Fix:reset the agent component’s output (#11222)

### What problem does this PR solve?

change:
“After each dialogue turn, the agent component’s output is not reset.”

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

agent/component/agent_with_tools.py

@@ -368,11 +368,19 @@ Respond immediately with your final comprehensive answer.
 
         return "Error occurred."
 
-    def reset(self, temp=False):
+    def reset(self, only_output=False):
         """
         Reset all tools if they have a reset method. This avoids errors for tools like MCPToolCallSession.
         """
+        for k in self._param.outputs.keys():
+            self._param.outputs[k]["value"] = None
+            
         for k, cpn in self.tools.items():
             if hasattr(cpn, "reset") and callable(cpn.reset):
                 cpn.reset()
+        if only_output:
+            return
+        for k in self._param.inputs.keys():
+            self._param.inputs[k]["value"] = None
+        self._param.debug_inputs = {}
 

agent/component/llm.py

@@ -222,7 +222,7 @@ class LLM(ComponentBase):
             output_structure = self._param.outputs['structured']
         except Exception:
             pass
-        if output_structure:
+        if output_structure and isinstance(output_structure, dict) and output_structure.get("properties"):
             schema=json.dumps(output_structure, ensure_ascii=False, indent=2)
             prompt += structured_output_prompt(schema)
             for _ in range(self._param.max_retries+1):