fix button

app.py

@@ -107,8 +107,8 @@ def generate_uuids_and_file(count: int):
     # Write to file
     fpath.write_text(text, encoding="utf-8")
 
-    # Return both the text and a download button linked to the file
-    return text, gr.DownloadButton.update(value=str(fpath), visible=True)
+    # IMPORTANT: use gr.update(...) instead of DownloadButton.update(...)
+    return text, gr.update(value=str(fpath), visible=True)
 
 
 # ---------------------------
@@ -133,11 +133,11 @@ with gr.Blocks(title=CFG.TITLE) as demo:
         show_copy_button=True,
     )
 
+    # Initially hidden; becomes visible with a valid file path
     dbtn = gr.DownloadButton(CFG.LABEL_DOWNLOAD_BTN, visible=False)
 
     btn.click(generate_uuids_and_file, inputs=num, outputs=[out, dbtn])
 
-
 if __name__ == "__main__":
-    # On HF Spaces, `demo.launch()` can be plain; config via env vars controls behavior/labels.
+    # Tip: on HF Spaces, set share=True if you want a public link
     demo.launch()