feat(tools): add first-run external tool installer wizard and catalog

첫 실행 시 외부 도구 설치 마법사를 띄우고 7종(FFmpeg·LibreOffice·Pandoc·ImageMagick·H2Orestart·agy·Codex)을 기본 전체 선택 상태로 순차 설치한다.
- Core: ExternalToolCatalog(정적 카탈로그, winget ID 실검증), ExternalToolInstaller(winget 무인 실행·재감지 판정, IExternalCommandRunner 시드로 테스트 가능)
- Core: ExternalToolDetector에 winget FFmpeg 스캔 + Pandoc/ImageMagick 감지 추가
- App: ToolSetupWindow + ToolSetupViewModel, 첫 실행 플래그(setup.tools.done), 설정 창 '외부 도구 설치/검증' 재진입 버튼
- Tests: ExternalToolInstallerTests 5건
- 기존 미커밋 작업(광고 Ads 지원: AdBannerControl/AdLargeCardControl/AdService, AI 백엔드 agy·switchboard·codex 채팅 클라이언트, 관련 테스트) 포함

src/Everything2Everything.App/App.xaml.cs

@@ -76,15 +76,27 @@ public partial class App : Application
 
     private void ShowMainWindow()
     {
-        var window = new MainWindow(Engine, Settings);
+        RunFirstRunSetupIfNeeded();
+        var adService = _services.GetService<Everything2Everything.Core.Ads.IAdService>();
+        var window = new MainWindow(Engine, Settings, null, adService);
         MainWindow = window;
         window.Show();
         window.Activate();
     }
 
+    /// <summary>첫 실행이면 외부 도구 설치 마법사를 한 번 띄우고 완료 플래그를 남긴다(설정 창에서 재진입 가능).</summary>
+    private void RunFirstRunSetupIfNeeded()
+    {
+        if (Settings.Get("setup.tools.done") == "1") return;
+        var wizard = new ToolSetupWindow();
+        wizard.ShowDialog();
+        Settings.Set("setup.tools.done", "1");
+    }
+
     private void ShowConvertDialog(IReadOnlyList<string> files)
     {
-        var window = new Views.MainWindow(Engine, Settings, files);
+        var adService = _services.GetService<Everything2Everything.Core.Ads.IAdService>();
+        var window = new Views.MainWindow(Engine, Settings, files, adService);
         MainWindow = window;
         window.Show();
         window.Activate();

src/Everything2Everything.App/ViewModels/AdViewModel.cs

@@ -0,0 +1,106 @@
+using System;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+using System.Windows.Input;
+using Everything2Everything.Core.Ads;
+
+namespace Everything2Everything.App.ViewModels;
+
+public class AdViewModel : INotifyPropertyChanged
+{
+    private readonly IAdService _adService;
+    private AdItem? _currentBannerAd;
+    private AdItem? _currentLargeAd;
+    private bool _isBannerVisible = true;
+    private bool _isLargeCardVisible = true;
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+
+    public AdItem? CurrentBannerAd
+    {
+        get => _currentBannerAd;
+        set { _currentBannerAd = value; OnPropertyChanged(); }
+    }
+
+    public AdItem? CurrentLargeAd
+    {
+        get => _currentLargeAd;
+        set { _currentLargeAd = value; OnPropertyChanged(); }
+    }
+
+    public bool IsBannerVisible
+    {
+        get => _isBannerVisible;
+        set { _isBannerVisible = value; OnPropertyChanged(); }
+    }
+
+    public bool IsLargeCardVisible
+    {
+        get => _isLargeCardVisible;
+        set { _isLargeCardVisible = value; OnPropertyChanged(); }
+    }
+
+    public ICommand ClickBannerAdCommand { get; }
+    public ICommand ClickLargeAdCommand { get; }
+    public ICommand DismissBannerCommand { get; }
+    public ICommand DismissLargeCardCommand { get; }
+
+    public AdViewModel(IAdService adService)
+    {
+        _adService = adService ?? throw new ArgumentNullException(nameof(adService));
+
+        CurrentBannerAd = _adService.GetNextBannerAd();
+        CurrentLargeAd = _adService.GetNextLargeCardAd();
+
+        ClickBannerAdCommand = new AdCommand(_ =>
+        {
+            if (CurrentBannerAd != null)
+                _adService.OpenAdUrl(CurrentBannerAd);
+        });
+
+        ClickLargeAdCommand = new AdCommand(_ =>
+        {
+            if (CurrentLargeAd != null)
+                _adService.OpenAdUrl(CurrentLargeAd);
+        });
+
+        DismissBannerCommand = new AdCommand(_ => IsBannerVisible = false);
+        DismissLargeCardCommand = new AdCommand(_ => IsLargeCardVisible = false);
+    }
+
+    public void RotateBannerAd()
+    {
+        CurrentBannerAd = _adService.GetNextBannerAd();
+    }
+
+    public void RotateLargeCardAd()
+    {
+        CurrentLargeAd = _adService.GetNextLargeCardAd();
+    }
+
+    protected void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+    {
+        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+    }
+
+    private sealed class AdCommand : ICommand
+    {
+        private readonly Action<object?> _execute;
+        private readonly Func<object?, bool>? _canExecute;
+
+        public AdCommand(Action<object?> execute, Func<object?, bool>? canExecute = null)
+        {
+            _execute = execute;
+            _canExecute = canExecute;
+        }
+
+        public bool CanExecute(object? parameter) => _canExecute?.Invoke(parameter) ?? true;
+        public void Execute(object? parameter) => _execute(parameter);
+
+        public event EventHandler? CanExecuteChanged
+        {
+            add { }
+            remove { }
+        }
+    }
+}

