fleshout backend

backend/Data/User.cs

@@ -0,0 +1,15 @@
+namespace Backend.Data;
+
+/// <summary>
+/// Placeholder domain entity. Replace with the real model once the project has one.
+/// </summary>
+public sealed class User
+{
+    public Guid Id { get; init; } = Guid.NewGuid();
+
+    public required string Email { get; set; }
+
+    public required string DisplayName { get; set; }
+
+    public DateTime CreatedAt { get; init; } = DateTime.UtcNow;
+}