer/features/player/components/sleep-timer-button';
 import { AutoDJHook } from '/@/renderer/features/player/hooks/use-auto-dj';
 import { MediaSessionHook } from '/@/renderer/features/player/hooks/use-media-session';
 import { MPRISHook } from '/@/renderer/features/player/hooks/use-mpris';
@@ -48,6 +49,7 @@ export const AudioPlayers = () => {
 
     return (
         <>
+            <SleepTimerHook />
             <ScrobbleHook />
             <PowerSaveBlockerHook />
             <DiscordRpcHook />