From 29a8b935fb2a96315d72f4dbb738a1e29ac1d037 Mon Sep 17 00:00:00 2001
From: bulava92 <bulava92@bk.ru>
Date: Wed, 28 Oct 2026 16:04:52 +0300
Subject: [PATCH] Add Windows desktop app

---
 .github/workflows/windows-build.yml    |  35 ++
 .gitignore                             |   1 +
 README.md                              |   6 +-
 Windows/README.md                      |  28 +-
 Windows/SHD.Windows.sln                |  18 +
 Windows/SHD.Windows/App.xaml           |  50 ++
 Windows/SHD.Windows/App.xaml.cs        | 137 +++++
 Windows/SHD.Windows/BrowserTab.cs      |  13 +
 Windows/SHD.Windows/DesktopAuthFlow.cs |  81 +++
 Windows/SHD.Windows/MainWindow.xaml    |  92 +++
 Windows/SHD.Windows/MainWindow.xaml.cs | 796 +++++++++++++++++++++++++
 Windows/SHD.Windows/SHD.Windows.csproj |  19 +
 Windows/SHD.Windows/SettingsStore.cs   |  39 ++
 Windows/SHD.Windows/ShdEnvironment.cs  |  32 +
 Windows/SHD.Windows/app.manifest       |  16 +
 Windows/Scripts/build.ps1              |  24 +
 Windows/Scripts/install.ps1            |  43 ++
 Windows/Scripts/uninstall.ps1          |  16 +
 18 files changed, 1444 insertions(+), 2 deletions(-)
 create mode 100644 .github/workflows/windows-build.yml
 create mode 100644 Windows/SHD.Windows.sln
 create mode 100644 Windows/SHD.Windows/App.xaml
 create mode 100644 Windows/SHD.Windows/App.xaml.cs
 create mode 100644 Windows/SHD.Windows/BrowserTab.cs
 create mode 100644 Windows/SHD.Windows/DesktopAuthFlow.cs
 create mode 100644 Windows/SHD.Windows/MainWindow.xaml
 create mode 100644 Windows/SHD.Windows/MainWindow.xaml.cs
 create mode 100644 Windows/SHD.Windows/SHD.Windows.csproj
 create mode 100644 Windows/SHD.Windows/SettingsStore.cs
 create mode 100644 Windows/SHD.Windows/ShdEnvironment.cs
 create mode 100644 Windows/SHD.Windows/app.manifest
 create mode 100644 Windows/Scripts/build.ps1
 create mode 100644 Windows/Scripts/install.ps1
 create mode 100644 Windows/Scripts/uninstall.ps1

diff --git a/.github/workflows/windows-build.yml b/.github/workflows/windows-build.yml
new file mode 100644
index 0000000..716dfd8
--- /dev/null
+++ b/.github/workflows/windows-build.yml
@@ -0,0 +1,35 @@
+name: Windows desktop build
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [main]
+    paths:
+      - 'Windows/**'
+      - '.github/workflows/windows-build.yml'
+
+permissions:
+  contents: read
+
+jobs:
+  publish:
+    runs-on: windows-latest
+    steps:
+      - name: Check out source
+        uses: actions/checkout@v4
+
+      - name: Install .NET SDK
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: 10.0.x
+
+      - name: Publish Windows app
+        shell: pwsh
+        run: ./Windows/Scripts/build.ps1
+
+      - name: Upload Windows package
+        uses: actions/upload-artifact@v4
+        with:
+          name: SHD-Windows-x64
+          path: Windows/dist/SHD-Windows-x64.zip
+          if-no-files-found: error
diff --git a/.gitignore b/.gitignore
index df10ab6..30cc244 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ Windows/bin/
 Windows/obj/
 Windows/.vs/
 Windows/publish/
+Windows/dist/
diff --git a/README.md b/README.md
index dc70208..41f3ed0 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 ## Папки
 
 - `Apple/` — приложение macOS на Swift и WKWebView.
-- `Windows/` — место для версии Windows.
+- `Windows/` — приложение Windows на WPF и WebView2, установочные сценарии и инструкция.
 
 ## Вход в macOS-приложении
 
@@ -18,6 +18,10 @@
 
 Код должен быть одноразовым, связанным с PKCE и действовать не более 60 секунд. Callback URI фиксирован в приложении. Маршрут завершения должен принимать только такой код и verifier; исключение CSRF-защиты допустимо только для этого маршрута при обязательной проверке кода и PKCE.
 
+## Windows-приложение
+
+Windows-клиент находится в `Windows/`. Он открывает сайт в WebView2 и запускает passkey-вход по той же кнопке на странице, что и macOS-версия. Сборка создаётся GitHub Actions workflow **Windows desktop build**; инструкция по установке и получению архива находится в [`Windows/README.md`](Windows/README.md).
+
 ## Сборка macOS-приложения
 
 Из каталога `Apple/` запустить `./Scripts/build-app.sh`. Сборка создаёт проверенный архив `Apple/dist/SHD-macOS-arm64.zip` и не устанавливает приложение в `/Applications`.
diff --git a/Windows/README.md b/Windows/README.md
index 5d6c741..176d24b 100644
--- a/Windows/README.md
+++ b/Windows/README.md
@@ -1,3 +1,29 @@
 # SHD для Windows
 
-Здесь будет исходный код Windows-версии SHD. Планируемая оболочка — отдельное Windows-приложение с WebView2 и переключением DEV/PROD.
+Windows-клиент — отдельное WPF-приложение на .NET 10 с Microsoft Edge WebView2. Оно хранит профиль сайта локально, поддерживает DEV и PROD, вкладки и окна, загрузки, печать, масштаб, системные диалоги сайта, доступ к камере и микрофону для доменов SHD и инструменты разработчика.
+
+## Установка
+
+1. Скачайте `SHD-Windows-x64.zip` из артефактов последней сборки **Windows desktop build** в GitHub Actions и распакуйте архив.
+2. Откройте PowerShell в распакованной папке и выполните `powershell -ExecutionPolicy Bypass -File .\install.ps1`. Скрипт установит приложение в `%LOCALAPPDATA%\Programs\SHD`, добавит ярлык в меню «Пуск» и зарегистрирует адрес возврата `shd-auth://callback`.
+3. Запустите SHD из меню «Пуск».
+
+Нужен Microsoft Edge WebView2 Runtime. Обычно он уже установлен вместе с Microsoft Edge; если его нет, приложение откроет страницу установки Runtime.
+
+Для удаления запустите `uninstall.ps1` из распакованной папки или папки установки. Данные сайта и профиль WebView2 остаются в `%LOCALAPPDATA%\SHDDesktop`.
+
+## Вход по passkey
+
+Вход начинается нажатием штатной кнопки passkey на странице SHD. Приложение перехватывает только `#btnPasskeyLogin` и `#twoFactorPasskey` на страницах входа, открывает авторизацию в системном браузере и принимает ответ через `shd-auth://callback`. Одноразовый код и PKCE verifier отправляются POST-запросом в WebView2, чтобы сессионная cookie осталась в профиле приложения.
+
+Этот серверный поток сейчас подключён только на DEV. На PROD приложение сообщает об этом и не начинает отдельную авторизацию.
+
+## Сборка
+
+На Windows с установленным .NET 10 SDK запустите из PowerShell:
+
+```powershell
+./Windows/Scripts/build.ps1
+```
+
+Скрипт публикует автономное приложение для `win-x64` и создаёт `Windows/dist/SHD-Windows-x64.zip`. .NET не требуется устанавливать на компьютере пользователя; WebView2 Runtime нужен отдельно.
