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/(tabs)/search.tsx

@@ -9,13 +9,14 @@ import { FlatList, Pressable, Text, TextInput, View } from 'react-native';
 import { useSession } from '../../lib/session';
 import { player } from '../../player/controller';
 import { usePlayerState } from '../../player/hooks';
-import { colors, radius } from '../../theme';
+import { radius, useColors } from '../../theme';
 import { Cover, Icon, Screen, TrackRow, useErrorText } from '../../ui/kit';
 
 const RECENT_KEY = 'pipu.recent_searches';
 
 /** Поиск: подсказки по мере ввода (debounce 250 мс), недавние запросы — локально. */
 export default function SearchScreen() {
+  const colors = useColors();
   const { t } = useTranslation();
   const session = useSession();
   const router = useRouter();