feat: support non-singleton table of contents

Jacky Zhao

2025-03-09 1cd8e7f0d510b97dfc2c3314c36d957383162a8f

 quartz/components/styles/backlinks.scss

@@ -1,4 +1,8 @@
@use "../../styles/variables.scss" as *;

.backlinks {
  flex-direction: column;

  & > h3 {
    font-size: 1rem;
    margin: 0;