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- modal/_validateField: set aria-invalid on invalid inputs so screen readers announce field errors; login.js mirrors this for username/password fields - color pickers (notes, calendar): wrap swatches in role="radiogroup" with aria-labelledby, add aria-checked per swatch, localized aria-labels instead of hex values, roving tabindex with Arrow/Enter/Space keyboard navigation - nav badges: badge spans get aria-hidden="true"; nav link aria-label updated to include overdue count (tasks) or pending reminder count (reminders) - router: remove aria-live from <main> (caused full page re-reads on nav); add dedicated #route-announcer sr-only region with aria-live=polite + aria-atomic, announces page label 50ms after render completes Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>