Update model, fix file handling, and return string

app.py

@@ -27,7 +27,7 @@ class BasicAgent:
             raise ValueError("GEMINI_API_KEY not set in environment variables.")
 
         self.model = GoogleGenAI(
-            model="gemini-2.0-flash",
+            model="gemini-2.0-flash-lite",
             api_key=gemini_api_key
         )
 
@@ -56,7 +56,7 @@ class BasicAgent:
         request = ChatMessage(role="user", blocks=blocks)
         response = await self.agent.run(request)
         print(f"Agent returning fixed answer: {response}")
-        return response
+        return str(response)
 
 def reversed_string(a_string: str):
     """Reverses a string"""
@@ -84,7 +84,6 @@ def run_and_submit_all( profile: gr.OAuthProfile | None):
     api_url = DEFAULT_API_URL
     questions_url = f"{api_url}/questions"
     submit_url = f"{api_url}/submit"
-    download_url = f"{api_url}/files/"
 
     # 1. Instantiate Agent ( modify this part to create your agent)
     try:
@@ -131,8 +130,7 @@ def run_and_submit_all( profile: gr.OAuthProfile | None):
         try:
             messages = [question_text]
             if file_name:
-                file_url = download_url + file_name
-                messages.append(file_url)
+                messages.append(file_name)
             submitted_answer = asyncio.run(agent(messages))
             answers_payload.append({"task_id": task_id, "submitted_answer": submitted_answer})
             results_log.append({"Task ID": task_id, "Question": question_text, "Submitted Answer": submitted_answer})