This PR resolves an issue where the `href` for the Logout button in the
admin panel included duplicate `basePath` values when `basePath` was set
in `next.config.js`.
The Logout button was recently updated to use `NextLink` (`next/link`),
which automatically applies the `basePath` from the Next.js
configuration. As a result, manually adding the `basePath` to the `href`
is no longer necessary.
Relevant PRs that modified this behavior originally:
- #9275
- #11155
f7b1cd9d63