RealRyte Admin Menu v2.5
- Replaced embedded Luxu sidebar/background SVG wordmark with RealRyte.
- Replaced legacy web/logo.svg with RealRyte branding.
- Changed visible theme name Luxu to RealRyte while preserving internal theme value compatibility.
- Kept internal luxu_admin event/database namespaces unchanged for compatibility.
- Keeps v2.4 /rradmin command and working keybind behavior.
