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/Entities/User/AppUserBookmark.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Text.Json.Serialization;
+using API.Entities.Interfaces;
+
+namespace API.Entities;
+
+
+/// <summary>
+/// Represents a saved page in a Chapter entity for a given user.
+/// </summary>
+public class AppUserBookmark : IEntityDate
+{
+    public int Id { get; set; }
+    public int Page { get; set; }
+    public int SeriesId { get; set; }
+    public int VolumeId { get; set; }
+    public int ChapterId { get; set; }
+
+    /// <summary>
+    /// Filename in the Bookmark Directory
+    /// </summary>
+    public string FileName { get; set; } = string.Empty;
+    /// <summary>
+    /// Only applicable for Epubs - handles multiple images on one page
+    /// </summary>
+    /// <remarks>0-based index of the image position on page</remarks>
+    public int ImageOffset { get; set; }
+    /// <summary>
+    /// Only applicable for Epubs
+    /// </summary>
+    public string? XPath { get; set; }
+    /// <summary>
+    /// Chapter name (from ToC) or Title (from ComicInfo/PDF)
+    /// </summary>
+    public string? ChapterTitle { get; set; }
+
+    // Relationships
+    [JsonIgnore]
+    public AppUser AppUser { get; set; } = null!;
+    public int AppUserId { get; set; }
+    public DateTime Created { get; set; }
+    public DateTime LastModified { get; set; }
+    public DateTime CreatedUtc { get; set; }
+    public DateTime LastModifiedUtc { get; set; }
+}