Renders a graph element as a pre-styled HTML box. Reach for this inside
<Paper renderElement={...}> when you want elements that already look good
without writing any CSS.
Wraps HTMLHost and adds the jj-box class, which themes the box
through --jj-box-* CSS variables (background, border, radius, padding,
font). Like HTMLHost, it measures its content and syncs the size back
to the element by default; set useModelGeometry to size it from the model
instead. All props reach the underlying HTMLHost; className is merged
with the jj-box class and style is layered on top of the default box
styling, while the rest pass through unchanged. Use HTMLHost directly
when you want a blank host with no default styling.