feat: refine task and countdown interactions

frontend/e2e/ui-reduction-acceptance.spec.ts

@@ -193,8 +193,9 @@ test('Memo mobile search is one-row, focus-safe, persistent when collapsed, and
   await expect(toggle).toHaveAttribute('aria-expanded', 'false')
 
   await toggle.click()
+  const closeToggle = page.getByRole('button', { name: '收起搜索备忘录' })
   const input = page.getByRole('textbox', { name: '搜索备忘录' })
-  await expect(toggle).toHaveAttribute('aria-expanded', 'true')
+  await expect(closeToggle).toHaveAttribute('aria-expanded', 'true')
   await expect(input).toBeFocused()
   await input.fill(`保留查询-${testInfo.project.name}`)
   const openPanel = page.locator('#memo-search-panel')
@@ -207,7 +208,7 @@ test('Memo mobile search is one-row, focus-safe, persistent when collapsed, and
   expect(openMetrics.right).toBeLessThanOrEqual(page.viewportSize()!.width + 1)
   expect(openMetrics.scrollWidth).toBeLessThanOrEqual(openMetrics.clientWidth)
 
-  await toggle.click()
+  await closeToggle.click()
   await expect(openPanel).toBeHidden()
   await expect(toggle).toBeFocused()
   await expect(toggle).toHaveAttribute('aria-expanded', 'false')