chore(backlog): 记录 g95 完成

.ua/backlog.json

@@ -1123,7 +1123,7 @@
       "motivation": "活动剩余时间这类需求只能调用方自己 setInterval 改信号再塞进 statistic，还得自己管停表；组件本身只认一个数值信号，秒级刷新没有落脚点",
       "acceptance": "StatisticProps 新增 countdown（目标时间戳毫秒），传了即每秒显示 DD 天 HH:MM:SS（不足一天省天数），value 转为可选；到点或组件被移除后自动 clearInterval，不留常驻定时器；倒计时不走滚动动画；文档与演示同步；npm run check 全绿",
       "notes": "自补：功能补齐；停表条件放在 tick 内自检 isConnected，无需额外卸载钩子",
-      "status": "open"
+      "status": "done"
     }
   ]
 }

.ua/iterations.log

@@ -139,3 +139,4 @@
 {"ts":"2026-10-26T13:11:29+08:00","id":"g92","result":"done","commit":"ac5c5cd","summary":"badge 新增 count/max/dot 三形态，label 转可选，样式走令牌"}
 {"ts":"2026-10-26T13:12:28+08:00","id":"g93","result":"done","commit":"90bba1c","summary":"tree 新增 searchable：命中保留父链并临时展开，隐藏枝退出键盘遍历"}
 {"ts":"2026-10-26T13:13:08+08:00","id":"g94","result":"done","commit":"03eab7a","summary":"recipes 增补配方 5：数据表受控分页联动 + 导出全量行 + 列宽拖拽"}
+{"ts":"2026-10-26T13:14:05+08:00","id":"g95","result":"done","commit":"7e0612e","summary":"statistic 新增 countdown 模式：每秒 DD 天 HH:MM:SS，到点或卸载自动停表"}