The admin events page fetched every event on each load and rendered
them all, which grows without bound as the archive fills up. GET
/api/events now takes optional page and pageSize parameters and returns
total alongside the rows; pagination is opt-in, so the public pages and
the admin filter dropdowns that pass neither still get the full list
and the untouched response shape.
Page size is selectable (10/25/50/100) and deleting the last event on a
page falls back to the new last page instead of showing an empty table.
The ?edit=<id> deep link no longer depends on the target being in the
current page: when it is missing from the loaded rows the event is
fetched directly, guarded by a ref so the modal opens once.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
