Update app.py for new hub version and download to local

app.py

@@ -7,6 +7,7 @@ from huggingface_hub import hf_hub_download
 from huggingface_hub import list_repo_files
 import io
 import zipfile
+import shutil
 
 # Replace this with your actual Hugging Face repo ID
 REPO_ID = "PortPy-Project/PortPy_Dataset"
@@ -327,6 +328,8 @@ def main():
                 status = st.empty()
 
                 local_dir = "./downloaded"
+                if os.path.exists(local_dir):
+                    shutil.rmtree(local_dir)
                 os.makedirs(local_dir, exist_ok=True)
 
                 patient_to_beams = {
@@ -351,7 +354,7 @@ def main():
 
                 # Create zip in memory
                 buf = io.BytesIO()
-                with zipfile.ZipFile(buf, "w", zipfile.ZIP_DEFLATED) as zf:
+                with zipfile.ZipFile(buf, "w", zipfile.ZIP_STORED) as zf:
                     for root, _, files in os.walk(local_dir):
                         for f in files:
                             full_path = os.path.join(root, f)