Update app.py

app.py

@@ -536,9 +536,12 @@ def prepare_message_with_media(text, images=None, documents=None):
 def format_to_message_dict(history):
     """Convert history to proper message format"""
     messages = []
-    for pair in history:
-        if len(pair) == 2:
-            human, ai = pair
+    for message in history:
+        if isinstance(message, dict) and "role" in message and "content" in message:
+            # Already in the correct format
+            messages.append(message)
+        elif len(message) == 2:  # Handle old format [user_msg, ai_msg]
+            human, ai = message
             if human:
                 messages.append({"role": "user", "content": human})
             if ai: