Use of Qt's native rich text stuff generates lots of funky HTML 4 in messages coming from the GUI. Also expects equally funky HTML in incoming messages. Getting this to display sensible on a web page is probably a fair bit of work.
Proposal is to strip all HTML from incoming messages and interpret remaining text as Markdown on the web side. RS GUI users will get a few extra asterisks and so forth but that can be fixed in the GUI at some point.