feat(mobile): Skia wave, wave player view, themes and playback settings (M5)

- My Wave is rendered with react-native-skia on the UI thread; physics
  and colour helpers moved to @pipu/core (wave-anim) and shared with web.
- Full-screen player honours ui_prefs.mobile_player (cover / wave).
- Theme switching (dark / light / system) via a theme context and
  useColors() across all screens.
- Profile: theme, wave variant, player view, sound quality sheet
  (Wi-Fi / mobile / downloads), recent-tracks cache clearing on next
  cold start, and a change-password sheet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/mobile/src/app/album/[id].tsx

@@ -8,10 +8,11 @@ import { useSession } from '../../lib/session';
 import { downloads } from '../../offline/downloads';
 import { player } from '../../player/controller';
 import { usePlayerState } from '../../player/hooks';
-import { colors } from '../../theme';
+import { useColors } from '../../theme';
 import { Button, Cover, Icon, Screen, TrackRow, formatDuration, useErrorText } from '../../ui/kit';
 
 export default function AlbumScreen() {
+  const colors = useColors();
   const { id } = useLocalSearchParams<{ id: string }>();
   const { t } = useTranslation();
   const router = useRouter();