- Replace Tailwind color classes with CSS variables in all dashboard components
- HealthStatusCard: Use CSS variables for success/warning/error colors
- ActionQueueCard: Full dark mode support with CSS variable-based colors
- ProductionTimelineCard: Dark mode colors + filter for PENDING/ON_HOLD with today's start date
- All skeleton loaders now use theme-aware background colors
- Components adapt automatically to light/dark theme changes
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