I know I said I was going to need, but one last thing: Add a scroll to latest button back in. Now that I've got JavaScript to tag the latest post, adding a latest id should be easy enough.
Still, suggestions on how to tag the latest article server side are welcome.
(Stop messing about with IAsyncEnumrable and pull all the entries into a list. Or, y'know, do it right and generate the HTML at save time.)