toolkit: add MarkdownView read-only document renderer#12
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The read-only document widget the toolkit lacked. Renders a Markdown subset that maps cleanly onto the fixed-width bitmap font: ATX headings, bullet lists, fenced code blocks, and blank-line-separated paragraphs, word-wrapped to the widget width. Hierarchy comes from layout (Accent underline on H1/H2, bullet markers with hanging indent, SurfaceAlt code bands) since the 5x7 font has one weight/size. Block parser is a pure, independently-tested function. 100% coverage. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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The read-only document widget the toolkit lacked. Renders a Markdown subset that maps cleanly onto the fixed-width bitmap font: ATX headings (
#..######), bullet lists (-/*/+), fenced code blocks (```), and blank-line-separated paragraphs — word-wrapped to the widget width.Since the 5x7 font has a single weight and size, hierarchy is shown through layout rather than type scale: headings get an Accent underline (levels 1-2) and Accent ink, bullets get a
•marker with a hanging indent, code blocks sit on a SurfaceAlt band. The block parser (parseMarkdown) is a pure, independently-tested function.Renders through
painter.Painter. 100% coverage;go vetclean; builds on all 6 arches + js/wasm.🤖 Generated with Claude Code