fix(mobile): resync TTS after foreground restore

[codedogQBY]

Analysis

• [Bug] 语音朗读与文本不同步问题 #403 reports mobile TTS/text synchronization drifting out of sync.
• [Bug] 听小说时页面显示会暂停 #212 reports the same state mismatch from the UI side: audio keeps playing while the page shows paused, and returning to the listening/reader view can no longer locate the scrolling text.
• Android can keep React Native TrackPlayer audio moving while React effects and JS timers are paused in the background.
• The reader foreground resync used a CFI captured before native playback position was polled again, so it could jump/highlight stale text when the app returned.
• Background notification controls also bypassed the TTS store in PlaybackService, which could leave store state behind native playback.

Changes

• Sync Edge and DashScope TrackPlayer players from the native active track when the app returns to the foreground, then restart progress polling from that position.
• Resolve the reader foreground highlight/jump target after the WebView resumes from the latest TTS store state and segment refs.
• Route PlaybackService remote controls through the TTS store while keeping direct TrackPlayer calls as a native fallback.

Verification

• pnpm exec biome check packages/app-expo/src/lib/platform/track-player-edge-player.ts packages/app-expo/src/lib/platform/track-player-dashscope-player.ts packages/app-expo/src/screens/reader/useReaderTTS.ts packages/app-expo/src/services/PlaybackService.ts
• pnpm --filter @readany/app-expo exec tsc --noEmit
• git diff --check

Fixes #403
Fixes #212