fix: 平台账号后台创建钱包订单时，绕过代理套餐分配检查

后台钱包支付下单时，原逻辑根据卡/设备所属代理店铺触发
套餐分配上架校验，导致平台账号无法为属于代理的卡购买
未被该代理分配的套餐（如 0 元赠送套餐）。

修复：在 CreateAdminOrder wallet 分支中，按买家类型区分：
- 代理账号：保留原有校验，确保卡所属代理已分配该套餐
- 平台/超管账号：跳过代理分配检查，仅验证套餐全局状态

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/service/order/service.go

@@ -346,12 +346,24 @@ func (s *Service) CreateAdminOrder(ctx context.Context, req *dto.CreateAdminOrde
 			if req.IotCardID == nil {
 				return nil, errors.New(errors.CodeInvalidParam, "单卡购买必须指定IoT卡ID")
 			}
-			validationResult, err = s.purchaseValidationService.ValidateCardPurchase(ctx, *req.IotCardID, req.PackageIDs)
+			// 平台账号代表平台直接下单，不受卡所属代理的套餐分配限制；
+			// 代理账号下单时，卡所属代理必须已将套餐上架分配
+			if buyerType == model.BuyerTypeAgent {
+				validationResult, err = s.purchaseValidationService.ValidateCardPurchase(ctx, *req.IotCardID, req.PackageIDs)
+			} else {
+				validationResult, err = s.purchaseValidationService.ValidateAdminOfflineCardPurchase(ctx, *req.IotCardID, req.PackageIDs)
+			}
 		} else if req.OrderType == model.OrderTypeDevice {
 			if req.DeviceID == nil {
 				return nil, errors.New(errors.CodeInvalidParam, "设备购买必须指定设备ID")
 			}
-			validationResult, err = s.purchaseValidationService.ValidateDevicePurchase(ctx, *req.DeviceID, req.PackageIDs)
+			// 平台账号代表平台直接下单，不受设备所属代理的套餐分配限制；
+			// 代理账号下单时，设备所属代理必须已将套餐上架分配
+			if buyerType == model.BuyerTypeAgent {
+				validationResult, err = s.purchaseValidationService.ValidateDevicePurchase(ctx, *req.DeviceID, req.PackageIDs)
+			} else {
+				validationResult, err = s.purchaseValidationService.ValidateAdminOfflineDevicePurchase(ctx, *req.DeviceID, req.PackageIDs)
+			}
 		} else {
 			return nil, errors.New(errors.CodeInvalidParam, "无效的订单类型")
 		}