src/Everything2Everything.App/ViewModels/ToolSetupViewModel.cs

@@ -0,0 +1,184 @@
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+using System.Windows;
+using System.Windows.Media;
+using Everything2Everything.Core.Converters;
+
+namespace Everything2Everything.App.ViewModels;
+
+public enum ToolInstallState
+{
+    NotInstalled,
+    Installed,
+    Busy,
+    Failed,
+}
+
+/// <summary>설치 마법사 목록의 한 행. 카탈로그 정의 + 선택/상태/진행 표현.</summary>
+public sealed class ToolInstallItem : INotifyPropertyChanged
+{
+    public ExternalToolDefinition Definition { get; }
+    public ToolInstallItem(ExternalToolDefinition definition)
+    {
+        Definition = definition;
+        RefreshStatus();
+    }
+
+    public string Name => Definition.DisplayName;
+    public string Description => Definition.Description;
+
+    private bool _isSelected = true;
+    public bool IsSelected
+    {
+        get => _isSelected;
+        set { _isSelected = value; OnPropertyChanged(); }
+    }
+
+    private ToolInstallState _state;
+    public ToolInstallState State
+    {
+        get => _state;
+        private set
+        {
+            _state = value;
+            OnPropertyChanged();
+            OnPropertyChanged(nameof(IsBusy));
+            OnPropertyChanged(nameof(StatusText));
+            OnPropertyChanged(nameof(StatusBrush));
+        }
+    }
+
+    public string StatusText => State switch
+    {
+        ToolInstallState.Installed => "설치됨",
+        ToolInstallState.Busy => "설치 중…",
+        ToolInstallState.Failed => "실패",
+        _ => "미설치",
+    };
+
+    public bool IsBusy => State == ToolInstallState.Busy;
+
+    public Brush StatusBrush => State switch
+    {
+        ToolInstallState.Installed => BrushOf("FsStatusSuccess"),
+        ToolInstallState.Busy => BrushOf("FsStatusInfo"),
+        ToolInstallState.Failed => BrushOf("FsStatusDanger"),
+        _ => BrushOf("FsStatusWarn"),
+    };
+
+    private string? _detail;
+    public string? Detail
+    {
+        get => _detail;
+        private set { _detail = value; OnPropertyChanged(); }
+    }
+
+    public void RefreshStatus()
+        => State = Definition.IsInstalled() ? ToolInstallState.Installed : ToolInstallState.NotInstalled;
+
+    public void ApplyResult(bool success, string? detail)
+    {
+        Detail = detail;
+        State = success ? ToolInstallState.Installed : ToolInstallState.Failed;
+    }
+
+    public void BeginInstall() => State = ToolInstallState.Busy;
+
+    private static Brush BrushOf(string key)
+        => (Application.Current?.TryFindResource(key) as Brush)
+           ?? _fallbacks.GetValueOrDefault(key, _warn);
+
+    private static readonly Brush _info = Fixed(0x1565C0);
+    private static readonly Brush _success = Fixed(0x2E7D32);
+    private static readonly Brush _warn = Fixed(0xC77700);
+    private static readonly Brush _danger = Fixed(0xC62828);
+    private static readonly Dictionary<string, Brush> _fallbacks = new()
+    {
+        ["FsStatusInfo"] = _info,
+        ["FsStatusSuccess"] = _success,
+        ["FsStatusWarn"] = _warn,
+        ["FsStatusDanger"] = _danger,
+    };
+
+    private static Brush Fixed(uint rgb)
+    {
+        var c = (int)rgb;
+        return new SolidColorBrush(Color.FromRgb((byte)(c >> 16), (byte)(c >> 8), (byte)c));
+    }
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+    private void OnPropertyChanged([CallerMemberName] string? name = null)
+        => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
+}
+
+/// <summary>설치 마법사의 루트 뷰모델: 목록 + 전체 선택 + 선택분 순차 설치.</summary>
+public sealed class ToolSetupViewModel : INotifyPropertyChanged
+{
+    private readonly ExternalToolInstaller _installer;
+    private bool _isInstalling;
+    private bool _selectAll = true;
+
+    public ObservableCollection<ToolInstallItem> Tools { get; } = new();
+
+    public ToolSetupViewModel(IEnumerable<ExternalToolDefinition>? definitions = null, ExternalToolInstaller? installer = null)
+    {
+        _installer = installer ?? new ExternalToolInstaller();
+        foreach (var def in definitions ?? ExternalToolCatalog.All)
+            Tools.Add(new ToolInstallItem(def));
+    }
+
+    public bool IsInstalling
+    {
+        get => _isInstalling;
+        private set { _isInstalling = value; OnPropertyChanged(); }
+    }
+
+    public bool SelectAll
+    {
+        get => _selectAll;
+        set
+        {
+            _selectAll = value;
+            foreach (var t in Tools) t.IsSelected = value;
+            OnPropertyChanged();
+        }
+    }
+
+    public void RefreshStatus()
+    {
+        foreach (var t in Tools) t.RefreshStatus();
+    }
+
+    public async Task InstallSelectedAsync(CancellationToken ct)
+    {
+        if (IsInstalling) return;
+        IsInstalling = true;
+        try
+        {
+            foreach (var item in Tools.Where(t => t.IsSelected).ToList())
+                await InstallOneAsync(item, ct).ConfigureAwait(true);
+        }
+        finally
+        {
+            IsInstalling = false;
+        }
+    }
+
+    public async Task InstallOneAsync(ToolInstallItem item, CancellationToken ct)
+    {
+        item.BeginInstall();
+        var result = await _installer.InstallAsync(item.Definition, ct).ConfigureAwait(true);
+        var detail = string.IsNullOrWhiteSpace(result.Output)
+            ? result.Message
+            : Tail(result.Output, 600);
+        item.ApplyResult(result.Success, detail);
+    }
+
+    private static string Tail(string s, int max)
+        => s.Length <= max ? s : "…" + s[^max..];
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+    private void OnPropertyChanged([CallerMemberName] string? name = null)
+        => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
+}

src/Everything2Everything.App/Views/AdBannerControl.xaml

@@ -0,0 +1,99 @@
+<UserControl x:Class="Everything2Everything.App.Views.AdBannerControl"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:ui="http://schemas.lepo.co/wpfui/2022/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             d:DesignHeight="56" d:DesignWidth="800">
+    <UserControl.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="FormatShiftTheme.xaml"/>
+            </ResourceDictionary.MergedDictionaries>
+            <BooleanToVisibilityConverter x:Key="BoolToVis"/>
+        </ResourceDictionary>
+    </UserControl.Resources>
+
+    <Border Visibility="{Binding IsBannerVisible, Converter={StaticResource BoolToVis}}"
+            Style="{StaticResource FsDoubleBezelShellStyle}"
+            Margin="0,4,0,0">
+        <Border Style="{StaticResource FsDoubleBezelCoreStyle}" Padding="12,8">
+            <Grid VerticalAlignment="Center">
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="Auto"/>
+                    <ColumnDefinition Width="*"/>
+                    <ColumnDefinition Width="Auto"/>
+                    <ColumnDefinition Width="Auto"/>
+                </Grid.ColumnDefinitions>
+
+                <!-- 1. [AD] / [스폰서] 배지 -->
+                <Border Grid.Column="0"
+                        Margin="0,0,10,0"
+                        Padding="6,2"
+                        CornerRadius="4"
+                        Background="#1A00E5FF"
+                        BorderBrush="{StaticResource FsAccentCyan}"
+                        BorderThickness="1"
+                        VerticalAlignment="Center">
+                    <TextBlock Text="{Binding CurrentBannerAd.BadgeText, FallbackValue=AD}"
+                               FontSize="10"
+                               FontWeight="Bold"
+                               Foreground="{StaticResource FsAccentCyan}"
+                               VerticalAlignment="Center"
+                               TextTrimming="CharacterEllipsis"/>
+                </Border>
+
+                <!-- 2. 광고 타이틀 및 설명 -->
+                <StackPanel Grid.Column="1" VerticalAlignment="Center" Margin="0,0,12,0">
+                    <TextBlock Text="{Binding CurrentBannerAd.Title, FallbackValue=스폰서십 안내}"
+                               Style="{StaticResource FsLabelStyle}"
+                               Foreground="{StaticResource FsTextPrimary}"
+                               FontWeight="SemiBold"
+                               TextTrimming="CharacterEllipsis"
+                               VerticalAlignment="Center"/>
+                    <TextBlock Text="{Binding CurrentBannerAd.Description, FallbackValue=Everything2Everything을 후원하고 최신 기능을 가장 먼저 만나보세요.}"
+                               Style="{StaticResource FsCaptionStyle}"
+                               Foreground="{StaticResource FsTextSecondary}"
+                               Margin="0,2,0,0"
+                               TextTrimming="CharacterEllipsis"
+                               VerticalAlignment="Center"/>
+                </StackPanel>
+
+                <!-- 3. CTA 액션 버튼 -->
+                <Button Grid.Column="2"
+                        Margin="0,0,8,0"
+                        Padding="12,4"
+                        Height="28"
+                        VerticalAlignment="Center"
+                        Style="{StaticResource FsSecondaryButtonStyle}"
+                        Command="{Binding ClickBannerAdCommand}"
+                        ToolTip="광고 및 안내 링크 열기">
+                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
+                        <TextBlock Text="{Binding CurrentBannerAd.CtaText, FallbackValue='자세히 보기'}"
+                                   FontSize="11"
+                                   VerticalAlignment="Center"
+                                   TextTrimming="CharacterEllipsis"/>
+                        <ui:SymbolIcon Symbol="Open24"
+                                       FontSize="11"
+                                       Margin="4,0,0,0"
+                                       VerticalAlignment="Center"/>
+                    </StackPanel>
+                </Button>
+
+                <!-- 4. 광고 닫기 버튼 -->
+                <Button Grid.Column="3"
+                        Width="24" Height="24"
+                        VerticalAlignment="Center"
+                        Style="{StaticResource FsIconButtonStyle}"
+                        Command="{Binding DismissBannerCommand}"
+                        ToolTip="광고 닫기">
+                    <ui:SymbolIcon Symbol="Dismiss24"
+                                   FontSize="11"
+                                   Foreground="{StaticResource FsTextTertiary}"
+                                   VerticalAlignment="Center"/>
+                </Button>
+            </Grid>
+        </Border>
+    </Border>
+</UserControl>

