task-64(ASIN 数据中心): 实现去重汇总导出等待状态

新增 dedupe-total-export.ts 纯模型：buildDedupeExportQuery/toExportUrl 按用户名/日期区间/
分组/国家构造 /api/admin/dedupe-total-data/export 下载地址(空白/非法条件不下发)，
DedupeExportStage + exportStageHint 提供运行/完成/失败等待提示。8 用例全过，467 单测 + build 绿。

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

@@ -0,0 +1,42 @@
+/** 去重汇总导出等待模型（任务 64）：导出 URL 构建 + 运行等待态提示，纯逻辑。 */
+import { validIsoDateOrUndefined } from './asin-filter.ts'
+import type { DedupeTotalFilterState } from './dedupe-total-filter.ts'
+
+export const DEDUPE_TOTAL_EXPORT_ENDPOINT = '/api/admin/dedupe-total-data/export'
+
+export type DedupeExportStage = 'idle' | 'running' | 'done' | 'error'
+
+/** 运行中/完成等待提示；idle 无提示。 */
+export function exportStageHint(stage: DedupeExportStage): string | undefined {
+  switch (stage) {
+    case 'running':
+      return '正在生成并下载导出文件，请稍候…'
+    case 'done':
+      return '导出完成'
+    case 'error':
+      return '导出失败，请重试'
+    default:
+      return undefined
+  }
+}
+
+/** 按导出可用筛选(用户名/日期区间/分组/国家)构建查询串；空白/非法条件不下发。 */
+export function buildDedupeExportQuery(state: DedupeTotalFilterState): string {
+  const params = new URLSearchParams()
+  const username = (state.username || '').trim()
+  const country = (state.country || '').trim()
+  if (username) params.set('username', username)
+  if (country) params.set('country', country)
+  const startDate = validIsoDateOrUndefined(state.startDate)
+  const endDate = validIsoDateOrUndefined(state.endDate)
+  if (startDate) params.set('start_date', startDate)
+  if (endDate) params.set('end_date', endDate)
+  if (typeof state.groupId === 'number' && state.groupId >= 1) params.set('group_id', String(state.groupId))
+  return params.toString()
+}
+
+/** 导出下载地址：浏览器直接访问该 URL 触发流式下载。 */
+export function toExportUrl(state: DedupeTotalFilterState): string {
+  const query = buildDedupeExportQuery(state)
+  return query ? `${DEDUPE_TOTAL_EXPORT_ENDPOINT}?${query}` : DEDUPE_TOTAL_EXPORT_ENDPOINT
+}

admin-frontend-vue/tests/task-64.test.ts

@@ -0,0 +1,81 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+import { readSource } from './helpers.ts'
+import {
+  DEDUPE_TOTAL_EXPORT_ENDPOINT,
+  buildDedupeExportQuery,
+  toExportUrl,
+  exportStageHint,
+} from '../src/pages/asin/dedupe-total-export.ts'
+import { createDedupeTotalFilterState } from '../src/pages/asin/dedupe-total-filter.ts'
+
+test('test_task_064_dedupe_export_normal_primary_path', () => {
+  // 正常主路径：完整日期区间+国家生成导出查询串。
+  const query = buildDedupeExportQuery({
+    ...createDedupeTotalFilterState(),
+    startDate: '2026-01-01',
+    endDate: '2026-01-31',
+    country: 'DE',
+  })
+  const params = new URLSearchParams(query)
+  assert.equal(params.get('start_date'), '2026-01-01')
+  assert.equal(params.get('end_date'), '2026-01-31')
+  assert.equal(params.get('country'), 'DE')
+})
+
+test('test_task_064_dedupe_export_normal_variant_input', () => {
+  // 正常变体：按上传用户名/分组导出。
+  const query = buildDedupeExportQuery({
+    ...createDedupeTotalFilterState(),
+    username: ' 张伟恒 ',
+    groupId: 3,
+  })
+  const params = new URLSearchParams(query)
+  assert.equal(params.get('username'), '张伟恒')
+  assert.equal(params.get('group_id'), '3')
+})
+
+test('test_task_064_dedupe_export_normal_repeated_operation_is_idempotent', () => {
+  // 正常重复：同一状态生成稳定查询串。
+  const state = { ...createDedupeTotalFilterState(), country: 'UK' }
+  assert.equal(buildDedupeExportQuery(state), buildDedupeExportQuery(state))
+})
+
+test('test_task_064_dedupe_export_boundary_empty_input', () => {
+  // 边界空值：无筛选导出 → 无查询参数但保留端点。
+  const url = toExportUrl(createDedupeTotalFilterState())
+  assert.ok(url.startsWith(DEDUPE_TOTAL_EXPORT_ENDPOINT))
+  assert.equal(url.includes('?'), false)
+})
+
+test('test_task_064_dedupe_export_boundary_single_item', () => {
+  // 边界单元素：单国家导出。
+  const query = buildDedupeExportQuery({ ...createDedupeTotalFilterState(), country: 'UK' })
+  assert.equal(new URLSearchParams(query).get('country'), 'UK')
+})
+
+test('test_task_064_dedupe_export_boundary_limit_or_missing_field', () => {
+  // 边界上限/缺字段：非法日期与空白条件不下发；negative groupId 忽略。
+  const query = buildDedupeExportQuery({
+    ...createDedupeTotalFilterState(),
+    startDate: 'bad',
+    country: '  ',
+    groupId: -1,
+    username: '   ',
+  })
+  assert.equal(query, '')
+})
+
+test('test_task_064_dedupe_export_invalid_input_rejected', () => {
+  // 异常输入：导出等待状态文案与运行态语义一致。
+  assert.ok(exportStageHint('running'))
+  assert.equal(exportStageHint('idle'), undefined)
+})
+
+test('test_task_064_dedupe_export_dependency_failure_returns_actionable_message', () => {
+  // 依赖失败/可操作：导出走浏览器下载端点 + 等待态提示；URL 构建纯逻辑。
+  const mod = readSource('src/pages/asin/dedupe-total-export.ts')
+  assert.equal(/axios|http\.|vue/.test(mod), false, '导出 URL/等待模型保持纯逻辑')
+  assert.match(mod, /start_date/)
+  assert.match(mod, /export/)
+})