- 优化字号检测逻辑,向上遍历 DOM 树查找第一个明确设置的 fontSize 元素 - 从 baseStyle 中提取默认字号作为后备值,支持 pt/px 单位转换 - 实现光标位置字号设置功能,插入占位符 span 确保用户输入时使用新字号 - 添加 handleInput 时的占位符清理逻辑,移除零宽空格并移除数据属性 - 完善 RichTextToolbar 组件的字号状态管理和选区状态处理 - 传递 baseStyle 属性到工具栏组件,提高字号设置的准确性和一致性
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