Update app.py

app.py

@@ -14,10 +14,10 @@ def process_history(history):
     """Process chat history into the format expected by the model."""
     processed_history = []
     for user_msg, assistant_msg in history:
-        if user_msg:
-            processed_history.append({"role": "user", "content": [{"type": "text", "text": user_msg}]})
-        if assistant_msg:
-            processed_history.append({"role": "assistant", "content": [{"type": "text", "text": assistant_msg}]})
+        # Always add user message first, even if empty
+        processed_history.append({"role": "user", "content": [{"type": "text", "text": user_msg or ""}]})
+        # Always add assistant message, even if empty
+        processed_history.append({"role": "assistant", "content": [{"type": "text", "text": assistant_msg or ""}]})
     return processed_history
 
 
@@ -39,7 +39,11 @@ def respond(
     if system_message:
         messages.append({"role": "system", "content": [{"type": "text", "text": system_message}]})
     
-    messages.extend(process_history(history))
+    # Process the conversation history
+    if history:
+        messages.extend(process_history(history))
+    
+    # Add the new user message
     messages.append({"role": "user", "content": process_new_user_message(message)})
     
     # Apply chat template