Integrate ab_glyph-based font rendering with bundled Noto Sans fonts
(Regular, Bold, Italic, BoldItalic, Mono) to replace the fixed-width
text measurer in golden tests. Thread font-weight, font-style, and
font-family through the entire rendering pipeline: CSS parsing → style
computation → layout → display list → rasterizer.
Key changes:
- fonts crate: font database, shaper, and rasterizer with bundled fonts
- CSS: parse font-family (comma-separated lists), font-weight, font-style
- shared: FontWeight and FontStyle types
- style: font property inheritance and computation
- layout: ProportionalTextMeasurer using real font metrics
- display_list: font properties on Text items (conditional dump output)
- render: font-aware text drawing
- Golden tests regenerated with proportional font measurements
- New golden tests (137-141) for font weight, style, family, and headings
- Golden test regeneration infrastructure (regen_goldens.rs)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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