diff --git a/Windows/SHD.Windows.sln b/Windows/SHD.Windows.sln
new file mode 100644
index 0000000..c1f2acd
--- /dev/null
+++ b/Windows/SHD.Windows.sln
@@ -0,0 +1,18 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SHD.Windows", "SHD.Windows\SHD.Windows.csproj", "{C4A2FC67-73BD-4E76-85C1-2F2F43C7EC71}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{C4A2FC67-73BD-4E76-85C1-2F2F43C7EC71}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C4A2FC67-73BD-4E76-85C1-2F2F43C7EC71}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C4A2FC67-73BD-4E76-85C1-2F2F43C7EC71}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C4A2FC67-73BD-4E76-85C1-2F2F43C7EC71}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal
diff --git a/Windows/SHD.Windows/App.xaml b/Windows/SHD.Windows/App.xaml
new file mode 100644
index 0000000..fcd5e2d
--- /dev/null
+++ b/Windows/SHD.Windows/App.xaml
@@ -0,0 +1,50 @@
+<Application x:Class="SHD.Windows.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             ShutdownMode="OnLastWindowClose">
+    <Application.Resources>
+        <SolidColorBrush x:Key="ShellBackground" Color="#171717" />
+        <SolidColorBrush x:Key="ShellSurface" Color="#222222" />
+        <SolidColorBrush x:Key="ShellForeground" Color="#E8E8E8" />
+        <SolidColorBrush x:Key="ShellMuted" Color="#A8A8A8" />
+        <Style TargetType="MenuItem">
+            <Setter Property="Foreground" Value="{StaticResource ShellForeground}" />
+            <Setter Property="Background" Value="{StaticResource ShellSurface}" />
+            <Setter Property="Padding" Value="10,5" />
+        </Style>
+        <Style TargetType="Button">
+            <Setter Property="Foreground" Value="{StaticResource ShellForeground}" />
+            <Setter Property="Background" Value="#303030" />
+            <Setter Property="BorderBrush" Value="#454545" />
+            <Setter Property="BorderThickness" Value="1" />
+            <Setter Property="Padding" Value="10,5" />
+            <Setter Property="Margin" Value="3,0" />
+            <Setter Property="Cursor" Value="Hand" />
+        </Style>
+        <Style TargetType="ComboBox">
+            <Setter Property="Foreground" Value="{StaticResource ShellForeground}" />
+            <Setter Property="Background" Value="#292929" />
+            <Setter Property="BorderBrush" Value="#454545" />
+            <Setter Property="Padding" Value="8,4" />
+        </Style>
+        <Style TargetType="ComboBoxItem">
+            <Setter Property="Foreground" Value="{StaticResource ShellForeground}" />
+            <Setter Property="Background" Value="#292929" />
+            <Setter Property="Padding" Value="8,5" />
+            <Style.Triggers>
+                <Trigger Property="IsHighlighted" Value="True">
+                    <Setter Property="Background" Value="#3A3A3A" />
+                </Trigger>
+                <Trigger Property="IsSelected" Value="True">
+                    <Setter Property="Background" Value="#454545" />
+                </Trigger>
+            </Style.Triggers>
+        </Style>
+        <Style TargetType="TabItem">
+            <Setter Property="Foreground" Value="{StaticResource ShellForeground}" />
+            <Setter Property="Background" Value="#222222" />
+            <Setter Property="BorderBrush" Value="#303030" />
+            <Setter Property="Padding" Value="10,6" />
+        </Style>
+    </Application.Resources>
+</Application>
diff --git a/Windows/SHD.Windows/App.xaml.cs b/Windows/SHD.Windows/App.xaml.cs
new file mode 100644
index 0000000..426a55a
--- /dev/null
+++ b/Windows/SHD.Windows/App.xaml.cs
@@ -0,0 +1,137 @@
+using System.IO.Pipes;
+using System.Text;
+using System.Windows;
+using System.Windows.Threading;
+
+namespace SHD.Windows;
+
+public partial class App : Application
+{
+    private const string MutexName = @"Local\SHD.Desktop.Windows";
+    private const string PipeName = "SHD.Desktop.Windows.Auth";
+    private static readonly UTF8Encoding Utf8WithoutBom = new(encoderShouldEmitUTF8Identifier: false);
+    private Mutex? _instanceMutex;
+    private bool _ownsMutex;
+    private MainWindow? _mainWindow;
+    private readonly CancellationTokenSource _pipeCancellation = new();
+
+    protected override async void OnStartup(StartupEventArgs e)
+    {
+        base.OnStartup(e);
+
+        _instanceMutex = new Mutex(initiallyOwned: true, MutexName, out _ownsMutex);
+        if (!_ownsMutex)
+        {
+            var command = e.Args.FirstOrDefault(IsDesktopAuthCallback) ?? "activate";
+            await ForwardToPrimaryInstanceAsync(command);
+            Shutdown();
+            return;
+        }
+
+        _mainWindow = new MainWindow();
+        MainWindow = _mainWindow;
+        _mainWindow.Show();
+        _ = ListenForSecondInstanceAsync(_pipeCancellation.Token);
+
+        var callback = e.Args.FirstOrDefault(IsDesktopAuthCallback);
+        if (callback is not null)
+        {
+            await _mainWindow.Dispatcher.InvokeAsync(() => _mainWindow.HandleAuthCallback(callback), DispatcherPriority.Loaded);
+        }
+    }
+
+    protected override void OnExit(ExitEventArgs e)
+    {
+        _pipeCancellation.Cancel();
+        if (_ownsMutex)
+        {
+            try { _instanceMutex?.ReleaseMutex(); }
+            catch (ApplicationException) { }
+        }
+        _instanceMutex?.Dispose();
+        _pipeCancellation.Dispose();
+        base.OnExit(e);
+    }
+
+    private async Task ListenForSecondInstanceAsync(CancellationToken cancellationToken)
+    {
+        while (!cancellationToken.IsCancellationRequested)
+        {
+            try
+            {
+                await using var server = new NamedPipeServerStream(
+                    PipeName,
+                    PipeDirection.In,
+                    1,
+                    PipeTransmissionMode.Byte,
+                    PipeOptions.Asynchronous | PipeOptions.CurrentUserOnly);
+                await server.WaitForConnectionAsync(cancellationToken);
+                using var reader = new StreamReader(server, Utf8WithoutBom, detectEncodingFromByteOrderMarks: false, bufferSize: 1024, leaveOpen: true);
+                var message = await reader.ReadLineAsync(cancellationToken);
+                if (string.IsNullOrWhiteSpace(message)) continue;
+
+                await Dispatcher.InvokeAsync(() =>
+                {
+                    var windows = Application.Current.Windows.OfType<MainWindow>().ToArray();
+                    if (IsDesktopAuthCallback(message))
+                    {
+                        var authWindow = windows.FirstOrDefault(window => window.CanHandleAuthCallback(message));
+                        if (authWindow is not null)
+                        {
+                            if (authWindow.WindowState == WindowState.Minimized) authWindow.WindowState = WindowState.Normal;
+                            authWindow.Activate();
+                            authWindow.HandleAuthCallback(message);
+                            return;
+                        }
+                    }
+
+                    var fallbackWindow = windows.FirstOrDefault() ?? _mainWindow;
+                    if (fallbackWindow is null) return;
+                    if (fallbackWindow.WindowState == WindowState.Minimized) fallbackWindow.WindowState = WindowState.Normal;
+                    fallbackWindow.Activate();
+                    if (IsDesktopAuthCallback(message)) fallbackWindow.HandleAuthCallback(message);
+                });
+            }
+            catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+            {
+                return;
+            }
+            catch (IOException)
+            {
+                if (!cancellationToken.IsCancellationRequested) await Task.Delay(150, cancellationToken);
+            }
+            catch (ObjectDisposedException) when (cancellationToken.IsCancellationRequested)
+            {
+                return;
+            }
+        }
+    }
+
+    private static async Task ForwardToPrimaryInstanceAsync(string command)
+    {
+        for (var attempt = 0; attempt < 12; attempt++)
+        {
+            try
+            {
+                await using var client = new NamedPipeClientStream(".", PipeName, PipeDirection.Out, PipeOptions.Asynchronous);
+                await client.ConnectAsync(500);
+                await using var writer = new StreamWriter(client, Utf8WithoutBom, bufferSize: 1024, leaveOpen: true);
+                await writer.WriteLineAsync(command);
+                await writer.FlushAsync();
+                return;
+            }
+            catch (IOException)
+            {
+                await Task.Delay(150);
+            }
+            catch (TimeoutException)
+            {
+                await Task.Delay(150);
+            }
+        }
+    }
+
+    private static bool IsDesktopAuthCallback(string value) =>
