Have backend also keep track of users who voted on a track to prevent duplicate voting. Add vote count next to vote button. Make sure these details are correct, event on refresh.

src/GroovePlayer.h

@@ -51,6 +51,7 @@ public:
     AudioTrack currentTrack;
     std::list<AudioTrack> currentVoteBatch;
     std::list<std::pair<AudioTrack, int>> currentVoteStatus;
+    std::list<User> currentUsersVoted;
     bool voteEndedButNotNextTrackYet = false;
     std::list<User> currentSkipRequester;
     std::chrono::steady_clock::time_point skipRequestedAt;