gpt-4.1-nano: Drop fill width.

It looks too wide when using an extra-large monitor.

app.py

@@ -36,8 +36,7 @@ gr.load_chat(
         ["Explain about quantum computers."]
     ],  # Provide sample inputs for users to try
     cache_examples=False,  # Ensure responses always fresh
-    show_api=False,  # Disable Gradio API
-    fill_width=True  # Auto width, adjust to the monitor screen
+    show_api=False  # Disable Gradio API
 ).launch(
     max_file_size="1mb"  # Max image upload size limit
 )  # Start the app