✨ feat(playground): add HTML preview tab to playground#1815
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Add a "Preview" tab that renders mq output as HTML in a sandboxed iframe, allowing users to see a live preview of the processed markdown. - Export `toHtml` and `htmlToMarkdown` from mq-web - Render preview with theme-aware styling (dark/light mode) - Use local mq-web package for development
- Remove allow-same-origin from sandbox to isolate srcdoc as null origin, preventing access to parent localStorage and cookies - Add Content-Security-Policy meta tag (default-src none, style-src unsafe-inline, img-src data: blob:) to block external resource loading
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Add a "Preview" tab that renders mq output as HTML in a sandboxed iframe, allowing users to see a live preview of the processed markdown.
toHtmlandhtmlToMarkdownfrom mq-web