Add admin endpoints to ban and activate users, block banned users
from all auth flows (OAuth, token login, bearer auth), and invalidate
existing sessions on next request. Includes frontend translation and
user detail page ban/activate buttons.
The Generate button silently no-op'd because ng-model="newTokenName" inside
an ng-if block wrote to a child scope, leaving $scope.newTokenName empty.
Use $scope.tokenForm.{name,plaintext} so prototypal lookup resolves to the
controller scope.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>