Update app.py

app.py

@@ -3,6 +3,14 @@ app.py — HeightAdaptor Hugging Face Spaces App
 Backbone : stable-diffusion-v1-5/stable-diffusion-v1-5
 Adaptor  : UEXdo/HeightAdaptor-weight
 """
+# ── ZeroGPU compatibility（无 spaces 库时自动降级）─────────────────────
+try:
+    import spaces
+except ImportError:
+    class spaces:
+        @staticmethod
+        def GPU(duration=120):
+            return lambda fn: fn
 
 import os, io
 import torch
@@ -16,15 +24,6 @@ from huggingface_hub import snapshot_download
 from peft import PeftModel
 import gradio as gr
 
-# ── ZeroGPU compatibility（无 spaces 库时自动降级）─────────────────────
-try:
-    import spaces
-except ImportError:
-    class spaces:
-        @staticmethod
-        def GPU(duration=120):
-            return lambda fn: fn
-
 from networks.semantic_head import SemanticHead
 from networks.height_head   import HeightHead
 from networks.decoder       import Decoder