refactor: 更新套餐系列分配和套餐模型，支持梯度佣金和代理强充

ShopSeriesAllocation 新增 commission_tiers_json（梯度模式专属阶梯 JSON）、enable_force_recharge（代理自设强充开关）、force_recharge_amount（强充金额，0 表示使用阈值）字段；移除与 PackageSeries 重复的三个字段。Package 模型补充 PackageSeriesID 字段，用于系列授权套餐归属校验。

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

internal/model/package.go

@@ -119,6 +119,7 @@ type OneTimeCommissionConfig struct {
 
 // OneTimeCommissionTier 一次性佣金梯度配置
 type OneTimeCommissionTier struct {
+	Operator  string `json:"operator"`  // 阈值比较运算符：>、>=、<、<=，空值默认 >=
 	Dimension string `json:"dimension"`
 	StatScope string `json:"stat_scope"`
 	Threshold int64  `json:"threshold"`
@@ -141,6 +142,11 @@ const (
 
 	TierTypeSalesCount  = "sales_count"
 	TierTypeSalesAmount = "sales_amount"
+	// 阈值运算符常量
+	TierOperatorGT  = ">"
+	TierOperatorGTE = ">="
+	TierOperatorLT  = "<"
+	TierOperatorLTE = "<="
 )
 
 func (ps *PackageSeries) GetOneTimeCommissionConfig() (*OneTimeCommissionConfig, error) {

internal/model/shop_series_allocation.go

@@ -1,25 +1,60 @@
 package model
 
 import (
+	"encoding/json"
+
 	"gorm.io/gorm"
 )
 
+// ShopSeriesAllocation 店铺系列分配模型
+// 记录平台或上级代理授权给某代理店铺可销售的套餐系列，以及佣金上限配置
 type ShopSeriesAllocation struct {
 	gorm.Model
-	BaseModel                  `gorm:"embedded"`
-	ShopID                     uint   `gorm:"column:shop_id;index;not null;comment:被分配的店铺ID" json:"shop_id"`
-	SeriesID                   uint   `gorm:"column:series_id;index;not null;comment:套餐系列ID" json:"series_id"`
-	AllocatorShopID            uint   `gorm:"column:allocator_shop_id;index;not null;default:0;comment:分配者店铺ID，0表示平台分配" json:"allocator_shop_id"`
-	OneTimeCommissionAmount    int64  `gorm:"column:one_time_commission_amount;type:bigint;default:0;not null;comment:该代理能拿的一次性佣金金额上限（分）" json:"one_time_commission_amount"`
-	EnableOneTimeCommission    bool   `gorm:"column:enable_one_time_commission;default:false;not null;comment:是否启用一次性佣金" json:"enable_one_time_commission"`
-	OneTimeCommissionTrigger   string `gorm:"column:one_time_commission_trigger;type:varchar(50);comment:一次性佣金触发类型" json:"one_time_commission_trigger"`
-	OneTimeCommissionThreshold int64  `gorm:"column:one_time_commission_threshold;type:bigint;default:0;not null;comment:一次性佣金触发阈值（分）" json:"one_time_commission_threshold"`
-	EnableForceRecharge        bool   `gorm:"column:enable_force_recharge;default:false;not null;comment:是否启用强制充值" json:"enable_force_recharge"`
-	ForceRechargeAmount        int64  `gorm:"column:force_recharge_amount;type:bigint;default:0;not null;comment:强制充值金额（分）" json:"force_recharge_amount"`
-	ForceRechargeTriggerType   int    `gorm:"column:force_recharge_trigger_type;type:int;default:2;not null;comment:强充触发类型 1-单次充值 2-累计充值" json:"force_recharge_trigger_type"`
-	Status                     int    `gorm:"column:status;type:int;default:1;not null;comment:状态 1-启用 2-禁用" json:"status"`
+	BaseModel                `gorm:"embedded"`
+	ShopID                  uint   `gorm:"column:shop_id;index;not null;comment:被分配的店铺ID" json:"shop_id"`
+	SeriesID                uint   `gorm:"column:series_id;index;not null;comment:套餐系列ID" json:"series_id"`
+	AllocatorShopID         uint   `gorm:"column:allocator_shop_id;index;not null;default:0;comment:分配者店铺ID，0表示平台分配" json:"allocator_shop_id"`
+	OneTimeCommissionAmount int64  `gorm:"column:one_time_commission_amount;type:bigint;default:0;not null;comment:该代理能拿的一次性佣金金额上限（分），固定模式有效" json:"one_time_commission_amount"`
+	CommissionTiersJSON     string `gorm:"column:commission_tiers_json;type:jsonb;default:'[]';not null;comment:梯度模式专属阶梯金额列表" json:"commission_tiers_json"`
+	EnableForceRecharge     bool   `gorm:"column:enable_force_recharge;default:false;not null;comment:是否启用强制充值" json:"enable_force_recharge"`
+	ForceRechargeAmount     int64  `gorm:"column:force_recharge_amount;type:bigint;default:0;not null;comment:强制充值金额（分）" json:"force_recharge_amount"`
+	ForceRechargeTriggerType int   `gorm:"column:force_recharge_trigger_type;type:int;default:2;not null;comment:强充触发类型 1-单次充值 2-累计充值" json:"force_recharge_trigger_type"`
+	Status                  int    `gorm:"column:status;type:int;default:1;not null;comment:状态 1-启用 2-禁用" json:"status"`
 }
 
+// TableName 指定表名
 func (ShopSeriesAllocation) TableName() string {
 	return "tb_shop_series_allocation"
 }
+
+// AllocationCommissionTier 代理专属梯度佣金档位（仅存金额，阈值和运算符从 PackageSeries 全局配置读取）
+type AllocationCommissionTier struct {
+	Threshold int64 `json:"threshold"` // 阈值（与 PackageSeries.Tiers 对应）
+	Amount    int64 `json:"amount"`    // 该代理在此档位的佣金上限（分）
+}
+
+// GetCommissionTiers 解析梯度佣金阶梯列表
+func (a *ShopSeriesAllocation) GetCommissionTiers() ([]AllocationCommissionTier, error) {
+	if a.CommissionTiersJSON == "" || a.CommissionTiersJSON == "[]" {
+		return []AllocationCommissionTier{}, nil
+	}
+	var tiers []AllocationCommissionTier
+	if err := json.Unmarshal([]byte(a.CommissionTiersJSON), &tiers); err != nil {
+		return nil, err
+	}
+	return tiers, nil
+}
+
+// SetCommissionTiers 序列化梯度佣金阶梯列表
+func (a *ShopSeriesAllocation) SetCommissionTiers(tiers []AllocationCommissionTier) error {
+	if len(tiers) == 0 {
+		a.CommissionTiersJSON = "[]"
+		return nil
+	}
+	data, err := json.Marshal(tiers)
+	if err != nil {
+		return err
+	}
+	a.CommissionTiersJSON = string(data)
+	return nil
+}