[Feature Request] Import/Export User data

[Feature Request] Import/Export User data

Please add an option to import and export user data. This would help prevent data loss when browser cache or site data is cleared.

Thanks @Aldhanekaa

Cloud-based sync for progress would also be valuable, though it may require more development effort and can be considered as a future enhancement.

Backup Solution Extension

https://github.com/cjspd-oly/PracticeSAT-LocalStorage-Backup