can't download podcast files

There  was an error  when to download podcast file,said  'can’t determin file exsition
Could not determine file extension for downloaded file.Blob:3864446 bytes.',and creating podnote(md file) worked well

<img width="293" height="92" alt="Image" src="https://github.com/user-attachments/assets/4aabd133-0b05-4ebd-87b3-ba790dae8a64" />
