3 changes in this update
Added localization support — the entire UI is now translated via s&box's localization system with English and 简体中文 available, ready for more languages later.
Added World Box controls — new sliders to adjust the simulation space size (Box X/Y/Z) and position (Center X/Y/Z), plus a "Fit 2D View" button to frame the camera.
Fixed physics in Infinite boundary mode — particles near opposite edges now correctly interact across the boundary (minimum-image convention), matching the binned simulation path.