+        Uri.TryCreate(value, UriKind.Absolute, out var uri) &&
+        uri.Scheme.Equals("shd-auth", StringComparison.OrdinalIgnoreCase);
+}
diff --git a/Windows/SHD.Windows/BrowserTab.cs b/Windows/SHD.Windows/BrowserTab.cs
new file mode 100644
index 0000000..e281779
--- /dev/null
+++ b/Windows/SHD.Windows/BrowserTab.cs
@@ -0,0 +1,13 @@
+using Microsoft.Web.WebView2.Wpf;
+using System.Windows.Controls;
+
+namespace SHD.Windows;
+
+internal sealed class BrowserTab(WebView2 view, TabItem item, ProgressBar progress, TextBlock title, ShdEnvironment environment)
+{
+    public WebView2 View { get; } = view;
+    public TabItem Item { get; } = item;
+    public ProgressBar Progress { get; } = progress;
+    public TextBlock Title { get; } = title;
+    public ShdEnvironment Environment { get; set; } = environment;
+}
diff --git a/Windows/SHD.Windows/DesktopAuthFlow.cs b/Windows/SHD.Windows/DesktopAuthFlow.cs
new file mode 100644
index 0000000..76e5aea
--- /dev/null
+++ b/Windows/SHD.Windows/DesktopAuthFlow.cs
@@ -0,0 +1,81 @@
+using System.Security.Cryptography;
+using System.Text;
+
+namespace SHD.Windows;
+
+internal sealed record DesktopAuthCallback(string Code, string State);
+
+internal static class DesktopAuthFlow
+{
+    public const string CallbackUri = "shd-auth://callback";
+    private const string ClientId = "shd-desktop";
+
+    public static PendingDesktopAuth Create(ShdEnvironment environment, BrowserTab targetTab)
+    {
+        var verifier = Base64Url(RandomNumberGenerator.GetBytes(32));
+        var state = Base64Url(RandomNumberGenerator.GetBytes(32));
+        var challenge = Base64Url(SHA256.HashData(Encoding.ASCII.GetBytes(verifier)));
+        var url = environment.BaseUrl() + "/desktop-auth/authorize" +
+                  "?client_id=" + Uri.EscapeDataString(ClientId) +
+                  "&redirect_uri=" + Uri.EscapeDataString(CallbackUri) +
+                  "&response_type=code" +
+                  "&state=" + Uri.EscapeDataString(state) +
+                  "&code_challenge=" + Uri.EscapeDataString(challenge) +
+                  "&code_challenge_method=S256";
+
+        return new PendingDesktopAuth(state, verifier, environment, targetTab, new Uri(url));
+    }
+
+    public static Uri CompleteUri(ShdEnvironment environment) =>
+        new(environment.BaseUrl() + "/desktop-auth/complete");
+
+    public static bool TryParseCallback(string value, out DesktopAuthCallback? callback, out bool serverReturnedError)
+    {
+        callback = null;
+        serverReturnedError = false;
+        if (!Uri.TryCreate(value, UriKind.Absolute, out var uri) ||
+            !uri.Scheme.Equals("shd-auth", StringComparison.OrdinalIgnoreCase) ||
+            !uri.Host.Equals("callback", StringComparison.OrdinalIgnoreCase) ||
+            uri.AbsolutePath is not ("" or "/") || uri.UserInfo.Length != 0 || uri.Port != -1 ||
+            uri.Fragment.Length != 0)
+            return false;
+
+        var values = new Dictionary<string, List<string>>(StringComparer.Ordinal);
+        foreach (var pair in uri.Query.TrimStart('?').Split('&', StringSplitOptions.RemoveEmptyEntries))
+        {
+            var separator = pair.IndexOf('=');
+            var name = Decode(separator < 0 ? pair : pair[..separator]);
+            var item = Decode(separator < 0 ? "" : pair[(separator + 1)..]);
+            if (!values.TryGetValue(name, out var list)) values[name] = list = [];
+            list.Add(item);
+        }
+
+        if (values.ContainsKey("error"))
+        {
+            if (values["error"].Count != 1 ||
+                !values.TryGetValue("state", out var errorStates) || errorStates.Count != 1 || string.IsNullOrWhiteSpace(errorStates[0]))
+                return false;
+            serverReturnedError = true;
+            callback = new DesktopAuthCallback("", errorStates[0]);
+            return true;
+        }
+
+        if (!values.TryGetValue("code", out var codes) || codes.Count != 1 || string.IsNullOrWhiteSpace(codes[0]) ||
+            !values.TryGetValue("state", out var states) || states.Count != 1 || string.IsNullOrWhiteSpace(states[0]))
+            return false;
+
+        callback = new DesktopAuthCallback(codes[0], states[0]);
+        return true;
+    }
+
+    public static string FormEncode(string value) => Uri.EscapeDataString(value).Replace("%20", "+", StringComparison.Ordinal);
+
+    private static string Decode(string value) => Uri.UnescapeDataString(value.Replace("+", " ", StringComparison.Ordinal));
+
+    private static string Base64Url(byte[] value) => Convert.ToBase64String(value)
+        .TrimEnd('=')
+        .Replace('+', '-')
+        .Replace('/', '_');
+}
+
+internal sealed record PendingDesktopAuth(string State, string Verifier, ShdEnvironment Environment, BrowserTab TargetTab, Uri AuthorizationUri);
diff --git a/Windows/SHD.Windows/MainWindow.xaml b/Windows/SHD.Windows/MainWindow.xaml
new file mode 100644
index 0000000..81a98fa
--- /dev/null
+++ b/Windows/SHD.Windows/MainWindow.xaml
@@ -0,0 +1,92 @@
+<Window x:Class="SHD.Windows.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="SHD" Width="1320" Height="860" MinWidth="900" MinHeight="560"
+        WindowStartupLocation="CenterScreen" Background="#171717" Foreground="#E8E8E8"
+        FontFamily="Segoe UI" FontSize="13"
+        Loaded="Window_Loaded" Closing="Window_Closing" PreviewKeyDown="Window_PreviewKeyDown">
+    <DockPanel LastChildFill="True">
+        <Menu DockPanel.Dock="Top" Background="#222222" Foreground="#E8E8E8">
+            <MenuItem Header="_Файл">
+                <MenuItem Header="Новая вкладка" InputGestureText="Ctrl+T" Click="NewTab_Click" />
+                <MenuItem Header="Новое окно" InputGestureText="Ctrl+N" Click="NewWindow_Click" />
+                <Separator />
+                <MenuItem Header="Печать…" InputGestureText="Ctrl+P" Click="Print_Click" />
+                <MenuItem Header="Открыть папку загрузок" Click="Downloads_Click" />
+                <Separator />
+                <MenuItem Header="Закрыть вкладку" InputGestureText="Ctrl+W" Click="CloseTab_Click" />
+                <MenuItem Header="Выход" Click="Exit_Click" />
+            </MenuItem>
+            <MenuItem Header="_Правка">
+                <MenuItem Header="Отменить" InputGestureText="Ctrl+Z" Click="Undo_Click" />
+                <MenuItem Header="Повторить" InputGestureText="Ctrl+Y" Click="Redo_Click" />
+                <Separator />
+                <MenuItem Header="Вырезать" InputGestureText="Ctrl+X" Click="Cut_Click" />
+                <MenuItem Header="Копировать" InputGestureText="Ctrl+C" Click="Copy_Click" />
+                <MenuItem Header="Вставить" InputGestureText="Ctrl+V" Click="Paste_Click" />
+                <MenuItem Header="Выбрать всё" InputGestureText="Ctrl+A" Click="SelectAll_Click" />
+            </MenuItem>
+            <MenuItem Header="_Вид">
+                <MenuItem Header="Назад" InputGestureText="Alt+Left" Click="Back_Click" />
+                <MenuItem Header="Вперёд" InputGestureText="Alt+Right" Click="Forward_Click" />
+                <Separator />
+                <MenuItem Header="Обновить" InputGestureText="Ctrl+R" Click="Reload_Click" />
+                <MenuItem Header="Очистить кэш и обновить" InputGestureText="Ctrl+Shift+R" Click="HardReload_Click" />
+                <Separator />
+                <MenuItem Header="Увеличить" InputGestureText="Ctrl++" Click="ZoomIn_Click" />
+                <MenuItem Header="Уменьшить" InputGestureText="Ctrl+-" Click="ZoomOut_Click" />
+                <MenuItem Header="Исходный масштаб" InputGestureText="Ctrl+0" Click="ZoomReset_Click" />
+                <MenuItem Header="Полноэкранный режим" InputGestureText="F11" Click="FullScreen_Click" />
+                <Separator />
+                <MenuItem Header="Инструменты разработчика" InputGestureText="F12" Click="DevTools_Click" />
+            </MenuItem>
+            <MenuItem Header="_Контур">
+                <MenuItem Header="SHD Production" Click="SelectProduction_Click" />
+                <MenuItem Header="SHD Dev" Click="SelectDev_Click" />
+            </MenuItem>
+            <MenuItem Header="_История">
+                <MenuItem Header="Назад" InputGestureText="Alt+Left" Click="Back_Click" />
+                <MenuItem Header="Вперёд" InputGestureText="Alt+Right" Click="Forward_Click" />
+            </MenuItem>
+        </Menu>
+
+        <Border DockPanel.Dock="Top" Background="#1C1C1C" BorderBrush="#303030" BorderThickness="0,0,0,1" Padding="8,7">
+            <Grid>
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="Auto" />
+                    <ColumnDefinition Width="Auto" />
+                    <ColumnDefinition Width="Auto" />
+                    <ColumnDefinition Width="16" />
+                    <ColumnDefinition Width="210" />
+                    <ColumnDefinition Width="*" />
