Update hf_demo.py

hf_demo.py

@@ -1050,6 +1050,8 @@ app = mount_gradio_app(app, gradio_ui, path="/")
 # ============== MAIN ENTRY POINT ==============
 if __name__ == "__main__":
     import uvicorn
+    
+    # ✅ Use PORT environment variable (defaults to 7860 for HF Spaces)
     port = int(os.environ.get('PORT', 7860))
     
     logger.info("="*60)
@@ -1060,7 +1062,7 @@ if __name__ == "__main__":
     logger.info(f"🌐 Serving at: http://0.0.0.0:{port}")
     logger.info("="*60)
     
-    # ✅ REMOVE gradio_ui.launch() - FastAPI serves Gradio
+    # ✅ Run on the correct port
     uvicorn.run(
         app, 
         host="0.0.0.0",