chore(backlog): 记录 g292 完成

.ua/backlog.json

@@ -3014,6 +3014,15 @@
       "status": "done",
       "domain": "tune",
       "notes": ""
+    },
+    {
+      "id": "g292",
+      "title": "toast 溢出挤掉最早一条改走退场",
+      "motivation": "同屏满 4 条后第 5 条进来，最早那条是直接 remove()：凭空消失。而手动关闭 / 自动超时都是淡出后移除——同一类播报件在同一屏上有两种消失方式，g287 刚为 noticeBar 统一过这个口径，toast 这里是漏网的一处。",
+      "acceptance": "溢出时改调 dismiss()（摘 ua-open 触发过渡 + transitionend 与 320ms 兜底二选一），与手动关闭走同一条路径；toast 文档 steps 补堆叠上限与 duration: 0 常驻的用法；npm run check 全绿",
+      "status": "done",
+      "domain": "visual",
+      "notes": ""
     }
   ]
 }

.ua/iterations.log

@@ -336,3 +336,4 @@
 {"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"}
 {"ts":"2026-10-26T23:20:06+08:00","id":"g290","result":"done","commit":"9e72607","summary":"position.ts 新增 trackShift（捕获 scroll + resize、rAF 节流、可撤销帧），tooltip 改用它去掉内联重复，select 展开期间接上"}
 {"ts":"2026-10-26T23:20:55+08:00","id":"g291","result":"done","commit":"f88e57f","summary":"autoComplete/cascader/colorPicker/datePicker/timePicker/menu/multiSelect 七处弹层统一接 trackShift，收起即摘监听"}
+{"ts":"2026-10-26T23:21:30+08:00","id":"g292","result":"done","commit":"346d514","summary":"toast 满 4 条后最早一条改调 dismiss()（淡出后移除），与手动关闭同一条路径"}