Allow addition of spoiler tag on image by poster or moderators AFTER post complete

Two pieces to this but they seem related to me, so posting them together.

I have often posted something and then realized a moment later that I should have spoiler tagged it - a meme that used a curse word in a chat that requires spoilers for non-PG language for example. I'm left with my only option being to delete the post and re-upload it, even though if it was text I'd be able to edit it in after the fact. Being able to hit edit on the post and spoiler it would be an amazing feature!

And as a related note, I wish, as a moderator/server runner, I had the option to tag users' posts/images as spoilers. There's been multiple times where someone's posted something that isn't against the rules but still would have been polite to spoiler (like a picture of a spider or actual spoilers) and my options have been delete it, or get them to re-post it, both of which have problems with the flow of conversation. Plus there are cases where I'd like to be able to simply spoiler tag someone's text post as opposed to deleting it. I appreciate that Discord doesn't allow moderators to actually edit people's posts to avoid words being put into mouths, but censoring in this way seems like a very useful feature.