+                    <ColumnDefinition Width="Auto" />
+                    <ColumnDefinition Width="Auto" />
+                    <ColumnDefinition Width="Auto" />
+                </Grid.ColumnDefinitions>
+                <Button x:Name="BackButton" Grid.Column="0" Content="←" Width="38" ToolTip="Назад" Click="Back_Click" />
+                <Button x:Name="ForwardButton" Grid.Column="1" Content="→" Width="38" ToolTip="Вперёд" Click="Forward_Click" />
+                <Button Grid.Column="2" Content="⟳" Width="38" ToolTip="Обновить" Click="Reload_Click" />
+                <ComboBox x:Name="EnvironmentPicker" Grid.Column="4" Height="32" Padding="8,4"
+                          SelectedValuePath="Tag" SelectionChanged="EnvironmentPicker_SelectionChanged"
+                          Background="#292929" Foreground="#E8E8E8" BorderBrush="#454545">
+                    <ComboBoxItem Content="SHD Production" Tag="Production" />
+                    <ComboBoxItem Content="SHD Dev" Tag="Dev" />
+                </ComboBox>
+                <TextBlock x:Name="PageTitle" Grid.Column="5" VerticalAlignment="Center" Margin="14,0,8,0"
+                           Foreground="#BDBDBD" TextTrimming="CharacterEllipsis" />
+                <Button Grid.Column="6" Content="Печать" Click="Print_Click" />
+                <Button Grid.Column="7" Content="Загрузки" Click="Downloads_Click" />
+                <Button Grid.Column="8" Content="Инструменты" Click="DevTools_Click" />
+            </Grid>
+        </Border>
+
+        <StatusBar DockPanel.Dock="Bottom" Background="#202020" Foreground="#BDBDBD" BorderBrush="#303030" BorderThickness="0,1,0,0">
+            <StatusBarItem><TextBlock x:Name="StatusText" Text="Готово" /></StatusBarItem>
+            <Separator />
+            <StatusBarItem><TextBlock x:Name="StatusEnvironment" Text="SHD Production" /></StatusBarItem>
+        </StatusBar>
+
+        <TabControl x:Name="Tabs" Background="#171717" BorderThickness="0"
+                    SelectionChanged="Tabs_SelectionChanged" />
+    </DockPanel>
+</Window>
diff --git a/Windows/SHD.Windows/MainWindow.xaml.cs b/Windows/SHD.Windows/MainWindow.xaml.cs
new file mode 100644
index 0000000..f756ac7
--- /dev/null
+++ b/Windows/SHD.Windows/MainWindow.xaml.cs
@@ -0,0 +1,796 @@
+using Microsoft.Web.WebView2.Core;
+using Microsoft.Web.WebView2.Wpf;
+using System.Diagnostics;
+using System.IO;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using System.Windows.Media;
+using DrawingColor = System.Drawing.Color;
+
+namespace SHD.Windows;
+
+public partial class MainWindow : Window
+{
+    private const string WebViewProfileFolder = "WebView2";
+    private static readonly Uri WebViewRuntimePage = new("https://developer.microsoft.com/microsoft-edge/webview2/");
+    private static readonly Lazy<Task<CoreWebView2Environment>> SharedWebViewEnvironment = new(CreateWebViewEnvironmentAsync);
+    private readonly List<BrowserTab> _tabs = [];
+    private readonly ShdEnvironment _initialEnvironment;
+    private CoreWebView2Environment? _webViewEnvironment;
+    private ShdEnvironment _selectedEnvironment;
+    private PendingDesktopAuth? _authAttempt;
+    private MemoryStream? _authPostData;
+    private WebView2? _authPostTarget;
+    private ulong? _authNavigationId;
+    private bool _suppressEnvironmentChange;
+    private bool _initialized;
+    private bool _closing;
+    private bool _isFullScreen;
+    private WindowStyle _previousWindowStyle;
+    private WindowState _previousWindowState;
+    private Rect _previousBounds;
+
+    public MainWindow(ShdEnvironment? initialEnvironment = null)
+    {
+        InitializeComponent();
+        _initialEnvironment = initialEnvironment ?? SettingsStore.LoadEnvironment();
+        _selectedEnvironment = _initialEnvironment;
+        EnvironmentPicker.IsEnabled = false;
+        Tabs.IsEnabled = false;
+    }
+
+    private BrowserTab? ActiveTab => Tabs.SelectedItem is TabItem item
+        ? _tabs.FirstOrDefault(tab => ReferenceEquals(tab.Item, item))
+        : null;
+
+    private async void Window_Loaded(object sender, RoutedEventArgs e)
+    {
+        if (_initialized) return;
+        _initialized = true;
+
+        try
+        {
+            _webViewEnvironment = await SharedWebViewEnvironment.Value;
+            SetEnvironmentPicker(_initialEnvironment);
+            EnvironmentPicker.IsEnabled = true;
+            Tabs.IsEnabled = true;
+            await AddTabAsync(_initialEnvironment);
+            StatusText.Text = "Готово";
+        }
+        catch (Exception)
+        {
+            var result = MessageBox.Show(
+                this,
+                "Не удалось запустить встроенный браузер SHD. Установите Microsoft Edge WebView2 Runtime и запустите приложение ещё раз.\n\nОткрыть страницу загрузки Runtime?",
+                "SHD — встроенный браузер",
+                MessageBoxButton.YesNo,
+                MessageBoxImage.Warning);
+            if (result == MessageBoxResult.Yes) OpenExternalUri(WebViewRuntimePage);
+            Close();
+        }
+    }
+
+    private static async Task<CoreWebView2Environment> CreateWebViewEnvironmentAsync()
+    {
+        var userDataFolder = Path.Combine(
+            Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
+            "SHDDesktop",
+            WebViewProfileFolder);
+        Directory.CreateDirectory(userDataFolder);
+        return await CoreWebView2Environment.CreateAsync(userDataFolder: userDataFolder);
+    }
+
+    private async Task<BrowserTab> AddTabAsync(ShdEnvironment environment, Uri? initialUri = null)
+    {
+        if (_webViewEnvironment is null)
+            throw new InvalidOperationException("WebView2 environment is not ready.");
+
+        var view = new WebView2
+        {
+            HorizontalAlignment = HorizontalAlignment.Stretch,
+            VerticalAlignment = VerticalAlignment.Stretch,
+            DefaultBackgroundColor = DrawingColor.FromArgb(18, 18, 18)
+        };
+        var progress = new ProgressBar
+        {
+            Height = 2,
+            IsIndeterminate = true,
+            Visibility = Visibility.Collapsed,
+            VerticalAlignment = VerticalAlignment.Top,
+            HorizontalAlignment = HorizontalAlignment.Stretch,
+            IsHitTestVisible = false,
+            Foreground = new SolidColorBrush(Color.FromRgb(84, 156, 255)),
+            Background = Brushes.Transparent
+        };
+        var content = new Grid { Background = new SolidColorBrush(Color.FromRgb(18, 18, 18)) };
+        content.Children.Add(view);
+        Panel.SetZIndex(progress, 1);
+        content.Children.Add(progress);
+
+        var item = new TabItem
+        {
+            Background = new SolidColorBrush(Color.FromRgb(34, 34, 34)),
+            Foreground = Brushes.White,
+            Content = content
+        };
+        var headerTitle = new TextBlock
+        {
+            Text = "SHD",
+            VerticalAlignment = VerticalAlignment.Center,
+            TextTrimming = TextTrimming.CharacterEllipsis,
+            MaxWidth = 210,
+            Margin = new Thickness(2, 0, 7, 0)
+        };
+        var closeButton = new Button
+        {
+            Content = "×",
+            Width = 22,
+            Height = 22,
+            Padding = new Thickness(0),
+            Margin = new Thickness(3, 0, 0, 0),
+            FontSize = 15,
+            ToolTip = "Закрыть вкладку",
+            VerticalAlignment = VerticalAlignment.Center
+        };
+        var header = new DockPanel { LastChildFill = true, Margin = new Thickness(2, 0, 2, 0) };
+        DockPanel.SetDock(closeButton, Dock.Right);
+        header.Children.Add(closeButton);
+        header.Children.Add(headerTitle);
+        item.Header = header;
+
+        var tab = new BrowserTab(view, item, progress, headerTitle, environment);
+        closeButton.Click += (_, _) => CloseTab(tab);
+        _tabs.Add(tab);
+        Tabs.Items.Add(item);
+        Tabs.SelectedItem = item;
+
+        await view.EnsureCoreWebView2Async(_webViewEnvironment);
+        await ConfigureBrowserAsync(tab);
+        view.CoreWebView2.Navigate((initialUri ?? new Uri(environment.BaseUrl())).AbsoluteUri);
+        UpdateWindowChrome();
+        return tab;
+    }
+
+    private async Task ConfigureBrowserAsync(BrowserTab tab)
+    {
+        var core = tab.View.CoreWebView2;
+        core.DefaultBackgroundColor = DrawingColor.FromArgb(18, 18, 18);
+        core.Settings.IsStatusBarEnabled = false;
+        core.Settings.AreDevToolsEnabled = true;
+        core.Settings.IsZoomControlEnabled = true;
+        core.Settings.IsPasswordAutosaveEnabled = true;
+        core.Settings.IsGeneralAutofillEnabled = true;
+        core.Settings.AreDefaultScriptDialogsEnabled = false;
+
+        core.NavigationStarting += Browser_NavigationStarting;
