Status: Done
Each top-level category can have a icon and subtitle.
Icons are managed by development and setup per category-id. If you want a different Icon, send a request with categoryId and the desired icon.
Subtitles are managed, per language, through this tab in Google Sheets, again per category ID.
After changing data, content should be visible in 5-10 minutes. If not, visit this page once, you can close after visit and then the information should be updated.