fix: 修改 ssPlusN 函数中的排名提示信息，并优化目标玩家查找逻辑以确保排名不低于1

handler/scoresaber/score.go

@@ -76,7 +76,7 @@ func ssPlusN(msg model.Message) (reply model.Reply) {
 			FromMsg:        msg,
 		}
 	}
-	resultStr.WriteString(fmt.Sprintf("您当前的区排名为：%d\n", userInfo.CountryRank))
+	resultStr.WriteString(fmt.Sprintf("您当前的全区排名为：%d\n", userInfo.CountryRank))
 	// 获取当前用户所在区对应+N位的玩家列表
 	leaderboard, err := scoresaber.FetchCountryLeaderboard(userInfo.Country, userInfo.CountryRank-N, userInfo.ID)
 	if err != nil {
@@ -91,8 +91,12 @@ 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 {
+		targetRank = 1
+	}
 	for _, player := range leaderboard.Players {
-		if player.CountryRank == userInfo.CountryRank-N {
+		if player.CountryRank == targetRank {
 			targetPlayer = player
 			break
 		}