fix: 在 blPlus 和 ssPlusN 函数中优化未找到目标排名玩家的提示信息，确保用户获得清晰的反馈

handler/beatleader/beatleader.go

@@ -126,19 +126,30 @@ func blPlus(msg model.Message) (reply *model.Reply) {
 		}
 		if len(leaderboard) == 0 {
 			resultStr.WriteString("\n")
-			resultStr.WriteString("请输入一个有效的目标排名偏移量（现在太大了）")
+			resultStr.WriteString("未找到目标排名的玩家，请尝试更小的目标排名偏移量")
 			return &model.Reply{
 				ReplyMsg:       resultStr.String(),
 				ReferOriginMsg: true,
 				FromMsg:        msg,
 			}
 		}
+		var foundTargetPlayer bool
 		for _, player := range leaderboard {
 			if player.CountryRank == targetRank {
 				targetPlayer = player
+				foundTargetPlayer = true
 				break
 			}
 		}
+		if !foundTargetPlayer {
+			resultStr.WriteString("\n")
+			resultStr.WriteString("未找到目标排名的玩家，请尝试更小的目标排名偏移量")
+			return &model.Reply{
+				ReplyMsg:       resultStr.String(),
+				ReferOriginMsg: true,
+				FromMsg:        msg,
+			}
+		}
 		resultStr.WriteString("\n")
 		if isPlus {
 			resultStr.WriteString(fmt.Sprintf("您只需要再打出%.2fpp就能超越 %s，达到%s区第%d名。", targetPlayer.PP-userInfo.PP, targetPlayer.Name, userInfo.Country, targetPlayer.CountryRank))

handler/scoresaber/score.go

@@ -124,19 +124,30 @@ func ssPlusN(msg model.Message) (reply *model.Reply) {
 		}
 		if len(leaderboard.Players) == 0 {
 			resultStr.WriteString("\n")
-			resultStr.WriteString("请输入一个有效的目标排名偏移量（现在太大了）")
+			resultStr.WriteString("未找到目标排名的玩家，请尝试更小的目标排名偏移量")
 			return &model.Reply{
 				ReplyMsg:       resultStr.String(),
 				ReferOriginMsg: true,
 				FromMsg:        msg,
 			}
 		}
+		var foundTargetPlayer bool
 		for _, player := range leaderboard.Players {
 			if player.CountryRank == targetRank {
 				targetPlayer = player
+				foundTargetPlayer = true
 				break
 			}
 		}
+		if !foundTargetPlayer {
+			resultStr.WriteString("\n")
+			resultStr.WriteString("未找到目标排名的玩家，请尝试更小的目标排名偏移量")
+			return &model.Reply{
+				ReplyMsg:       resultStr.String(),
+				ReferOriginMsg: true,
+				FromMsg:        msg,
+			}
+		}
 		resultStr.WriteString("\n")
 		if isPlus {
 			resultStr.WriteString(fmt.Sprintf("您只需要再打出%.2fpp就能超越%s，达到%s区第%d名。", targetPlayer.PP-userInfo.PP, targetPlayer.Name, userInfo.Country, targetPlayer.CountryRank))