chore(backlog): 记录 g289 完成

.ua/backlog.json

@@ -2987,6 +2987,15 @@
       "status": "done",
       "domain": "tooling",
       "notes": ""
+    },
+    {
+      "id": "g289",
+      "title": "tooltip 出场期间跟随滚动重算翻转",
+      "motivation": "气泡是 wrap 内的绝对定位，滚动时跟着触发器走没问题；问题在翻转判定——flipSide 拿的是视口几何，只在出场那一瞬算一次。用户滚一下页面，原本「朝上放不下所以朝下」的判断可能已经反过来，气泡就压在视口边上；反过来也一样。这是只在滚动后才显形的错位，代码评审很容易漏过。",
+      "acceptance": "出场期间挂 scroll（捕获阶段，容器滚动不冒泡）+ resize 监听，rAF 节流重算 flipSide；收起时立即摘监听（关闭态不空转），重复出场不重复绑定；tooltip 文档 steps 补该行为；npm run check 全绿",
+      "status": "done",
+      "domain": "tune",
+      "notes": ""
     }
   ]
 }

.ua/iterations.log

@@ -333,3 +333,4 @@
 {"ts":"2026-10-26T23:16:30+08:00","id":"g286","result":"done","commit":"85812ab","summary":"新增 noticeBar 单行通知条（语义色 + 符号 + 跑马灯 + 关闭，减少动效停成静态），组件数 86→87"}
 {"ts":"2026-10-26T23:17:28+08:00","id":"g287","result":"done","commit":"f388464","summary":"noticeBar 关闭先淡出再隐藏（减少动效只淡出），窄屏改换行停跑马灯，demo 文案据实修正"}
 {"ts":"2026-10-26T23:18:19+08:00","id":"g288","result":"done","commit":"003dae3","summary":"verify 的 steps 下限 3→4 并在报错里点明四步口径，badge/divider/kbd/highlight 补真实第四条，AGENTS 两处同步"}
+{"ts":"2026-10-26T23:19:03+08:00","id":"g289","result":"done","commit":"8dc7201","summary":"tooltip 出场期间挂 scroll(捕获)/resize 监听，rAF 节流重算翻转，收起即摘"}