- New Users page tabs (Users & roles / Access requests / Demo) and a tab-ified Configuration
page, both via a reusable Tabs component (persisted active tab).
- Admin can suspend/unsuspend (migration 0023 adds users.is_suspended) and delete accounts
from the Users & roles tab, with guards (demo / self / last admin).
- Email notifications to the affected user: suspended (reactive, on a blocked sign-in),
reinstated, role changed, and account deleted; the approval email now carries a clickable
app link. The scheduled/manual demo reset also seeds sample channel subscriptions.
- Hide the 'unverified email' chip for Google accounts (Google attests the email).
