Switch to forked better_native_video_player that uses preferredPeakBitRate
instead of replaceCurrentItem for seamless quality transitions without
black flash. Fork also adds configureForLivePlayback and getLatencyToLive
APIs for low-latency tuning and HLS program date-time based latency.
Add latency polling (10s interval) with auto-sync chat delay support.
Only update syncedChatDelay on >2s drift to avoid restarting countdown.
Add cookie extraction from WKWebView login session for ad-free GQL
playback. The auth-token cookie works with the web Client-ID per
Streamlink's approach. Extract at login, persist to secure storage,
and attempt fresh extraction on init for existing logged-in users.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
