The selection attributes for a surface container, ready to spread onto the element — e.g.
<div {...themeSurfaceProps('grid', 'dark')}>. mode is optional: omit it to inherit the ancestor's
mode via the CSS cascade; pass it when the region flips mode (a light grid in a dark app), which selects
the compound [mode][surface] cell.
The selection attributes for a surface container, ready to spread onto the element — e.g.
<div {...themeSurfaceProps('grid', 'dark')}>.modeis optional: omit it to inherit the ancestor's mode via the CSS cascade; pass it when the region flips mode (a light grid in a dark app), which selects the compound[mode][surface]cell.