Four tests covering the Members tab: invite + remove (action-menu +
phrase modal), role change, the non-app-admin viewer who never sees
the Members tab at all (cross-context via a second admin login),
and an adversarial that the role dropdown only exposes the
documented set of values.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
