After the welcome addition of the “Grant Badge” button to the post “spanner” menu, can I suggest one additional feature:
Display under the post that a badge has been granted.
Visually it would be similar to the link that’s shown to mods when another mod has PMed the user about their post.
The icon of the badge and the avatar of the granter could be included.
This message would help avoid two moderators awarding the same badge to the post.
It would also display the badge more prominently to the community.