Markdown 笔记

使用 HTML5、CSS3 和 JavaScript 构建一个功能丰富的 markdown 笔记应用。创建一个分屏界面，一侧是富文本编辑器，另一侧是实时 markdown 预览。实现完整的 markdown 语法支持，包括表格、带语法高亮的代码块和 LaTeX 公式。添加分层组织系统，包含嵌套分类、标签和收藏。包含强大的搜索功能，支持过滤器和内容索引。使用 localStorage，并提供可选的导出/导入用于数据备份。支持将笔记导出为 PDF、HTML 和 markdown 格式。实现可自定义的深色/浅色模式，并带有语法高亮主题。创建一个响应式布局，能够适应不同的屏幕尺寸，并带有可折叠面板。为所有常见操作添加快捷键以提升效率。包含自动保存功能，并带有版本历史和恢复选项。

Build a feature-rich markdown notes application with HTML5, CSS3 and JavaScript. Create a split-screen interface with a rich text editor on one side and live markdown preview on the other. Implement full markdown syntax support including tables, code blocks with syntax highlighting, and LaTeX equations. Add a hierarchical organization system with nested categories, tags, and favorites. Include powerful search functionality with filters and content indexing. Use localStorage with optional export/import for data backup. Support exporting notes to PDF, HTML, and markdown formats. Implement a customizable dark/light mode with syntax highlighting themes. Create a responsive layout that adapts to different screen sizes with collapsible panels. Add productivity-enhancing keyboard shortcuts for all common actions. Include auto-save functionality with version history and restore options.