Update app.py

app.py

@@ -1,7 +1,26 @@
 import gradio as gr
 
+def convert_tuples_to_message_dicts(messages):
+    """
+    Converts a list of tuples [('user', 'hi'), ...] 
+    to OpenAI style messages [{'role': 'user', 'content': 'hi'}, ...].
+    Leaves existing dicts unchanged.
+    """
+    converted = []
+    for msg in messages:
+        if isinstance(msg, tuple) and len(msg) == 2:
+            role, content = msg
+            converted.append({"role": role, "content": content})
+        elif isinstance(msg, dict) and "role" in msg and "content" in msg:
+            converted.append(msg)
+        else:
+            raise ValueError(f"Invalid message format: {msg}")
+    return converted
+
 def echo(message, history=None):
     history = history or []
+    # Important: Clean up incoming history, just in case
+    history = convert_tuples_to_message_dicts(history)
 
     message_lower = message.lower()
     if 'dahlia' in message_lower:
@@ -13,13 +32,9 @@ def echo(message, history=None):
     else:
         response = f'{message} ... Always.'
 
-    # Append user message
     history.append({"role": "user", "content": message})
-    # Append assistant response
     history.append({"role": "assistant", "content": response})
-
-    # Return updated history as both output and chat history state
-    return history, history
+    return history
 
 chat = gr.ChatInterface(
     fn=echo,