agregando dto para actualizar relacion user-category

import { ApiProperty } from '@nestjs/swagger';

import { Transform } from 'class-transformer';

import { IsArray } from 'class-validator';

export class UpdatePreferedCategoriesDto {

  @ApiProperty({ type: String, description: 'Comma-separated list of category IDs', example: '1,2,3' })

  @IsArray()

  @Transform(({ value }) => value.split(',').map(Number))

  idCategories: number[];

}