[Admin maintenance] Support new ZeroGPU hardware (#2)

- [Admin maintenance] Support new ZeroGPU hardware (32a87bd1c492e8ce7b211427637ca760247d6998)

app.py

@@ -1,3 +1,17 @@
+# ZeroGPU/Blackwell maintenance: restore HfFolder (removed from newer huggingface_hub, still
+# imported by older gradio/oauth.py). Must run before `import spaces` (which imports gradio).
+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 torch
 import gradio as gr
 from PIL import Image