refactor: update reader page query handler to depend on IEpubReader interface

src/NexusReader.Application/Queries/Reader/GetReaderPageQueryHandler.cs

@@ -4,17 +4,17 @@ using NexusReader.Application.Abstractions.Services;
 
 namespace NexusReader.Application.Queries.Reader;
 
-internal sealed class GetReaderPageQueryHandler : IQueryHandler<GetReaderPageQuery, ReaderPageViewModel>
+public class GetReaderPageQueryHandler : IQueryHandler<GetReaderPageQuery, ReaderPageViewModel>
 {
-    private readonly IEpubService _epubService;
+    private readonly IEpubReader _epubReader;
 
-    public GetReaderPageQueryHandler(IEpubService epubService)
+    public GetReaderPageQueryHandler(IEpubReader epubReader)
     {
-        _epubService = epubService;
+        _epubReader = epubReader;
     }
 
     public async Task<Result<ReaderPageViewModel>> Handle(GetReaderPageQuery request, CancellationToken cancellationToken)
     {
-        return await _epubService.GetEpubContentAsync(request.ChapterIndex, request.UserId);
+        return await _epubReader.GetEpubContentAsync(request.ChapterIndex, request.UserId);
     }
 }