Craft Admin Panel Controllers

Install

composer require deuxhuithuit/craft-admin-panel-controllers
./craft plugin/install admin-panel-controllers

It will add 3 endpoints:

/actions/admin-panel-controllers/dashboard/redirect
/actions/admin-panel-controllers/auth/check
/actions/admin-panel-controllers/edit/redirect?site={entry.site}&uri={entry.uri}

For the auth check to work in headless mode, sameSiteCookieValue in general.php has to be set to none.