updatation

app.py

@@ -350,15 +350,12 @@ with gr.Blocks(title="Tayyab — Chatbot") as demo:
     new_chat_btn.click(new_chat, outputs=[chatbot])
 
     def export_handler(history):
-            
-            # Convert Gradio chatbot format → list of dicts
-        formatted = []
-        if history:
-            for u, a in history:
-                formatted.append({"role": "user", "content": u})
-                formatted.append({"role": "assistant", "content": a})
-            
-        files = export_chat_files(formatted)
+        
+        if not isinstance(history, list):
+             history = []
+        
+        files = export_chat_files(history)
+        
         return (
             gr.update(value=files.get("txt"), visible=True),
             gr.update(value=files.get("pdf"), visible=bool(files.get("pdf")))