重构了一下

function_calls/services/__init__.py

@@ -3,6 +3,7 @@
 from .reminder import create_reminder, list_reminders, delete_reminder
 from .group_tools import summarize_messages
 from .perplexity import run_perplexity
+from .chat import run_chat_fallback
 
 __all__ = [
     "create_reminder",
@@ -10,4 +11,5 @@ __all__ = [
     "delete_reminder",
     "summarize_messages",
     "run_perplexity",
+    "run_chat_fallback",
 ]