feat(installer): add WPF installer/configurator project

Standalone WPF app (ClaudeDo.Installer) that handles full installation
and ongoing configuration of ClaudeDo. Two modes: wizard for first run,
tabbed settings panel for subsequent launches. Page-based extensibility
via IInstallerPage interface — adding new config sections requires only
one new class.

Install pipeline: dotnet publish, deploy binaries, write configs, init
DB (via SchemaInitializer from ClaudeDo.Data), register Windows Service,
create shortcuts. Dark theme matching the Avalonia app (forest teal accent).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/ClaudeDo.Installer/Views/SettingsViewModel.cs

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+using System.Windows;
+using ClaudeDo.Installer.Core;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+
+namespace ClaudeDo.Installer.Views;
+
+public partial class SettingsViewModel : ObservableObject
+{
+    private readonly InstallContext _context;
+
+    public IReadOnlyList<IInstallerPage> Pages { get; }
+
+    [ObservableProperty]
+    private IInstallerPage? _selectedPage;
+
+    [ObservableProperty]
+    private string? _statusMessage;
+
+    [ObservableProperty]
+    private bool _isStatusError;
+
+    public SettingsViewModel(PageResolver resolver, InstallContext context)
+    {
+        Pages = resolver.SettingsPages;
+        _context = context;
+        _selectedPage = Pages.FirstOrDefault();
+
+        _ = LoadAllAsync();
+    }
+
+    private async Task LoadAllAsync()
+    {
+        foreach (var page in Pages)
+            await page.LoadAsync();
+    }
+
+    [RelayCommand]
+    private async Task Apply()
+    {
+        // Validate all pages
+        foreach (var page in Pages)
+        {
+            if (!page.Validate())
+            {
+                SelectedPage = page;
+                StatusMessage = $"Validation failed on {page.Title}. Please fix the errors.";
+                IsStatusError = true;
+                return;
+            }
+        }
+
+        // Apply all pages (writes to InstallContext)
+        foreach (var page in Pages)
+            await page.ApplyAsync();
+
+        // Write config files directly
+        var workerCfg = new InstallerWorkerConfig
+        {
+            DbPath = _context.DbPath,
+            SandboxRoot = _context.SandboxRoot,
+            LogRoot = _context.LogRoot,
+            WorktreeRootStrategy = _context.WorktreeRootStrategy,
+            CentralWorktreeRoot = _context.CentralWorktreeRoot,
+            QueueBackstopIntervalMs = _context.QueueBackstopIntervalMs,
+            SignalRPort = _context.SignalRPort,
+            ClaudeBin = _context.ClaudeBin,
+        };
+        workerCfg.Save();
+
+        var uiCfg = new InstallerAppSettings
+        {
+            DbPath = _context.UiDbPath,
+            SignalRUrl = _context.SignalRUrl,
+        };
+        uiCfg.Save();
+
+        StatusMessage = "Settings saved successfully.";
+        IsStatusError = false;
+    }
+
+    [RelayCommand]
+    private void Close()
+    {
+        Application.Current.Shutdown();
+    }
+}

