导入方式修改

backend/app/main_graph/nodes/finalize.py

@@ -6,9 +6,9 @@
 from typing import Any, Dict
 
 # 本地模块
-from app.main_graph.state import MainGraphState
-from app.utils.logging import log_state_change
-from app.logger import info, warning
+from ...main_graph.state import MainGraphState
+from ...utils.logging import log_state_change
+from ...logger import info, warning
 
 from langchain_core.runnables.config import RunnableConfig
 
@@ -35,7 +35,7 @@ async def finalize_node(state: MainGraphState, config: RunnableConfig) -> Dict[s
 
     try:
         # 获取流式写入器并发送完成事件
-        from app.main_graph.config import get_stream_writer
+        from backend.app.main_graph.config import get_stream_writer
         writer = get_stream_writer()
 
         # 只在 writer 存在且不是 noop 时才发送