fix: improve telegram topic mode setup

agent/title_generator.py

@@ -17,6 +17,7 @@ logger = logging.getLogger(__name__)
 # so silent-drops (e.g. OpenRouter 402 exhausting the fallback chain)
 # become visible instead of piling up as NULL session titles.
 FailureCallback = Callable[[str, BaseException], None]
+TitleCallback = Callable[[str], None]
 
 _TITLE_PROMPT = (
     "Generate a short, descriptive title (3-7 words) for a conversation that starts with the "
@@ -90,6 +91,7 @@ def auto_title_session(
     assistant_response: str,
     failure_callback: Optional[FailureCallback] = None,
     main_runtime: dict = None,
+    title_callback: Optional[TitleCallback] = None,
 ) -> None:
     """Generate and set a session title if one doesn't already exist.
 
@@ -119,6 +121,11 @@ def auto_title_session(
     try:
         session_db.set_session_title(session_id, title)
         logger.debug("Auto-generated session title: %s", title)
+        if title_callback is not None:
+            try:
+                title_callback(title)
+            except Exception:
+                logger.debug("Auto-title callback failed", exc_info=True)
     except Exception as e:
         logger.debug("Failed to set auto-generated title: %s", e)
 
@@ -131,6 +138,7 @@ def maybe_auto_title(
     conversation_history: list,
     failure_callback: Optional[FailureCallback] = None,
     main_runtime: dict = None,
+    title_callback: Optional[TitleCallback] = None,
 ) -> None:
     """Fire-and-forget title generation after the first exchange.
 
@@ -152,7 +160,11 @@ def maybe_auto_title(
     thread = threading.Thread(
         target=auto_title_session,
         args=(session_db, session_id, user_message, assistant_response),
-        kwargs={"failure_callback": failure_callback, "main_runtime": main_runtime},
+        kwargs={
+            "failure_callback": failure_callback,
+            "main_runtime": main_runtime,
+            "title_callback": title_callback,
+        },
         daemon=True,
         name="auto-title",
     )