src/NexusReader.Application/Commands/Sync/UpdateReadingProgressCommand.cs

@@ -9,4 +9,5 @@ public record UpdateReadingProgressCommand(
     Guid EbookId, 
     double Progress, 
     string? ChapterTitle,
+    int ChapterIndex,
     string? ExcludedConnectionId = null) : IRequest<Result>;

src/NexusReader.Application/DTOs/User/UserProfileDto.cs

@@ -27,4 +27,5 @@ public record LastReadBookDto
     public string? CoverUrl { get; init; }
     public double Progress { get; init; }
     public string? LastChapter { get; init; }
+    public int LastChapterIndex { get; init; }
 }

src/NexusReader.Application/Queries/User/GetUserProfileQueryHandler.cs

@@ -46,7 +46,8 @@ public class GetUserProfileQueryHandler : IRequestHandler<GetUserProfileQuery, R
                     },
                     CoverUrl = e.CoverUrl,
                     Progress = e.Progress,
-                    LastChapter = e.LastChapter ?? "Rozpoczynanie..."
+                    LastChapter = e.LastChapter ?? "Rozpoczynanie...",
+                    LastChapterIndex = e.LastChapterIndex
                 }).FirstOrDefault()
             })
             .FirstOrDefaultAsync(cancellationToken);

src/NexusReader.Domain/Entities/Ebook.cs

@@ -39,6 +39,8 @@ public class Ebook
     [MaxLength(255)]
     public string? LastChapter { get; set; }
 
+    public int LastChapterIndex { get; set; } = 0;
+
     // Relationship to NexusUser
     [Required]
     public string UserId { get; set; } = string.Empty;

src/NexusReader.Infrastructure/Handlers/UpdateReadingProgressCommandHandler.cs

@@ -41,6 +41,7 @@ public class UpdateReadingProgressCommandHandler : IRequestHandler<UpdateReading
         {
             ebook.Progress = request.Progress;
             ebook.LastChapter = request.ChapterTitle;
+            ebook.LastChapterIndex = request.ChapterIndex;
             ebook.LastReadDate = now;
         }
 

src/NexusReader.Infrastructure/RealTime/SyncHub.cs

@@ -2,6 +2,7 @@ using MediatR;
 using Microsoft.AspNetCore.SignalR;
 using Microsoft.AspNetCore.Authorization;
 using NexusReader.Application.Commands.Sync;
+using System.Security.Claims;
 
 namespace NexusReader.Infrastructure.RealTime;
 
@@ -15,12 +16,12 @@ public class SyncHub : Hub
         _mediator = mediator;
     }
 
-    public async Task UpdateProgress(string pageId, Guid ebookId, double progress, string? chapterTitle)
+    public async Task UpdateProgress(string pageId, Guid ebookId, double progress, string? chapterTitle, int chapterIndex)
     {
-        var userId = Context.UserIdentifier;
-        if (!string.IsNullOrEmpty(userId))
+        var userId = Context.User?.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+        if (userId != null)
         {
-            await _mediator.Send(new UpdateReadingProgressCommand(pageId, userId, ebookId, progress, chapterTitle, Context.ConnectionId));
+            await _mediator.Send(new UpdateReadingProgressCommand(pageId, userId, ebookId, progress, chapterTitle, chapterIndex, Context.ConnectionId));
         }
     }
 

src/NexusReader.UI.Shared/Components/Organisms/ReaderCanvas.razor

@@ -130,7 +130,8 @@
                 blockId, 
                 ViewModel.EbookId, 
                 progress, 
-                ViewModel.ChapterTitle);
+                ViewModel.ChapterTitle,
+                ViewModel.CurrentChapterIndex);
         }
     }
 

src/NexusReader.UI.Shared/NexusReader.UI.Shared.csproj

@@ -12,6 +12,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Components.Authorization" Version="10.0.7" />
     <PackageReference Include="Microsoft.AspNetCore.Components.Web" Version="10.0.7" />
     <PackageReference Include="MediatR" Version="12.1.1" />
+    <PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="10.0.7" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.7" />
     <PackageReference Include="Microsoft.AspNetCore.SignalR.Client" Version="10.0.7" />
   </ItemGroup>

