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

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

src/renderer/features/player/components/right-controls.tsx

@@ -5,6 +5,7 @@ import { useTranslation } from 'react-i18next';
 import { PopoverPlayQueue } from '/@/renderer/features/now-playing/components/popover-play-queue';
 import { PlayerConfig } from '/@/renderer/features/player/components/player-config';
 import { CustomPlayerbarSlider } from '/@/renderer/features/player/components/playerbar-slider';
+import { SleepTimerButton } from '/@/renderer/features/player/components/sleep-timer-button';
 import { usePlayer } from '/@/renderer/features/player/context/player-context';
 import { useSetRating } from '/@/renderer/features/shared/hooks/use-set-rating';
 import { useCreateFavorite } from '/@/renderer/features/shared/mutations/create-favorite-mutation';
@@ -72,6 +73,7 @@ export const RightControls = () => {
                 <AutoDJButton />
             </Group>
             <Group align="center" gap="xs" wrap="nowrap">
+                <SleepTimerButton />
                 <PlayerConfig />
                 <LyricsButton />
                 <FavoriteButton />