Currently, the only way to tell that you've already liked/voted for a post is by hovering over the number of likes/votes and checking the list of users.
It would be great if this were also visually indicated directly on the post — for example, by highlighting the Like/Vote button in blue after you've clicked it, and optionally changing the text to Liked/Voted.
This would make it much easier to see at a glance whether you've already interacted with a post, without needing to hover over the counter.