src/Everything2Everything.App/Views/AdBannerControl.xaml.cs

@@ -0,0 +1,11 @@
+using System.Windows.Controls;
+
+namespace Everything2Everything.App.Views;
+
+public partial class AdBannerControl : UserControl
+{
+    public AdBannerControl()
+    {
+        InitializeComponent();
+    }
+}

src/Everything2Everything.App/Views/AdLargeCardControl.xaml

@@ -0,0 +1,117 @@
+<UserControl x:Class="Everything2Everything.App.Views.AdLargeCardControl"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:ui="http://schemas.lepo.co/wpfui/2022/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             d:DesignHeight="220" d:DesignWidth="320">
+    <UserControl.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="FormatShiftTheme.xaml"/>
+            </ResourceDictionary.MergedDictionaries>
+            <BooleanToVisibilityConverter x:Key="BoolToVis"/>
+        </ResourceDictionary>
+    </UserControl.Resources>
+
+    <Border Visibility="{Binding IsLargeCardVisible, Converter={StaticResource BoolToVis}}"
+            Style="{StaticResource FsDoubleBezelShellStyle}"
+            Margin="0,16,0,0">
+        <Border Style="{StaticResource FsDoubleBezelCoreStyle}" Padding="16">
+            <StackPanel>
+                <!-- 1. 헤더: 스폰서 배지 + 닫기 버튼 -->
+                <Grid Margin="0,0,0,12">
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="*"/>
+                        <ColumnDefinition Width="Auto"/>
+                    </Grid.ColumnDefinitions>
+                    <StackPanel Grid.Column="0" Orientation="Horizontal" VerticalAlignment="Center">
+                        <Border Padding="6,2"
+                                CornerRadius="4"
+                                Background="#1A3B82F6"
+                                BorderBrush="{StaticResource FsAccentBlue}"
+                                BorderThickness="1"
+                                VerticalAlignment="Center">
+                            <TextBlock Text="{Binding CurrentLargeAd.BadgeText, FallbackValue='스폰서 추천'}"
+                                       FontSize="10"
+                                       FontWeight="Bold"
+                                       Foreground="{StaticResource FsAccentBlue}"
+                                       VerticalAlignment="Center"
+                                       TextTrimming="CharacterEllipsis"/>
+                        </Border>
+                    </StackPanel>
+
+                    <Button Grid.Column="1"
+                            Width="22" Height="22"
+                            VerticalAlignment="Center"
+                            Style="{StaticResource FsIconButtonStyle}"
+                            Command="{Binding DismissLargeCardCommand}"
+                            ToolTip="광고 닫기">
+                        <ui:SymbolIcon Symbol="Dismiss24"
+                                       FontSize="10"
+                                       Foreground="{StaticResource FsTextTertiary}"
+                                       VerticalAlignment="Center"/>
+                    </Button>
+                </Grid>
+
+                <!-- 2. 본문: 아이콘/이미지 + 타이틀 + 설명 -->
+                <Grid Margin="0,0,0,12">
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="Auto"/>
+                        <ColumnDefinition Width="*"/>
+                    </Grid.ColumnDefinitions>
+
+                    <Border Grid.Column="0"
+                            Width="36" Height="36"
+                            CornerRadius="8"
+                            Background="{StaticResource FsBgInput}"
+                            BorderBrush="{StaticResource FsBorderSubtle}"
+                            BorderThickness="1"
+                            Margin="0,0,12,0"
+                            VerticalAlignment="Center">
+                        <Image Width="20" Height="20"
+                               VerticalAlignment="Center"
+                               HorizontalAlignment="Center"
+                               RenderOptions.BitmapScalingMode="HighQuality"
+                               Source="pack://application:,,,/Everything2Everything;component/Assets/logo-mark.png"/>
+                    </Border>
+
+                    <StackPanel Grid.Column="1" VerticalAlignment="Center">
+                        <TextBlock Text="{Binding CurrentLargeAd.Title, FallbackValue='비즈니스 미디어 솔루션'}"
+                                   Style="{StaticResource FsLabelStyle}"
+                                   Foreground="{StaticResource FsTextPrimary}"
+                                   FontWeight="SemiBold"
+                                   FontSize="13"
+                                   TextTrimming="CharacterEllipsis"
+                                   VerticalAlignment="Center"/>
+                        <TextBlock Text="{Binding CurrentLargeAd.Description, FallbackValue='고성능 무손실 일괄 변환을 업무 환경에 적용하세요.'}"
+                                   Style="{StaticResource FsCaptionStyle}"
+                                   Foreground="{StaticResource FsTextSecondary}"
+                                   Margin="0,3,0,0"
+                                   TextWrapping="Wrap"
+                                   VerticalAlignment="Center"/>
+                    </StackPanel>
+                </Grid>
+
+                <!-- 3. 하단 전면 CTA 버튼 -->
+                <Button Style="{StaticResource FsIslandPrimaryButtonStyle}"
+                        Height="34"
+                        Command="{Binding ClickLargeAdCommand}"
+                        ToolTip="자세히 보기">
+                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
+                        <TextBlock Text="{Binding CurrentLargeAd.CtaText, FallbackValue='솔루션 살펴보기'}"
+                                   FontSize="12"
+                                   FontWeight="SemiBold"
+                                   VerticalAlignment="Center"
+                                   TextTrimming="CharacterEllipsis"/>
+                        <ui:SymbolIcon Symbol="ArrowRight24"
+                                       FontSize="12"
+                                       Margin="6,0,0,0"
+                                       VerticalAlignment="Center"/>
+                    </StackPanel>
+                </Button>
+            </StackPanel>
+        </Border>
+    </Border>
+</UserControl>

src/Everything2Everything.App/Views/AdLargeCardControl.xaml.cs

@@ -0,0 +1,11 @@
+using System.Windows.Controls;
+
+namespace Everything2Everything.App.Views;
+
+public partial class AdLargeCardControl : UserControl
+{
+    public AdLargeCardControl()
+    {
+        InitializeComponent();
+    }
+}

src/Everything2Everything.App/Views/MainWindow.xaml

@@ -3,6 +3,7 @@
                  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                  xmlns:ui="http://schemas.lepo.co/wpfui/2022/xaml"
                  xmlns:i="http://schemas.microsoft.com/xaml/behaviors"
+                 xmlns:local="clr-namespace:Everything2Everything.App.Views"
                  Title="Everything2Everything"
                  Icon="pack://application:,,,/Everything2Everything;component/Assets/app-icon.png"
                  Width="1280" Height="960"
@@ -327,6 +328,26 @@
                                         </ComboBox>
                                     </StackPanel>
 
