feat(textarea): 响应式地触发 autosize 样式计算 #1175
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🤔 这个 PR 的性质是？
🔗 相关 Issue
💡 需求背景和解决方案
在移动端/小屏幕可能存在以下场景：
textarea 会被 Sticky 之类的组件始终固定在页面，假如输入的内容过多，会需要使用 autosize 的功能，方便编辑和查看。但假如离开了 textarea 则想关闭 autosize 的功能，恢复到默认的
calcTextareaHeight(textareaRef.value as HTMLTextAreaElement, 1, 1);高度，以获得更多空间显示其他内容。📝 更新日志
feat(Textarea): 支持
autosize属性值变更后输入框高度重新计算本条 PR 不需要纳入 Changelog
☑️ 请求合并前的自查清单