feat(douyin-mashida): 新增抖音券核销后台界面（列表/核销/冲正/同步/对账/作废）

抖音订单并非纯自动发货：内部 SKU 命中 AFFILIATE_DASH_SKU_MAPPING 才走自动通道，
未命中显式回落人工，且核销依赖买家自己到 /redeem 输订单号。此前核销侧在后台完全
不可见：自动核销是 void .catch(warn) 只落日志，cancelVerify 出网方法已就绪但没有入口。

照快手电子凭证的骨架做一套抖音版（两张表两套状态机，不复用）：
- 券码状态、平台侧状态、同步错误全部可视化，支持只看同步失败
- 核销/冲正/重新同步/平台对账/重发券码/作废，每个写操作都带审计
- 券码列显示「核销实际会用的券码」（platform_cert_no 优先），平台改过名时额外标注
- 冲正先打平台 cancelVerify 再回退本地，避免本地与平台状态漂移

apps/frontend/src/services/admin/douyin-mashida-certificate.ts

@@ -0,0 +1,72 @@
+import { apiGet, apiPost } from '@/lib/http'
+import type {
+  AdminDouyinMashidaCertificateActionPayload,
+  AdminDouyinMashidaCertificateCheckResult,
+  AdminDouyinMashidaCertificateInvalidateResult,
+  AdminDouyinMashidaCertificateListPayload,
+  AdminDouyinMashidaCertificateListResult,
+  AdminDouyinMashidaCertificateResendResult,
+  AdminDouyinMashidaCertificateSyncResult,
+  AdminDouyinMashidaCertificateVerifyResult,
+  AdminDouyinMashidaOrderDetailResult,
+} from '@/types/admin'
+
+/** 后台「抖音券核销」接口。与快手电子凭证（kuaishou-industry）是两套独立的表与状态机。 */
+const BASE = '/api/v1/admin/douyin-mashida'
+
+export function fetchAdminDouyinMashidaCertificates(
+  params: AdminDouyinMashidaCertificateListPayload = {},
+) {
+  return apiGet<AdminDouyinMashidaCertificateListResult>(
+    `${BASE}/certificates`,
+    params as Record<string, unknown>,
+  )
+}
+
+export function verifyAdminDouyinMashidaCertificate(
+  payload: AdminDouyinMashidaCertificateActionPayload,
+) {
+  return apiPost<AdminDouyinMashidaCertificateVerifyResult>(`${BASE}/certificates/verify`, payload)
+}
+
+export function cancelAdminDouyinMashidaCertificateVerify(
+  payload: AdminDouyinMashidaCertificateActionPayload,
+) {
+  return apiPost<AdminDouyinMashidaCertificateVerifyResult>(
+    `${BASE}/certificates/cancel-verify`,
+    payload,
+  )
+}
+
+export function syncAdminDouyinMashidaCertificate(
+  payload: AdminDouyinMashidaCertificateActionPayload,
+) {
+  return apiPost<AdminDouyinMashidaCertificateSyncResult>(`${BASE}/certificates/sync`, payload)
+}
+
+export function checkAdminDouyinMashidaCertificate(
+  payload: AdminDouyinMashidaCertificateActionPayload,
+) {
+  return apiPost<AdminDouyinMashidaCertificateCheckResult>(`${BASE}/certificates/check`, payload)
+}
+
+export function resendAdminDouyinMashidaCertificate(
+  payload: AdminDouyinMashidaCertificateActionPayload,
+) {
+  return apiPost<AdminDouyinMashidaCertificateResendResult>(`${BASE}/certificates/resend`, payload)
+}
+
+export function invalidateAdminDouyinMashidaCertificate(
+  payload: AdminDouyinMashidaCertificateActionPayload,
+) {
+  return apiPost<AdminDouyinMashidaCertificateInvalidateResult>(
+    `${BASE}/certificates/invalidate`,
+    payload,
+  )
+}
+
+export function fetchAdminDouyinMashidaOrderDetail(
+  payload: AdminDouyinMashidaCertificateActionPayload,
+) {
+  return apiPost<AdminDouyinMashidaOrderDetailResult>(`${BASE}/order-detail`, payload)
+}

apps/frontend/src/services/admin/index.ts

@@ -5,6 +5,7 @@ export * from './users'
 export * from './audit-logs'
 export * from './platform-config'
 export * from './kuaishou-industry'
+export * from './douyin-mashida-certificate'
 export * from './orders'
 export * from './tasks'
 export * from './dev-mock'