chore(backlog): 记录 g68 完成

.ua/backlog.json

@@ -900,6 +900,14 @@
       "acceptance": "TagProps 增加 checkable/checked/onChange；渲染为 button + aria-pressed，effect 同步 class 不整块重渲染；选中态低视觉比重（accent 10% 底 + 55% 边框），hover 上浮、按压回缩、focus-visible 光环并带 reduced-motion 兜底；文档与演示补齐；npm run check 全绿",
       "status": "done",
       "notes": "自补：组件增强；checkable 与 closable 互斥（同时传以 checkable 为准），checked 不传则内部自持"
+    },
+    {
+      "id": "g68",
+      "title": "alert 增加语义图标与通栏形态",
+      "motivation": "提示条只有文字，语义强度全靠颜色（色弱不可辨）；顶部通知也做不出通栏效果，得靠调用方套壳改样式",
+      "acceptance": "AlertProps 增加 banner/showIcon/icon；图标纯装饰 aria-hidden 不干扰读屏播报；is-banner 去圆角、只留下边框、通栏 padding；文档 props 与手把手补齐；npm run check 全绿",
+      "status": "done",
+      "notes": "自补：组件增强；图标用字符而非外部图标集，避免引入依赖，颜色走 currentColor 跟随语义档"
     }
   ]
 }

.ua/iterations.log

@@ -112,3 +112,4 @@
 {"ts":"2026-10-26T12:32:31+08:00","id":"g65","result":"done","commit":"b7824f7","summary":"verify 新增文档 props 必须落到实现源码的校验（幽灵字段直接报错），并补齐 image/textField/textarea/pagination 四处漏记字段"}
 {"ts":"2026-10-26T12:34:27+08:00","id":"g66","result":"done","commit":"805b54d","summary":"verify 反向解析 types.ts 的 Props 字段并与文档 props 表双向比对，清单新增 propsType 覆盖接口名，补齐 form.onReset"}
 {"ts":"2026-10-26T12:36:19+08:00","id":"g67","result":"done","commit":"cc3c649","summary":"tag 增加 checkable 筛选片：button + aria-pressed 与信号双向绑定，选中态走 accent 淡底，不整块重渲染"}
+{"ts":"2026-10-26T12:37:22+08:00","id":"g68","result":"done","commit":"99981fe","summary":"alert 增加 showIcon/icon 语义图标（aria-hidden 纯装饰）与 banner 通栏形态，补齐文档与演示"}