feat: 2026-08 upstream merge sync — 53 commits (Batches A–C, D PR#1, TTS issue #19) - #20

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v4, actions/checkout@v4, actions/setup-node@v4, pnpm/action-setup@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

React Hook useCallback has missing dependencies: 'adjustHighlightOffset' and 'paragraphHighlightOffsetRef'. Either include them or remove the dependency array

React Hook useEffect has a missing dependency: 'webViewRef'. Either include it or remove the dependency array

React Hook useEffect has a missing dependency: 'webViewRef'. Either include it or remove the dependency array

React Hook useMemo has missing dependencies: 'disableHapticFeedback' and 'paragraphHighlightOffsetRef'. Either include them or remove the dependency array

React Hook useEffect has a missing dependency: 'chapter.name'. Either include it or remove the dependency array

Inline style: { left: 'I18nManager.isRTL ? 0 : afterHandleStart' }