[Feature Request] Configurable logout landing page in UAA

[duanemay]

Summary

We would like to show a dedicated logout page when users sign out of UAA-backed applications, instead of immediately redirecting them to /login or an application-specific URL.

Today, /logout.do terminates the UAA session and then redirects the user to a configured URL (default /login, or the value of logout.redirect.url

We’d like UAA to optionally render a configurable “You have been logged out” page that:

• Confirms sign-out clearly to the user
• Can include operator-controlled messaging / branding

This feature should be opt-in and preserve current behavior by default.