chore(backlog): 记录 g48 完成

.ua/backlog.json

@@ -740,6 +740,14 @@
       "acceptance": "新增 cascader（多列联动、悬停下钻、点击提交、changeOnSelect、全键盘、Esc 入栈）；manifest/docs/demo/README/计数同步；npm run check 全绿",
       "status": "done",
       "notes": "自补：组件补充；浏览路径与已提交路径分离，避免悬停污染受控值"
+    },
+    {
+      "id": "g48",
+      "title": "新增 splitter 可拖拽分栏容器",
+      "motivation": "仪表盘/IDE 式布局需要可调整比例的分栏，库内没有任何布局基础件，调用方只能自己写拖拽与边界夹逼",
+      "acceptance": "新增 splitter（指针拖拽、键盘微调、双击复位、min 夹逼、sizes 信号受控、横纵两向）；manifest/docs/demo/README/计数同步；npm run check 全绿",
+      "status": "done",
+      "notes": "自补：布局基础件；两栏之和恒定，只改相邻一对"
     }
   ]
 }

.ua/iterations.log

@@ -92,3 +92,4 @@
 {"ts":"2026-10-26T12:02:16+08:00","id":"g45","result":"done","commit":"0a0dc7a","summary":"overlay 新增 lockScroll 引用计数，模态层全关才还原 body 滚动"}
 {"ts":"2026-10-26T12:08:17+08:00","id":"g46","result":"done","commit":"1fe76e2","summary":"新增 transfer 穿梭框：两栏按 targetKeys 派生、逐栏搜索、全选含半选、禁用条目不参与，组件数 44→45"}
 {"ts":"2026-10-26T12:10:25+08:00","id":"g47","result":"done","commit":"d81b724","summary":"新增 cascader 级联选择：多列联动/悬停下钻/点击提交/changeOnSelect/全键盘，浏览路径与已提交路径分离，组件数 45→46"}
+{"ts":"2026-10-26T12:11:45+08:00","id":"g48","result":"done","commit":"d7bfabb","summary":"新增 splitter 可拖拽分栏：指针拖拽+方向键微调+双击复位+min 夹逼+横纵两向，组件数 46→47"}