task-62(ASIN 数据中心): 实现去重汇总列表查询

新增 dedupe-total-model.ts 纯解析 DedupeTotalDataPageVo(camel items/total/page/pageSize，
条目 dataValue/country/groupId/groupName/uploader/username/createdAt，缺 id 过滤)；
dedupe-total-api.ts fetchDedupeTotalList 复用共享筛选归一后 GET /api/admin/dedupe-total-data。
8 用例全过，451 单测 + build 绿。

admin-frontend-vue/src/pages/asin/dedupe-total-api.ts

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+/** 去重汇总列表查询适配（任务 62）：GET /api/admin/dedupe-total-data + 共享筛选归一。 */
+import { http } from '@/api/http'
+import { normalizeAsinPageParams, toAsinPageQuery, type AsinListParams } from './asin-filter'
+import { parseDedupeTotalPage, type DedupeTotalPageResult } from './dedupe-total-model'
+
+export const DEDUPE_TOTAL_ENDPOINT = '/api/admin/dedupe-total-data'
+
+export async function fetchDedupeTotalList(params: Partial<AsinListParams> = {}): Promise<DedupeTotalPageResult> {
+  const normalized = normalizeAsinPageParams(params)
+  const { data } = await http.get<unknown>(DEDUPE_TOTAL_ENDPOINT, { params: toAsinPageQuery(normalized) })
+  return parseDedupeTotalPage(data)
+}

admin-frontend-vue/src/pages/asin/dedupe-total-model.ts

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+/** 去重汇总列表查询模型（任务 62）：解析 DedupeTotalDataPageVo(camel)，纯逻辑。 */
+import { unwrap } from '../../api/envelope.ts'
+import { ASIN_PAGE_DEFAULT_SIZE, type AsinListParams } from './asin-filter.ts'
+
+export interface DedupeTotalItem {
+  id: number
+  dataValue: string
+  country: string
+  groupId: number | null
+  groupName: string
+  uploaderUserId: number | null
+  username: string
+  createdAt?: string
+}
+
+export interface DedupeTotalPageResult {
+  items: DedupeTotalItem[]
+  total: number
+  page: number
+  pageSize: number
+}
+
+export function emptyDedupeTotalPage(): DedupeTotalPageResult {
+  return { items: [], total: 0, page: 1, pageSize: ASIN_PAGE_DEFAULT_SIZE }
+}
+
+function text(value: unknown): string {
+  return typeof value === 'string' ? value.trim() : ''
+}
+
+function numberOrNull(value: unknown): number | null {
+  return typeof value === 'number' && Number.isFinite(value) ? Math.floor(value) : null
+}
+
+/** 解析单条去重总数据；缺 id 视为无效。 */
+export function toDedupeTotalItem(raw: unknown): DedupeTotalItem | null {
+  if (!raw || typeof raw !== 'object') return null
+  const record = raw as Record<string, unknown>
+  const id = numberOrNull(record.id)
+  if (id === null) return null
+  const item: DedupeTotalItem = {
+    id,
+    dataValue: text(record.dataValue ?? record.data_value),
+    country: text(record.country),
+    groupId: numberOrNull(record.groupId ?? record.group_id),
+    groupName: text(record.groupName ?? record.group_name),
+    uploaderUserId: numberOrNull(record.uploaderUserId ?? record.uploader_user_id),
+    username: text(record.username),
+  }
+  const createdAt = text(record.createdAt ?? record.created_at)
+  if (createdAt) item.createdAt = createdAt
+  return item
+}
+
+/** 归一化分页负载（信封或已解包 VO）为前端结果；缺省字段回默认。 */
+export function parseDedupeTotalPage(payload: unknown): DedupeTotalPageResult {
+  const out = emptyDedupeTotalPage()
+  const core = unwrap<unknown>(payload)
+  if (!core || typeof core !== 'object') return out
+  const record = core as Record<string, unknown>
+  if (Array.isArray(record.items)) {
+    out.items = record.items
+      .map((raw) => toDedupeTotalItem(raw))
+      .filter((item): item is DedupeTotalItem => item !== null)
+  }
+  if (typeof record.total === 'number') out.total = Math.floor(record.total)
+  if (typeof record.page === 'number' && record.page >= 1) out.page = Math.floor(record.page)
+  const rawSize = record.pageSize ?? record.page_size
+  if (typeof rawSize === 'number' && rawSize >= 1) out.pageSize = Math.floor(rawSize)
+  return out
+}
+
+/** 构造缺省分页查询参数（供初始加载使用）。 */
+export function emptyDedupePageParams(): Partial<AsinListParams> {
+  return { page: 1, pageSize: ASIN_PAGE_DEFAULT_SIZE }
+}