A Markdown file starting with YAML front matter (agent SKILL.md files,
static site pages) showed it in the preview as a thematic break and a run
of text. The preview now shows every top-level field in a key / value
table above the body; nested lists and mappings keep their YAML layout.
Blocks after it keep their source lines for scroll sync. Text between two
thematic breaks that isn't a mapping is rendered as before.
Fixes#1239
Markdown from comments, hovers, agent replies and files renders into the IDE's own document, so a raw <style> restyled the whole IDE and <form> / style= reached the page. Every Markdown sanitizer (LSP hovers and comments, agent messages, Markdown preview) now forbids <style>, <form> and the style attribute; agent messages also drop data-* written in a reply, since their click handlers trust data-copy / data-path. align, width and <details> stay.
Closes#1319
Co-authored-by: ntbang0901 <[email protected]>
In Preview only the editor is display:none and the preview only followed it in the split layout, so Structure's Autoscroll to Source moved a hidden caret and Autoscroll from Source never saw the preview scroll. Caret moves without an edit now scroll a Preview-only preview to that line, and the preview publishes the source line on screen through editor/api (setShownLine/useShownLine) so Structure selects the heading being read; it is cleared when the editor comes back or the preview closes.
Fixes#977
Co-authored-by: jaw52 <[email protected]>
Fenced ```mermaid blocks in the Markdown preview render as diagrams. mermaid (12.1.0) is loaded lazily, only when a preview contains a diagram, with securityLevel "strict"; colours come from the theme tokens and diagrams re-render on theme changes. Syntax errors show inline under the source. Rendered diagrams are cached by theme + source, so editing elsewhere in the file doesn't redraw them.
Fixes#79
Claude-Session: https://claude.ai/code/session_01VUYsdXA2nkF5v6zsC93dpn
l0ng-ai
ntbang0901
Jaw