bugfix：修复一些bug

app/processor/graph.py

@@ -81,7 +81,3 @@ def build_graph(checkpointer=None):
     if checkpointer is None:
         checkpointer = InMemorySaver(serde=build_checkpoint_serde())
     return workflow.compile(checkpointer=checkpointer)
-
-
-# 模块加载时创建共享图实例，复用该实例的调用也共用其检查点存储
-query_app = build_graph()

app/processor/nodes/screen_agent_node.py

@@ -62,8 +62,6 @@ class ScreenAgentNode(BaseNode):
                 ]
             },
             context=ScreenAgentContext(screen=context.screen, catalog=catalog),
-            # 调用次数由 ModelCallLimitMiddleware 限制，这里只防止异常循环
-            config={"recursion_limit": 4 * self.config.max_agent_steps + 10},
         )
         if result.get("structured_response") is None:
             last = result["messages"][-1]