修复超额流量不记录的问题

internal/service/package/usage_service.go

@@ -65,7 +65,8 @@ func (s *UsageService) SetStopResumeCallback(callback StopResumeCallback) {
 
 // DeductDataUsage 任务 10.2-10.6: 按优先级扣减流量
 // 扣减顺序：加油包（按 priority ASC） → 主套餐
-// 流量用完时自动标记 status=2，所有套餐用完时触发停机
+// 真实用量允许超过套餐阈值，超额部分记入最后一个生效套餐，用于后续虚流量阈值评估。
+// 流量用完时自动标记 status=2，所有套餐用完时触发停机。
 func (s *UsageService) DeductDataUsage(ctx context.Context, carrierType string, carrierID uint, usageMB float64) error {
 	if usageMB <= 0 {
 		return errors.New(errors.CodeInvalidParam, "扣减流量必须大于0")
@@ -94,7 +95,7 @@ func (s *UsageService) DeductDataUsage(ctx context.Context, carrierType string,
 		remainingUsage := deductUsageMB
 		today := time.Now().Format("2006-01-02")
 
-		for _, pkg := range packages {
+		for index, pkg := range packages {
 			if remainingUsage <= 0 {
 				break
 			}
@@ -102,7 +103,8 @@ func (s *UsageService) DeductDataUsage(ctx context.Context, carrierType string,
 			// 计算当前套餐剩余额度
 			effectiveThresholdMB := pkg.EffectiveThresholdMB()
 			remainingQuota := pkg.RemainingQuotaMB()
-			if remainingQuota <= 0 {
+			isLastPackage := index == len(packages)-1
+			if remainingQuota <= 0 && !isLastPackage {
 				// 套餐已用完，标记为已用完
 				if err := tx.Model(pkg).Update("status", constants.PackageUsageStatusDepleted).Error; err != nil {
 					return errors.Wrap(errors.CodeDatabaseError, err, "更新套餐状态失败")
@@ -112,11 +114,19 @@ func (s *UsageService) DeductDataUsage(ctx context.Context, carrierType string,
 
 			// 本次从该套餐扣减的流量
 			var deductFromPkg int64
-			if remainingUsage <= remainingQuota {
+			if isLastPackage {
+				deductFromPkg = remainingUsage
+			} else if remainingUsage <= remainingQuota {
 				deductFromPkg = remainingUsage
 			} else {
 				deductFromPkg = remainingQuota
 			}
+			if deductFromPkg <= 0 {
+				if err := tx.Model(pkg).Update("status", constants.PackageUsageStatusDepleted).Error; err != nil {
+					return errors.Wrap(errors.CodeDatabaseError, err, "更新套餐状态失败")
+				}
+				continue
+			}
 
 			// 更新套餐使用量
 			newUsage := pkg.DataUsageMB + deductFromPkg
@@ -145,17 +155,9 @@ func (s *UsageService) DeductDataUsage(ctx context.Context, carrierType string,
 				zap.Int64("deduct_mb", deductFromPkg),
 				zap.Int64("new_usage_mb", newUsage),
 				zap.Int64("effective_threshold_mb", effectiveThresholdMB),
-				zap.Int64("data_limit_mb", pkg.DataLimitMB))
-		}
-
-		// 如果流量扣减未完成，说明所有套餐都不够
-		if remainingUsage > 0 {
-			s.logger.Warn("流量不足",
-				zap.String("carrier_type", targetCarrierType),
-				zap.Uint("carrier_id", targetCarrierID),
-				zap.Int64("requested_mb", deductUsageMB),
-				zap.Int64("remaining_mb", remainingUsage))
-			return errors.New(errors.CodeInsufficientQuota, "流量不足")
+				zap.Int64("data_limit_mb", pkg.DataLimitMB),
+				zap.Int64("remaining_quota_mb", remainingQuota),
+				zap.Bool("over_threshold", effectiveThresholdMB > 0 && newUsage > effectiveThresholdMB))
 		}
 
 		// 任务 10.5: 检查是否所有套餐都用完（触发停机）