Update app.py

app.py

@@ -177,3 +177,14 @@ elif menu == "Student Evaluation":
         firebase_put(f"student_quizzes/{selected_id}/{choose_quiz}/Feedback", feedback)
         st.success("Feedback sent successfully!")
         st.rerun()
+
+# Optional Gradio launcher (no-op if demo missing)
+if _name_ == "_main_":
+    try:
+        if "demo" in globals() and getattr(globals()["demo"], "launch", None):
+            try:
+                globals()["demo"].launch(server_name="0.0.0.0", server_port=7860, ssr_mode=False)
+            except Exception as e:
+                print(f"Gradio demo exists but failed to launch: {e}")
+    except Exception as e:
+        print(f"Error when attempting to launch Gradio demo: {e}")