New EquipmentReservations component (listEquipmentReservations,
equipment.manage-gated) behind a per-item 'Reservations' toggle: shows
who reserved + time range + status, with a manager Cancel. Mirrors the
classes SessionAttendance pattern.
/equipment/manage (guarded by equipment.manage) lists equipment with
inline create/edit, status (available/maintenance/retired), an optional
required-certification picker, asset tag, archive/restore and delete
(refused once reservations exist). Sidebar gets a "Manage equipment"
link in the Admin block. Member browse/reserve is the next phase.