fix(CF-1189): Fix room.timeline crash, add markdown rendering, improve verification routing

- Replace room.timeline (non-existent in nio) with client.room_messages() API
- Add markdown-to-HTML conversion for formatted Matrix messages
- Route in-room verification events from both UnknownEvent and RoomMessageUnknown

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

bot.py

@@ -2,6 +2,7 @@ import os
 import json
 import asyncio
 import logging
+import re
 import time
 import uuid
 
@@ -179,7 +180,13 @@ class Bot:
                     logger.info("Auto-trusted device %s of %s", device.device_id, user_id)
 
     async def on_unknown(self, room, event: UnknownEvent):
-        """Handle call member state events to join calls."""
+        """Handle call member state events and in-room verification."""
+        # Route verification events
+        if event.type.startswith("m.key.verification."):
+            if event.sender != BOT_USER:
+                await self._route_verification(room, event)
+            return
+
         if event.type != CALL_MEMBER_TYPE:
             return
         if event.sender == BOT_USER:
@@ -374,17 +381,21 @@ class Bot:
         if doc_context:
             messages.append({"role": "system", "content": doc_context})
 
-        # Last N messages from room timeline as context
+        # Fetch last N messages from room via API
-        timeline = room.timeline
+        try:
-        history = list(timeline)[-10:] if timeline else []
+            resp = await self.client.room_messages(
-        for evt in history:
+                room.room_id, start=self.client.next_batch or "", limit=10
+            )
+            if hasattr(resp, "chunk"):
+                for evt in reversed(resp.chunk):
                     if not hasattr(evt, "body"):
                         continue
                     role = "assistant" if evt.sender == BOT_USER else "user"
                     messages.append({"role": role, "content": evt.body})
+        except Exception:
+            logger.debug("Could not fetch room history, proceeding without context")
 
-        # Ensure last message is the current user message
+        # Add current user message
-        if not messages or messages[-1].get("content") != user_message:
         messages.append({"role": "user", "content": user_message})
 
         try:
@@ -399,6 +410,23 @@ class Bot:
             logger.exception("LLM call failed")
             await self._send_text(room.room_id, "Sorry, I couldn't generate a response.")
 
+    @staticmethod
+    def _md_to_html(text: str) -> str:
+        """Minimal markdown to HTML for Matrix formatted_body."""
+        import html as html_mod
+        safe = html_mod.escape(text)
+        # Code blocks (```...```)
+        safe = re.sub(r"```(\w*)\n(.*?)```", r"<pre><code>\2</code></pre>", safe, flags=re.DOTALL)
+        # Inline code
+        safe = re.sub(r"`([^`]+)`", r"<code>\1</code>", safe)
+        # Bold
+        safe = re.sub(r"\*\*(.+?)\*\*", r"<strong>\1</strong>", safe)
+        # Italic
+        safe = re.sub(r"\*(.+?)\*", r"<em>\1</em>", safe)
+        # Line breaks
+        safe = safe.replace("\n", "<br/>")
+        return safe
+
     async def _send_text(self, room_id: str, text: str):
         await self.client.room_send(
             room_id,
@@ -407,32 +435,65 @@ class Bot:
                 "msgtype": "m.text",
                 "body": text,
                 "format": "org.matrix.custom.html",
-                "formatted_body": text,
+                "formatted_body": self._md_to_html(text),
             },
         )
 
+    async def _route_verification(self, room, event: UnknownEvent):
+        """Route in-room verification events from UnknownEvent."""
+        source = event.source or {}
+        verify_type = event.type
+        logger.info("Verification event: %s from %s", verify_type, event.sender)
+
+        if verify_type == "m.key.verification.request":
+            await self._handle_verification_request(room, source)
+        elif verify_type == "m.key.verification.start":
+            await self._handle_verification_start(room, source)
+        elif verify_type == "m.key.verification.key":
+            await self._handle_verification_key(room, source)
+        elif verify_type == "m.key.verification.mac":
+            await self._handle_verification_mac(room, source)
+        elif verify_type == "m.key.verification.cancel":
+            content = source.get("content", {})
+            txn = content.get("m.relates_to", {}).get("event_id", "")
+            self._verifications.pop(txn, None)
+            logger.info("Verification cancelled: %s", txn)
+        elif verify_type == "m.key.verification.done":
+            pass  # Other side confirmed done
+
     async def on_room_unknown(self, room, event: RoomMessageUnknown):
         """Handle in-room verification events."""
         source = event.source or {}
         content = source.get("content", {})
         event_type = source.get("type", "")
+        msgtype = content.get("msgtype", "")
 
-        if not event_type.startswith("m.key.verification."):
+        logger.info("RoomMessageUnknown: type=%s msgtype=%s sender=%s", event_type, msgtype, event.sender)
+
+        # In-room verification events can come as m.room.message with msgtype=m.key.verification.*
+        # or as direct event types m.key.verification.*
+        verify_type = ""
+        if event_type.startswith("m.key.verification."):
+            verify_type = event_type
+        elif msgtype.startswith("m.key.verification."):
+            verify_type = msgtype
+
+        if not verify_type:
             return
         if event.sender == BOT_USER:
             return
 
-        logger.info("Verification event: %s from %s", event_type, event.sender)
+        logger.info("Verification event: %s from %s", verify_type, event.sender)
 
-        if event_type == "m.key.verification.request":
+        if verify_type == "m.key.verification.request":
             await self._handle_verification_request(room, source)
-        elif event_type == "m.key.verification.start":
+        elif verify_type == "m.key.verification.start":
             await self._handle_verification_start(room, source)
-        elif event_type == "m.key.verification.key":
+        elif verify_type == "m.key.verification.key":
             await self._handle_verification_key(room, source)
-        elif event_type == "m.key.verification.mac":
+        elif verify_type == "m.key.verification.mac":
             await self._handle_verification_mac(room, source)
-        elif event_type == "m.key.verification.cancel":
+        elif verify_type == "m.key.verification.cancel":
             txn = content.get("m.relates_to", {}).get("event_id", "")
             self._verifications.pop(txn, None)
             logger.info("Verification cancelled: %s", txn)