The /v1/admin/webhook-deliveries endpoints from v0.1.0:43 were
operator-actionable via curl but invisible in the dashboard. Adds a
"Delivery history" section to the Webhooks page showing recent
deliveries with a status filter (defaults to "Failed (DLQ)" so the
problem case is what an operator sees first).
Each row shows created-at, event type, status badge (delivered /
failed / pending), attempt count, last status code, and last_error
inline beneath the status when present (so operators don't have to
chase a separate "details" view to know why a delivery failed).
Non-delivered rows get a Retry button that re-queues via the
existing POST /v1/admin/webhook-deliveries/:id/retry; the worker
picks up the retried row on its next 5s tick.
No backend changes. The endpoints landed in :43; this commit is
just the front-end surface.
Grant