New IRC-style lobby layout:
- Auto-connect on launch, drop into user list
- User rows with identicon, name, fingerprint, voice status
- Speaking indicator (green highlight + pulsing)
- Join Voice FAB (green, toggles to Leave/red)
- Incoming call banner (slides up from bottom)
- User context menu (tap user → Call / Message)
- Settings panel preserved from original
The old connect-screen HTML is removed. The call-screen is kept
intact. JS adaptation next.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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