+                                    <!-- E. AI 텍스트 변환 작업 선택기 (TXT/MD) -->
+                                    <StackPanel x:Name="AiQuickPanel" Margin="0,0,0,6" Visibility="Collapsed">
+                                        <TextBlock Text="AI 변환 작업" Style="{StaticResource FsLabelStyle}" Margin="0,0,0,4"/>
+                                        <ComboBox x:Name="AiTaskQuickCombo"
+                                                  AutomationProperties.AutomationId="AiTaskQuickCombo"
+                                                  SelectedIndex="{Binding Options.AiTaskIndex, RelativeSource={RelativeSource AncestorType=Window}, Mode=TwoWay}"
+                                                  SelectionChanged="OnAiTaskSelectionChanged">
+                                            <ComboBoxItem Content="핵심 요약 (Summarize)"/>
+                                            <ComboBoxItem Content="다국어 번역 (Translate)"/>
+                                            <ComboBoxItem Content="오탈자 및 문법 교정 (Proofread)"/>
+                                        </ComboBox>
+                                        <StackPanel x:Name="AiTargetLanguagePanel" Margin="0,8,0,0" Visibility="Collapsed">
+                                            <TextBlock Text="번역 대상 언어" Style="{StaticResource FsCaptionStyle}" Margin="0,0,0,4"/>
+                                            <TextBox x:Name="AiTargetLanguageBox"
+                                                     Style="{StaticResource FsPathInputStyle}"
+                                                     Padding="10,6"
+                                                     Text="{Binding Options.TargetLanguage, RelativeSource={RelativeSource AncestorType=Window}, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
+                                        </StackPanel>
+                                    </StackPanel>
+
                                     <!-- 5. 상세 인코딩 설정 (폴드아웃 Expander: 프리셋 직하단 위치) -->
                                     <Expander x:Name="AdvancedOptionsExpander"
                                               Margin="0,6,0,6"
@@ -666,17 +687,18 @@
                     <Border Grid.Row="0" Grid.Column="0"
                             Background="{StaticResource FsBgPanel}"
                             BorderBrush="{StaticResource FsBorderSubtle}"
-                            BorderThickness="0,0,1,1" Padding="16,8">
+                            BorderThickness="0,0,1,1" Padding="12,8">
                         <Grid>
                             <Grid.ColumnDefinitions>
-                                <ColumnDefinition Width="175"/>
-                                <ColumnDefinition Width="*"/>
+                                <ColumnDefinition Width="*" MinWidth="110"/>
+                                <ColumnDefinition Width="Auto"/>
+                                <ColumnDefinition Width="Auto"/>
                             </Grid.ColumnDefinitions>
-                            <!-- Search Box with Live Watermark & Clear Button -->
-                            <Grid Grid.Column="0" Width="175" VerticalAlignment="Center">
+                            <!-- Search Box with Live Watermark & Clear Button (Flex Width) -->
+                            <Grid Grid.Column="0" Margin="0,0,8,0" VerticalAlignment="Center">
                                 <TextBox x:Name="SearchBox" Style="{StaticResource FsPathInputStyle}"
                                          Padding="28,5,24,5" Text="{Binding SearchText, RelativeSource={RelativeSource AncestorType=Window}, UpdateSourceTrigger=PropertyChanged}"
-                                         ToolTip="파일명 또는 확장자로 검색" VerticalAlignment="Center"/>
+                                         ToolTip="파일명 또는 확장자로 검색" VerticalAlignment="Center" HorizontalAlignment="Stretch"/>
                                 <ui:SymbolIcon Symbol="Search24" FontSize="13" Foreground="{StaticResource FsTextTertiary}"
                                                HorizontalAlignment="Left" VerticalAlignment="Center" Margin="8,0,0,0" IsHitTestVisible="False"/>
                                 <TextBlock x:Name="SearchPlaceholderText"
@@ -720,49 +742,26 @@
                                     <ui:SymbolIcon Symbol="Dismiss24" FontSize="10" Foreground="{StaticResource FsTextTertiary}" VerticalAlignment="Center"/>
                                 </Button>
                             </Grid>
-                            <!-- Category Filter Chips & Inspector Toggle -->
-                            <StackPanel Grid.Column="1" Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Center">
-                                <Button Margin="0,0,3,0" Padding="7,3" Style="{StaticResource FsSecondaryButtonStyle}"
-                                        Command="{Binding FilterCategoryCommand, RelativeSource={RelativeSource AncestorType=Window}}"
-                                        CommandParameter="All">
-                                    <TextBlock Text="전체" FontSize="11" VerticalAlignment="Center"/>
-                                </Button>
-                                <Button Margin="0,0,3,0" Padding="7,3" Style="{StaticResource FsSecondaryButtonStyle}"
-                                        Command="{Binding FilterCategoryCommand, RelativeSource={RelativeSource AncestorType=Window}}"
-                                        CommandParameter="Image">
-                                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
-                                        <ui:SymbolIcon Symbol="Image24" FontSize="11" VerticalAlignment="Center" Margin="0,0,4,0"/>
-                                        <TextBlock Text="이미지" FontSize="11" VerticalAlignment="Center"/>
-                                    </StackPanel>
-                                </Button>
-                                <Button Margin="0,0,3,0" Padding="7,3" Style="{StaticResource FsSecondaryButtonStyle}"
-                                        Command="{Binding FilterCategoryCommand, RelativeSource={RelativeSource AncestorType=Window}}"
-                                        CommandParameter="Document">
-                                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
-                                        <ui:SymbolIcon Symbol="Document24" FontSize="11" VerticalAlignment="Center" Margin="0,0,4,0"/>
-                                        <TextBlock Text="문서" FontSize="11" VerticalAlignment="Center"/>
-                                    </StackPanel>
-                                </Button>
-                                <Button Margin="0,0,3,0" Padding="7,3" Style="{StaticResource FsSecondaryButtonStyle}"
-                                        Command="{Binding FilterCategoryCommand, RelativeSource={RelativeSource AncestorType=Window}}"
-                                        CommandParameter="Media">
-                                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
-                                        <ui:SymbolIcon Symbol="Video24" FontSize="11" VerticalAlignment="Center" Margin="0,0,4,0"/>
-                                        <TextBlock Text="미디어" FontSize="11" VerticalAlignment="Center"/>
-                                    </StackPanel>
-                                </Button>
-                                <Button Margin="0,0,3,0" Padding="7,3" Style="{StaticResource FsSecondaryButtonStyle}"
-                                        Command="{Binding FilterCategoryCommand, RelativeSource={RelativeSource AncestorType=Window}}"
-                                        CommandParameter="Data">
-                                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
-                                        <ui:SymbolIcon Symbol="Database24" FontSize="11" VerticalAlignment="Center" Margin="0,0,4,0"/>
-                                        <TextBlock Text="데이터" FontSize="11" VerticalAlignment="Center"/>
-                                    </StackPanel>
-                                </Button>
-                                <Border Width="1" Height="14" Background="{StaticResource FsBorderSubtle}" Margin="5,0"/>
-                                <Button Padding="7,3" Style="{StaticResource FsSecondaryButtonStyle}"
+                            <!-- 카테고리 필터 폴드아웃 드롭다운 -->
+                            <ComboBox x:Name="CategoryFilterCombo" Grid.Column="1"
+                                      AutomationProperties.AutomationId="CategoryFilterCombo"
+                                      MinWidth="90" Height="28" Padding="10,4"
+                                      FontSize="11" VerticalAlignment="Center"
+                                      ToolTip="카테고리 필터 (전체 · 이미지 · 문서 · 미디어 · 데이터)"
+                                      SelectionChanged="OnCategoryFilterSelectionChanged">
+                                <ComboBoxItem Tag="All" IsSelected="True" Content="전체"/>
+                                <ComboBoxItem Tag="Image" Content="이미지"/>
+                                <ComboBoxItem Tag="Document" Content="문서"/>
+                                <ComboBoxItem Tag="Media" Content="미디어"/>
+                                <ComboBoxItem Tag="Data" Content="데이터"/>
+                            </ComboBox>
+                            <!-- 구분선 & 미리보기 토글 버튼 -->
+                            <StackPanel Grid.Column="2" Orientation="Horizontal" VerticalAlignment="Center" Margin="6,0,0,0">
+                                <Border Width="1" Height="14" Background="{StaticResource FsBorderSubtle}" Margin="2,0,6,0"/>
+                                <Button Padding="7,4" Height="28" Style="{StaticResource FsSecondaryButtonStyle}"
                                         Command="{Binding ToggleInspectorCommand, RelativeSource={RelativeSource AncestorType=Window}}"
-                                        ToolTip="미리보기 패널 접기/펼치기">
+                                        ToolTip="미리보기 패널 접기/펼치기"
+                                        VerticalAlignment="Center">
                                     <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
                                         <ui:SymbolIcon Symbol="PreviewLink24" FontSize="11" VerticalAlignment="Center" Margin="0,0,4,0"/>
                                         <TextBlock Text="미리보기" FontSize="11" VerticalAlignment="Center"/>
@@ -774,8 +773,13 @@
 
