Jannis Braun
cd48261f54
feat: Voice UI overhaul — fix black tiles, focus mode, track lifecycle
- Fix black screen when streams end by checking track readyState === 'live'
- Add track 'ended' event listeners in VoiceUser for immediate fallback to avatar
- Add visible "Grid" button to exit focus mode (replaces undiscoverable double-click)
- Auto-focus screen sharers, auto-unfocus when they stop sharing
- Add LIVE badge, speaking glow shadow, screen share object-contain
- Add TrackMuted/TrackUnmuted/ActiveSpeakersChanged Room events
- Fix PiP video attachment with shouldShow dependency