pelagia-portal/App/app/api/po/[id]/export
Hardik 0b10ba5e54
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feat(po): cancel POs (manager/superuser) + optional supersede link (#53)
Managers and superusers can cancel a PO from any state via a confirmation modal
that requires typing "cancel" and a mandatory reason. A cancelled PO becomes a
terminal CANCELLED state and drops out of every spend tracker/graph (those filter
on POST_APPROVAL_STATUSES / explicit whitelists, none of which include CANCELLED).

A cancelled PO may optionally be linked to the existing PO that supersedes it
(by PO number); the replacement shows the reciprocal "supersedes" link. No
vessel/account/vendor match is enforced and the link can be added any time.

Cancelled POs remain visible (greyed in history) and exportable, with a diagonal
"CANCELLED" watermark on both the PDF and XLSX exports.

- schema: POStatus CANCELLED; cancelledAt/cancellationReason; self-referential
  supersededById relation; ActionType CANCELLED/SUPERSEDED (+ migration)
- state machine canCancel(); cancel_po permission (MANAGER + SUPERUSER)
- cancelPo / supersedePo server actions + PO_CANCELLED notification
- cancel modal + supersede form; cancelled banner with reciprocal links
- exhaustive CANCELLED entries in all status label/variant maps
- diagonal CANCELLED watermark embedded for PDF (CSS) and XLSX (image)
- integration tests (cancel from any state, reason/role guards, supersede)

Inventory reversal on cancel is deferred to #55 (inventory is feature-flagged off).

Closes #53

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-21 12:20:54 +05:30
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route.ts feat(po): cancel POs (manager/superuser) + optional supersede link (#53) 2026-06-21 12:20:54 +05:30