ui bug fixers

Frontend/erp-system/lib/api/vendors.ts

@@ -1,6 +1,6 @@
 // One typed client method per vendor (supplier) endpoint (docs/11-BACKEND-PHASE1.md
-// §2.4, FR-MD-06). ETag/If-Match on update, PATCH status for deactivate (masters are
-// deactivated, not hard-deleted, FR-MD-08).
+// §2.4, FR-MD-06). ETag/If-Match on update, PATCH status for deactivate, DELETE for a
+// hard delete (409 MASTER_IN_USE while any purchase document or item references it).
 import { apiRequest, apiRequestWithETag, buildQuery } from "@/lib/api-client"
 import { ApiResult, EntityStatus, PagedResponse } from "@/types/common"
 import { CreateVendorRequest, UpdateVendorRequest, Vendor } from "@/types/master-data"
@@ -33,4 +33,8 @@ export const vendorsApi = {
   updateStatus(vendorId: number, status: EntityStatus): Promise<void> {
     return apiRequest<void>(`/vendors/${vendorId}/status`, { method: "PATCH", body: { status } })
   },
+
+  delete(vendorId: number): Promise<void> {
+    return apiRequest<void>(`/vendors/${vendorId}`, { method: "DELETE" })
+  },
 }