Nest subcategories under their parent categories in the sidebar

[Lilly (Lillian)]

I made a simple theme component for doing this

Indented / Nested Sidebar Categories or Subcategories

This theme component is deprecated in favour of Discourse Indented Subcategories. Please switch to that one, it is much simpler and easier to use. This repo will no longer be maintained and will be archived around February 20, 2026. Summary Indents / nests selected categories or subcategories in the sidebar Repository https://github.com/Lillinator/discourse-nested-categories Preview Preview on Discourse Theme Creat…