+        core.NavigationCompleted += Browser_NavigationCompleted;
+        core.DocumentTitleChanged += Browser_DocumentTitleChanged;
+        core.WebMessageReceived += Browser_WebMessageReceived;
+        core.NewWindowRequested += Browser_NewWindowRequested;
+        core.PermissionRequested += Browser_PermissionRequested;
+        core.DownloadStarting += Browser_DownloadStarting;
+        core.ScriptDialogOpening += Browser_ScriptDialogOpening;
+
+        await core.AddScriptToExecuteOnDocumentCreatedAsync("""
+            (() => {
+                const darkStyle = document.createElement('style');
+                darkStyle.id = '__shd_desktop_dark__';
+                darkStyle.textContent = 'html, body { background-color: #121212 !important; color: #e0e0e0 !important; }';
+                const parent = document.head || document.documentElement;
+                if (parent) parent.appendChild(darkStyle);
+                window.print = function () {
+                    if (window.chrome && window.chrome.webview) window.chrome.webview.postMessage('shd-print');
+                };
+            })();
+            """);
+
+        await core.AddScriptToExecuteOnDocumentCreatedAsync("""
+            (() => {
+                if (window.top !== window) return;
+                document.addEventListener('click', event => {
+                    let path = window.location.pathname;
+                    while (path.length > 1 && path.endsWith('/')) path = path.slice(0, -1);
+                    if (path !== '/login' && path !== '/login/two-factor') return;
+                    const target = event.target instanceof Element
+                        ? event.target
+                        : (event.target && event.target.parentElement);
+                    if (!target || !target.closest('#btnPasskeyLogin, #twoFactorPasskey')) return;
+
+                    event.preventDefault();
+                    event.stopPropagation();
+                    event.stopImmediatePropagation();
+                    if (window.chrome && window.chrome.webview) window.chrome.webview.postMessage('shd-passkey');
+                }, true);
+            })();
+            """);
+    }
+
+    private void Browser_NavigationStarting(object? sender, CoreWebView2NavigationStartingEventArgs e)
+    {
+        if (sender is not CoreWebView2 core) return;
+        var tab = _tabs.FirstOrDefault(candidate => ReferenceEquals(candidate.View.CoreWebView2, core));
+        if (tab is not null) tab.Progress.Visibility = Visibility.Visible;
+
+        if (!Uri.TryCreate(e.Uri, UriKind.Absolute, out var uri)) return;
+        if (tab is not null && ReferenceEquals(tab.View, _authPostTarget) &&
+            uri.AbsolutePath.Equals("/desktop-auth/complete", StringComparison.Ordinal))
+            _authNavigationId = e.NavigationId;
+        if (uri.Scheme is not ("https" or "http"))
+        {
+            e.Cancel = true;
+            if (e.IsUserInitiated) OpenExternalUri(uri);
+            return;
+        }
+
+        if (tab is not null)
+        {
+            if (ShdEnvironmentExtensions.IsDevelopmentHost(uri.Host)) tab.Environment = ShdEnvironment.Dev;
+            else if (ShdEnvironmentExtensions.IsProductionHost(uri.Host)) tab.Environment = ShdEnvironment.Production;
+            if (ReferenceEquals(tab, ActiveTab))
+            {
+                _selectedEnvironment = tab.Environment;
+                SetEnvironmentPicker(tab.Environment);
+                SettingsStore.SaveEnvironment(tab.Environment);
+                StatusEnvironment.Text = tab.Environment.DisplayName();
+            }
+        }
+
+        if (e.IsUserInitiated && !e.IsRedirected && !ShdEnvironmentExtensions.IsInternalHost(uri.Host))
+        {
+            e.Cancel = true;
+            OpenExternalUri(uri);
+        }
+    }
+
+    private void Browser_NavigationCompleted(object? sender, CoreWebView2NavigationCompletedEventArgs e)
+    {
+        if (sender is not CoreWebView2 core) return;
+        var tab = _tabs.FirstOrDefault(candidate => ReferenceEquals(candidate.View.CoreWebView2, core));
+        if (tab is not null) tab.Progress.Visibility = Visibility.Collapsed;
+        UpdateWindowChrome();
+
+        if (tab is not null && ReferenceEquals(_authPostTarget, tab.View) && _authNavigationId == e.NavigationId)
+        {
+            _authPostData?.Dispose();
+            _authPostData = null;
+            _authPostTarget = null;
+            _authNavigationId = null;
+            StatusText.Text = e.IsSuccess ? "Вход завершён" : "Не удалось завершить вход";
+        }
+    }
+
+    private void Browser_DocumentTitleChanged(object? sender, object e)
+    {
+        if (sender is not CoreWebView2 core) return;
+        var tab = _tabs.FirstOrDefault(candidate => ReferenceEquals(candidate.View.CoreWebView2, core));
+        if (tab is null) return;
+        var title = CleanTitle(core.DocumentTitle);
+        tab.Title.Text = title;
+        if (ReferenceEquals(tab, ActiveTab))
+        {
+            PageTitle.Text = title;
+            Title = $"{title} — SHD";
+        }
+    }
+
+    private async void Browser_WebMessageReceived(object? sender, CoreWebView2WebMessageReceivedEventArgs e)
+    {
+        if (sender is not WebView2 view || !Uri.TryCreate(e.Source, UriKind.Absolute, out var source) ||
+            source.Scheme != Uri.UriSchemeHttps || !ShdEnvironmentExtensions.IsInternalHost(source.Host))
+            return;
+
+        string message;
+        try { message = e.TryGetWebMessageAsString(); }
+        catch (InvalidOperationException) { return; }
+
+        if (message == "shd-print")
+        {
+            view.CoreWebView2.ShowPrintUI(CoreWebView2PrintDialogKind.Browser);
+            return;
+        }
+
+        if (message != "shd-passkey") return;
+        if (!(ShdEnvironmentExtensions.IsDevelopmentHost(source.Host) || ShdEnvironmentExtensions.IsProductionHost(source.Host))) return;
+        var tab = _tabs.FirstOrDefault(candidate => ReferenceEquals(candidate.View, view));
+        if (tab is null) return;
+        var environment = ShdEnvironmentExtensions.IsDevelopmentHost(source.Host)
+            ? ShdEnvironment.Dev
+            : ShdEnvironment.Production;
+        await BeginPasskeyLoginAsync(tab, environment);
+    }
+
+    private async void Browser_NewWindowRequested(object? sender, CoreWebView2NewWindowRequestedEventArgs e)
+    {
+        e.Handled = true;
+        if (!Uri.TryCreate(e.Uri, UriKind.Absolute, out var uri)) return;
+        if (uri.Scheme is "http" or "https" && ShdEnvironmentExtensions.IsInternalHost(uri.Host))
+        {
+            var environment = ShdEnvironmentExtensions.IsDevelopmentHost(uri.Host)
+                ? ShdEnvironment.Dev
+                : ShdEnvironmentExtensions.IsProductionHost(uri.Host)
+                    ? ShdEnvironment.Production
+                    : _selectedEnvironment;
+            await AddTabAsync(environment, uri);
+        }
+        else
+        {
+            OpenExternalUri(uri);
+        }
+    }
+
+    private void Browser_PermissionRequested(object? sender, CoreWebView2PermissionRequestedEventArgs e)
+    {
+        if (e.PermissionKind is not (CoreWebView2PermissionKind.Camera or CoreWebView2PermissionKind.Microphone)) return;
+        var trusted = Uri.TryCreate(e.Uri, UriKind.Absolute, out var origin) &&
+                      origin.Scheme == Uri.UriSchemeHttps && ShdEnvironmentExtensions.IsInternalHost(origin.Host);
+        if (trusted)
+        {
+            e.State = CoreWebView2PermissionState.Allow;
+        }
+        else
+        {
+            var label = e.PermissionKind == CoreWebView2PermissionKind.Camera ? "камеру" : "микрофон";
+            var allow = MessageBox.Show(
+                this,
+                $"Разрешить сайту {e.Uri} доступ к устройству ({label})?",
+                "Разрешение SHD",
+                MessageBoxButton.YesNo,
+                MessageBoxImage.Question) == MessageBoxResult.Yes;
+            e.State = allow ? CoreWebView2PermissionState.Allow : CoreWebView2PermissionState.Deny;
+        }
+        e.Handled = true;
+    }
+
+    private void Browser_DownloadStarting(object? sender, CoreWebView2DownloadStartingEventArgs e)
+    {
+        var downloadsFolder = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
+        downloadsFolder = Path.Combine(downloadsFolder, "Downloads");
+        Directory.CreateDirectory(downloadsFolder);
+        var suggestedName = Path.GetFileName(e.ResultFilePath);
+        if (string.IsNullOrWhiteSpace(suggestedName)) suggestedName = "download";
+        e.ResultFilePath = GetUniquePath(Path.Combine(downloadsFolder, suggestedName));
+        e.Handled = true;
+        StatusText.Text = $"Загрузка: {suggestedName}";
+        e.DownloadOperation.StateChanged += (_, _) =>
+        {
+            Dispatcher.InvokeAsync(() =>
+            {
