chore(backlog): 记录 g87 完成

.ua/backlog.json

@@ -1059,7 +1059,7 @@
       "motivation": "自动播放只在 pointerenter 暂停——键盘用户没有 hover，Tab 进轮播后幻灯片照样自己换页，正在读的内容被抽走（WCAG 2.2.2）；区域与幻灯片也只有笼统的 aria-label，读屏不知道这是轮播的第几张",
       "acceptance": "焦点进入（focusin）与移出（focusout）同样暂停自动播放，两者都不在才前进；区域补 aria-roledescription=轮播，每张补 aria-roledescription=幻灯片 且标签为「第 x 张，共 n 张」；演示描述同步；npm run check 全绿",
       "notes": "自补：无障碍；hover 与 focus 分开计数，避免一个 pointerleave 就误解除暂停",
-      "status": "open"
+      "status": "done"
     }
   ]
 }

.ua/iterations.log

@@ -131,3 +131,4 @@
 {"ts":"2026-10-26T13:02:41+08:00","id":"g84","result":"done","commit":"db5d38c","summary":"新增 columnResize 手柄：拖动/方向键改列宽、双击复位，定宽表头挂载"}
 {"ts":"2026-10-26T13:03:44+08:00","id":"g85","result":"done","commit":"bd64e43","summary":"progress 新增 label 可访问名与 variant 语义色，满格不回退 success"}
 {"ts":"2026-10-26T13:05:35+08:00","id":"g86","result":"done","commit":"a123140","summary":"overlay 新增 bindOutside，8 个弹层改用它，popover 删空 keydown"}
+{"ts":"2026-10-26T13:06:13+08:00","id":"g87","result":"done","commit":"cf4ec96","summary":"轮播 focusin/focusout 也暂停自动播放，区域与幻灯片补 aria-roledescription"}