refactor(finance): 清理 legacy_platform 的展示与死查询

- 未归一组统计默认渠道补上 third_party_voucher，移除已无数据的 legacy_platform
- 前端移除历史归档/历史平台的类型与标签
- 保留后端口径的 legacy_platform→archived 筛选别名，旧链接不报错

apps/backend/src/services/cost-center/product-catalog-service.ts

@@ -655,7 +655,9 @@ export async function getAdminChannelMappingDiagnostics(payload: JsonObject = {}
     }
   }
 
-  const modes = channel ? [channel] : ['work_order', 'affiliate_dash', 'legacy_platform', 'manual']
+  const modes = channel
+    ? [channel]
+    : ['work_order', 'affiliate_dash', 'third_party_voucher', 'manual']
   // 顺序跑：并行会同时扫 cost_exceptions，实测 4 路并发比串行更慢（I/O 争抢）。
   const aggregates: Array<{ groupTotal: number; itemTotal: number }> = []
   for (const mode of modes) {
@@ -705,7 +707,9 @@ export async function listAdminUnmappedMappingGroups(payload: JsonObject = {}) {
 
   // 分组总数单独算：SQL 守卫禁止窗口函数分页（会在 LIMIT 前消费全部候选行）。
   // 按履约方式拆开统计：命中索引，单模式约 90ms；「全部」时顺序跑四种模式。
-  const modes = channel ? [channel] : ['work_order', 'affiliate_dash', 'legacy_platform', 'manual']
+  const modes = channel
+    ? [channel]
+    : ['work_order', 'affiliate_dash', 'third_party_voucher', 'manual']
   const totals: Array<{ groupTotal: number; itemTotal: number }> = []
   for (const mode of modes) {
     const totalParams = [...params, mode]

apps/frontend/src/pages/admin/AdminSalesProfitPage.tsx

@@ -48,7 +48,6 @@ const FULFILLMENT_MODE_LABEL: Record<string, string> = {
   work_order: '接单平台',
   affiliate_dash: '自动发货',
   third_party_voucher: '第三方卡券',
-  legacy_platform: '历史归档',
   manual: '人工客服',
   archived: '历史归档',
   unclassified: '未分类',

apps/frontend/src/pages/admin/cost-center/CostExceptionPanel.tsx

@@ -40,7 +40,6 @@ import { CostPreviewModal } from './CostPreviewModal'
 const FULFILLMENT_MODE_TAG_COLORS: Record<string, string> = {
   work_order: 'blue',
   affiliate_dash: 'green',
-  legacy_platform: 'default',
   manual: 'orange',
 }
 

apps/frontend/src/pages/admin/cost-center/CostPreviewModal.tsx

@@ -19,7 +19,6 @@ import { costModelLabel, providerLabel } from './shared'
 const FULFILLMENT_MODE_LABELS: Record<string, string> = {
   work_order: '接单平台',
   affiliate_dash: '自动发货',
-  legacy_platform: '历史平台',
   manual: '人工客服',
 }
 

apps/frontend/src/pages/admin/cost-center/shared.ts

@@ -129,7 +129,6 @@ export const FULFILLMENT_MODE_LABELS: Record<string, string> = {
   work_order: '接单平台',
   affiliate_dash: '自动发货',
   third_party_voucher: '第三方卡券',
-  legacy_platform: '历史归档',
   manual: '人工客服',
   archived: '历史归档',
   unclassified: '未分类',
@@ -139,7 +138,6 @@ export const FULFILLMENT_MODE_COLORS: Record<string, string> = {
   work_order: 'blue',
   affiliate_dash: 'green',
   third_party_voucher: 'cyan',
-  legacy_platform: 'default',
   manual: 'orange',
   archived: 'default',
   unclassified: 'gold',

apps/frontend/src/types/admin/cost-center.ts

@@ -1,13 +1,7 @@
 /**
- * 履约渠道：v2 唯一真源是 order_items.fulfillment_channel；
- * legacy_platform 仅历史数据兜底显示。
+ * 履约渠道：唯一真源是 order_items.fulfillment_channel + fulfillment_status。
  */
-export type FulfillmentChannel =
-  | 'work_order'
-  | 'affiliate_dash'
-  | 'third_party_voucher'
-  | 'legacy_platform'
-  | 'manual'
+export type FulfillmentChannel = 'work_order' | 'affiliate_dash' | 'third_party_voucher' | 'manual'
 
 /** 商品来源：由 canonical_sku 前缀推导，空串表示未分类。 */
 export type ProductSource = 'affiliate_dash' | 'work_order' | 'third_party_voucher' | 'manual' | ''

apps/frontend/src/types/admin/orders.ts

@@ -12,7 +12,6 @@ export type AdminOrderItemFulfillmentMode =
   | 'work_order'
   | 'affiliate_dash'
   | 'third_party_voucher'
-  | 'legacy_platform'
   | 'manual'
   | 'pending'
   | 'archived'

apps/frontend/src/utils/admin-display.ts

@@ -223,7 +223,6 @@ export function resolveOrderFulfillmentMode(row: {
     | 'work_order'
     | 'affiliate_dash'
     | 'third_party_voucher'
-    | 'legacy_platform'
     | 'manual'
     | 'pending'
     | 'archived'