- Inline <script> in <head> applies edp_theme from localStorage before first
paint — no flash of unstyled content
- Bootstrap 5.3 data-bs-theme + custom data-edp-theme attribute for overrides
- Dark palette mirrors portal (bg #0d1117, surface #161b22, card #1c2128,
accent-blue #388bfd, text #e6edf3, borders #30363d)
- CSS tokens for both themes via :root and [data-edp-theme='dark']
- All Bootstrap components overridden in dark mode: cards, tables, forms,
modals, alerts, breadcrumbs, code, badges, inputs
- Moon/sun toggle button in topbar; sun shown in dark mode, moon in light
- Shared localStorage key 'edp_theme' — setting persists across all EDP apps
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