Update app.py

app.py

@@ -8,7 +8,7 @@ import spaces
 # Download models from HuggingFace Hub on startup
 def download_models():
     """Download all required model files from HuggingFace Hub."""
-    cache_dir = os.environ.get("HF_HOME", os.path.expanduser("~/.cache/huggingface"))
+    cache_dir = os.environ.get("HF_HOME", os.path.expanduser("/tmp"))
     model_dir = os.path.join(cache_dir, "heartmula_models")
 
     if not os.path.exists(model_dir):