Delete received private messages

[aeharding]

Requirements

• [X] Is this a feature request? For questions or discussions use https://lemmy.ml/c/lemmy_support
• [X] Did you check to see if this issue already exists?
• [X] Is this only a feature request? Do not put multiple feature requests in one issue.
• [X] Is this a backend issue? Use the lemmy-ui repo for UI / frontend issues.

Is your proposal related to a problem?

Users should be able to delete received private messages. Right now they can only delete private messages they sent.

This is common functionality available in various messaging clients so that users can remove private conversations, in whole or in part, from their account.

Describe the solution you'd like.

Users can delete any private message from their inbox

Describe alternatives you've considered.

There's no real alternative. I guess you could delete your account.

Additional context

https://github.com/LemmyNet/lemmy/issues/3629#issuecomment-1778051833

[MV-GH]

Would this actually delete the pm, so that it won't even show for the user that sent it. Or would it soft delete it, in the sense that it would hide this pm from showing for this user. But the sender can still see it.

[aeharding]

@MV-GH Most messaging apps I know of only delete the message from the inbox of the person that deleted it.