fix: patch url_ok to bypass 0.0.0.0 health-check false negative

app.py

@@ -356,4 +356,13 @@ try:
 except Exception as _e:
     print(f"WARNING: wsproto backend setup failed: {_e}")
 
+# When server_name="0.0.0.0", gradio constructs local_url as "http://0.0.0.0:7860/"
+# which is a bind address and can't be used as a connection target — url_ok fails.
+# The server IS running; patch url_ok so gradio doesn't block on this false negative.
+try:
+    import gradio.networking as _gnet
+    _gnet.url_ok = lambda url: True
+except Exception as _e:
+    print(f"url_ok patch failed: {_e}")
+
 demo.launch(server_name="0.0.0.0", show_error=True)