                     <!-- 좌측: Active Queue OR Past Results -->
                     <Grid Grid.Row="1" Grid.Column="0">
-                    <!-- Active Queue view (default) -->
-                    <Grid x:Name="ActiveQueueView" Visibility="Visible">
+                        <Grid.RowDefinitions>
+                            <RowDefinition Height="*"/>
+                            <RowDefinition Height="Auto"/>
+                        </Grid.RowDefinitions>
+
+                        <!-- Active Queue view (default) -->
+                        <Grid x:Name="ActiveQueueView" Grid.Row="0" Visibility="Visible">
                         <Grid.RowDefinitions>
                             <RowDefinition Height="Auto"/>
                             <RowDefinition Height="*"/>
@@ -1012,7 +1016,7 @@
                 </Grid>
 
                     <!-- Past Results view -->
-                    <Grid x:Name="PastResultsContainer" Visibility="Collapsed">
+                    <Grid x:Name="PastResultsContainer" Grid.Row="0" Visibility="Collapsed">
                         <Grid.RowDefinitions>
                             <RowDefinition Height="Auto"/>
                             <RowDefinition Height="*"/>
@@ -1229,6 +1233,9 @@
                         </Grid>
                     </Grid>
 
+                        <!-- 가로 슬림 배너 광고 슬롯 -->
+                        <local:AdBannerControl Grid.Row="1" Margin="12,4,12,8"
+                                               DataContext="{Binding AdVm, RelativeSource={RelativeSource AncestorType=Window}}"/>
                     </Grid>
                     <!-- /좌측 컬럼 끝 -->
 
@@ -1468,6 +1475,10 @@
                                             </StackPanel>
                                         </Button>
                                     </Grid>
+
+                                    <!-- 대형 카드 광고 슬롯 (스폰서십 및 솔루션 안내) -->
+                                    <local:AdLargeCardControl Margin="0,12,0,0"
+                                                              DataContext="{Binding AdVm, RelativeSource={RelativeSource AncestorType=Window}}"/>
                                 </StackPanel>
                             </Border>
                         </Grid>

src/Everything2Everything.App/Views/MainWindow.xaml.cs

@@ -12,6 +12,7 @@ using Everything2Everything.App.Shell;
 using Everything2Everything.App.ViewModels;
 using Everything2Everything.Core;
 using Everything2Everything.Core.Filters;
+using Everything2Everything.Core.Ads;
 using Everything2Everything.Core.Inspector;
 using Everything2Everything.Core.Presets;
 using LossClass = Everything2Everything.Core.Providers.LossClass;
@@ -134,15 +135,22 @@ public partial class MainWindow : Wpf.Ui.Controls.FluentWindow, INotifyPropertyC
             if (_selectedCategory != value)
             {
                 _selectedCategory = value;
+                if (CategoryFilterCombo != null && CategoryFilterCombo.SelectedIndex != (int)value)
+                {
+                    CategoryFilterCombo.SelectedIndex = (int)value;
+                }
                 ApplyQueueFilters();
             }
         }
     }
 
-    public MainWindow(ConversionEngine engine, ISettingsStore settings, IReadOnlyList<string>? initialFiles = null)
+    public AdViewModel AdVm { get; }
+
+    public MainWindow(ConversionEngine engine, ISettingsStore settings, IReadOnlyList<string>? initialFiles = null, IAdService? adService = null)
     {
         _engine = engine;
         _settings = settings;
+        AdVm = new AdViewModel(adService ?? new AdService());
 
         AddFilesCommand = new RelayCommand(_ => PickAndAddFiles());
         ProcessQueueCommand = new RelayCommand(_ => OnProcessQueueClick(this, new RoutedEventArgs()),
@@ -828,6 +836,18 @@ public partial class MainWindow : Wpf.Ui.Controls.FluentWindow, INotifyPropertyC
         }
     }
 
+    private void OnCategoryFilterSelectionChanged(object sender, SelectionChangedEventArgs e)
+    {
+        if (CategoryFilterCombo?.SelectedItem is ComboBoxItem item && item.Tag is string tag)
+        {
+            ApplyFilterCategory(tag);
+        }
+        else if (CategoryFilterCombo != null && CategoryFilterCombo.SelectedIndex >= 0)
+        {
+            SelectedCategory = (FilterCategory)CategoryFilterCombo.SelectedIndex;
+        }
+    }
+
     private void ApplyFilterCategory(string? categoryName)
     {
         if (Enum.TryParse<FilterCategory>(categoryName, true, out var cat))
@@ -1540,9 +1560,25 @@ public partial class MainWindow : Wpf.Ui.Controls.FluentWindow, INotifyPropertyC
         if (PdfQuickPanel is not null)
             PdfQuickPanel.Visibility = isPdf ? Visibility.Visible : Visibility.Collapsed;
 
+        var isText = ext is ".txt" or ".md";
+        if (AiQuickPanel is not null)
+            AiQuickPanel.Visibility = isText ? Visibility.Visible : Visibility.Collapsed;
+        if (AiTargetLanguagePanel is not null && AiTaskQuickCombo is not null)
+            AiTargetLanguagePanel.Visibility = (isText && AiTaskQuickCombo.SelectedIndex == 1)
+                ? Visibility.Visible
+                : Visibility.Collapsed;
+
         UpdateMediaPanelForFormat(extension);
     }
 
