修复流程编排界面点击执行出错的问题

backend/app/routes/nodes.py

@@ -17,9 +17,12 @@ async def execute_node(node_type: str, request: Request, request_data: Dict[str,
         # 获取session cookie
         session_cookie = request.cookies.get('sid')
         
+        # 从context中获取flow_id
+        flow_id = context.get('flow_id', '')
+        
         # 使用节点执行器执行节点（支持点分隔 node_type）
         executor = NodeExecutor()
-        result = await executor.execute_node(node_type, context, inputs, config, session_cookie)
+        result = await executor.execute_node(node_type, flow_id, context, inputs, config, session_cookie)
         
         return result