+                if (e.DownloadOperation.State == CoreWebView2DownloadState.Completed)
+                    StatusText.Text = $"Загружено: {Path.GetFileName(e.ResultFilePath)}";
+                else if (e.DownloadOperation.State == CoreWebView2DownloadState.Interrupted)
+                    StatusText.Text = "Загрузка прервана";
+            });
+        };
+    }
+
+    private void Browser_ScriptDialogOpening(object? sender, CoreWebView2ScriptDialogOpeningEventArgs e)
+    {
+        switch (e.Kind)
+        {
+            case CoreWebView2ScriptDialogKind.Alert:
+                MessageBox.Show(this, e.Message, "SHD", MessageBoxButton.OK, MessageBoxImage.Information);
+                e.Accept();
+                break;
+            case CoreWebView2ScriptDialogKind.Confirm:
+            case CoreWebView2ScriptDialogKind.BeforeUnload:
+                if (MessageBox.Show(this, e.Message, "SHD", MessageBoxButton.YesNo, MessageBoxImage.Question) == MessageBoxResult.Yes)
+                    e.Accept();
+                break;
+            case CoreWebView2ScriptDialogKind.Prompt:
+                var answer = ShowPrompt(e.Message, e.DefaultText);
+                if (answer is not null)
+                {
+                    e.ResultText = answer;
+                    e.Accept();
+                }
+                break;
+        }
+    }
+
+    private async Task BeginPasskeyLoginAsync(BrowserTab tab, ShdEnvironment environment)
+    {
+        if (_authAttempt is not null)
+        {
+            MessageBox.Show(this, "Вход уже выполняется. Завершите его в браузере или закройте окно входа.", "Вход в SHD", MessageBoxButton.OK, MessageBoxImage.Information);
+            return;
+        }
+        if (environment != ShdEnvironment.Dev)
+        {
+            MessageBox.Show(this, "Вход по passkey в приложении пока подключён только для DEV.", "Вход в SHD", MessageBoxButton.OK, MessageBoxImage.Information);
+            return;
+        }
+
+        try
+        {
+            var attempt = DesktopAuthFlow.Create(environment, tab);
+            _authAttempt = attempt;
+            Process.Start(new ProcessStartInfo(attempt.AuthorizationUri.AbsoluteUri) { UseShellExecute = true });
+            StatusText.Text = "Продолжите вход в системном браузере";
+        }
+        catch (Exception)
+        {
+            _authAttempt = null;
+            MessageBox.Show(this, "Не удалось открыть системный браузер для входа. Попробуйте ещё раз.", "Вход в SHD", MessageBoxButton.OK, MessageBoxImage.Warning);
+        }
+        await Task.CompletedTask;
+    }
+
+    public bool CanHandleAuthCallback(string callbackValue)
+    {
+        if (_authAttempt is null) return false;
+        if (!DesktopAuthFlow.TryParseCallback(callbackValue, out var callback, out _)) return false;
+        return callback is not null && callback.State == _authAttempt.State;
+    }
+
+    public async void HandleAuthCallback(string callbackValue)
+    {
+        if (!DesktopAuthFlow.TryParseCallback(callbackValue, out var callback, out var serverError))
+        {
+            MessageBox.Show(this, "Сервер вернул некорректный ответ входа.", "Вход в SHD", MessageBoxButton.OK, MessageBoxImage.Warning);
+            return;
+        }
+
+        var attempt = _authAttempt;
+        if (attempt is null)
+        {
+            MessageBox.Show(this, "Этот ответ входа уже нельзя использовать. Нажмите кнопку passkey на странице и начните заново.", "Вход в SHD", MessageBoxButton.OK, MessageBoxImage.Information);
+            return;
+        }
+        if (callback is null || callback.State != attempt.State)
+        {
+            MessageBox.Show(this, "Не удалось подтвердить ответ сервера. Начните вход заново.", "Вход в SHD", MessageBoxButton.OK, MessageBoxImage.Warning);
+            return;
+        }
+        if (serverError)
+        {
+            _authAttempt = null;
+            MessageBox.Show(this, "Сервер не завершил вход. Попробуйте ещё раз.", "Вход в SHD", MessageBoxButton.OK, MessageBoxImage.Warning);
+            return;
+        }
+        if (!_tabs.Contains(attempt.TargetTab) || attempt.TargetTab.View.CoreWebView2 is null)
+        {
+            _authAttempt = null;
+            MessageBox.Show(this, "Вкладка, из которой начался вход, уже закрыта. Начните вход заново.", "Вход в SHD", MessageBoxButton.OK, MessageBoxImage.Warning);
+            return;
+        }
+
+        try
+        {
+            _authAttempt = null;
+            var formBody = $"code={DesktopAuthFlow.FormEncode(callback.Code)}&code_verifier={DesktopAuthFlow.FormEncode(attempt.Verifier)}";
+            _authPostData?.Dispose();
+            _authPostData = new MemoryStream(Encoding.UTF8.GetBytes(formBody));
+            _authPostTarget = attempt.TargetTab.View;
+            _authNavigationId = null;
+            var request = _webViewEnvironment!.CreateWebResourceRequest(
+                DesktopAuthFlow.CompleteUri(attempt.Environment).AbsoluteUri,
+                "POST",
+                _authPostData,
+                "Content-Type: application/x-www-form-urlencoded; charset=utf-8\r\nCache-Control: no-store\r\n");
+            attempt.TargetTab.Environment = attempt.Environment;
+            Tabs.SelectedItem = attempt.TargetTab.Item;
+            SetEnvironmentPicker(attempt.Environment);
+            SettingsStore.SaveEnvironment(attempt.Environment);
+            attempt.TargetTab.View.CoreWebView2.NavigateWithWebResourceRequest(request);
+            StatusText.Text = "Завершаем вход…";
+        }
+        catch (Exception)
+        {
+            _authPostData?.Dispose();
+            _authPostData = null;
+            _authPostTarget = null;
+            _authNavigationId = null;
+            MessageBox.Show(this, "Не удалось завершить вход в выбранном контуре. Начните вход заново.", "Вход в SHD", MessageBoxButton.OK, MessageBoxImage.Warning);
+        }
+        await Task.CompletedTask;
+    }
+
+    private void SetEnvironment(ShdEnvironment environment)
+    {
+        _selectedEnvironment = environment;
+        SettingsStore.SaveEnvironment(environment);
+        SetEnvironmentPicker(environment);
+        StatusEnvironment.Text = environment.DisplayName();
+        var tab = ActiveTab;
+        if (tab is null || tab.View.CoreWebView2 is null) return;
+        tab.Environment = environment;
+        tab.View.CoreWebView2.Navigate(environment.BaseUrl());
+    }
+
+    private void SetEnvironmentPicker(ShdEnvironment environment)
+    {
+        _suppressEnvironmentChange = true;
+        EnvironmentPicker.SelectedValue = environment.ToString();
+        _suppressEnvironmentChange = false;
+    }
+
+    private async void NewTab_Click(object sender, RoutedEventArgs e)
+    {
+        if (_webViewEnvironment is null) return;
+        await AddTabAsync(_selectedEnvironment);
+    }
+
+    private void NewWindow_Click(object sender, RoutedEventArgs e)
+    {
+        var window = new MainWindow(_selectedEnvironment);
+        window.Show();
+    }
+
+    private void CloseTab_Click(object sender, RoutedEventArgs e)
+    {
+        if (ActiveTab is { } tab) CloseTab(tab);
+    }
+
+    private void CloseTab(BrowserTab tab)
+    {
+        if (_authAttempt?.TargetTab == tab) _authAttempt = null;
+        if (ReferenceEquals(_authPostTarget, tab.View))
+        {
+            _authPostData?.Dispose();
+            _authPostData = null;
+            _authPostTarget = null;
+            _authNavigationId = null;
+        }
+        tab.View.Dispose();
+        _tabs.Remove(tab);
+        Tabs.Items.Remove(tab.Item);
+        if (_tabs.Count == 0 && !_closing) _ = AddTabAsync(_selectedEnvironment);
+        UpdateWindowChrome();
+    }
+
+    private void Tabs_SelectionChanged(object sender, SelectionChangedEventArgs e)
+    {
+        var tab = ActiveTab;
+        if (tab is null) return;
+        _selectedEnvironment = tab.Environment;
+        SetEnvironmentPicker(tab.Environment);
+        StatusEnvironment.Text = tab.Environment.DisplayName();
+        PageTitle.Text = tab.Title.Text;
+        Title = $"{CleanTitle(tab.View.CoreWebView2?.DocumentTitle ?? "SHD")} — SHD";
+        UpdateNavigationButtons();
+    }
+
+    private void EnvironmentPicker_SelectionChanged(object sender, SelectionChangedEventArgs e)
+    {
+        if (_suppressEnvironmentChange || !Enum.TryParse<ShdEnvironment>(EnvironmentPicker.SelectedValue as string, out var environment)) return;
+        if (environment == _selectedEnvironment && ActiveTab?.Environment == environment) return;
+        SetEnvironment(environment);
+    }
+
+    private void Window_PreviewKeyDown(object sender, KeyEventArgs e)
+    {
+        var modifiers = Keyboard.Modifiers;
+        if (modifiers == ModifierKeys.Control)
+        {
+            switch (e.Key)
+            {
+                case Key.T: NewTab_Click(sender, e); e.Handled = true; break;
