refactor: 统一状态名称映射为公共函数，清理废弃换卡/商户类型常量和模型

internal/service/enterprise_device/service.go

@@ -523,7 +523,7 @@ func (s *Service) GetDeviceDetail(ctx context.Context, deviceID uint) (*dto.Ente
 				MSISDN:            card.MSISDN,
 				CarrierName:       carrierMap[card.CarrierID],
 				NetworkStatus:     card.NetworkStatus,
-				NetworkStatusName: getNetworkStatusName(card.NetworkStatus),
+				NetworkStatusName: constants.GetNetworkStatusName(card.NetworkStatus),
 			})
 		}
 	}
@@ -602,10 +602,3 @@ func (s *Service) validateCardOperation(ctx context.Context, deviceID, cardID ui
 
 	return nil
 }
-
-func getNetworkStatusName(status int) string {
-	if status == 1 {
-		return "开机"
-	}
-	return "停机"
-}