Maybe the OssLicense screen should be in dark mode only

[kosenda]

Overview

Currently, the dark and light modes have changed depending on the OS environment in OssLicense, but I thought it would not be good for the app to suddenly have a white light screen in terms of its design.

https://github.com/user-attachments/assets/a9d8bca7-0a30-4f79-910b-50d83877783f

[kuwabara-hirokazu]

I would like to take on the challenge.