Add layout system (sidebar, header, main layout), dark/light/system theme with HSL customization, 3 ambient backgrounds (mesh gradient, particle field, aurora), Cmd/Ctrl+K search dialog, page transitions, card hover effects, status pulse animations, skeleton loaders, and responsive design. Polish all existing pages with consistent theming.
Add admin layout with auth guard, user management (CRUD + group membership), group management, system settings (auth mode, registration, theme, healthcheck), permission editor component, and global search API endpoint.
alexei.dolgolyov