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- Unify Saturday+Sunday into single isWeekend flag (header + grid lines) - Replace hardcoded amber vacation bar/tooltip colors with brand-* classes - Add global accent-color for checkboxes and radio buttons via CSS variable - Update VACATION_TIMELINE_COLORS/BORDER to use brand palette (SICK stays red) - Vacation-only tooltip uses neutral dark surface with brand accent border Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>