Progress Overhaul + Profile Page and a LOT more! (#4262)

Co-authored-by: Amelia <77553571+Fesaa@users.noreply.github.com>
Co-authored-by: Robbie Davis <robbie@therobbiedavis.com>

API/DTOs/Progress/ClientDeviceDto.cs

@@ -0,0 +1,23 @@
+using System;
+
+namespace API.DTOs.Progress;
+
+public sealed record ClientDeviceDto
+{
+    public int Id { get; set; }
+    /// <summary>
+    /// User-friendly name, defaults to generated name like "Chrome on Windows"
+    /// </summary>
+    public string FriendlyName { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Most recent stable ClientInfoData (excluding IP/timestamp changes)
+    /// </summary>
+    public ClientInfoDto CurrentClientInfo { get; set; } = new();
+
+    public DateTime FirstSeenUtc { get; set; }
+    public DateTime LastSeenUtc { get; set; }
+
+    public string OwnerUsername { get; set; }
+    public int OwnerUserId { get; set; }
+}