fix(fast rebuild): handle added an deleted markdown correctly (#921)

kabirgh

2024-02-24 a6417c447af8f0ff203ffb8730e53e4a7dfafb23

 quartz/components/styles/toc.scss

@@ -30,6 +30,7 @@
  overflow: hidden;
  max-height: none;
  transition: max-height 0.5s ease;
  position: relative;

  &.collapsed > .overflow::after {
    opacity: 0;