Discord-style bottom drawer for voice instead of navigating away:
- "Join Voice" hides the FAB, slides up a persistent bottom bar
- Drawer shows: room name, timer, P2P/Relay badge, level meter
- Controls: mic, speaker, end call — all in the drawer
- Direct call info (identicon, name, P2P badge) shown inline
- Lobby stays visible above the drawer at all times
- Stats line shows codec/packet/FEC info
- Leave voice = drawer slides away, FAB returns
Removed: full-screen call-screen, back button, old participant
list, old mic/speaker/hangup buttons. All voice interaction
happens in the 15% bottom drawer while the lobby stays live.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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