Skip launch on Spaces; pin gradio_client<0.19

app.py

@@ -234,6 +234,6 @@ def build_ui() -> gr.Blocks:
 
 demo = build_ui()
 
-if __name__ == "__main__":
-    # Works locally and on Hugging Face Spaces
+# On Hugging Face Spaces, the runtime serves the app; avoid calling launch().
+if __name__ == "__main__" and os.getenv("SPACE_ID") is None:
     demo.launch()

requirements.txt

@@ -3,3 +3,4 @@ soundfile
 scipy
 huggingface_hub<0.25
 pymongo
+gradio_client<0.19