CodeWF.Markdown: PDF text copyable, images embeddable, copying to WeChat Official Account/Zhihu/Juejin no longer shows HTML source code
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.