- Parser extensions shared by the editor and the HTML renderer: ==highlight==, $inline math$
(Pandoc rules, so amounts like $5 are not math), $$ math blocks, footnote references and
definitions, [TOC], and YAML front matter
- Live preview: highlight, superscript/subscript, emoji names (gemoji), footnote references
with the definition as tooltip, a clickable table of contents, styled front matter
- Math (KaTeX) and Mermaid render in place; while editing a block the source is shown with a
live preview below. KaTeX, Mermaid and the emoji table are loaded only when a note uses them
- KaTeX is pinned to 0.18 so Mermaid shares the same copy
- Move editor focus tracking out of table.ts so block widgets and tables use the same state
eezd