src/ClaudeDo.Installer/Views/SettingsWindow.xaml

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+<Window x:Class="ClaudeDo.Installer.Views.SettingsWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:views="clr-namespace:ClaudeDo.Installer.Views"
+        Title="ClaudeDo Settings"
+        Width="720" Height="520"
+        MinWidth="620" MinHeight="460"
+        WindowStartupLocation="CenterScreen"
+        d:DataContext="{d:DesignInstance views:SettingsViewModel}"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        mc:Ignorable="d">
+
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="*"/>
+            <RowDefinition Height="Auto"/>
+        </Grid.RowDefinitions>
+
+        <!-- Main content area -->
+        <Grid Grid.Row="0">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="180"/>
+                <ColumnDefinition Width="Auto"/>
+                <ColumnDefinition Width="*"/>
+            </Grid.ColumnDefinitions>
+
+            <!-- Sidebar -->
+            <Border Grid.Column="0" Background="{StaticResource SidebarBgBrush}"
+                    Padding="8,12">
+                <ListBox ItemsSource="{Binding Pages}"
+                         SelectedItem="{Binding SelectedPage}"
+                         HorizontalContentAlignment="Stretch">
+                    <ListBox.ItemTemplate>
+                        <DataTemplate>
+                            <StackPanel Orientation="Horizontal">
+                                <TextBlock Text="{Binding Icon}" FontSize="14" Margin="0,0,8,0"
+                                           VerticalAlignment="Center"/>
+                                <TextBlock Text="{Binding Title}" FontSize="13"/>
+                            </StackPanel>
+                        </DataTemplate>
+                    </ListBox.ItemTemplate>
+                </ListBox>
+            </Border>
+
+            <!-- Separator -->
+            <Border Grid.Column="1" Width="1" Background="{StaticResource BorderSubtleBrush}"/>
+
+            <!-- Page content -->
+            <Border Grid.Column="2" Padding="24,20">
+                <ContentControl Content="{Binding SelectedPage.View}"/>
+            </Border>
+        </Grid>
+
+        <!-- Bottom Bar -->
+        <Border Grid.Row="1" Background="{StaticResource IslandBgBrush}"
+                BorderBrush="{StaticResource BorderSubtleBrush}" BorderThickness="0,1,0,0"
+                Padding="20,12">
+            <Grid>
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="*"/>
+                    <ColumnDefinition Width="Auto"/>
+                    <ColumnDefinition Width="Auto"/>
+                </Grid.ColumnDefinitions>
+
+                <!-- Status message -->
+                <TextBlock Grid.Column="0" Text="{Binding StatusMessage}"
+                           VerticalAlignment="Center" FontSize="12">
+                    <TextBlock.Style>
+                        <Style TargetType="TextBlock">
+                            <Setter Property="Foreground" Value="{StaticResource AccentBrush}"/>
+                            <Style.Triggers>
+                                <DataTrigger Binding="{Binding IsStatusError}" Value="True">
+                                    <Setter Property="Foreground" Value="{StaticResource ErrorBrush}"/>
+                                </DataTrigger>
+                            </Style.Triggers>
+                        </Style>
+                    </TextBlock.Style>
+                </TextBlock>
+
+                <Button Grid.Column="1" Content="Close"
+                        Command="{Binding CloseCommand}"
+                        Margin="0,0,8,0" MinWidth="80"/>
+
+                <Button Grid.Column="2" Content="Save &amp; Apply"
+                        Command="{Binding ApplyCommand}"
+                        Style="{StaticResource AccentButton}"
+                        MinWidth="100"/>
+            </Grid>
+        </Border>
+    </Grid>
+</Window>

src/ClaudeDo.Installer/Views/SettingsWindow.xaml.cs

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+using System.Windows;
+
+namespace ClaudeDo.Installer.Views;
+
+public partial class SettingsWindow : Window
+{
+    public SettingsWindow()
+    {
+        InitializeComponent();
+    }
+}

src/ClaudeDo.Installer/Views/WizardViewModel.cs

@@ -0,0 +1,77 @@
+using System.Windows;
+using ClaudeDo.Installer.Core;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+
+namespace ClaudeDo.Installer.Views;
+
+public partial class WizardViewModel : ObservableObject
+{
+    private readonly InstallContext _context;
+
+    public IReadOnlyList<IInstallerPage> Pages { get; }
+
+    [ObservableProperty]
+    [NotifyPropertyChangedFor(nameof(CanGoBack))]
+    [NotifyPropertyChangedFor(nameof(IsLastPage))]
+    [NotifyPropertyChangedFor(nameof(NextButtonText))]
+    [NotifyPropertyChangedFor(nameof(CurrentPage))]
+    private int _currentPageIndex;
+
+    public IInstallerPage CurrentPage => Pages[CurrentPageIndex];
+    public bool CanGoBack => CurrentPageIndex > 0;
+    public bool IsLastPage => CurrentPageIndex == Pages.Count - 1;
+    public string NextButtonText => IsLastPage ? "Install" : "Next \u2192";
+
+    [ObservableProperty]
+    private string? _validationError;
+
+    public WizardViewModel(PageResolver resolver, InstallContext context)
+    {
+        Pages = resolver.WizardPages;
+        _context = context;
+
+        if (Pages.Count > 0)
+            _ = InitAsync();
+    }
+
+    private async Task InitAsync()
+    {
+        try { await Pages[0].LoadAsync(); }
+        catch { /* first page loads with defaults on error */ }
+    }
+
+    [RelayCommand]
+    private async Task GoBack()
+    {
+        if (!CanGoBack) return;
+        CurrentPageIndex--;
+        await CurrentPage.LoadAsync();
+        ValidationError = null;
+    }
+
+    [RelayCommand]
+    private async Task GoNext()
+    {
+        if (!CurrentPage.Validate())
+        {
+            ValidationError = "Please fix the highlighted errors before continuing.";
+            return;
+        }
+
+        ValidationError = null;
+        await CurrentPage.ApplyAsync();
+
+        if (CurrentPageIndex < Pages.Count - 1)
+        {
+            CurrentPageIndex++;
+            await CurrentPage.LoadAsync();
+        }
+    }
+
+    [RelayCommand]
+    private void Close()
+    {
+        Application.Current.Shutdown();
+    }
+}