+                case Key.N: NewWindow_Click(sender, e); e.Handled = true; break;
+                case Key.W: CloseTab_Click(sender, e); e.Handled = true; break;
+                case Key.R: Reload_Click(sender, e); e.Handled = true; break;
+                case Key.P: Print_Click(sender, e); e.Handled = true; break;
+                case Key.D0: ZoomReset_Click(sender, e); e.Handled = true; break;
+                case Key.Add:
+                case Key.OemPlus: ZoomIn_Click(sender, e); e.Handled = true; break;
+                case Key.Subtract:
+                case Key.OemMinus: ZoomOut_Click(sender, e); e.Handled = true; break;
+            }
+        }
+        else if (modifiers == (ModifierKeys.Control | ModifierKeys.Shift) && e.Key == Key.R)
+        {
+            HardReload_Click(sender, e);
+            e.Handled = true;
+        }
+        else if (e.Key == Key.F12)
+        {
+            DevTools_Click(sender, e);
+            e.Handled = true;
+        }
+        else if (e.Key == Key.F11)
+        {
+            FullScreen_Click(sender, e);
+            e.Handled = true;
+        }
+        else if (modifiers == ModifierKeys.Alt && e.Key == Key.Left)
+        {
+            Back_Click(sender, e);
+            e.Handled = true;
+        }
+        else if (modifiers == ModifierKeys.Alt && e.Key == Key.Right)
+        {
+            Forward_Click(sender, e);
+            e.Handled = true;
+        }
+    }
+
+    private void Back_Click(object sender, RoutedEventArgs e)
+    {
+        if (ActiveTab?.View.CoreWebView2?.CanGoBack == true) ActiveTab.View.CoreWebView2.GoBack();
+    }
+
+    private void Forward_Click(object sender, RoutedEventArgs e)
+    {
+        if (ActiveTab?.View.CoreWebView2?.CanGoForward == true) ActiveTab.View.CoreWebView2.GoForward();
+    }
+
+    private void Reload_Click(object sender, RoutedEventArgs e) => ActiveTab?.View.CoreWebView2?.Reload();
+
+    private async void HardReload_Click(object sender, RoutedEventArgs e)
+    {
+        var core = ActiveTab?.View.CoreWebView2;
+        if (core is null) return;
+        try { await core.CallDevToolsProtocolMethodAsync("Page.reload", "{\"ignoreCache\":true}"); }
+        catch (InvalidOperationException) { core.Reload(); }
+    }
+
+    private void ZoomIn_Click(object sender, RoutedEventArgs e)
+    {
+        if (ActiveTab is { } tab) tab.View.ZoomFactor = Math.Min(tab.View.ZoomFactor + 0.1, 3.0);
+    }
+
+    private void ZoomOut_Click(object sender, RoutedEventArgs e)
+    {
+        if (ActiveTab is { } tab) tab.View.ZoomFactor = Math.Max(tab.View.ZoomFactor - 0.1, 0.4);
+    }
+
+    private void ZoomReset_Click(object sender, RoutedEventArgs e)
+    {
+        if (ActiveTab is { } tab) tab.View.ZoomFactor = 1.0;
+    }
+
+    private void Print_Click(object sender, RoutedEventArgs e) => ActiveTab?.View.CoreWebView2?.ShowPrintUI(CoreWebView2PrintDialogKind.Browser);
+
+    private void DevTools_Click(object sender, RoutedEventArgs e) => ActiveTab?.View.CoreWebView2?.OpenDevToolsWindow();
+
+    private void FullScreen_Click(object sender, RoutedEventArgs e)
+    {
+        if (!_isFullScreen)
+        {
+            _previousBounds = RestoreBounds;
+            _previousWindowState = WindowState;
+            _previousWindowStyle = WindowStyle;
+            WindowState = WindowState.Normal;
+            WindowStyle = WindowStyle.None;
+            WindowState = WindowState.Maximized;
+            _isFullScreen = true;
+            return;
+        }
+
+        WindowStyle = _previousWindowStyle;
+        WindowState = WindowState.Normal;
+        Left = _previousBounds.Left;
+        Top = _previousBounds.Top;
+        Width = _previousBounds.Width;
+        Height = _previousBounds.Height;
+        WindowState = _previousWindowState;
+        _isFullScreen = false;
+    }
+
+    private void Downloads_Click(object sender, RoutedEventArgs e)
+    {
+        var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Downloads");
+        Directory.CreateDirectory(path);
+        OpenExternalUri(new Uri(path));
+    }
+
+    private void SelectProduction_Click(object sender, RoutedEventArgs e) => SetEnvironment(ShdEnvironment.Production);
+
+    private void SelectDev_Click(object sender, RoutedEventArgs e) => SetEnvironment(ShdEnvironment.Dev);
+
+    private void Exit_Click(object sender, RoutedEventArgs e) => Application.Current.Shutdown();
+
+    private void Undo_Click(object sender, RoutedEventArgs e) => ExecuteEditCommand("undo");
+    private void Redo_Click(object sender, RoutedEventArgs e) => ExecuteEditCommand("redo");
+    private void Cut_Click(object sender, RoutedEventArgs e) => ExecuteEditCommand("cut");
+    private void Copy_Click(object sender, RoutedEventArgs e) => ExecuteEditCommand("copy");
+    private void Paste_Click(object sender, RoutedEventArgs e) => ExecuteEditCommand("paste");
+    private void SelectAll_Click(object sender, RoutedEventArgs e) => ExecuteEditCommand("selectAll");
+
+    private void ExecuteEditCommand(string command)
+    {
+        var escaped = command.Replace("'", "\\'", StringComparison.Ordinal);
+        _ = ActiveTab?.View.CoreWebView2?.ExecuteScriptAsync($"document.execCommand('{escaped}')");
+    }
+
+    private void UpdateWindowChrome()
+    {
+        if (ActiveTab is { } tab)
+        {
+            PageTitle.Text = tab.Title.Text;
+            StatusEnvironment.Text = tab.Environment.DisplayName();
+        }
+        UpdateNavigationButtons();
+    }
+
+    private void UpdateNavigationButtons()
+    {
+        BackButton.IsEnabled = ActiveTab?.View.CoreWebView2?.CanGoBack == true;
+        ForwardButton.IsEnabled = ActiveTab?.View.CoreWebView2?.CanGoForward == true;
+    }
+
+    private static string CleanTitle(string? raw)
+    {
+        var title = raw ?? string.Empty;
+        foreach (var suffix in new[] { " — SHD Project", " - SHD Project", " | SHD" })
+        {
+            var index = title.IndexOf(suffix, StringComparison.Ordinal);
+            if (index >= 0) title = title[..index];
+        }
+        return string.IsNullOrWhiteSpace(title) ? "SHD" : title.Trim();
+    }
+
+    private static string GetUniquePath(string path)
+    {
+        if (!File.Exists(path)) return path;
+        var directory = Path.GetDirectoryName(path)!;
+        var name = Path.GetFileNameWithoutExtension(path);
+        var extension = Path.GetExtension(path);
+        for (var counter = 1; ; counter++)
+        {
+            var candidate = Path.Combine(directory, $"{name} ({counter}){extension}");
+            if (!File.Exists(candidate)) return candidate;
+        }
+    }
+
+    private string? ShowPrompt(string message, string defaultValue)
+    {
+        var dialog = new Window
+        {
+            Owner = this,
+            Title = "SHD",
+            Width = 430,
+            SizeToContent = SizeToContent.Height,
+            WindowStartupLocation = WindowStartupLocation.CenterOwner,
+            ResizeMode = ResizeMode.NoResize,
+            Background = new SolidColorBrush(Color.FromRgb(34, 34, 34)),
+            Foreground = Brushes.White,
+            ShowInTaskbar = false
+        };
+        var input = new TextBox { Text = defaultValue, MinWidth = 380, Margin = new Thickness(0, 9, 0, 14), Padding = new Thickness(6) };
+        var accept = new Button { Content = "OK", IsDefault = true, MinWidth = 80 };
+        var cancel = new Button { Content = "Отмена", IsCancel = true, MinWidth = 80 };
+        var buttons = new StackPanel { Orientation = Orientation.Horizontal, HorizontalAlignment = HorizontalAlignment.Right };
+        buttons.Children.Add(accept);
+        buttons.Children.Add(cancel);
+        var panel = new StackPanel { Margin = new Thickness(18) };
+        panel.Children.Add(new TextBlock { Text = message, TextWrapping = TextWrapping.Wrap, MaxWidth = 380 });
+        panel.Children.Add(input);
+        panel.Children.Add(buttons);
+        dialog.Content = panel;
+        string? result = null;
+        accept.Click += (_, _) => { result = input.Text; dialog.DialogResult = true; };
+        dialog.Loaded += (_, _) => { input.Focus(); input.SelectAll(); };
+        dialog.ShowDialog();
+        return result;
+    }
+
+    private void OpenExternalUri(Uri uri)
+    {
+        try
+        {
+            if (uri.IsFile)
+            {
+                Process.Start(new ProcessStartInfo(uri.LocalPath) { UseShellExecute = true });
+                return;
+            }
+            if (uri.Scheme is "http" or "https" or "mailto")
+                Process.Start(new ProcessStartInfo(uri.AbsoluteUri) { UseShellExecute = true });
+        }
+        catch (Exception)
+        {
+            StatusText.Text = "Не удалось открыть ссылку";
+        }
+    }
+
+    private void Window_Closing(object? sender, System.ComponentModel.CancelEventArgs e)
+    {
