fix: 记录查询扫描结构显式指定列名，修复 ICCID 一直为空

GORM 默认把字段 ICCID 映射成 icc_id，卡日流量的 c.iccid 和展示字段批量查询都读不到值；
扫描用的匿名结构统一写 gorm column tag。

internal/query/recorddisplay/lookup.go

@@ -47,9 +47,10 @@ func Load(ctx context.Context, db *gorm.DB, req Request) (*Lookup, error) {
 	session := db.WithContext(ctx).Unscoped()
 
 	if ids := distinct(req.CardIDs); len(ids) > 0 {
+		// 显式列名：GORM 默认把字段 ICCID 映射成 icc_id，不写 tag 会读不到值。
 		var rows []struct {
-			ID    uint
-			ICCID string
+			ID    uint   `gorm:"column:id"`
+			ICCID string `gorm:"column:iccid"`
 		}
 		if err := session.Model(&model.IotCard{}).Select("id, iccid").Where("id IN ?", ids).Scan(&rows).Error; err != nil {
 			return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询卡展示信息失败")
@@ -60,9 +61,9 @@ func Load(ctx context.Context, db *gorm.DB, req Request) (*Lookup, error) {
 	}
 	if ids := distinct(req.DeviceIDs); len(ids) > 0 {
 		var rows []struct {
-			ID        uint
-			VirtualNo string
-			IMEI      string
+			ID        uint   `gorm:"column:id"`
+			VirtualNo string `gorm:"column:virtual_no"`
+			IMEI      string `gorm:"column:imei"`
 		}
 		if err := session.Model(&model.Device{}).Select("id, virtual_no, imei").Where("id IN ?", ids).Scan(&rows).Error; err != nil {
 			return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询设备展示信息失败")
@@ -73,8 +74,8 @@ func Load(ctx context.Context, db *gorm.DB, req Request) (*Lookup, error) {
 	}
 	if ids := distinct(req.CarrierIDs); len(ids) > 0 {
 		var rows []struct {
-			ID          uint
-			CarrierName string
+			ID          uint   `gorm:"column:id"`
+			CarrierName string `gorm:"column:carrier_name"`
 		}
 		if err := session.Model(&model.Carrier{}).Select("id, carrier_name").Where("id IN ?", ids).Scan(&rows).Error; err != nil {
 			return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询运营商账户展示信息失败")
@@ -85,8 +86,8 @@ func Load(ctx context.Context, db *gorm.DB, req Request) (*Lookup, error) {
 	}
 	if ids := distinct(req.OperatorIDs); len(ids) > 0 {
 		var rows []struct {
-			ID       uint
-			Username string
+			ID       uint   `gorm:"column:id"`
+			Username string `gorm:"column:username"`
 		}
 		if err := session.Model(&model.Account{}).Select("id, username").Where("id IN ?", ids).Scan(&rows).Error; err != nil {
 			return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询操作人展示信息失败")
@@ -97,8 +98,8 @@ func Load(ctx context.Context, db *gorm.DB, req Request) (*Lookup, error) {
 	}
 	if ids := distinct(req.PackageUsageIDs); len(ids) > 0 {
 		var rows []struct {
-			ID          uint
-			PackageName string
+			ID          uint   `gorm:"column:id"`
+			PackageName string `gorm:"column:package_name"`
 		}
 		if err := session.Model(&model.PackageUsage{}).Select("id, package_name").Where("id IN ?", ids).Scan(&rows).Error; err != nil {
 			return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询套餐名称失败")

internal/service/asset/record_query.go

@@ -257,10 +257,11 @@ func (s *Service) ListCardDailyUsages(ctx context.Context, req *dto.CardDailyUsa
 	if err != nil || scope.empty() {
 		return resp, err
 	}
+	// 显式列名：GORM 默认把字段 ICCID 映射成 icc_id，不写 tag 时 ICCID 一直为空。
 	type row struct {
 		model.CardFlowDay
-		ICCID     string
-		CarrierID uint
+		ICCID     string `gorm:"column:iccid"`
+		CarrierID uint   `gorm:"column:carrier_id"`
 	}
 	query := s.db.WithContext(ctx).Table("tb_card_flow_day AS u").
 		Select("u.*, c.iccid, c.carrier_id").Joins("LEFT JOIN tb_iot_card c ON c.id = u.iot_card_id").
@@ -312,10 +313,10 @@ func (s *Service) ListPackageUsageDailyRecords(ctx context.Context, req *dto.Pac
 	}
 	type row struct {
 		model.PackageUsageDailyRecord
-		PackageID   uint
-		PackageName string
-		IotCardID   uint
-		DeviceID    uint
+		PackageID   uint   `gorm:"column:package_id"`
+		PackageName string `gorm:"column:package_name"`
+		IotCardID   uint   `gorm:"column:iot_card_id"`
+		DeviceID    uint   `gorm:"column:device_id"`
 	}
 	query := s.db.WithContext(ctx).Table("tb_package_usage_daily_record AS r").
 		Select("r.*, pu.package_id, pu.package_name, COALESCE(pu.iot_card_id, 0) AS iot_card_id, COALESCE(pu.device_id, 0) AS device_id").