Update app.py

app.py

@@ -5,6 +5,7 @@ from diffusers import WanPipeline, AutoencoderKLWan  # Use Wan-specific VAE
 from para_attn.first_block_cache.diffusers_adapters import apply_cache_on_pipe
 from diffusers.models import UNetSpatioTemporalConditionModel
 from transformers import T5EncoderModel, T5Tokenizer
+from huggingface_hub import hf_hub_download
 
 from PIL import Image
 import numpy as np