优化

app/api/chat/ai/chat_router.py

@@ -51,7 +51,6 @@ async def h5_chat_stream(request: Request, inp: ChatIn):
     if not user_id:
         raise HTTPException(status_code=400, detail="缺少用户 ID")
 
-    knowledge = None
     spot = await extract_spot(inp.message)
     if spot:
         # 使用线程池异步执行同步函数
@@ -78,7 +77,7 @@ async def h5_chat_stream(request: Request, inp: ChatIn):
         cat = await classify(inp.message)
 
     async def content_stream() -> AsyncGenerator[str, None]:
-        global knowledge
+        knowledge = None
         nonlocal conversation_history
 
         # 记录热门问题（包括快捷问题）