fix indexing causing main thread freeze, various polish

Jacky Zhao

2023-07-04 ab9da02c60c962128820e6874e6f07c98bc3dda7

 quartz/components/styles/toc.scss

@@ -30,7 +30,6 @@
  overflow: hidden;
  max-height: none;
  transition: max-height 0.3s ease;
  font-size: 0.9rem;

  & ul {
    list-style: none;