Tufte 1.15.8

Backlinks polish, both sides of the theme/plugin seam:

• Mention snippets keep the Tufte highlight voice — a ==highlight== inside a sidebar backlink mention now renders as red ink, not the browser's default yellow ground (the sidebar pane sits outside the preview containers the highlight rule covered).
• Code blocks in rendered mentions hold snippet size — a scoped insulation rule keeps the theme's own pre sizing (kept for the language-label geometry) from shrinking a mention's code block to ~8px.

Plugin zips updated: Tufte Backlinks 1.0.1 (mention snippets dedent so nested lists — including to-dos — render as proper lists instead of indented code blocks; stylesheet freed of !important per community guidelines). Figures 1.7.0, Inline 1.2.0, Sidenotes 1.7.0 unchanged apart from manifest metadata (descriptions ≤250 chars, profile authorUrl).