- Apply webapp/module.webapp.md: CSS variable block (verbatim), W1 app shell
(header with meta slots, left nav rail >=904px, stacked below), 38em measure.
- Colours and type from tokens only; part colours mapped to dv tokens.
- Controls per catalog: one primary button, secondary/quiet variants, verb-first
labels <=8 chars, 44px hit areas, 3px focus ring with 2px offset.
- Theme: system / light / dark, choice persisted (try/catch); prefers-reduced-motion.
- Part attributes shown as a specsheet in the tooltip and in the rail; keyboard
part picker added for non-pointer users.
Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A5Cun3RHQKna9qxE6ybZ4A