The chevron up/down buttons rewrote a single row's display_order,
which didn't actually swap positions since the neighbouring rows kept
their original orders. Replaced with a proper drag-handle (dnd-kit
sortable, matching the waiting-list-manager pattern) backed by a new
POST /admin/qualification-criteria/reorder endpoint that rewrites
display_order = index for every row in a transaction. The service
rejects partial / extraneous id lists so a stale UI can't silently
drop a criterion. Optimistic local-cache update keeps the row in
position during the round-trip; rollback on error.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Matt
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