chore(backlog): 记录 g18 完成

.ua/backlog.json

@@ -506,7 +506,7 @@
       "title": "textField 可清空按钮",
       "motivation": "长文本输入后逐字删除太慢，主流输入框都提供 clearable 一键清空",
       "acceptance": "clearable 开启后有值时显示清空按钮，点击清空并同步信号与 onInput；空值自动隐藏；npm run check 全绿",
-      "status": "open",
+      "status": "done",
       "notes": "自补：既有组件可用性细节"
     }
   ]

.ua/iterations.log

@@ -62,3 +62,4 @@
 {"ts":"2026-10-26T10:55:35+08:00","id":"g15","result":"done","commit":"85988f0","summary":"toast 悬停暂停倒计时、移出按剩余时长继续，长文案不再来不及读"}
 {"ts":"2026-10-26T10:58:01+08:00","id":"g16","result":"done","commit":"a036b0a","summary":"image 加载失败自动替换虚线占位块，fallback 可自定义文案，demo 附失效地址示例"}
 {"ts":"2026-10-26T11:00:20+08:00","id":"g17","result":"done","commit":"27d797a","summary":"select 展开后键入字母按前缀环形快跳选项，1s 无输入重置缓冲，既有键盘导航不变"}
+{"ts":"2026-10-26T11:04:02+08:00","id":"g18","result":"done","commit":"44b8697","summary":"textField clearable 开启后有值即显一键清空按钮，点击同步信号与 onInput，空值自动隐藏"}