chore(backlog): 记录 g61 完成

.ua/backlog.json

@@ -844,6 +844,14 @@
       "acceptance": "新增 multiSelect（标签回显与删除、搜索过滤、点选不收起、max 禁用边界、↑↓/Enter/Esc、受控信号）；manifest/docs/demo/README/计数同步；npm run check 全绿",
       "status": "done",
       "notes": "自补：组件补充；输入框常驻不重建，避免重绘丢焦点"
+    },
+    {
+      "id": "g61",
+      "title": "tree 支持勾选多选与父子级联",
+      "motivation": "权限树、菜单授权这类场景必须多选；原来只有单选 selected，调用方只能自己拿 DOM 拼一套勾选逻辑",
+      "acceptance": "TreeProps 增加 multi/checked/onCheck；勾父选子、子全选回勾父、部分勾选半选、禁用项不参与级联；勾选不触发选中，多选下 Enter/空格切换勾选；manifest/docs/demo 同步；npm run check 全绿",
+      "status": "done",
+      "notes": "自补：既有组件增强；key→节点/父节点索引在建树时一次建立"
     }
   ]
 }

.ua/iterations.log

@@ -105,3 +105,4 @@
 {"ts":"2026-10-26T12:23:29+08:00","id":"g58","result":"done","commit":"7684ae2","summary":"新增 affix 固钉：阈值转 fixed + 外层等高占位防塌陷 + 宽度横向自适应，组件数 54→55"}
 {"ts":"2026-10-26T12:24:10+08:00","id":"g59","result":"done","commit":"9ef1b41","summary":"verify 检测 README 区块与分组行的重复组件项（整词计数），补齐文档漂移门禁"}
 {"ts":"2026-10-26T12:25:17+08:00","id":"g60","result":"done","commit":"dbdae9f","summary":"新增 multiSelect 多选下拉：标签回显/搜索/点选不收起/max 禁用边界/键盘导航，组件数 55→56"}
+{"ts":"2026-10-26T12:26:46+08:00","id":"g61","result":"done","commit":"f56ca51","summary":"tree 新增 multi 勾选：勾父选子、子全选回勾父、半选态、禁用项不参与级联，勾选不触发选中"}