A JWT session pointing at a user no longer in the DB (e.g. after a DB reset)
made getUserSettings create settings for a non-existent user -> FK violation
(P2003) -> Server Component render crash. getUserSettings now returns defaults
on P2003; the (app) layout detects the missing user and redirects to a new
server-side /logout route that clears the cookie, avoiding the middleware
redirect loop that otherwise blocks reaching /login.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>