- SupplierDeliveryNote model + enum DRAFT/SIGNED/CANCELLED in Prisma schema
- SDN service: create (atomic SDN + N receptions), sign (requires file, auto-verifies receptions), cancel (cascade)
- SDN routes: POST /, GET /, GET /:id, POST /:id/sign, POST /:id/cancel
- Guard on receptions.verify: refuses without linked signed УПД
- Receptions no longer auto-verify on create (ACHETEUR role) — verification goes through SDN sign
- Frontend: API client, UpdIncomingTab in Документооборот hub, SDN creation modal in PO drawer
- ReceptionsSection shows УПД column + "Оформить УПД" button alongside legacy "Приёмка без УПД"
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
louis
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