Update app.py

app.py

@@ -2,10 +2,10 @@ import gradio as gr
 from fastapi import FastAPI
 from risk_model import predict_risk, retrain_model, get_history_df
 
-# FastAPI backend
-app = FastAPI()
+# Create FastAPI instance
+fastapi_app = FastAPI()
 
-# Gradio UI
+# Create Gradio app
 gradio_app = gr.Blocks()
 
 with gradio_app:
@@ -35,9 +35,10 @@ with gradio_app:
     predict_btn.click(classify, inputs=[temp, duration], outputs=[result, score, history_table])
     retrain_btn.click(retrain_model, outputs=[retrain_output])
 
-# Mount Gradio UI on FastAPI
-@app.get("/")
+# Optional: basic route to test API is up
+@fastapi_app.get("/")
 def root():
-    return {"message": "Heating Mantle Risk API is live!"}
+    return {"status": "Heating Mantle API is live"}
 
-app = gr.mount_gradio_app(app, gradio_app, path="/predict-ui")
+# ✅ Hugging Face requires this line exactly
+app = gr.mount_gradio_app(fastapi_app, gradio_app, path="/predict-ui")