feat: implement real-time reading progress and refactor profile to CQRS

src/NexusReader.Infrastructure/Handlers/UpdateReadingProgressCommandHandler.cs

@@ -35,6 +35,15 @@ public class UpdateReadingProgressCommandHandler : IRequestHandler<UpdateReading
         user.LastReadPageId = request.PageId;
         user.LastReadAt = now;
 
+        // Update specific Ebook progress
+        var ebook = await context.Ebooks.FirstOrDefaultAsync(e => e.Id == request.EbookId, cancellationToken);
+        if (ebook != null)
+        {
+            ebook.Progress = request.Progress;
+            ebook.LastChapter = request.ChapterTitle;
+            ebook.LastReadDate = now;
+        }
+
         await context.SaveChangesAsync(cancellationToken);
 
         // Broadcast to other devices

src/NexusReader.Infrastructure/RealTime/SyncHub.cs

@@ -15,12 +15,12 @@ public class SyncHub : Hub
         _mediator = mediator;
     }
 
-    public async Task UpdateProgress(string pageId)
+    public async Task UpdateProgress(string pageId, Guid ebookId, double progress, string? chapterTitle)
     {
         var userId = Context.UserIdentifier;
         if (!string.IsNullOrEmpty(userId))
         {
-            await _mediator.Send(new UpdateReadingProgressCommand(pageId, userId, Context.ConnectionId));
+            await _mediator.Send(new UpdateReadingProgressCommand(pageId, userId, ebookId, progress, chapterTitle, Context.ConnectionId));
         }
     }
 

src/NexusReader.Infrastructure/Services/EpubService.cs

@@ -4,14 +4,23 @@ using FluentResults;
 using NexusReader.Application.Abstractions.Services;
 using NexusReader.Application.Queries.Reader;
 using VersOne.Epub;
+using Microsoft.EntityFrameworkCore;
+using NexusReader.Data.Persistence;
+using NexusReader.Domain.Entities;
 
 namespace NexusReader.Infrastructure.Services;
 
 public class EpubService : IEpubService
 {
+    private readonly IDbContextFactory<AppDbContext> _dbContextFactory;
     private const string EpubPath = "wwwroot/assets/book.epub";
     private const int WordThreshold = 1000;
 
+    public EpubService(IDbContextFactory<AppDbContext> dbContextFactory)
+    {
+        _dbContextFactory = dbContextFactory;
+    }
+
     public async Task<Result<ReaderPageViewModel>> GetEpubContentAsync(int chapterIndex)
     {
         try
@@ -100,7 +109,14 @@ public class EpubService : IEpubService
                 blocks.Add(CreateAiTrigger($"trigger-{blockCounter++}"));
             }
 
-            return Result.Ok(new ReaderPageViewModel(blocks, chapterIndex, readingOrder.Count, chapterTitle));
+            // Find the EbookId from DB for this file
+            using var context = await _dbContextFactory.CreateDbContextAsync();
+            var ebookId = await context.Ebooks
+                .Where(e => e.FilePath.Contains("book.epub"))
+                .Select(e => e.Id)
+                .FirstOrDefaultAsync();
+
+            return Result.Ok(new ReaderPageViewModel(blocks, chapterIndex, readingOrder.Count, chapterTitle, ebookId));
         }
         catch (Exception ex)
         {