Same tokens, sidebar shell, components and voice as Hammerhead: teal accent,
warm neutrals, status badges with text, dialogs with focus trapping that name
what they affect, empty states, skeleton loading, outline icons, 44px touch
targets and a slide-in drawer on phones. The strict CSP stays: no inline
styles or scripts, so icons and sizes use classes.
Adds docs/design.md and scripts/lint-design.mjs (run in CI), capitalizes
server error messages in one place, and rewrites interface copy to the voice
rules (sentence case, buttons that name the result, no dashes).
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
