- Undo Vessel→Cost Centre rename in admin (admin shows "Vessel Management" again)
- Sidebar: "Cost Centres"→"Vessels", "Accounts"→"Accounting Codes"
- PO forms (new/edit/import/manager-edit) now show both Vessels (with code) and Sites in the
Cost Centre dropdown, encoded as v:<id> / s:<id> via a costCentreRef field
- vesselId on PurchaseOrder is now nullable; siteId is set when a site is the cost centre
- History, approvals, dashboard, my-orders, payments display vessel.name ?? site.name as Cost Centre
- History and approvals cost centre filters use costCentreRef URL param supporting both types
- Admin vessel form: adds Site assignment dropdown
- Admin accounts: renamed to "Accounting Code" throughout (pages, forms, sidebar)
- PO detail and exports: "Account" label renamed to "Accounting Code"
- Site detail: "Assigned Vessels (Cost Centres)" heading; vessel detail breadcrumb fixed
- Create PO links from vessel/site detail use ?costCentreRef= param
- Export routes handle costCentreRef filter param (with legacy vesselId fallback)
- DB migration: ALTER TABLE PurchaseOrder ALTER COLUMN vesselId DROP NOT NULL
- CLAUDE.md updated with Cost Centre Model documentation
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
