chore(backlog): 记录 g164 完成

.ua/backlog.json

@@ -1668,6 +1668,14 @@
       "acceptance": "verify 新增：backlog id 不重复、g 编号严格递增、同一 id 只能有一条 done 留痕、留痕 ts 必须带 +08:00、时间线不回退、不落在未来（5 分钟容差）；AGENTS.md 与 verify 成功文案同步；负向注入（复制条目 + 手写无偏移时间戳）四类错误全部报出，复原后全绿。",
       "notes": "",
       "status": "done"
+    },
+    {
+      "id": "g164",
+      "title": "描述列表支持竖排与标题操作区",
+      "motivation": "详情页右侧窄栏里，字段名横排会把值挤成两三行断字；标题行想放个「刷新 / 更新时间」也没位置——只能在外面另拼一个 flex 头。",
+      "acceptance": "descriptions 新增 layout（vertical 把字段名挪到值上方，bordered 时自动去掉标签分隔线与底纹）与 extra（标题行右侧内容）；演示页加竖排 + 操作区实例；manifest props 表与步骤、llms-full 同步；npm run check 全绿。",
+      "notes": "",
+      "status": "done"
     }
   ]
 }

.ua/iterations.log

@@ -208,3 +208,4 @@
 {"ts":"2026-10-26T16:05:06+08:00","id":"g161","result":"done","commit":"0bcf73f","summary":"notification 支持 key 复用与 update 原地改标题/描述/语义色"}
 {"ts":"2026-10-26T16:07:27+08:00","id":"g162","result":"done","commit":"fe78275","summary":"verify 新增暗色令牌校验（颜色必覆盖、反向查多余变量），ua tokens 标注缺暗色"}
 {"ts":"2026-10-26T16:08:23+08:00","id":"g163","result":"done","commit":"6febeba","summary":"verify 补 backlog 编号递增/去重与留痕 ts 时区、单调、未来三类校验"}
+{"ts":"2026-10-26T16:09:59+08:00","id":"g164","result":"done","commit":"b533903","summary":"descriptions 新增 layout=vertical 与 extra 标题插槽"}