feat(downloads): expose pending export retry

src/modules/downloads/pages/DownloadCenterView.test.ts

@@ -30,7 +30,8 @@ const task: PlatformExportTask = {
   id: '9', taskNo: 'EXP9', exportType: 'CUSTOMER_LIST', format: 'XLSX', taskName: '客户列表',
   status: 'SUCCEEDED', totalRows: 12, processedRows: 12, fileName: '客户列表.xlsx',
   contentType: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', sizeBytes: 2048,
-  failureMessage: null, requestedBy: '1', requestedUsername: 'admin', requestedAt: '2026-08-03T10:00:00',
+  failureMessage: null, attemptCount: 1, maxAttempts: 3, nextRetryAt: null,
+  requestedBy: '1', requestedUsername: 'admin', requestedAt: '2026-08-03T10:00:00',
   startedAt: '2026-08-03T10:00:01', completedAt: '2026-08-03T10:00:02', expiresAt: '2026-08-10T10:00:02',
 }
 
@@ -85,7 +86,7 @@ describe('DownloadCenterView', () => {
     expect(URL.revokeObjectURL).toHaveBeenCalledWith('blob:export')
   })
 
-  it('shows retry only for failed tasks with the source export permission', async () => {
+  it('shows retry for failed tasks with the source export permission', async () => {
     vi.mocked(listPlatformExportTasks).mockResolvedValue({ records: [{ ...task, status: 'FAILED', failureMessage: 'IAM timeout' }], page: 1, size: 20, total: 1, pages: 1 })
     const pinia = setActivePinia(createPinia())
     const auth = useAuthStore()
@@ -102,6 +103,27 @@ describe('DownloadCenterView', () => {
     expect(retryPlatformExportTask).toHaveBeenCalledWith('9')
   })
 
+  it('shows waiting retry and allows an immediate retry during automatic backoff', async () => {
+    vi.mocked(listPlatformExportTasks).mockResolvedValue({
+      records: [{ ...task, status: 'PENDING', processedRows: 0, failureMessage: '头程服务查询失败', attemptCount: 2, nextRetryAt: '2026-09-03T10:34:28' }],
+      page: 1, size: 20, total: 1, pages: 1,
+    })
+    const pinia = setActivePinia(createPinia())
+    const auth = useAuthStore()
+    auth.token = 'token'
+    auth.permissions = ['platform:download:list', 'platform:customer:export']
+    useAccessPreviewStore().initializeAfterLogin()
+    mount(DownloadCenterView, { attachTo: document.body, global: { plugins: [pinia, ElementPlus] } })
+    await flushPromises()
+
+    expect(document.body.textContent).toContain('等待重试')
+    const retry = [...document.querySelectorAll<HTMLButtonElement>('button')]
+      .find((item) => item.textContent?.trim() === '立即重试')
+    retry?.click()
+    await flushPromises()
+    expect(retryPlatformExportTask).toHaveBeenCalledWith('9')
+  })
+
   it('labels and retries Finance tasks with their exact source export permission', async () => {
     const financeTask = {
       ...task,