Added dark mode CSS to AI Administration (inc_ai_manager.php style block). Fixed: project cards had inline background-color:#F4F8FB creating bright white in dark mode — overridden with [data-bs-theme=dark] !important to var(--bs-secondary-bg). Portlet headings/bodies given dark bg vars. Domain billing cards, module cards, contact-card, widget-panel.bg-white, and card-box.border-ccc all given dark overrides. Text-dark forced to var(--bs-body-color) in dark mode. All 4 tabs verified with screenshots in both light and dark modes.