Reworks the T&C feature per review:
- categories are user-defined DATA, not a fixed enum — admins add new ones;
- ALL PO T&Cs are catalogued, incl. the previously-fixed boilerplate (seeded
under a "General" category) and an "Others" bucket;
- the PO form is a dynamic editor: "+ Add term", pick a category, type/pick a
clause.
- schema: TermsCategory (name/sortOrder/isActive) + TermsCondition (categoryId
FK + text + isDefault + isActive). PurchaseOrder.terms Json snapshot. Migration
seeds every standard line as a clause (named slots, the two fixed lines under
General, empty Others); isDefault rows pre-fill new POs.
- admin /admin/terms: Add/Edit clause form's category is a combobox — typing a
new name creates the category; isDefault checkbox.
- PO editor components/po/po-terms-editor.tsx: dynamic rows (category + clause
comboboxes), used by new/edit/manager-edit forms; new POs pre-fill from
getDefaultPoTerms, edits load po.terms or legacyPoTerms (old tc* + fixed lines).
- storage: PurchaseOrder.terms ([{category,text}]) supersedes tc* for export +
detail; null on old POs falls back to tc* + fixed lines. parsePoTerms validates.
- export route + po-detail render from terms when present.
- tests rewritten for category creation + catalogue/default helpers.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>