[Admin maintenance] Support new ZeroGPU hardware

app.py

@@ -1,3 +1,17 @@
+# --- ZeroGPU/Blackwell maintenance: newer huggingface_hub dropped HfFolder, which older
+# gradio (gradio/oauth.py) still imports at load time. Restore a minimal shim before that import. ---
+import huggingface_hub
+if not hasattr(huggingface_hub, "HfFolder"):
+    class HfFolder:
+        @staticmethod
+        def get_token(): return huggingface_hub.get_token()
+        @staticmethod
+        def save_token(token): huggingface_hub.login(token)
+        @staticmethod
+        def delete_token():
+            try: huggingface_hub.logout()
+            except Exception: pass
+    huggingface_hub.HfFolder = HfFolder
 import gradio as gr
 import os
 import torch