chore(backlog): 记录 g110 完成

.ua/backlog.json

@@ -1243,7 +1243,7 @@
       "motivation": "筛选项一旦选中就回不到「未选」：城市、负责人这类可选筛选的下拉没有清空出口，用户只能刷新页面或换一个值。textField 早有 clearable，select 一直没有对应能力",
       "acceptance": "SelectProps 新增 clearable（缺省 false）：有值时触发器右缘出现 ×，点它把值写成空串并回调 onChange('')；收起态按 Delete / Backspace 等价清空；按钮不进 Tab 序、无值自动隐藏；文档参数表 / 手把手 / api 说明与演示（城市下拉开启清空）同步；npm run check 全绿",
       "notes": "自补：可用性；复用既有 value 信号与 onChange，不新增状态",
-      "status": "open"
+      "status": "done"
     }
   ]
 }

.ua/iterations.log

@@ -154,3 +154,4 @@
 {"ts":"2026-10-26T13:59:52+08:00","id":"g107","result":"done","commit":"48f9465","summary":"新增 popconfirm 二次确认气泡（popover 补受控 open），组件 58→59"}
 {"ts":"2026-10-26T14:01:11+08:00","id":"g108","result":"done","commit":"5601e59","summary":"form 提交失败统计不通项数，顶部 role=alert 汇总条 + onError(count)"}
 {"ts":"2026-10-26T14:02:01+08:00","id":"g109","result":"done","commit":"1bf35da","summary":"tooltip 触摸屏改为按下即出、抬手延迟 1.2s 收，鼠标/键盘路径不变"}
+{"ts":"2026-10-26T14:03:25+08:00","id":"g110","result":"done","commit":"e042143","summary":"select 新增 clearable：有值显 ×（Delete/Backspace 亦可清），复位到未选态"}