Disable Gradio SSR (ssr_mode=False) to avoid event-loop shutdown errors

app.py

@@ -6,4 +6,5 @@ demo = build_interface()
 if __name__ == "__main__":
     # Respect common env vars used by hosting platforms
     port = int(os.environ.get("PORT", os.environ.get("GRADIO_SERVER_PORT", 7860)))
-    demo.launch(server_name="0.0.0.0", server_port=port)
+    # Disable experimental SSR to avoid event-loop shutdown issues
+    demo.launch(server_name="0.0.0.0", server_port=port, ssr_mode=False)