ffb4318a1f
The admin events table didn't surface how many photos each event
contained — admins had to click into the event to find out. The
backend already computes `photo_count` for every row in the
GET /admin/events list response (adminEvents.js:794-796), so this
is a frontend-only display change.
- Insert a "Photos" column between Date and Status — groups with
the "what's in this event" info.
- Right-aligned, tabular-nums for clean numeric alignment in the
column.
- Reuses the existing `events.photos` i18n key already shipped in
all 5 locales for the EventDetailsPage tab list ("Fotos" / etc.) —
no new translations needed.
- Updates the empty-state colSpan from 7 to 8.
Closes the column-add half of #384. The bulk-delete request from
the same issue lands separately.