diff --git a/admin-frontend-vue/src/pages/asin/dedupe-import-api.ts b/admin-frontend-vue/src/pages/asin/dedupe-import-api.ts
new file mode 100644
index 00000000..36774479
--- /dev/null
+++ b/admin-frontend-vue/src/pages/asin/dedupe-import-api.ts
@@ -0,0 +1,13 @@
+/** 去重汇总导入启动适配（任务 65）：multipart POST /import(file+groupId) → importId。 */
+import { http } from '@/api/http'
+import { parseDedupeImportStart } from './dedupe-import-model'
+
+export const DEDUPE_IMPORT_ENDPOINT = '/api/admin/dedupe-total-data/import'
+
+export async function startDedupeImport(file: File, groupId: number): Promise<string> {
+  const form = new FormData()
+  form.append('file', file, file.name)
+  form.append('groupId', String(groupId))
+  const { data } = await http.post<unknown>(DEDUPE_IMPORT_ENDPOINT, form)
+  return parseDedupeImportStart(data)
+}
diff --git a/admin-frontend-vue/src/pages/asin/dedupe-import-model.ts b/admin-frontend-vue/src/pages/asin/dedupe-import-model.ts
new file mode 100644
index 00000000..6204f542
--- /dev/null
+++ b/admin-frontend-vue/src/pages/asin/dedupe-import-model.ts
@@ -0,0 +1,18 @@
+/** 去重汇总导入模型（任务 65）：启动结果解析 + xlsx 文件校验，纯逻辑。 */
+import { unwrap } from '../../api/envelope.ts'
+
+export const DEDUPE_IMPORT_ALLOWED_EXT = /\.(xlsx|xls)$/i
+
+/** 是否为允许导入的 Excel 文件。 */
+export function isAllowedImportFile(fileName: unknown): boolean {
+  return typeof fileName === 'string' && DEDUPE_IMPORT_ALLOWED_EXT.test(fileName.trim())
+}
+
+/** 解包导入启动结果并取回 importId；缺省抛可读错误。 */
+export function parseDedupeImportStart(payload: unknown): string {
+  const data = unwrap<unknown>(payload)
+  const record = data && typeof data === 'object' ? (data as Record<string, unknown>) : null
+  const importId = typeof record?.importId === 'string' ? record.importId.trim() : ''
+  if (!importId) throw new Error('导入任务响应异常：缺少任务 ID')
+  return importId
+}
diff --git a/admin-frontend-vue/tests/task-65.test.ts b/admin-frontend-vue/tests/task-65.test.ts
new file mode 100644
index 00000000..b331fbcb
--- /dev/null
+++ b/admin-frontend-vue/tests/task-65.test.ts
@@ -0,0 +1,55 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+import { readSource } from './helpers.ts'
+import { isAllowedImportFile, parseDedupeImportStart } from '../src/pages/asin/dedupe-import-model.ts'
+
+test('test_task_065_dedupe_import_start_normal_primary_path', () => {
+  // 正常主路径：启动结果 {importId} 解析出任务 id。
+  assert.equal(parseDedupeImportStart({ success: true, data: { importId: 'job_123' } }), 'job_123')
+})
+
+test('test_task_065_dedupe_import_start_normal_variant_input', () => {
+  // 正常变体：已解包对象直传同样解析。
+  assert.equal(parseDedupeImportStart({ importId: 'job_456' }), 'job_456')
+})
+
+test('test_task_065_dedupe_import_start_normal_repeated_operation_is_idempotent', () => {
+  // 正常重复：解析纯函数稳定。
+  const payload = { success: true, data: { importId: 'job_abc' } }
+  assert.equal(parseDedupeImportStart(payload), parseDedupeImportStart(payload))
+})
+
+test('test_task_065_dedupe_import_start_boundary_empty_input', () => {
+  // 边界空值：缺 importId → 可读错误。
+  assert.throws(() => parseDedupeImportStart({ success: true, data: {} }), /导入任务/)
+  assert.throws(() => parseDedupeImportStart({}), /导入任务/)
+})
+
+test('test_task_065_dedupe_import_start_boundary_single_item', () => {
+  // 边界单元素：.xlsx 文件名合法。
+  assert.equal(isAllowedImportFile('import.xlsx'), true)
+})
+
+test('test_task_065_dedupe_import_start_boundary_limit_or_missing_field', () => {
+  // 边界上限：非 xlsx(xls 允许)被拒；空文件名被拒。
+  assert.equal(isAllowedImportFile('data.csv'), false)
+  assert.equal(isAllowedImportFile('data.xls'), true)
+  assert.equal(isAllowedImportFile(''), false)
+  assert.equal(isAllowedImportFile(undefined as never), false)
+})
+
+test('test_task_065_dedupe_import_start_invalid_input_rejected', () => {
+  // 异常输入：success=false 抛后端 message。
+  assert.throws(() => parseDedupeImportStart({ success: false, message: '文件不合法或缺少 ASIN 列' }), /文件不合法/)
+})
+
+test('test_task_065_dedupe_import_start_dependency_failure_returns_actionable_message', () => {
+  // 依赖失败/导入走 adapter：multipart POST /import(file+groupId)，页面不内联。
+  const api = readSource('src/pages/asin/dedupe-import-api.ts')
+  assert.match(api, /startDedupeImport/)
+  assert.match(api, /http\.post/)
+  assert.match(api, /\/import/)
+  assert.match(api, /FormData/)
+  const mod = readSource('src/pages/asin/dedupe-import-model.ts')
+  assert.equal(/axios|http\./.test(mod), false, '导入模型保持纯逻辑')
+})