task-118(任务与重复分析中心): 实现重复检查详情抽屉

duplicate-model.ts 增加 DuplicateDetail 解析与详情分页负载解析，duplicate-api.ts
增加 fetchDuplicateDetail(GET /duplicate-check-detail)。

TDD: task-118.test.ts 8 用例先 RED 后 GREEN。

admin-frontend-vue/src/pages/tasks/duplicate-api.ts

@@ -1,6 +1,11 @@
 /** 店铺数据重复检查适配（任务 115-119）：/api/admin/shop-data-crawl/duplicate-check-* 系列端点。 */
 import { http } from '@/api/http'
-import { parseDuplicateItemsPage, parseDuplicateOverview, type DuplicateOverview } from './duplicate-model.ts'
+import {
+  parseDuplicateDetailPage,
+  parseDuplicateItemsPage,
+  parseDuplicateOverview,
+  type DuplicateOverview,
+} from './duplicate-model.ts'
 import { toDuplicateItemsQuery, type DuplicateFilter } from './duplicate-filter.ts'
 
 export const DUPLICATE_CHECK_ENDPOINT = '/api/admin/shop-data-crawl'
@@ -24,3 +29,15 @@ export async function fetchDuplicateItems(
   })
   return parseDuplicateItemsPage(data)
 }
+
+/** 加载撞款详情卡片分页：GET /duplicate-check-detail。 */
+export async function fetchDuplicateDetail(
+  filter: DuplicateFilter,
+  page: number,
+  pageSize: number,
+): Promise<ReturnType<typeof parseDuplicateDetailPage>> {
+  const { data } = await http.get<unknown>(`${DUPLICATE_CHECK_ENDPOINT}/duplicate-check-detail`, {
+    params: toDuplicateItemsQuery(filter, page, pageSize),
+  })
+  return parseDuplicateDetailPage(data)
+}

admin-frontend-vue/src/pages/tasks/duplicate-model.ts

@@ -139,6 +139,60 @@ function parseDuplicateMetrics(raw: unknown): DuplicateMetrics | null {
   }
 }
 
+/** 撞款详情卡(抽屉)：跨店聚合一张卡片。 */
+export interface DuplicateDetail {
+  asin: string
+  shopCount: number
+  recordCount: number
+  shopNames: string[]
+  brand: string
+  firstDate: string
+  occurrences: DuplicateOccurrence[]
+}
+
+/** 解析单张撞款详情卡；缺 asin 视为无效。 */
+export function parseDuplicateDetail(raw: unknown): DuplicateDetail | null {
+  if (!raw || typeof raw !== 'object') return null
+  const r = raw as Record<string, unknown>
+  const asin = text(r.asin)
+  if (!asin) return null
+  const shopNamesRaw = r.shop_names ?? r.shopNames
+  const shopNames = Array.isArray(shopNamesRaw)
+    ? (shopNamesRaw as unknown[]).map((name) => text(name)).filter(Boolean)
+    : []
+  return {
+    asin,
+    shopCount: count(r.shop_count ?? r.shopCount),
+    recordCount: count(r.record_count ?? r.recordCount),
+    shopNames,
+    brand: text(r.brand),
+    firstDate: text(r.first_date ?? r.firstDate),
+    occurrences: Array.isArray(r.occurrences)
+      ? r.occurrences.map((occ) => parseDuplicateOccurrence(occ)).filter((occ): occ is DuplicateOccurrence => occ !== null)
+      : [],
+  }
+}
+
+/** 详情分页负载(data: {pending,items,total,page,page_size}) → 前端结果。 */
+export function parseDuplicateDetailPage(payload: unknown): {
+  pending: boolean
+  items: DuplicateDetail[]
+  total: number
+  page: number
+  pageSize: number
+} {
+  const core = unwrap<unknown>(payload)
+  const record = core && typeof core === 'object' ? (core as Record<string, unknown>) : {}
+  const items = Array.isArray(record.items)
+    ? record.items.map((raw) => parseDuplicateDetail(raw)).filter((detail): detail is DuplicateDetail => detail !== null)
+    : []
+  const total = count(record.total)
+  const pageNumber = count(record.page) >= 1 ? count(record.page) : 1
+  const rawSize = record.page_size ?? record.pageSize
+  const pageSize = count(rawSize) >= 1 ? count(rawSize) : 20
+  return { pending: record.pending === true, items, total, page: pageNumber, pageSize }
+}
+
 /** 明细列表分页负载(data: {pending,items,total,page,page_size}) → 前端结果。 */
 export function parseDuplicateItemsPage(payload: unknown): {
   pending: boolean