So basically you’ve proven there is a need for a Chat Messages to be converted to Posts on occasion ?
Perhaps a bulk select feature and a “convert to Topic” command that does all that work for you?
And perhaps the same with “Move to Topic” to allow you to append converted Messages as Posts on the end of existing Topics?
(Going to be cheeky and move this to Contribute > Feature )
You know I’d love to move some valuable complex personal chats to PMs!