task-119(任务与重复分析中心): 实现重复检查导入/导出状态

新增 duplicate-import-export.ts：导入结果摘要/导入参数归一与导出查询构建。

TDD: task-119.test.ts 8 用例先 RED 后 GREEN。

admin-frontend-vue/src/pages/tasks/duplicate-import-export.ts

@@ -0,0 +1,71 @@
+/** 重复检查导入/导出（任务 119）：导入结果摘要、导入参数与导出查询构建；纯逻辑。
+ * 导出走 GET /duplicate-check-export 直接下载 CSV，导入 POST /duplicate-check-import(multipart)。 */
+import { unwrap } from '../../api/envelope.ts'
+import type { DuplicateFilter } from './duplicate-filter.ts'
+
+/** 导出端点路径(供下载 URL 构造)。 */
+export const DUPLICATE_EXPORT_PATH = '/duplicate-check-export'
+
+function count(value: unknown): number {
+  return typeof value === 'number' && Number.isFinite(value) ? Math.floor(value) : 0
+}
+
+export type DuplicateImportMode = 'add' | 'delete'
+
+/** 导入模式归一：delete/del/remove → delete，其余按 add。 */
+export function normalizeImportMode(mode: unknown): DuplicateImportMode {
+  const text = typeof mode === 'string' ? mode.trim().toLowerCase() : ''
+  return text === 'delete' || text === 'del' || text === 'remove' ? 'delete' : 'add'
+}
+
+export interface DuplicateImportResult {
+  totalRows: number
+  asinCount: number
+  mode: DuplicateImportMode
+}
+
+/** 导入结果摘要解析(data: {total_rows, asin_count, ...})。 */
+export function parseDuplicateImportResult(payload: unknown): DuplicateImportResult {
+  const data = unwrap<unknown>(payload)
+  const record = data && typeof data === 'object' ? (data as Record<string, unknown>) : {}
+  return {
+    totalRows: count(record.total_rows ?? record.totalRows),
+    asinCount: count(record.asin_count ?? record.asinCount),
+    mode: normalizeImportMode(record.mode),
+  }
+}
+
+/** 导入查询参数(multipart 外的固定参数)。 */
+export function toDuplicateImportQuery(input: {
+  mode?: unknown
+  shopName?: string
+  countryCodes?: readonly string[]
+}): { mode: DuplicateImportMode; shop_name?: string; country_codes?: string } {
+  const query: { mode: DuplicateImportMode; shop_name?: string; country_codes?: string } = {
+    mode: normalizeImportMode(input.mode),
+  }
+  const shopName = typeof input.shopName === 'string' ? input.shopName.trim() : ''
+  if (shopName) query.shop_name = shopName
+  const countryCodes = Array.isArray(input.countryCodes)
+    ? input.countryCodes.map((code) => String(code).trim()).filter(Boolean)
+    : []
+  if (countryCodes.length) query.country_codes = countryCodes.join(',')
+  return query
+}
+
+/** 导出查询参数(不含分页，直接下载 CSV)。 */
+export function toDuplicateExportQuery(filter: DuplicateFilter): Record<string, string> {
+  const query: Record<string, string> = {}
+  const put = (key: string, value: string) => {
+    const text = value.trim()
+    if (text) query[key] = text
+  }
+  put('view', filter.view)
+  put('asin', filter.asin)
+  put('shop_name', filter.shopName)
+  put('country', filter.country)
+  put('site', filter.site)
+  put('date_from', filter.dateFrom)
+  put('date_to', filter.dateTo)
+  return query
+}

admin-frontend-vue/tests/task-119.test.ts

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+import test from 'node:test'
+import assert from 'node:assert/strict'
+import { readSource } from './helpers.ts'
+import {
+  normalizeImportMode,
+  parseDuplicateImportResult,
+  toDuplicateExportQuery,
+  toDuplicateImportQuery,
+} from '../src/pages/tasks/duplicate-import-export.ts'
+
+test('test_task_119_duplicate_import_export_normal_primary_path', () => {
+  // 正常主路径：导入结果摘要解析。
+  const summary = parseDuplicateImportResult({
+    success: true,
+    data: { total_rows: 120, asin_count: 45, mode: 'add' },
+  })
+  assert.equal(summary.totalRows, 120)
+  assert.equal(summary.asinCount, 45)
+  assert.equal(summary.mode, 'add')
+})
+
+test('test_task_119_duplicate_import_export_normal_variant_input', () => {
+  // 正常变体：导入参数归一(delete)。
+  assert.equal(normalizeImportMode('DEL'), 'delete')
+  assert.equal(normalizeImportMode('add'), 'add')
+  assert.deepEqual(toDuplicateImportQuery({ mode: 'add', shopName: '店', countryCodes: ['DE', 'UK'] }), {
+    mode: 'add',
+    shop_name: '店',
+    country_codes: 'DE,UK',
+  })
+})
+
+test('test_task_119_duplicate_import_export_repeated_is_idempotent', () => {
+  // 正常重复：导出查询构建稳定、不改输入。
+  const filter = { view: 'monitor', asin: 'A', shopName: '', country: 'DE', site: '', dateFrom: '', dateTo: '' }
+  assert.deepEqual(toDuplicateExportQuery(filter), toDuplicateExportQuery(filter))
+})
+
+test('test_task_119_duplicate_import_export_boundary_empty_input', () => {
+  // 边界空值：无模式按 add；空 country 不下发。
+  assert.equal(normalizeImportMode(''), 'add')
+  const q = toDuplicateImportQuery({ mode: 'x', shopName: '', countryCodes: [] })
+  assert.equal(q.mode, 'add')
+  assert.equal('country_codes' in q, false)
+})
+
+test('test_task_119_duplicate_import_export_boundary_single_item', () => {
+  // 边界单元素：单国家导出。
+  const query = toDuplicateExportQuery({ view: '', asin: '', shopName: '', country: 'DE', site: '', dateFrom: '', dateTo: '' })
+  assert.equal(query.country, 'DE')
+})
+
+test('test_task_119_duplicate_import_export_boundary_limit_or_missing_field', () => {
+  // 边界上限/缺字段：导入结果缺省字段回 0。
+  const summary = parseDuplicateImportResult({ data: {} })
+  assert.equal(summary.totalRows, 0)
+  assert.equal(summary.asinCount, 0)
+})
+
+test('test_task_119_duplicate_import_export_invalid_input_rejected', () => {
+  // 异常输入：success=false 抛后端 message。
+  assert.throws(() => parseDuplicateImportResult({ success: false, message: '请上传 Excel 文件' }), /请上传 Excel 文件/)
+})
+
+test('test_task_119_duplicate_import_export_dependency_failure_returns_actionable_message', () => {
+  // 依赖失败/可操作：导入导出纯逻辑；导出走 GET /duplicate-check-export。
+  const mod = readSource('src/pages/tasks/duplicate-import-export.ts')
+  assert.equal(/axios|http\.|vue/.test(mod), false, '导入导出保持纯逻辑')
+  assert.match(mod, /duplicate-check-export/)
+})