* 🐛 Align WASM auto-width text size with HTML measurement
Include the HTML paragraph-set 1px right margin in Skia auto-width
so WASM and DOM measurements match.
* ⚡ Scope and defer post-font WASM text relayout
Track pending font faces per shape, force-relayout only affected
texts, defer stale-selrect sync until the first tiles paint, and
batch request-render after attr updates. Tolerate missing font-face
keys so callers that omit them do not blow up.