+        _closing = true;
+        _authAttempt = null;
+        _authPostData?.Dispose();
+        _authPostData = null;
+        foreach (var tab in _tabs.ToArray()) tab.View.Dispose();
+        _tabs.Clear();
+    }
+}
diff --git a/Windows/SHD.Windows/SHD.Windows.csproj b/Windows/SHD.Windows/SHD.Windows.csproj
new file mode 100644
index 0000000..e2dff66
--- /dev/null
+++ b/Windows/SHD.Windows/SHD.Windows.csproj
@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net10.0-windows</TargetFramework>
+    <UseWPF>true</UseWPF>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <ApplicationManifest>app.manifest</ApplicationManifest>
+    <AssemblyName>SHD.Windows</AssemblyName>
+    <RootNamespace>SHD.Windows</RootNamespace>
+    <Version>1.0.0</Version>
+    <Authors>SHD</Authors>
+    <Description>SHD desktop app for Windows</Description>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Web.WebView2" Version="1.0.4258.31" />
+  </ItemGroup>
+</Project>
diff --git a/Windows/SHD.Windows/SettingsStore.cs b/Windows/SHD.Windows/SettingsStore.cs
new file mode 100644
index 0000000..701f083
--- /dev/null
+++ b/Windows/SHD.Windows/SettingsStore.cs
@@ -0,0 +1,39 @@
+using System.Text.Json;
+
+namespace SHD.Windows;
+
+internal static class SettingsStore
+{
+    private static readonly string SettingsPath = Path.Combine(
+        Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
+        "SHDDesktop",
+        "settings.json");
+
+    public static ShdEnvironment LoadEnvironment()
+    {
+        try
+        {
+            var settings = JsonSerializer.Deserialize<AppSettings>(File.ReadAllText(SettingsPath));
+            if (Enum.TryParse<ShdEnvironment>(settings?.Environment, ignoreCase: true, out var environment))
+                return environment;
+        }
+        catch (IOException) { }
+        catch (JsonException) { }
+        catch (UnauthorizedAccessException) { }
+
+        return ShdEnvironment.Production;
+    }
+
+    public static void SaveEnvironment(ShdEnvironment environment)
+    {
+        try
+        {
+            Directory.CreateDirectory(Path.GetDirectoryName(SettingsPath)!);
+            File.WriteAllText(SettingsPath, JsonSerializer.Serialize(new AppSettings(environment.ToString())));
+        }
+        catch (IOException) { }
+        catch (UnauthorizedAccessException) { }
+    }
+
+    private sealed record AppSettings(string Environment);
+}
diff --git a/Windows/SHD.Windows/ShdEnvironment.cs b/Windows/SHD.Windows/ShdEnvironment.cs
new file mode 100644
index 0000000..d0dbb49
--- /dev/null
+++ b/Windows/SHD.Windows/ShdEnvironment.cs
@@ -0,0 +1,32 @@
+namespace SHD.Windows;
+
+internal enum ShdEnvironment
+{
+    Production,
+    Dev
+}
+
+internal static class ShdEnvironmentExtensions
+{
+    public static string BaseUrl(this ShdEnvironment environment) => environment switch
+    {
+        ShdEnvironment.Dev => "https://dev-shd.xyz.su",
+        _ => "https://shd.xyz.su"
+    };
+
+    public static string DisplayName(this ShdEnvironment environment) => environment switch
+    {
+        ShdEnvironment.Dev => "SHD Dev",
+        _ => "SHD Production"
+    };
+
+    public static bool IsDevelopmentHost(string host) =>
+        host.Equals("dev-shd.xyz.su", StringComparison.OrdinalIgnoreCase);
+
+    public static bool IsProductionHost(string host) =>
+        host.Equals("shd.xyz.su", StringComparison.OrdinalIgnoreCase);
+
+    public static bool IsInternalHost(string host) =>
+        host.Equals("xyz.su", StringComparison.OrdinalIgnoreCase) ||
+        host.EndsWith(".xyz.su", StringComparison.OrdinalIgnoreCase);
+}
diff --git a/Windows/SHD.Windows/app.manifest b/Windows/SHD.Windows/app.manifest
new file mode 100644
index 0000000..d6fbd8a
--- /dev/null
+++ b/Windows/SHD.Windows/app.manifest
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+  <assemblyIdentity version="1.0.0.0" name="SHD.Windows" />
+  <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+    <security>
+      <requestedPrivileges>
+        <requestedExecutionLevel level="asInvoker" uiAccess="false" />
+      </requestedPrivileges>
+    </security>
+  </trustInfo>
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
+    </application>
+  </compatibility>
+</assembly>
diff --git a/Windows/Scripts/build.ps1 b/Windows/Scripts/build.ps1
new file mode 100644
index 0000000..e5f1422
--- /dev/null
+++ b/Windows/Scripts/build.ps1
@@ -0,0 +1,24 @@
+$ErrorActionPreference = 'Stop'
+
+$windowsRoot = Split-Path -Parent $PSScriptRoot
+$project = Join-Path $windowsRoot 'SHD.Windows\SHD.Windows.csproj'
+$publishDir = Join-Path $windowsRoot 'publish'
+$distDir = Join-Path $windowsRoot 'dist'
+$bundleDir = Join-Path $distDir 'SHD-Windows-x64'
+$zipPath = Join-Path $distDir 'SHD-Windows-x64.zip'
+
+if (Test-Path $publishDir) { Remove-Item $publishDir -Recurse -Force }
+if (Test-Path $bundleDir) { Remove-Item $bundleDir -Recurse -Force }
+New-Item -ItemType Directory -Path $publishDir -Force | Out-Null
+New-Item -ItemType Directory -Path $bundleDir -Force | Out-Null
+
+dotnet publish $project -c Release -r win-x64 --self-contained true -p:PublishSingleFile=false -o $publishDir
+if ($LASTEXITCODE -ne 0) { throw 'dotnet publish failed.' }
+
+Copy-Item (Join-Path $publishDir '*') $bundleDir -Recurse -Force
+Copy-Item (Join-Path $PSScriptRoot 'install.ps1') $bundleDir -Force
+Copy-Item (Join-Path $PSScriptRoot 'uninstall.ps1') $bundleDir -Force
+Copy-Item (Join-Path $windowsRoot 'README.md') $bundleDir -Force
+if (Test-Path $zipPath) { Remove-Item $zipPath -Force }
+Compress-Archive -Path (Join-Path $bundleDir '*') -DestinationPath $zipPath -CompressionLevel Optimal
+Write-Host "Created $zipPath"
diff --git a/Windows/Scripts/install.ps1 b/Windows/Scripts/install.ps1
new file mode 100644
index 0000000..5e8eb10
--- /dev/null
+++ b/Windows/Scripts/install.ps1
@@ -0,0 +1,43 @@
+param(
+    [switch]$NoLaunch
+)
+
+$ErrorActionPreference = 'Stop'
+$bundleDir = Split-Path -Parent $MyInvocation.MyCommand.Path
+$sourceExe = Join-Path $bundleDir 'SHD.Windows.exe'
+if (-not (Test-Path $sourceExe)) {
+    throw 'SHD.Windows.exe is missing. Extract the complete SHD-Windows-x64.zip before installing.'
+}
+
+$installDir = Join-Path $env:LOCALAPPDATA 'Programs\SHD'
+New-Item -ItemType Directory -Path $installDir -Force | Out-Null
+$bundleFullPath = [System.IO.Path]::GetFullPath($bundleDir).TrimEnd('\')
+$installFullPath = [System.IO.Path]::GetFullPath($installDir).TrimEnd('\')
+if (-not $bundleFullPath.Equals($installFullPath, [System.StringComparison]::OrdinalIgnoreCase)) {
+    Get-ChildItem -LiteralPath $bundleDir -Force | ForEach-Object {
+        Copy-Item -LiteralPath $_.FullName -Destination $installDir -Recurse -Force
+    }
+}
+
+$installedExe = Join-Path $installDir 'SHD.Windows.exe'
+$protocolKey = 'HKCU:\Software\Classes\shd-auth'
+New-Item -Path $protocolKey -Force | Out-Null
+Set-Item -Path $protocolKey -Value 'URL:SHD Desktop authentication'
+New-ItemProperty -Path $protocolKey -Name 'URL Protocol' -Value '' -PropertyType String -Force | Out-Null
+$commandKey = Join-Path $protocolKey 'shell\open\command'
+New-Item -Path $commandKey -Force | Out-Null
+Set-Item -Path $commandKey -Value ('"{0}" "%1"' -f $installedExe)
+
+$startMenuDir = Join-Path $env:APPDATA 'Microsoft\Windows\Start Menu\Programs\SHD'
+New-Item -ItemType Directory -Path $startMenuDir -Force | Out-Null
+$shortcutPath = Join-Path $startMenuDir 'SHD.lnk'
+$shell = New-Object -ComObject WScript.Shell
+$shortcut = $shell.CreateShortcut($shortcutPath)
+$shortcut.TargetPath = $installedExe
+$shortcut.WorkingDirectory = $installDir
+$shortcut.IconLocation = "$installedExe,0"
+$shortcut.Save()
+
+Write-Host "SHD installed to $installDir"
+Write-Host 'The shd-auth:// callback is registered for passkey sign-in.'
+if (-not $NoLaunch) { Start-Process -FilePath $installedExe }
diff --git a/Windows/Scripts/uninstall.ps1 b/Windows/Scripts/uninstall.ps1
new file mode 100644
index 0000000..8f5b337
--- /dev/null
+++ b/Windows/Scripts/uninstall.ps1
@@ -0,0 +1,16 @@
+$ErrorActionPreference = 'Stop'
+$installDir = Join-Path $env:LOCALAPPDATA 'Programs\SHD'
+$startMenuDir = Join-Path $env:APPDATA 'Microsoft\Windows\Start Menu\Programs\SHD'
+$protocolKey = 'HKCU:\Software\Classes\shd-auth'
+
+if (Test-Path $protocolKey) {
+    $commandKey = Join-Path $protocolKey 'shell\open\command'
+    $registeredCommand = if (Test-Path $commandKey) { (Get-Item -Path $commandKey).GetValue('') } else { '' }
+    if ($registeredCommand -like '*\Programs\SHD\SHD.Windows.exe*') {
+        Remove-Item -Path $protocolKey -Recurse -Force
+    }
+}
+if (Test-Path $startMenuDir) { Remove-Item -Path $startMenuDir -Recurse -Force }
+if (Test-Path $installDir) { Remove-Item -Path $installDir -Recurse -Force -ErrorAction SilentlyContinue }
+
+Write-Host 'SHD has been uninstalled. Your WebView profile and site data remain under %LOCALAPPDATA%\SHDDesktop.'