Markdown, LaTeX, and code highlighting

The note editor uses an extended CommonMark flavor: tables, task lists, footnotes, strikethrough, and fenced code blocks with syntax highlighting via highlight.js. Math is rendered by KaTeX.

Quick reference

• # Heading, **bold**, *italic*, ~~strike~~, `inline code`.
• Inline math: $E = mc^2$. Block math: $$\int_0^1 x\,dx$$.
• Code block: triple backticks followed by a language hint (ts, python, dart, sql, …).
• Checklist: - [ ] todo, - [x] done. These render as real checkboxes you can toggle.