Fields "Retention time" and "From date of" are ignored

[mayonezo]

Steps to reproduce

1. Create a new retention rule.
2. Enter: Tag "5" "Days" "Creation"

Expected behaviour

The input of fields "Retention time" and "From date of" are transferred to the new retention rule.

Actual behaviour

"Retention time" is "weeks" and "From date of" is "Last modification".

Server configuration

Operating system: Debian Bookworm

Web server: Apache2

Database: MariaDB

PHP version: 8.2

Nextcloud version: 28.0.2

Where did you install Nextcloud from: Manual install

### Client configuration
**Browser:** Google Chrome

**Operating system:** Windows 10