Some more suggestions

  1. Make the title for a thread with unread in it, more contrasty for light mode also (such as make the text much bolder)

  2. The button at the top that says “New” actually means “New Topics”, as far as I can tell. Could it be renamed?

  3. Clicking on “Dismiss New” does not mark the posts as read. Could it do that?

  4. Those items just below the header, such as selecting category, “Latest”, “New”, “+ New Topic”, etc, actually belong in the header, IMO. Can they be moved there so they don’t scroll off the top? (this was also an issue with the old site)

  5. A “Mark All as Read” button would be favourite.