fix: drop ChatInterface(type=...) — gone in Gradio 6.x

app.py

@@ -201,9 +201,11 @@ with gr.Blocks(title="QuickSilver Pro Chat") as demo:
             # Gradio 6.0 removed the submit_btn / retry_btn / undo_btn / clear_btn
             # args in favor of a more opinionated default layout; dropping them
             # keeps this compatible with both 5.x and 6.x.
+            # Gradio 6.x: ChatInterface dropped the `type=` kwarg; messages
+            # format is now the default and tuples are gone. `respond()` is
+            # already written against the dict-history shape.
             gr.ChatInterface(
                 fn=respond,
-                type="messages",
                 additional_inputs=[model_dropdown, system_prompt, temperature, max_tokens],
                 examples=[
                     ["Write a concise git commit message for: fixed off-by-one error in pagination"],