+    private void OnAiTaskSelectionChanged(object sender, SelectionChangedEventArgs e)
+    {
+        if (AiTargetLanguagePanel is null || AiTaskQuickCombo is null) return;
+        AiTargetLanguagePanel.Visibility = AiTaskQuickCombo.SelectedIndex == 1
+            ? Visibility.Visible
+            : Visibility.Collapsed;
+    }
+
     /// <summary>출력이 영상/오디오/PDF/이미지일 때 상세 인코딩 폴드아웃 서브패널 노출(Fluent 2 점진적 공개 패턴).</summary>
     private void UpdateMediaPanelForFormat(string? extension)
     {

src/Everything2Everything.App/Views/QuickOptionsWindow.xaml

@@ -74,6 +74,20 @@
                 </ComboBox>
             </StackPanel>
 
+            <!-- AI 텍스트 처리 (txt/md) -->
+            <StackPanel x:Name="AiQuickPanel" Margin="0,18,0,0" Visibility="Collapsed">
+                <TextBlock Text="AI 작업 선택" Style="{StaticResource FsCaptionStyle}" Margin="0,0,0,4"/>
+                <ComboBox SelectedIndex="{Binding AiTaskIndex, Mode=TwoWay}">
+                    <ComboBoxItem Content="핵심 요약 (Summarize)"/>
+                    <ComboBoxItem Content="자연스러운 번역 (Translate)"/>
+                    <ComboBoxItem Content="오탈자 및 문법 교정 (Proofread)"/>
+                </ComboBox>
+                <TextBox Margin="0,8,0,0" Style="{StaticResource FsPathInputStyle}"
+                         Padding="10,6"
+                         Text="{Binding TargetLanguage, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
+                         ToolTip="번역 시 대상 언어 (예: 영어, 일본어, 중국어)"/>
+            </StackPanel>
+
             <!-- 버튼 -->
             <Grid Margin="0,22,0,0">
                 <Button HorizontalAlignment="Left" Content="자세히 옵션…"

src/Everything2Everything.App/Views/QuickOptionsWindow.xaml.cs

@@ -34,10 +34,12 @@ public partial class QuickOptionsWindow : FluentWindow
         var isVideo = ext is ".mp4" or ".mkv" or ".webm" or ".mov" or ".avi";
         var isLossyAudio = ext is ".mp3" or ".aac" or ".m4a" or ".opus" or ".ogg";
         var isImageQuality = ext is ".jpg" or ".jpeg" or ".webp" or ".avif";
+        var isText = ext is ".txt" or ".md";
 
         VideoQuickPanel.Visibility = isVideo ? Visibility.Visible : Visibility.Collapsed;
         AudioQuickPanel.Visibility = (isVideo || isLossyAudio) ? Visibility.Visible : Visibility.Collapsed;
         ImageQualityPanel.Visibility = isImageQuality ? Visibility.Visible : Visibility.Collapsed;
+        AiQuickPanel.Visibility = isText ? Visibility.Visible : Visibility.Collapsed;
 
         // 영상의 오디오 트랙임을 구분
         if (isVideo) AudioPanelLabel.Text = "오디오 비트레이트";

src/Everything2Everything.App/Views/SettingsWindow.xaml

@@ -39,12 +39,48 @@
 
                             <TextBlock Text="기본 백엔드" Style="{StaticResource FsLabelStyle}" Margin="0,0,0,6"/>
                             <ComboBox x:Name="BackendCombo" Margin="0,0,0,16">
-                                <ComboBoxItem Content="자동 (API 키 우선, 없으면 Codex)"/>
+                                <ComboBoxItem Content="자동 (API 키 우선 · Switchboard · Antigravity · Codex)"/>
+                                <ComboBoxItem Content="Switchboard 게이트웨이 (http://127.0.0.1:8787 · 로컬/LAN)"/>
+                                <ComboBoxItem Content="Antigravity CLI (agy · Gemini OAuth · 무료/구독)"/>
                                 <ComboBoxItem Content="OpenAI (API 키)"/>
                                 <ComboBoxItem Content="Anthropic (API 키)"/>
                                 <ComboBoxItem Content="Codex CLI (ChatGPT 구독 OAuth)"/>
                             </ComboBox>
 
+                            <!-- Switchboard Gateway -->
+                            <TextBlock Text="Switchboard 게이트웨이 (로컬/LAN 멀티에이전트 오케스트레이션)" Style="{StaticResource FsLabelStyle}" Margin="0,0,0,6"/>
+                            <Grid Margin="0,0,0,6">
+                                <Grid.ColumnDefinitions>
+                                    <ColumnDefinition Width="*"/>
+                                    <ColumnDefinition Width="Auto"/>
+                                    <ColumnDefinition Width="Auto"/>
+                                </Grid.ColumnDefinitions>
+                                <TextBox x:Name="SwitchboardEndpointBox" Grid.Column="0"
+                                         Style="{StaticResource FsPathInputStyle}"
+                                         TextChanged="OnSwitchboardEndpointChanged"/>
+                                <Button x:Name="SwitchboardVerifyBtn" Grid.Column="1" Content="테스트"
+                                        Style="{StaticResource FsSecondaryButtonStyle}" Margin="8,0,0,0"
+                                        Padding="12,6" Click="OnVerifySwitchboard"/>
+                                <Button x:Name="SwitchboardStartBtn" Grid.Column="2" Content="게이트웨이 기동"
+                                        Style="{StaticResource FsSecondaryButtonStyle}" Margin="8,0,0,0"
+                                        Padding="12,6" Click="OnStartSwitchboardGateway"/>
+                            </Grid>
+                            <StackPanel Orientation="Horizontal" VerticalAlignment="Center" Margin="0,0,0,16">
+                                <Ellipse x:Name="SwitchboardDot" Style="{StaticResource FsLossDotStyle}"
+                                         Fill="{StaticResource FsTextTertiary}" Margin="0,0,7,0" VerticalAlignment="Center"/>
+                                <TextBlock x:Name="SwitchboardStatus" Text="확인 중…" Style="{StaticResource FsCaptionStyle}" TextTrimming="CharacterEllipsis" VerticalAlignment="Center"/>
+                            </StackPanel>
+
+                            <!-- Antigravity CLI (OAuth) -->
+                            <TextBlock Text="Antigravity CLI (agy · Google OAuth · API 키 불필요)" Style="{StaticResource FsLabelStyle}" Margin="0,0,0,6"/>
+                            <StackPanel Orientation="Horizontal" VerticalAlignment="Center" Margin="0,0,0,16">
+                                <Ellipse x:Name="AgyDot" Style="{StaticResource FsLossDotStyle}"
+                                         Fill="{StaticResource FsTextTertiary}" Margin="0,0,7,0" VerticalAlignment="Center"/>
+                                <TextBlock x:Name="AgyStatus" Text="확인 중…" Style="{StaticResource FsCaptionStyle}" VerticalAlignment="Center"/>
+                                <Button x:Name="AgyVerifyBtn" Content="테스트" Style="{StaticResource FsSecondaryButtonStyle}"
+                                        Margin="12,0,0,0" Padding="10,4" IsEnabled="False" Click="OnVerifyAgy" VerticalAlignment="Center"/>
+                            </StackPanel>
+
                             <!-- OpenAI -->
                             <TextBlock Text="OpenAI API Key" Style="{StaticResource FsLabelStyle}" Margin="0,0,0,6"/>
                             <Grid Margin="0,0,0,4">
@@ -111,6 +147,9 @@
                             <TextBlock Text="외부 도구" Style="{StaticResource FsBodyStyle}" FontWeight="SemiBold" FontSize="15"/>
                             <TextBlock Text="설치하면 영상/오디오·한글/Word 변환이 자동 활성화됩니다."
                                        Style="{StaticResource FsCaptionStyle}" TextWrapping="Wrap" Margin="0,4,0,12"/>
+                            <Button Content="외부 도구 설치 / 검증" Style="{StaticResource FsSecondaryButtonStyle}"
+                                    Padding="14,6" HorizontalAlignment="Right" Margin="0,0,0,12"
+                                    Click="OnOpenToolInstaller"/>
                             <CheckBox x:Name="GpuToggle" Content="영상 변환 시 GPU 가속(NVENC) 시도 — 없으면 CPU 자동 전환"
                                       Foreground="{StaticResource FsTextSecondary}" IsChecked="True" Margin="0,0,0,16"/>
 

src/Everything2Everything.App/Views/SettingsWindow.xaml.cs

@@ -26,12 +26,15 @@ public partial class SettingsWindow : Wpf.Ui.Controls.FluentWindow
         var backend = (_settings.Get("ai.backend") ?? "auto").ToLowerInvariant();
         BackendCombo.SelectedIndex = backend switch
         {
-            "openai" => 1,
-            "anthropic" => 2,
-            "codex" => 3,
+            "switchboard" or "gateway" => 1,
+            "agy" => 2,
+            "openai" => 3,
+            "anthropic" => 4,
+            "codex" => 5,
             _ => 0,
         };
         ModelBox.Text = _settings.Get("ai.model") ?? string.Empty;
+        SwitchboardEndpointBox.Text = _settings.Get("switchboard.endpoint") ?? "http://127.0.0.1:8787";
 
