修复订单金额落库不对的问题

internal/model/package.go

@@ -84,7 +84,8 @@ type PackageUsage struct {
 	HasIndependentExpiry      bool       `gorm:"column:has_independent_expiry;type:boolean;default:false;comment:加油包是否有独立有效期(true-有独立到期时间 false-跟随主套餐)" json:"has_independent_expiry"`
 	PendingRealnameActivation bool       `gorm:"column:pending_realname_activation;type:boolean;default:false;comment:是否等待实名激活(true-待实名后激活 false-已激活或不需实名)" json:"pending_realname_activation"`
 	PackageName               string     `gorm:"column:package_name;type:varchar(255);not null;default:'';comment:套餐名称快照(从Package复制,用于历史记录展示)" json:"package_name"`
-	PaidAmount                *int64     `gorm:"column:paid_amount;type:bigint;comment:购买实付金额快照（分，从订单复制，无订单或线下支付时为null）" json:"paid_amount,omitempty"`
+	PaidAmount                *int64     `gorm:"column:paid_amount;type:bigint;comment:购买实付金额快照（分，从订单 actual_paid_amount 复制，无订单或线下支付时为null）" json:"paid_amount,omitempty"`
+	RetailAmount              *int64     `gorm:"column:retail_amount;type:bigint;comment:购买零售价快照（分，从订单 total_amount 复制，无订单关联时为null）" json:"retail_amount,omitempty"`
 	PackagePriceConfigStatus  int        `gorm:"column:package_price_config_status;type:int;default:0;not null;comment:套餐价格配置状态快照 0-未配置 1-赠送0价 2-已配置非0" json:"package_price_config_status"`
 	PackageIsGift             bool       `gorm:"column:package_is_gift;type:boolean;default:false;not null;comment:套餐是否赠送快照 true-赠送 false-普通可售" json:"package_is_gift"`
 	DataResetCycle            string     `gorm:"column:data_reset_cycle;type:varchar(20);comment:流量重置周期(从Package复制,用于历史记录)" json:"data_reset_cycle"`