fix: refresh active purge progress without idle delay

components/admin/MaterialPurgeStatus.test.tsx

@@ -15,9 +15,13 @@ test('刷新后重新接管的清理任务也显示完成结果', async () => {
     .mockImplementation(() => response({ jobs: [{ ...job, status: 'completed', processedFiles: 2 }] }))
   await act(async () => { render(<Fixture />) })
   expect(screen.getByText('正在清理 1 条素材')).toBeInTheDocument()
-  await act(async () => { jest.advanceTimersByTime(3000) })
+  await act(async () => { jest.advanceTimersByTime(499) })
+  expect(fetch).toHaveBeenCalledTimes(1)
+  await act(async () => { jest.advanceTimersByTime(1) })
   expect((fetch as jest.Mock).mock.calls[1][0]).toContain(`id=${id}`)
   expect(screen.getByText('已彻底删除 1 条')).toBeInTheDocument()
+  await act(async () => { jest.advanceTimersByTime(2500) })
+  expect(fetch).toHaveBeenCalledTimes(2)
 })
 
 test('后台进度轮询成功不能抹掉人工重试失败的提示', async () => {

components/admin/MaterialPurgeStatus.tsx

@@ -52,10 +52,16 @@ export function useMaterialPurgeJobs() {
   useEffect(() => {
     mounted.current = true
     void refresh()
-    const timer = setInterval(() => { if (!document.hidden) void refresh() }, 3000)
-    return () => { mounted.current = false; clearInterval(timer) }
+    return () => { mounted.current = false }
   }, [refresh])
 
+  const hasPending = jobs.some(job => job.status === 'queued' || job.status === 'processing')
+  const pollMs = hasPending && !error ? 500 : 3000
+  useEffect(() => {
+    const timer = setInterval(() => { if (!document.hidden) void refresh() }, pollMs)
+    return () => clearInterval(timer)
+  }, [refresh, pollMs])
+
   const retry = async (id: string) => {
     setRetrying(id)
     setRetryError(null)

docs/回收站删除索引修复-2026-10-09.md

@@ -8,6 +8,8 @@
 
 提交后立即唤醒已经启动的清理 worker。空队列检查与入队交错时保留唤醒信号，每轮满 20 条立即接着处理下一轮；5 秒定时器只用于恢复和到期重试。没有把排队或未完成的物理清理显示成成功。
 
+前端只在任务进行中且进度接口正常时每 500ms 更新状态，完成后及接口报错时回到 3 秒间隔；页面隐藏时停止请求，已有请求未完成时不重叠请求。完成提示仍由服务端真实完成状态驱动，避免后台已经完成但界面固定多等 3 秒。
+
 ## 验证
 
 - 21 个相关 Jest 测试，包括入队与空队列检查交错时不会丢失唤醒。