Initial commit: NexusArchitect Professional Workstation Overhaul

src/NexusReader.Application/Abstractions/Messaging/ICommand.cs

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+using FluentResults;
+using MediatR;
+
+namespace NexusReader.Application.Abstractions.Messaging;
+
+public interface ICommand : IRequest<Result>
+{
+}
+
+public interface ICommand<TResponse> : IRequest<Result<TResponse>>
+{
+}

src/NexusReader.Application/Abstractions/Messaging/ICommandHandler.cs

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+using FluentResults;
+using MediatR;
+
+namespace NexusReader.Application.Abstractions.Messaging;
+
+public interface ICommandHandler<TCommand> : IRequestHandler<TCommand, Result>
+    where TCommand : ICommand
+{
+}
+
+public interface ICommandHandler<TCommand, TResponse> : IRequestHandler<TCommand, Result<TResponse>>
+    where TCommand : ICommand<TResponse>
+{
+}

src/NexusReader.Application/Abstractions/Messaging/IQuery.cs

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+using FluentResults;
+using MediatR;
+
+namespace NexusReader.Application.Abstractions.Messaging;
+
+public interface IQuery<TResponse> : IRequest<Result<TResponse>>
+{
+}

src/NexusReader.Application/Abstractions/Messaging/IQueryHandler.cs

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+using FluentResults;
+using MediatR;
+
+namespace NexusReader.Application.Abstractions.Messaging;
+
+public interface IQueryHandler<TQuery, TResponse> : IRequestHandler<TQuery, Result<TResponse>>
+    where TQuery : IQuery<TResponse>
+{
+}

src/NexusReader.Application/Abstractions/Services/IAiGenerateQuizService.cs

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+using FluentResults;
+using NexusReader.Application.Queries.Quiz;
+
+namespace NexusReader.Application.Abstractions.Services;
+
+public interface IAiGenerateQuizService
+{
+    Task<Result<QuizDto>> GenerateQuizAsync(string contextBlockId, CancellationToken cancellationToken = default);
+}

src/NexusReader.Application/Abstractions/Services/INativeStorageService.cs

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+using FluentResults;
+
+namespace NexusReader.Application.Abstractions.Services;
+
+public interface INativeStorageService
+{
+    Result SaveString(string key, string value);
+    Result<string?> GetString(string key);
+    Result SaveBool(string key, bool value);
+    Result<bool> GetBool(string key, bool defaultValue = false);
+    Result Remove(string key);
+}

src/NexusReader.Application/Abstractions/Services/IPlatformService.cs

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+using FluentResults;
+
+namespace NexusReader.Application.Abstractions.Services;
+
+public interface IPlatformService
+{
+    Task<Result> VibrateSuccessAsync();
+    Task<Result> VibrateErrorAsync();
+    Task<Result> VibrateAsync(int milliseconds);
+    Result<DeviceContext> GetDeviceContext();
+}
+
+public record DeviceContext(
+    string Model, 
+    string Manufacturer, 
+    DeviceType DeviceType, 
+    DisplayOrientation Orientation
+);
+
+public enum DeviceType
+{
+    Unknown,
+    Phone,
+    Tablet,
+    Desktop
+}
+
+public enum DisplayOrientation
+{
+    Unknown,
+    Portrait,
+    Landscape
+}