using System.ComponentModel.DataAnnotations; namespace LittleShop.Models; public class PushSubscription { public int Id { get; set; } [Required] public string Endpoint { get; set; } = string.Empty; [Required] public string P256DH { get; set; } = string.Empty; [Required] public string Auth { get; set; } = string.Empty; public Guid? UserId { get; set; } public User? User { get; set; } public Guid? CustomerId { get; set; } public Customer? Customer { get; set; } public DateTime SubscribedAt { get; set; } = DateTime.UtcNow; public DateTime? LastUsedAt { get; set; } public bool IsActive { get; set; } = true; // Browser/device information for identification public string? UserAgent { get; set; } public string? IpAddress { get; set; } }