chore(backlog): 记录 g117 完成

.ua/backlog.json

@@ -1299,7 +1299,7 @@
       "motivation": "tabs 的滑动指示条与 segmented 的滑块都只在「激活项变化」和挂载后一帧各量一次：窗口缩放、侧栏展开收起、字体调大之后，指示条宽度就停在旧值上，明显错位；这类「布局变了但没重算」的问题用户只会觉得组件坏了一半",
       "acceptance": "watch.ts 新增 trackSize(root, handler)：用 ResizeObserver 观察根节点尺寸，变化即回调，节点脱离文档时自查并断开（无 ResizeObserver 的环境回落成 window resize）；tabs / segmented 接入，指示条与滑块在容器变宽变窄后保持对齐；npm run check 全绿",
       "notes": "自补：正确性；与 watchViewport 同一处收口，后续布局敏感组件照抄",
-      "status": "open"
+      "status": "done"
     }
   ]
 }

.ua/iterations.log

@@ -161,3 +161,4 @@
 {"ts":"2026-10-26T14:07:17+08:00","id":"g114","result":"done","commit":"cb2601d","summary":"重新生成 CHANGELOG（301 提交），本次唤起 14 轮收尾"}
 {"ts":"2026-10-26T14:09:03+08:00","id":"g115","result":"done","commit":"c2900a4","summary":"新增 calendar 月历（marker 徽标进 aria-label），日期工具下沉 dateKit 与 datePicker 共用，组件 59→60"}
 {"ts":"2026-10-26T14:10:22+08:00","id":"g116","result":"done","commit":"2ab9406","summary":"drawer 新增 modal:false：透明遮罩不锁滚动不困焦点，页面可继续操作"}
+{"ts":"2026-10-26T14:11:13+08:00","id":"g117","result":"done","commit":"6cf4905","summary":"新增 trackSize（ResizeObserver 自断），tabs 指示条与 segmented 滑块随尺寸重算"}