Revert "v2"

This reverts commit 6751efe9fab59a6b2854965bf263ab30a201ac30.

app.py

@@ -542,12 +542,12 @@ async def stream_agent_response(question: str, chat_history: List[List[str]]) ->
     except Exception as e:
         logger.error(f"Error updating agent memory: {str(e)}", exc_info=True)
     
+    # Add empty assistant message that will be updated
+    assistant_message = {"role": "assistant", "content": ""}
+    messages.append(assistant_message)
+    
     # Execute the agent with proper error handling
     try:
-        # Add empty assistant message that will be updated
-        assistant_message = {"role": "assistant", "content": ""}
-        messages.append(assistant_message)
-        
         # If the user is asking for a chart, steer the agent to be concise
         wants_chart, _desired = detect_chart_preferences(question)
         input_text = question