feat: 技术债务清理（支付配置动态化、API文档补全、轮询常量提取、废弃代码清理）

pkg/constants/constants.go

@@ -43,7 +43,6 @@ const (
 // 任务类型常量
 const (
 	TaskTypeEmailSend              = "email:send"               // 发送邮件
-	TaskTypeDataSync               = "data:sync"                // 数据同步
 	TaskTypeCommission             = "commission:calculate"     // 分佣计算
 	TaskTypeIotCardImport          = "iot_card:import"          // IoT 卡批量导入
 	TaskTypeDeviceImport           = "device:import"            // 设备批量导入
@@ -233,3 +232,48 @@ const (
 	ExchangeAssetTypeIotCard = "iot_card" // 物联网卡
 	ExchangeAssetTypeDevice  = "device"   // 设备
 )
+
+// GetStatusName 获取通用启用/禁用状态名称
+// 用于 status 字段：0=禁用, 1=启用
+func GetStatusName(status int) string {
+	switch status {
+	case StatusDisabled:
+		return "禁用"
+	case StatusEnabled:
+		return "启用"
+	default:
+		return "未知"
+	}
+}
+
+// GetShelfStatusName 获取上架状态名称
+// 用于 shelf_status 字段：1=上架, 2=下架
+func GetShelfStatusName(status int) string {
+	switch status {
+	case ShelfStatusOn:
+		return "上架"
+	case ShelfStatusOff:
+		return "下架"
+	default:
+		return "未知"
+	}
+}
+
+// GetExchangeStatusName 获取换货单状态名称
+// 用于 exchange_status 字段
+func GetExchangeStatusName(status int) string {
+	switch status {
+	case ExchangeStatusPendingInfo:
+		return "待填写信息"
+	case ExchangeStatusPendingShip:
+		return "待发货"
+	case ExchangeStatusShipped:
+		return "已发货待确认"
+	case ExchangeStatusCompleted:
+		return "已完成"
+	case ExchangeStatusCancelled:
+		return "已取消"
+	default:
+		return "未知"
+	}
+}