feat: 修改drawing 为django 接口

backend/ai/views/__init__.py

@@ -5,6 +5,7 @@ __all__ = [
    'KnowledgeViewSet',
    'ChatConversationViewSet',
    'ChatMessageViewSet',
+   'DrawingViewSet',
 ]
 
 from ai.views.ai_api_key import AIApiKeyViewSet
@@ -12,4 +13,5 @@ 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_message import ChatMessageViewSet
+from ai.views.chat_message import ChatMessageViewSet
+from ai.views.drawing import DrawingViewSet