src/NexusReader.UI.Shared/Pages/Dashboard.razor

@@ -56,18 +56,18 @@
                             <div class="progress-section">
                                 <span class="chapter-label">@_profile.LastReadBook.LastChapter</span>
                                 <div class="progress-container">
-                                    <div class="progress-bar" style="width: @(_profile.LastReadBook.Progress)%">
-                                        <div class="progress-bubble">@(_profile.LastReadBook.Progress)%</div>
+                                    <div class="progress-bar" style="width: @(_profile.LastReadBook.Progress.ToString("F0", System.Globalization.CultureInfo.InvariantCulture))%">
+                                        <div class="progress-bubble">@(_profile.LastReadBook.Progress.ToString("F1"))%</div>
                                     </div>
                                 </div>
-                                <span class="progress-detail">Postęp: @(_profile.LastReadBook.Progress)% - @_profile.LastReadBook.Author.Name</span>
+                                <span class="progress-detail">Postęp: @(_profile.LastReadBook.Progress.ToString("F2"))% - @_profile.LastReadBook.Author.Name</span>
                             </div>
                             <p class="reading-desc">
                                 Kontynuuj odkrywanie wiedzy w książce "@_profile.LastReadBook.Title". 
                                 Twój cyfrowy asystent Nexus jest gotowy do analizy kolejnych rozdziałów i generowania interaktywnych map myśli.
                             </p>
                             <div class="card-actions">
-                                <button class="btn-nexus primary" @onclick='() => NavigationManager.NavigateTo("/reader")'>Kontynuuj Czytanie</button>
+                                <button class="btn-nexus primary" @onclick='() => NavigationManager.NavigateTo($"/reader?chapter={_profile.LastReadBook.LastChapterIndex}")'>Kontynuuj Czytanie</button>
                                 <button class="btn-nexus secondary" @onclick='() => NavigationManager.NavigateTo("/library")'>Moja Biblioteka</button>
                             </div>
                         </div>

src/NexusReader.UI.Shared/Pages/Home.razor

@@ -6,6 +6,8 @@
 @inject IQuizStateService QuizState
 @inject IFocusModeService FocusMode
 @inject IJSRuntime JS
+@inject NavigationManager NavManager
+@inject IReaderNavigationService NavService
 <PageTitle>Nexus E-Reader</PageTitle>
 
 <div class="home-reader-container">
@@ -26,6 +28,16 @@
         QuizState.OnQuizRequested += HandleQuizRequestedAsync;
         FocusMode.OnFocusModeChanged += HandleUpdate;
         await FocusMode.InitializeAsync();
+
+        // Handle deep-linking to a specific chapter
+        var uri = NavManager.ToAbsoluteUri(NavManager.Uri);
+        if (Microsoft.AspNetCore.WebUtilities.QueryHelpers.ParseQuery(uri.Query).TryGetValue("chapter", out var chapterValue))
+        {
+            if (int.TryParse(chapterValue, out var chapterIndex))
+            {
+                await NavService.GoToChapter(chapterIndex);
+            }
+        }
     }
 
     protected override async Task OnAfterRenderAsync(bool firstRender)

src/NexusReader.UI.Shared/Services/ISyncService.cs

@@ -5,7 +5,7 @@ namespace NexusReader.UI.Shared.Services;
 public interface ISyncService
 {
     Task<Result> InitializeAsync();
-    Task<Result> UpdateProgressAsync(string pageId, Guid ebookId, double progress, string? chapterTitle);
+    Task<Result> UpdateProgressAsync(string pageId, Guid ebookId, double progress, string? chapterTitle, int chapterIndex);
     event Func<string, DateTime, Task> OnProgressReceived;
     Task DisposeAsync();
 }

src/NexusReader.UI.Shared/Services/SyncService.cs

@@ -64,7 +64,7 @@ public class SyncService : ISyncService, IAsyncDisposable
 
     private string? _lastSentPageId;
 
-    public async Task<Result> UpdateProgressAsync(string pageId, Guid ebookId, double progress, string? chapterTitle)
+    public async Task<Result> UpdateProgressAsync(string pageId, Guid ebookId, double progress, string? chapterTitle, int chapterIndex)
     {
         if (pageId == _lastSentPageId) return Result.Ok();