The REST API requests in Site Health and App Passwords now include `_locale=user` in the request URL to ensure the user's locale is used instead of the site locale. Additionally, the `apiRequest` library now sends a JSON `Accept` header which is required by `determine_locale()` to respect the `_locale` query parameter.
The Site Health REST API controllers now manually load the default admin textdomain if not `is_admin()`. This allows for the Site Health tests to be translated even though the translations are part of the administration project and the REST API is not.
Props oglekler, kebbet, Clorith, TimothyBlynJacobs, ocean90, SergeyBiryukov, adamsilverstein.
Fixes#51871.
git-svn-id: https://develop.svn.wordpress.org/trunk@49716 602fd350-edb4-49c9-b593-d223f7449a82
When constructing the request URL, ensure that `?` is replaced with `&` when the API root already contains a `?`. Fixes an issue where requests were broken when sites had permalinks set to plain.
Props aduth.
Fixes#42382.
git-svn-id: https://develop.svn.wordpress.org/trunk@42965 602fd350-edb4-49c9-b593-d223f7449a82
