runtime fix

app.py

@@ -240,7 +240,7 @@ else:
     autoencoder.eval()
     assert len(missing_keys) == 0 and len(extra_keys) == 0
 sam_path = hf_hub_download(repo_id="Chaerin5/FoundHand-weights", filename="sam_vit_h_4b8939.pth")
-sam_predictor = init_sam(ckpt_path="./sam_vit_h_4b8939.pth", device=device)
+sam_predictor = init_sam(ckpt_path=sam_path, device=device)
 
 
 print("Mediapipe hand detector and SAM ready...")