bug

app.py

@@ -98,19 +98,30 @@ def generate_reply(chat_history, user_message, max_new_tokens=512, temperature=0
     return reply
 
 def gradio_chat(user_message, history, max_new_tokens, temperature, top_p):
-    # Chatbot (type="messages") returns list of dicts with role/content
+    # Gradio Chatbot typically returns list of (user, assistant) tuples.
+    # Handle both tuple and dict formats defensively.
     history_messages = history or []
 
-    # Convert role/content messages into (user, assistant) pairs for the model
+    def _as_text(content):
+        # Gradio may wrap content as list of {"type": "text", "text": "..."} dicts
+        if isinstance(content, list):
+            return " ".join(
+                c.get("text", "") if isinstance(c, dict) else str(c)
+                for c in content
+            )
+        if isinstance(content, dict):
+            return content.get("text", "") or str(content)
+        return content
+
     history_pairs = []
     pending_user = None
     for msg in history_messages:
         if isinstance(msg, (list, tuple)) and len(msg) == 2:
-            history_pairs.append((msg[0], msg[1]))
+            history_pairs.append((_as_text(msg[0]), _as_text(msg[1])))
             pending_user = None
             continue
         role = msg.get("role")
-        content = msg.get("content", "")
+        content = _as_text(msg.get("content", ""))
         if role == "user":
             pending_user = content
         elif role == "assistant":
@@ -125,12 +136,9 @@ def gradio_chat(user_message, history, max_new_tokens, temperature, top_p):
         top_p=float(top_p),
     )
 
-    new_history = history_messages + [
-        {"role": "user", "content": user_message},
-        {"role": "assistant", "content": reply},
-    ]
+    new_history_pairs = history_pairs + [(user_message, reply)]
 
-    return "", new_history
+    return "", new_history_pairs
 
 # Custom CSS for messenger-style UI with peach/pink theme
 custom_css = """