Allow Removal or Customization of Default 'Login/Register' Button with translations

The public portal currently displays a default 'login/register' button that points to the Featurebase website.

There is no option to remove this button or customize its URL to point to a client's specific login/registration page.

This limitation is problematic for clients who wish to control their user authentication flow and branding, especially in multilingual contexts where a single static link is insufficient.

The request is to provide functionality to either remove this default button entirely or allow its URL to be fully customized by the client.