添加聊天消息

backend/ai/views/__init__.py

@@ -4,10 +4,12 @@ __all__ = [
    'ToolViewSet',
    'KnowledgeViewSet',
    'ChatConversationViewSet',
+   'ChatMessageViewSet',
 ]
 
 from ai.views.ai_api_key import AIApiKeyViewSet
 from ai.views.ai_model import AIModelViewSet
 from ai.views.tool import ToolViewSet
 from ai.views.knowledge import KnowledgeViewSet
-from ai.views.chat_conversation import ChatConversationViewSet
+from ai.views.chat_conversation import ChatConversationViewSet
+from ai.views.chat_message import ChatMessageViewSet