fix(CF-1170): Fix STT by correcting agent dispatch flow

Three fixes for voice agent not responding to speech:
1. Agent name: add --agent-name matrix-ai to CLI (was empty, dispatch couldnt match)
2. Move dispatch from on_invite to on_unknown call handler (dispatch when call starts, not on room join)
3. Use LiveKit room name from foci_preferred instead of raw Matrix room ID

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bot.py

@@ -97,22 +97,9 @@ class Bot:
     async def on_invite(self, room, event: InviteMemberEvent):
         if event.state_key != BOT_USER:
             return
-        logger.info("Invited to %s", room.room_id)
+        logger.info("Invited to %s, joining room", room.room_id)
         await self.client.join(room.room_id)
 
-        lk_room_name = room.room_id
-        try:
-            await self.lkapi.agent_dispatch.create_dispatch(
-                api.CreateAgentDispatchRequest(
-                    agent_name=AGENT_NAME,
-                    room=lk_room_name,
-                )
-            )
-            self.dispatched_rooms.add(room.room_id)
-            logger.info("Agent dispatched to %s", lk_room_name)
-        except Exception:
-            logger.exception("Dispatch failed for %s", room.room_id)
-
     async def on_sync(self, response: SyncResponse):
         """After each sync, trust all devices in our rooms."""
         for user_id in list(self.client.device_store.users):
@@ -145,6 +132,27 @@ class Bot:
                 "livekit_alias": room_id,
             }])
 
+            # Extract LiveKit room name from foci and dispatch agent
+            lk_room_name = room_id  # fallback
+            for f in foci:
+                if f.get("type") == "livekit" and f.get("livekit_alias"):
+                    lk_room_name = f["livekit_alias"]
+                    break
+            logger.info("LiveKit room name: %s (from foci_preferred)", lk_room_name)
+
+            if room_id not in self.dispatched_rooms:
+                try:
+                    await self.lkapi.agent_dispatch.create_dispatch(
+                        api.CreateAgentDispatchRequest(
+                            agent_name=AGENT_NAME,
+                            room=lk_room_name,
+                        )
+                    )
+                    self.dispatched_rooms.add(room_id)
+                    logger.info("Agent dispatched to LiveKit room %s", lk_room_name)
+                except Exception:
+                    logger.exception("Dispatch failed for %s", lk_room_name)
+
             # Send our own call member state event
             call_content = {
                 "application": "m.call",