feat: fix gradio history object bug

app.py

@@ -23,10 +23,16 @@ def respond(
     )
 
     def sanitize_messages(history):
-        return [
-            {"role": m["role"], "content": m["content"]}
-            for m in history
-        ]
+        sanitized = []
+        for m in history:
+            # Check if it's the new dictionary format
+            if isinstance(m, dict):
+                sanitized.append({"role": m["role"], "content": m["content"]})
+            # Check if it's the old list/tuple format [user, bot]
+            elif isinstance(m, (list, tuple)):
+                if m[0]: sanitized.append({"role": "user", "content": m[0]})
+                if m[1]: sanitized.append({"role": "assistant", "content": m[1]})
+        return sanitized
 
     messages = [{"role": "system", "content": system_message}]
     messages.extend(sanitize_messages(history))