Running support: tickets, threading & replies — It updates while you read it

A reply arriving lands in an open thread without a refresh. First paint, your own send and a live arrival all go through one rendering path on purpose — a second path would be a second set of bugs, and the place they would show up is the place that matters most: an agent believing they replied when they hadn't. People watching the record hear about replies too, which is why the form and widget settings offer to put the queue's owners on the watch list automatically.