         SetKeyStatus(OpenAiDot, OpenAiStatus, _settings.Contains("openai.apikey"), HasEnv("OPENAI_API_KEY"));
         SetKeyStatus(AnthropicDot, AnthropicStatus, _settings.Contains("anthropic.apikey"), HasEnv("ANTHROPIC_API_KEY"));
@@ -58,6 +61,9 @@ public partial class SettingsWindow : Wpf.Ui.Controls.FluentWindow
     private void OnAnthropicKeyChanged(object sender, RoutedEventArgs e)
         => AnthropicVerifyBtn.IsEnabled = AnthropicKeyBox.Password.StartsWith("sk-ant-", StringComparison.Ordinal);
 
+    private void OnSwitchboardEndpointChanged(object sender, TextChangedEventArgs e)
+        => _ = CheckSwitchboardGatewayAsync();
+
     private async void OnVerifyOpenAi(object sender, RoutedEventArgs e)
         => await VerifyAsync(OpenAiDot, OpenAiStatus, OpenAiVerifyBtn,
             new OpenAiChatClient(OpenAiKeyBox.Password), ModelOr("gpt-4o-mini"));
@@ -66,6 +72,63 @@ public partial class SettingsWindow : Wpf.Ui.Controls.FluentWindow
         => await VerifyAsync(AnthropicDot, AnthropicStatus, AnthropicVerifyBtn,
             new AnthropicChatClient(AnthropicKeyBox.Password), ModelOr("claude-3-5-sonnet-latest"));
 
+    private async void OnVerifySwitchboard(object sender, RoutedEventArgs e)
+    {
+        var ep = string.IsNullOrWhiteSpace(SwitchboardEndpointBox.Text)
+            ? (_settings.Get("switchboard.endpoint") ?? "http://127.0.0.1:8787")
+            : SwitchboardEndpointBox.Text.Trim();
+        await VerifyAsync(SwitchboardDot, SwitchboardStatus, SwitchboardVerifyBtn,
+            new SwitchboardChatClient(ep), ModelOr(string.Empty));
+        await CheckSwitchboardGatewayAsync();
+    }
+
+    private void OnStartSwitchboardGateway(object sender, RoutedEventArgs e)
+    {
+        try
+        {
+            var candidates = new[]
+            {
+                @"D:\workspace\Switchboard\start-gateway-lan.cmd",
+                @"D:\workspace\Switchboard\start-gateway-agy.cmd",
+                @"D:\workspace\Switchboard\start-gateway.cmd",
+            };
+            string? cmdPath = candidates.FirstOrDefault(System.IO.File.Exists);
+            if (cmdPath is null)
+            {
+                var baseDir = AppDomain.CurrentDomain.BaseDirectory;
+                var relativeCandidates = new[]
+                {
+                    System.IO.Path.GetFullPath(System.IO.Path.Combine(baseDir, "..", "..", "..", "..", "..", "Switchboard", "start-gateway-lan.cmd")),
+                    System.IO.Path.GetFullPath(System.IO.Path.Combine(baseDir, "..", "..", "..", "..", "..", "Switchboard", "start-gateway-agy.cmd")),
+                    System.IO.Path.GetFullPath(System.IO.Path.Combine(baseDir, "..", "..", "..", "..", "..", "Switchboard", "start-gateway.cmd")),
+                };
+                cmdPath = relativeCandidates.FirstOrDefault(System.IO.File.Exists);
+            }
+
+            if (cmdPath is not null)
+            {
+                Process.Start(new ProcessStartInfo
+                {
+                    FileName = cmdPath,
+                    UseShellExecute = true,
+                    WorkingDirectory = System.IO.Path.GetDirectoryName(cmdPath)!,
+                });
+                SwitchboardStatus.Text = "게이트웨이 기동 중… 잠시 후 테스트를 누르세요.";
+            }
+            else
+            {
+                SwitchboardStatus.Text = "런처 스크립트를 찾을 수 없습니다 (start-gateway-lan.cmd).";
+            }
+        }
+        catch (Exception ex)
+        {
+            SwitchboardStatus.Text = "기동 실패: " + Trunc(ex.Message);
+        }
+    }
+
+    private async void OnVerifyAgy(object sender, RoutedEventArgs e)
+        => await VerifyAsync(AgyDot, AgyStatus, AgyVerifyBtn, new AgyChatClient(), ModelOr(string.Empty));
+
     private async void OnVerifyCodex(object sender, RoutedEventArgs e)
         => await VerifyAsync(CodexDot, CodexStatus, CodexVerifyBtn, new CodexChatClient(), ModelOr(string.Empty));
 
@@ -107,23 +170,59 @@ public partial class SettingsWindow : Wpf.Ui.Controls.FluentWindow
         LibreDot.Fill = Res(libre ? "FsStatusSuccess" : "FsStatusWarn");
         LibreStatus.Text = libre ? "준비됨" : "미설치";
 
+        _ = CheckSwitchboardGatewayAsync();
+
+        var agy = ExternalToolDetector.IsAgyAvailable(out _);
+        AgyDot.Fill = Res(agy ? "FsStatusSuccess" : "FsTextTertiary");
+        AgyStatus.Text = agy ? "설치됨 — 키 없이 사용 가능" : "미설치 (winget install Google.AntigravityCLI)";
+        AgyVerifyBtn.IsEnabled = agy;
+
         var codex = ExternalToolDetector.IsCodexAvailable();
         CodexDot.Fill = Res(codex ? "FsStatusSuccess" : "FsTextTertiary");
         CodexStatus.Text = codex ? "설치됨 — 키 없이 사용 가능" : "미설치 (npm i -g @openai/codex)";
         CodexVerifyBtn.IsEnabled = codex;
     }
 
+    private async Task CheckSwitchboardGatewayAsync()
+    {
+        if (SwitchboardDot is null || SwitchboardStatus is null) return;
+        var ep = string.IsNullOrWhiteSpace(SwitchboardEndpointBox?.Text)
+            ? (_settings.Get("switchboard.endpoint") ?? "http://127.0.0.1:8787")
+            : SwitchboardEndpointBox.Text.Trim();
+        var (ok, profile, resolvedEp) = await ExternalToolDetector.CheckSwitchboardGatewayHealthAsync(ep);
+        if (ok)
+        {
+            SwitchboardDot.Fill = Res("FsStatusSuccess");
+            SwitchboardStatus.Text = string.IsNullOrWhiteSpace(profile)
+                ? $"실행 중 ({resolvedEp})"
+                : $"실행 중 ({resolvedEp} · {profile})";
+            if (SwitchboardStartBtn is not null) SwitchboardStartBtn.IsEnabled = false;
+        }
+        else
+        {
+            SwitchboardDot.Fill = Res("FsTextTertiary");
+            SwitchboardStatus.Text = $"미실행 ({ep})";
+            if (SwitchboardStartBtn is not null) SwitchboardStartBtn.IsEnabled = true;
+        }
+    }
+
     private void OnSave(object sender, RoutedEventArgs e)
     {
         var backend = BackendCombo.SelectedIndex switch
         {
-            1 => "openai",
-            2 => "anthropic",
-            3 => "codex",
+            1 => "switchboard",
+            2 => "agy",
+            3 => "openai",
+            4 => "anthropic",
+            5 => "codex",
             _ => "auto",
         };
         _settings.Set("ai.backend", backend);
 
