/color-audit: Color System Audit

Focused audit of the project's color system.

Flow

1. Extract all colors with uiux_extract_colors
2. Map color roles (primary, secondary, neutral, semantic, surface, text)
3. Check contrast ratios for all foreground/background pairs with uiux_check_contrast
4. Evaluate harmony, consistency, coverage, dark mode
5. Generate improved color system with uiux_generate_palette
6. Output light + dark mode palettes with token values

Output