chore(backlog): 记录 g08 完成

.ua/backlog.json

@@ -426,8 +426,8 @@
       "title": "新增 segmented 分段控制器组件",
       "motivation": "tabs 是页签语义（下划线 + 面板），视图 / 单位切换需要紧凑的胶囊分段控件；与 radioGroup 的差别是不承载表单语义",
       "acceptance": "新增 src/segmented.ts：options / value(信号双向) / size(sm|md) / disabled，滑块指示条随选中平移，←→ 键盘导航 + roving tabindex，选中态低视觉比重；导出 + manifest + demo sec-segmented + 文档同步；npm run check 全绿",
-      "status": "open",
-      "notes": "自补：组件补充方向"
+      "status": "done",
+      "notes": "API 为 options + value(必传信号) + size + disabled(布尔|信号) + onChange；滑块几何由 getBoundingClientRect 实测（减去容器 clientLeft 边框），挂载后 rAF 二次测量；←→ 环形导航 + 漫游 tabindex；整组禁用用 is-disabled 类 + 逐按钮 disabled；demo sec-segmented 用两个实例共用 range 信号演示联动"
     },
     {
       "id": "g09",

.ua/iterations.log

@@ -52,3 +52,4 @@
 {"ts":"2026-10-23T19:07:37+08:00","id":"g05","result":"done","commit":"9651c39","summary":"verify 内联重渲染 Agent 文档与 llms-full.txt 归一化比对，漂移即拦截提示 npm run docs"}
 {"ts":"2026-10-23T19:08:37+08:00","id":"g06","result":"done","commit":"b6c9489","summary":"checkCountDocs 扫描列表加入 README.md，三份文档组件计数文本全部纳入漂移门禁"}
 {"ts":"2026-10-26T10:17:59+08:00","id":"g07","result":"done","commit":"db96a30","summary":"新增 timeline 时间线组件：语义色节点 + 左右轴线 + pending 进行中节点，demo/manifest/README/llms-full 同步"}
+{"ts":"2026-10-26T10:20:58+08:00","id":"g08","result":"done","commit":"0e385cd","summary":"新增 segmented 分段控制器：胶囊分段 + 滑动滑块 + 键盘导航，manifest/README/llms-full 同步"}