refactor(fulfillment): 固化 91 中文名→英文 SKU 权威映射表

91 继续用中文编码；解析优先查内置常量表，配置仅作临时覆盖，Admin 改为展示权威表。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/backend/src/services/admin/platform-config/affiliate-dash-service.ts

@@ -2,6 +2,11 @@ import { getAffiliateDashConfig } from '../../platforms/affiliate-dash/config.js
 import type { JsonObject } from '../../../types/json.js'
 import { getAffiliateDashWallet } from '../../platforms/affiliate-dash/order-service.js'
 import { listAffiliateDashProducts } from '../../platforms/affiliate-dash/product-service.js'
+import {
+  AFFILIATE_DASH_SKU_MAPPING,
+  mergeAffiliateDashSkuMapping,
+} from '../../platforms/affiliate-dash/sku-mapping.js'
+import { matchAffiliateDashSku } from '../../fulfillment/product-resolution-service.js'
 import {
   getAffiliateDashSourceConfig,
   hasAffiliateDashConfig,
@@ -15,6 +20,7 @@ export function getAdminAffiliateDashConfig() {
 
   return {
     source,
+    builtinSkuMapping: { ...AFFILIATE_DASH_SKU_MAPPING },
     effective: mapEffectiveAffiliateDashConfig(effective),
   }
 }
@@ -25,15 +31,17 @@ export async function updateAdminAffiliateDashConfig(payload: JsonObject = {}) {
 
   return {
     source: saved,
+    builtinSkuMapping: { ...AFFILIATE_DASH_SKU_MAPPING },
     effective: mapEffectiveAffiliateDashConfig(effective),
   }
 }
 
-/** 按 91 商品编码（productNo）测试 sku 映射命中。 */
+/** 按 91 商品编码（productNo）测试 sku 映射命中（权威表 + 增量覆盖，含归一化）。 */
 export function matchAdminAffiliateDashSku(payload: JsonObject = {}) {
   const productNo = String(payload.productNo || payload.product_no || '').trim()
   const source = getAdminEditableAffiliateDashConfig()
-  const sku = productNo ? String(source.skuMapping[productNo] || '').trim() : ''
+  const mapping = mergeAffiliateDashSkuMapping(source.skuMapping)
+  const sku = productNo ? matchAffiliateDashSku(mapping, productNo) : ''
 
   return {
     productNo,
@@ -72,6 +80,8 @@ function mapEffectiveAffiliateDashConfig(config: ReturnType<typeof getAffiliateD
     hasAppKey: Boolean(config.appKey),
     hasAppSecret: Boolean(config.appSecret),
     hasCallbackSecret: Boolean(config.callbackSecret),
-    skuMappingCount: Object.keys(config.skuMapping).length,
+    skuMappingCount: Object.keys(mergeAffiliateDashSkuMapping(config.skuMapping)).length,
+    builtinSkuMappingCount: Object.keys(AFFILIATE_DASH_SKU_MAPPING).length,
+    overlaySkuMappingCount: Object.keys(config.skuMapping || {}).length,
   }
 }