[note cross-posting and prune as appropriate]
How difficult would it be to add <<title>> attributes to the Category links which appear at the bottom of articles?
I was thinking it might be a good idea to have some way to display the "sort key" without having to delve into edit mode, so I wondered if this could be displayed as a "tool-tip" when hovering over the link, in the same way as the destination article is shown for a regular wikilink. Is this an idea which might be helpful, or am I getting punch-drunk after a difficult day?