2026-07-04 — v22 annotation lanes + dark-mode accessibility

July 4, 2026

This pass closes two UX gaps from the redesign workstream: annotation lanes now behave like a true contextual track (not a shell when no trace exists), and color/focus tokens are verified with measured contrast assertions instead of visual guesswork.

What changed

Contextual annotation lanes: ORF/restriction lanes remain hidden until trace context exists, then render with exact fixture-backed chip values and jump behavior.
Accessibility token hardening: introduced a dedicated --color-focus-ring token with a visible 3px ring, strengthened border tokens for non-text contrast, and desaturated dark-mode blue accents while preserving hierarchy.
Measured contrast tests: added genuine computed-ratio assertions in E2E for helper text (≥4.5:1) and UI border/focus indicators (≥3.0:1) across both light and dark themes.

Validation

npm run typecheck
npm run lint
npm run test
npm run test:e2e