Initial commit: HelpDesk ICHN - .NET 10 backend + Next.js 16 frontend

backend/HelpDesk.Models/Entities/ActivityLog.cs

@@ -0,0 +1,30 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace HelpDesk.Models.Entities;
+
+[Table("activity_logs")]
+public class ActivityLog
+{
+    [Key]
+    public Guid Id { get; set; }
+
+    public Guid? UserId { get; set; }
+
+    [Required]
+    [MaxLength(100)]
+    public string EntityType { get; set; } = string.Empty;
+
+    public int? EntityId { get; set; }
+
+    [Required]
+    [MaxLength(100)]
+    public string Action { get; set; } = string.Empty;
+
+    public string? Details { get; set; }
+
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    // Navigation
+    public User? User { get; set; }
+}