fix indexing causing main thread freeze, various polish

Jacky Zhao

2023-07-04 ab9da02c60c962128820e6874e6f07c98bc3dda7

 quartz/components/Spacer.tsx

@@ -1,3 +1,7 @@
export default function() {
import { QuartzComponentConstructor } from "./types"

function Spacer() {
  return <div class="spacer"></div>
}

export default (() => Spacer) satisfies QuartzComponentConstructor