[Feature] Add "undo" option after resolving duplicates (Gmail-style pattern)

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature Currently, there's no straightforward way to revert an action after resolving duplicates. Although items go to the trash, restoring them from there isn't enough, since the resolve process triggers other actions besides the deletion itself, so simply recovering the item doesn't put things back the way they were. Also, not every user has the trash feature enabled, so that path doesn't cover all cases. Proposal: Since implementing a real undo is complex due to the side effects generated by the resolve process, I'd propose applying a pattern similar to the one Gmail uses when sending emails: When the resolve action is confirmed, the endpoint isn't called immediately. We wait a few seconds before executing the actual action, showing the undo option during that window. If the user tries to close the window/tab …