refactor BasicAgent to use agent.run for question handling

app.py

@@ -15,10 +15,11 @@ class BasicAgent:
     def __init__(self):
         self.agent = create_agent()
     def __call__(self, question: str) -> str:
-        print(f"Agent received question (first 50 chars): {question[:50]}...")
-        fixed_answer = "This is a default answer."
-        print(f"Agent returning fixed answer: {fixed_answer}")
-        return fixed_answer
+        # print(f"Agent received question (first 50 chars): {question[:50]}...")
+        # fixed_answer = "This is a default answer."
+        # print(f"Agent returning fixed answer: {fixed_answer}")
+        # return fixed_answer
+        return self.agent.run(question)
 
 def run_and_submit_all( profile: gr.OAuthProfile | None):
     """