OptionalbedBuild-plate surface (#185); default { mode: 'none' } (bare grid).
OptionalboxOptionalboxOptionalgridOptionalgridOptionalshowShow the full build-volume wireframe cage (the box up to def.z). Default true. When
false, only the bed/plate (grid + surface + origin) shows — the cage is decoupled from the plate
(#306/#6), so a consumer can present the printable bed without the whole machine volume.
Themed styling (DD-009 D4, #153). Omitted fields keep the original constants; the origin tripod (semantic RGB axes) is never themed.