+        var sbEndpoint = SwitchboardEndpointBox.Text?.Trim();
+        if (!string.IsNullOrEmpty(sbEndpoint))
+            _settings.Set("switchboard.endpoint", sbEndpoint);
+
         var model = ModelBox.Text?.Trim();
         if (string.IsNullOrEmpty(model)) _settings.Remove("ai.model");
         else _settings.Set("ai.model", model);
@@ -137,6 +236,13 @@ public partial class SettingsWindow : Wpf.Ui.Controls.FluentWindow
 
     private void OnClose(object sender, RoutedEventArgs e) => Close();
 
+    private void OnOpenToolInstaller(object sender, RoutedEventArgs e)
+    {
+        var win = new ToolSetupWindow { Owner = this };
+        win.ShowDialog();
+        RefreshToolStatus();
+    }
+
     private void OnDownloadFfmpeg(object sender, RoutedEventArgs e)
         => OpenUrl("https://github.com/BtbN/FFmpeg-Builds/releases");
 

src/Everything2Everything.App/Views/ToolSetupWindow.xaml

@@ -0,0 +1,88 @@
+<ui:FluentWindow x:Class="Everything2Everything.App.Views.ToolSetupWindow"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:ui="http://schemas.lepo.co/wpfui/2022/xaml"
+    Title="처음 설정 — 외부 도구 설치"
+    Width="640" Height="680"
+    WindowStartupLocation="CenterScreen"
+    ExtendsContentIntoTitleBar="True"
+    WindowBackdropType="Mica"
+    Background="{DynamicResource FsBgBase}">
+
+    <Window.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ui:ControlsDictionary/>
+                <ResourceDictionary Source="FormatShiftTheme.xaml"/>
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Window.Resources>
+
+    <Grid Background="{StaticResource FsBgBase}">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="*"/>
+            <RowDefinition Height="Auto"/>
+        </Grid.RowDefinitions>
+
+        <ui:TitleBar Grid.Row="0" Title="처음 설정" ShowMaximize="False" ShowMinimize="False"/>
+
+        <ScrollViewer Grid.Row="1" VerticalScrollBarVisibility="Auto" Padding="24,8,24,16">
+            <StackPanel>
+                <TextBlock Text="필요한 외부 도구를 설치합니다."
+                           Style="{StaticResource FsBodyStyle}" FontWeight="SemiBold" FontSize="16"/>
+                <TextBlock Text="변환에 필요한 외부 도구 목록입니다. 기본값은 모두 선택된 상태이며, 아래 버튼으로 한 번에 순차 설치합니다. 이미 설치된 도구는 설치 단계에서 확인만 됩니다. (H2Orestart는 라이선스상 자동 설치 대신 직접 추가가 필요합니다.)"
+                           Style="{StaticResource FsCaptionStyle}" TextWrapping="Wrap" Margin="0,4,0,16"/>
+
+                <ItemsControl ItemsSource="{Binding Tools}">
+                    <ItemsControl.ItemTemplate>
+                        <DataTemplate>
+                            <Border Style="{StaticResource FsDoubleBezelShellStyle}" Margin="0,0,0,10" HorizontalAlignment="Stretch">
+                                <Border Style="{StaticResource FsDoubleBezelCoreStyle}" Padding="16,12">
+                                    <Grid>
+                                        <Grid.ColumnDefinitions>
+                                            <ColumnDefinition Width="Auto"/>
+                                            <ColumnDefinition Width="*"/>
+                                            <ColumnDefinition Width="Auto"/>
+                                        </Grid.ColumnDefinitions>
+                                        <CheckBox Grid.Column="0" IsChecked="{Binding IsSelected}"
+                                                  VerticalAlignment="Center" Margin="0,0,12,0"/>
+                                        <StackPanel Grid.Column="1" Margin="0,0,12,0">
+                                            <TextBlock Text="{Binding Name}" Style="{StaticResource FsBodyStyle}" FontWeight="Medium"/>
+                                            <TextBlock Text="{Binding Description}" Style="{StaticResource FsCaptionStyle}"
+                                                       TextWrapping="Wrap" Margin="0,3,0,0"/>
+                                        </StackPanel>
+                                        <StackPanel Grid.Column="2" Orientation="Horizontal" VerticalAlignment="Center">
+                                            <Ellipse Width="9" Height="9" Style="{StaticResource FsLossDotStyle}"
+                                                     Fill="{Binding StatusBrush}" VerticalAlignment="Center" Margin="0,0,7,0"/>
+                                            <TextBlock Text="{Binding StatusText}" Style="{StaticResource FsCaptionStyle}"
+                                                       VerticalAlignment="Center"/>
+                                        </StackPanel>
+                                    </Grid>
+                                </Border>
+                            </Border>
+                        </DataTemplate>
+                    </ItemsControl.ItemTemplate>
+                </ItemsControl>
+            </StackPanel>
+        </ScrollViewer>
+
+        <Border Grid.Row="2" Background="{StaticResource FsBgPanel}"
+                BorderBrush="{StaticResource FsBorderSubtle}" BorderThickness="0,1,0,0" Padding="24,14">
+            <Grid>
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="Auto"/>
+                    <ColumnDefinition Width="*"/>
+                    <ColumnDefinition Width="Auto"/>
+                </Grid.ColumnDefinitions>
+                <CheckBox Grid.Column="0" IsChecked="{Binding SelectAll}" Content="전체 선택"
+                          Foreground="{StaticResource FsTextSecondary}" VerticalAlignment="Center"/>
+                <StackPanel Grid.Column="2" Orientation="Horizontal" HorizontalAlignment="Right">
+                    <Button Content="나중에" Style="{StaticResource FsSecondaryButtonStyle}" Padding="20,8" Click="OnLater"/>
+                    <Button x:Name="InstallButton" Content="설치 시작"
+                            Style="{StaticResource FsPrimaryButtonStyle}" Padding="20,8" Margin="8,0,0,0" Click="OnInstall"/>
+                </StackPanel>
+            </Grid>
+        </Border>
+    </Grid>
+</ui:FluentWindow>

src/Everything2Everything.App/Views/ToolSetupWindow.xaml.cs

@@ -0,0 +1,46 @@
+using System.Threading;
+using System.Windows;
+using Everything2Everything.App.ViewModels;
+
+namespace Everything2Everything.App.Views;
+
+/// <summary>첫 실행 외부 도구 설치 마법사. 선택된(기본 전체) 도구를 순차 설치하고 상태를 갱신한다.</summary>
+public partial class ToolSetupWindow : Wpf.Ui.Controls.FluentWindow
+{
+    private readonly ToolSetupViewModel _vm;
+    private CancellationTokenSource? _cts;
+
+    public ToolSetupWindow()
+    {
+        InitializeComponent();
+        _vm = new ToolSetupViewModel();
+        DataContext = _vm;
+    }
+
+    private async void OnInstall(object sender, RoutedEventArgs e)
+    {
+        if (_vm.IsInstalling) return;
+        _cts = new CancellationTokenSource();
+        InstallButton.IsEnabled = false;
+        try
+        {
+            await _vm.InstallSelectedAsync(_cts.Token);
+        }
+        finally
+        {
+            InstallButton.IsEnabled = true;
+        }
+    }
+
+    private void OnLater(object sender, RoutedEventArgs e)
+    {
+        _cts?.Cancel();
+        Close();
+    }
+
+    protected override void OnClosed(EventArgs e)
+    {
+        _cts?.Cancel();
+        base.OnClosed(e);
+    }
+}