chore(backlog): 记录 g23 完成

.ua/backlog.json

@@ -540,6 +540,14 @@
       "acceptance": "menu 展开时键入可打印字符循环聚焦 label 前缀匹配项（忽略大小写），1s 无输入重置；既有导航不变；npm run check 全绿",
       "status": "done",
       "notes": "自补：既有组件可用性细节"
+    },
+    {
+      "id": "g23",
+      "title": "tabs 键盘 Home/End 跳转",
+      "motivation": "页签多时方向键逐个移动太慢，与 select/menu 的 Home/End 行为对齐",
+      "acceptance": "tabs 聚焦时 Home 跳首个可用页签、End 跳末个可用页签并激活；方向键行为不变；npm run check 全绿",
+      "status": "done",
+      "notes": "自补：既有组件可用性细节；Home/End 直达首末启用页签，方向键环形逻辑不变"
     }
   ]
 }

.ua/iterations.log

@@ -67,3 +67,4 @@
 {"ts":"2026-10-26T11:08:38+08:00","id":"g20","result":"done","commit":"646fed9","summary":"inputNumber 长按 −/+ 400ms 后每 100ms 连发步进，松开或移出即停，单击不变"}
 {"ts":"2026-10-26T11:11:28+08:00","id":"g21","result":"done","commit":"c5a4a37","summary":"pagination jumpable 时末尾显示页码输入与总页数，回车跳转自动钳制范围"}
 {"ts":"2026-10-26T11:13:47+08:00","id":"g22","result":"done","commit":"9bef9d2","summary":"menu 展开后键入字母按前缀环形快跳菜单项，与 select 行为对齐"}
+{"ts":"2026-10-26T11:31:23+08:00","id":"g23","result":"done","commit":"9e8b435","summary":"tabs 聚焦时 Home/End 直达首个/末个启用页签并激活，方向键环形行为不变"}