digital-garbageandClaude Sonnet 5.5
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Lane sizes and the window margin become tokens; toolbars wrap by default; windows are capped to the viewport; a ratchet test stops element CSS gaining literal pixel sizes. app/e2e runs the real app in Chromium and Firefox at eight screen sizes (npm run test:viewport). docs/ui-design-guidelines.md gains "Responsive by construction". Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>