Update app.py

app.py

@@ -218,7 +218,8 @@ with gr.Blocks(title="ARF v4 Demo") as demo:
     history_btn.click(fn=lambda: decision_history[-10:], outputs=decision_output)
 
 # ========================= Mount FastAPI under /api =========================
-app = gr.mount_gradio_app(demo, fastapi_app, path="/api")
+# Correct order: first the FastAPI app, then the Gradio blocks.
+app = gr.mount_gradio_app(fastapi_app, demo, path="/api")
 
-# Note: No manual server start. Hugging Face will serve this `app` (which is a Gradio app)
-# and the FastAPI endpoints will be available under /api.
+# Note: No manual server start. Hugging Face will serve this `app` (which is a FastAPI app with Gradio mounted)
+# and the Gradio interface will be at the root, API endpoints under /api.