Fix torchvision compatibility: install torchvision<0.20 with torch<2.9

app.py

@@ -4,10 +4,10 @@ Gradio Demo for Chinese Calligraphy Generation - HuggingFace Space Version
 With Float8 quantization and AOT compilation for faster inference
 """
 
-# Install compatible torch + spaces versions (following FLUX-Kontext-fp8 pattern)
+# Install compatible torch + torchvision + spaces versions (following FLUX-Kontext-fp8 pattern)
 import os
-os.system('pip install --upgrade --pre --extra-index-url https://download.pytorch.org/whl/nightly/cu126 "torch<2.9" spaces')
-print("torch + spaces installation complete!")
+os.system('pip install --upgrade --pre --extra-index-url https://download.pytorch.org/whl/nightly/cu126 "torch<2.9" "torchvision<0.20" spaces')
+print("torch + torchvision + spaces installation complete!")
 
 # IMPORTANT: import spaces first before any CUDA-related packages
 import spaces