fixed no spaces.GPU function error.

requirements.txt

@@ -10,3 +10,4 @@ opencv-python-headless
 
 gradio==4.29.0
 gradio_client==0.16.1
+space

webui_gradio.py

@@ -10,6 +10,11 @@ import numpy as np
 import torch
 from PIL import Image
 
+try:
+    import spaces  # Hugging Face Spaces helper package
+except Exception:  # noqa: BLE001
+    spaces = None
+
 def _patch_fastapi_starlette_middleware_unpack() -> None:
     """
     Work around FastAPI/Starlette version mismatches where Starlette's Middleware
@@ -83,6 +88,14 @@ _patch_fastapi_starlette_middleware_unpack()
 
 import gradio as gr
 
+if spaces is not None:
+    # Hugging Face GPU Spaces require at least one @spaces.GPU-decorated function.
+    # We decorate a tiny no-op marker and also (optionally) wrap inference-heavy calls.
+    @spaces.GPU
+    def _spaces_gpu_marker():  # noqa: D401
+        """Marker function for Hugging Face GPU Spaces."""
+        return True
+
 def _launch_compat(demo: gr.Blocks, **kwargs):
     """
     Launch Gradio across versions by only passing supported kwargs.