Optimized code structure, reduced unnecessary repeated readings

• 优化代码结构，减少不必要的重复读取

Filtered non-task nodes in the view (regular text not marked with any status symbols)

• 在视图中过滤非任务节点(不以任何状态符号标识的普通文本)

Fixed hierarchy not displaying in the active view

• 修复活跃视图未展示层级

For non-task text, use alt+q to format it as unstarted

• 对于非任务文本，使用alt+q进行格式化为未开始

Added task status color customization

• 添加任务状态颜色自定义功能

Fix empty files cannot be navigated

• 修复空文件无法打开的bug

• init