Extract the pagination controls shared by the events and users lists into
components/admin/Pagination, along with a usePaginatedList helper that slices a
list and keeps the page in range when the list shrinks under it.
Bookings, the Attendees tab and the Tickets tab paginate client-side rather than
on the server: each already loads its full set for figures a slice would break —
the bookings stat cards, the group-booking totals and the sibling payment-method
lookup, and the per-status counts the two tabs share with the event's other tabs.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
