Fix Gradio compatibility: update to new message format and remove deprecated parameters

gradio_app.py

@@ -173,7 +173,7 @@ def chat_with_model(message, history, num_questions, difficulty, temperature):
         return history, ""
     
     # Add user message to history
-    history.append([message, None])
+    # Use new message format instead
     
     # Generate questions
     questions = model_manager.generate_questions(
@@ -192,7 +192,7 @@ def chat_with_model(message, history, num_questions, difficulty, temperature):
         response = "I couldn't generate questions from that statement. Please try rephrasing it."
     
     # Add bot response to history
-    history[-1][1] = response
+    history.append({"role": "user", "content": message}); history.append({"role": "assistant", "content": response})
     
     return history, ""
 
@@ -250,7 +250,7 @@ with gr.Blocks(css=css, title="Question Generation AI", theme=gr.themes.Soft())
                 label="Chat",
                 show_label=False,
                 avatar_images=(None, None),
-                bubble_full_width=False,
+                type="messages",  # Use new message format
                 show_share_button=False
             )
             
@@ -333,7 +333,4 @@ if __name__ == "__main__":
         server_port=7860,
         share=False,
         show_error=True,
-        show_tips=False,
-        enable_queue=True,
-        max_threads=10
     )