src/ClaudeDo.Installer/Views/WizardWindow.xaml

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+<Window x:Class="ClaudeDo.Installer.Views.WizardWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:views="clr-namespace:ClaudeDo.Installer.Views"
+        Title="ClaudeDo Installer"
+        Width="720" Height="520"
+        MinWidth="620" MinHeight="460"
+        WindowStartupLocation="CenterScreen"
+        d:DataContext="{d:DesignInstance views:WizardViewModel}"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        mc:Ignorable="d">
+
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="*"/>
+            <RowDefinition Height="Auto"/>
+        </Grid.RowDefinitions>
+
+        <!-- Step Indicator -->
+        <Border Grid.Row="0" Background="{StaticResource IslandBgBrush}"
+                BorderBrush="{StaticResource BorderSubtleBrush}" BorderThickness="0,0,0,1"
+                Padding="20,14">
+            <ItemsControl ItemsSource="{Binding Pages}">
+                <ItemsControl.ItemsPanel>
+                    <ItemsPanelTemplate>
+                        <StackPanel Orientation="Horizontal"/>
+                    </ItemsPanelTemplate>
+                </ItemsControl.ItemsPanel>
+                <ItemsControl.ItemTemplate>
+                    <DataTemplate>
+                        <Border x:Name="StepBorder" CornerRadius="4" Padding="10,5" Margin="0,0,6,0"
+                                BorderThickness="1">
+                            <Border.Background>
+                                <MultiBinding Converter="{StaticResource StepActiveConverter}" ConverterParameter="Background">
+                                    <Binding/>
+                                    <Binding RelativeSource="{RelativeSource AncestorType=Window}" Path="DataContext.CurrentPage"/>
+                                </MultiBinding>
+                            </Border.Background>
+                            <Border.BorderBrush>
+                                <MultiBinding Converter="{StaticResource StepActiveConverter}" ConverterParameter="BorderBrush">
+                                    <Binding/>
+                                    <Binding RelativeSource="{RelativeSource AncestorType=Window}" Path="DataContext.CurrentPage"/>
+                                </MultiBinding>
+                            </Border.BorderBrush>
+                            <TextBlock Text="{Binding Title}" FontSize="12">
+                                <TextBlock.Foreground>
+                                    <MultiBinding Converter="{StaticResource StepActiveConverter}" ConverterParameter="Foreground">
+                                        <Binding/>
+                                        <Binding RelativeSource="{RelativeSource AncestorType=Window}" Path="DataContext.CurrentPage"/>
+                                    </MultiBinding>
+                                </TextBlock.Foreground>
+                            </TextBlock>
+                        </Border>
+                    </DataTemplate>
+                </ItemsControl.ItemTemplate>
+            </ItemsControl>
+        </Border>
+
+        <!-- Page Content -->
+        <Border Grid.Row="1" Padding="24,20">
+            <ContentControl Content="{Binding CurrentPage.View}"/>
+        </Border>
+
+        <!-- Bottom Bar -->
+        <Border Grid.Row="2" Background="{StaticResource IslandBgBrush}"
+                BorderBrush="{StaticResource BorderSubtleBrush}" BorderThickness="0,1,0,0"
+                Padding="20,12">
+            <Grid>
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="*"/>
+                    <ColumnDefinition Width="Auto"/>
+                    <ColumnDefinition Width="Auto"/>
+                </Grid.ColumnDefinitions>
+
+                <!-- Validation error -->
+                <TextBlock Grid.Column="0" Text="{Binding ValidationError}"
+                           Foreground="{StaticResource ErrorBrush}"
+                           VerticalAlignment="Center" FontSize="12"
+                           Visibility="{Binding ValidationError, Converter={StaticResource NullToCollapsedConverter}}"/>
+
+                <Button Grid.Column="1" Content="Back"
+                        Command="{Binding GoBackCommand}"
+                        IsEnabled="{Binding CanGoBack}"
+                        Margin="0,0,8,0" MinWidth="80"/>
+
+                <Button Grid.Column="2" Content="{Binding NextButtonText}"
+                        Command="{Binding GoNextCommand}"
+                        Style="{StaticResource AccentButton}"
+                        MinWidth="100"/>
+            </Grid>
+        </Border>
+    </Grid>
+</Window>

src/ClaudeDo.Installer/Views/WizardWindow.xaml.cs

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+using System.Windows;
+
+namespace ClaudeDo.Installer.Views;
+
+public partial class WizardWindow : Window
+{
+    public WizardWindow()
+    {
+        InitializeComponent();
+    }
+}