Admin: notifications
The delivery log: what was sent, on which channel, to whom, and what the transport said about it. Opening a row shows the rendered message, or the reason there is none.
@alepha/ui/components/admin/admin-notificationsAdminNotifications
A preview answers `available: false` with a reason as a normal 200, because a purged outbox row and a sensitive template are both states to draw rather than errors.