fix: 修改 ssPlusN 函数中的排名计算逻辑，确保目标排名为 1 时的处理更加准确

handler/beatleader/beatleader.go

@@ -114,7 +114,7 @@ func blPlus(msg model.Message) (reply *model.Reply) {
 		//寻找leaderboard中排名为userInfo.CountryRank-N的玩家
 		var targetPlayer beatleader.PlayerDataLite
 		targetRank := userInfo.CountryRank - N
-		if targetRank < 0 {
+		if targetRank <= 0 {
 			targetRank = 1
 		}
 		if len(leaderboard) == 0 {

handler/scoresaber/score.go

@@ -112,7 +112,7 @@ func ssPlusN(msg model.Message) (reply *model.Reply) {
 		//寻找leaderboard中排名为userInfo.CountryRank-N的玩家
 		var targetPlayer scoresaber.PlayerData
 		targetRank := userInfo.CountryRank - N
-		if targetRank < 0 {
+		if targetRank <= 0 {
 			targetRank = 1
 		}
 		if len(leaderboard.Players) == 0 {