Standalone HTML exports no longer inline the UI control/view CSS — the
static snapshot, figure, and animated renderers now pack only the base +
token theme shell, dropping controls/*.css, views/*.css, and per-theme
overrides that styled controls those exports never render. In
delivery="cdn" the remaining theme CSS is referenced from jsDelivr via
<link> tags instead of being inlined; "inline"/"offline" keep inlining
the reduced set, and runtime-registered external themes fall back to inlining.