Share the technical implementation of Markdown export and publish copy in CodeWF.Markdown and Vex: MarkdownDocumentExporter, ExportKind, shared image loading, SVG/GIF/WebP rasterization, Word embedded media resources, selectable text PDF, Windows CF_HTML rich HTML clipboard, and extensible typography themes.
生成 UUID v4 或 Nil UUID，适合测试数据、临时标识和分布式唯一 ID。