On relay-mediated calls, the relay broadcasts RoomUpdate with the
participant list and pollStatus renders it. On direct P2P calls
neither peer joins the relay's media room, so RoomUpdate never
fires and the UI showed "Waiting for participants..." even though
audio was flowing bidirectionally.
Fix: track the peer's identity (fingerprint + alias) from the
signal plane in a `directCallPeer` variable:
- Set on incoming call from the DirectCallOffer (caller_fp +
caller_alias)
- Set on outgoing call from the Call button click (target_fp)
- Cleared on showConnectScreen (call ended)
pollStatus now checks: if the engine's participant list is empty
AND directCallPeer is set, inject a synthetic participant entry
with relay_label = "P2P Direct". The participant row renders with
identicon + fingerprint + alias as normal, but grouped under a
"P2P Direct" header instead of "This Relay".
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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