- Tailwind CSS: toolbar checkbox injects Play CDN into preview, persisted
per-fiddle via new options JSON column
- Markdown mode: uses marked.js CDN, renders markdown to HTML preview with
CSS tab for custom styling
- WASM mode: starter template with inline WebAssembly add function, supports
top-level await via module detection
- npm imports: auto-detect bare import specifiers in module code and inject
importmap pointing to esm.sh CDN
- Module auto-detection for html-css-js mode (import/export statements)
- DB migration adds options column, server passes through all API endpoints
- All features work across preview, export, and embed
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