Password reset: multi-app support with custom notification linking to correct
frontend (app/portal/admin). Email change: self-service with password
confirmation and admin-initiated, both sending verification to new address
with 24h expiry. Confirmation sent to old email on completion. Password
change: authenticated endpoint revoking other sessions.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
