Update app.py

app.py

@@ -101,4 +101,16 @@ with gr.Blocks(title="SysLink Food System Chatbot") as demo:
         b.click(suggestion_click, inputs=[b, chat, state], outputs=[user_in, chat, state, s1, s2, s3, s4, s5, s6])
 
 # ✅ Required for Hugging Face Gradio runtime stability
-demo.queue()
+demo.queue()
+
+# ✅ Keep the Space running (your Space exits without this)
+if __name__ == "__main__":
+    # Hugging Face sets one fixed port (often 7861). Use it if provided.
+    port = int(os.environ.get("GRADIO_SERVER_PORT") or os.environ.get("PORT") or "7860")
+    os.environ["GRADIO_SERVER_PORT"] = str(port)
+
+    demo.launch(
+        server_name="0.0.0.0",
+        server_port=port,
+        show_error=True,
+    )