fix: Clone a new agent per session to isolate the session conversation from others

Gradio_UI.py

@@ -186,10 +186,10 @@ class AgentCloner:
 
     def clone(self):
         new_model_client = HfApiModel(
-            max_tokens=self.model.max_tokens,
-            temperature=self.model.temperature,
-            model_id=self.model.model_id,
-            custom_role_conversions=self.model.custom_role_conversions,
+            max_tokens=self.model_client.max_tokens,
+            temperature=self.model_client.temperature,
+            model_id=self.model_client.model_id,
+            custom_role_conversions=self.model_client.custom_role_conversions,
         )
         new_agent = CodeAgent(
             model=new_model_client,