feat(manager): implement GUI dashboard with config management

10 files changed, 936 insertions, 27 deletions

diff --git a/.gitignore b/.gitignore
index 336b5e8..6090947 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /target
 /models
 /build
+/.idea
diff --git a/manager/App.axaml b/manager/App.axaml
index d9eaaee..7b5a966 100644
--- a/manager/App.axaml
+++ b/manager/App.axaml
@@ -1,10 +1,10 @@
-<Application xmlns="https://github.com/avaloniaui"
-             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             x:Class="manager.App"
-             RequestedThemeVariant="Default">
-             <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->
-
+<Application
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    x:Class="manager.App"
+    RequestedThemeVariant="Default"
+>
     <Application.Styles>
-        <FluentTheme />
+        <SimpleTheme />
     </Application.Styles>
-</Application>
\ No newline at end of file
+</Application>
diff --git a/manager/MainWindow.axaml b/manager/MainWindow.axaml
index 1aa61b8..84337ad 100644
--- a/manager/MainWindow.axaml
+++ b/manager/MainWindow.axaml
@@ -1,9 +1,240 @@
-<Window xmlns="https://github.com/avaloniaui"
-        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
-        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-        x:Class="manager.MainWindow"
-        Title="manager">
-    Welcome to Avalonia!
+<Window
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d"
+    d:DesignWidth="800"
+    d:DesignHeight="450"
+    x:Class="manager.MainWindow"
+    Title="DMVOP Manager"
+    Width="800"
+    MinWidth="500"
+>
+    <Grid ColumnDefinitions="Auto,*">
+        <ScrollViewer Grid.Column="0" Width="300" Background="#2d2d2d">
+            <StackPanel Margin="10" Spacing="12">
+                <StackPanel Spacing="4">
+                    <TextBlock
+                        Text="Device"
+                        FontWeight="Bold"
+                        Foreground="White"
+                    />
+                    <TextBox
+                        x:Name="DeviceBox"
+                        Text="auto"
+                        Watermark="device name or auto"
+                    />
+                </StackPanel>
+
+                <StackPanel Spacing="4">
+                    <TextBlock
+                        Text="Output Format"
+                        FontWeight="Bold"
+                        Foreground="White"
+                    />
+                    <TextBox
+                        x:Name="FormatBox"
+                        Text="%{vol},%{word}"
+                        Watermark="e.g. %{vol},%{word}"
+                    />
+                </StackPanel>
+
+                <StackPanel Spacing="4">
+                    <TextBlock
+                        Text="Model"
+                        FontWeight="Bold"
+                        Foreground="White"
+                    />
+                    <Grid ColumnDefinitions="*,Auto" ColumnSpacing="6">
+                        <ComboBox
+                            x:Name="ModelBox"
+                            Grid.Column="0"
+                            SelectedIndex="0"
+                        >
+                            <ComboBoxItem Content="tiny.en" />
+                            <ComboBoxItem Content="tiny" />
+                            <ComboBoxItem Content="base.en" />
+                            <ComboBoxItem Content="base" />
+                            <ComboBoxItem Content="small.en" />
+                            <ComboBoxItem Content="small" />
+                            <ComboBoxItem Content="medium.en" />
+                            <ComboBoxItem Content="medium" />
+                            <ComboBoxItem Content="large_v3_turbo" />
+                            <ComboBoxItem Content="large_v3" />
+                        </ComboBox>
+                        <Button
+                            x:Name="DownloadModelButton"
+                            Grid.Column="1"
+                            Content="Download"
+                            Width="60"
+                        />
+                    </Grid>
+                </StackPanel>
+
+                <StackPanel Spacing="4">
+                    <TextBlock
+                        Text="Language"
+                        FontWeight="Bold"
+                        Foreground="White"
+                    />
+                    <TextBox
+                        x:Name="LangBox"
+                        Text="en"
+                        Watermark="e.g. en, zh, ja"
+                    />
+                </StackPanel>
+
+                <StackPanel Spacing="4">
+                    <TextBlock
+                        Text="Output Modes"
+                        FontWeight="Bold"
+                        Foreground="White"
+                    />
+                    <CheckBox
+                        x:Name="StdoutCheck"
+                        Content="stdout"
+                        IsChecked="True"
+                    />
+                    <CheckBox
+                        x:Name="TcpCheck"
+                        Content="tcp"
+                        IsChecked="True"
+                    />
+                    <CheckBox x:Name="UdpCheck" Content="udp" />
+                    <CheckBox
+                        x:Name="UdpBroadcastCheck"
+                        Content="udp-broadcast"
+                    />
+                    <CheckBox x:Name="IpcCheck" Content="ipc (Unix only)" />
+                </StackPanel>
+
+                <StackPanel Spacing="4">
+                    <TextBlock
+                        Text="Port"
+                        FontWeight="Bold"
+                        Foreground="White"
+                    />
+                    <TextBox
+                        x:Name="PortBox"
+                        Text="5117"
+                        Watermark="port number"
+                    />
+                </StackPanel>
+
+                <StackPanel Spacing="4">
+                    <TextBlock
+                        Text="Instant Mode"
+                        FontWeight="Bold"
+                        Foreground="White"
+                    />
+                    <CheckBox
+                        x:Name="InstantCheck"
+                        IsChecked="False"
+                        Content="Enable"
+                    />
+                </StackPanel>
+
+                <StackPanel Spacing="4">
+                    <TextBlock
+                        Text="Subnet Mask"
+                        FontWeight="Bold"
+                        Foreground="White"
+                    />
+                    <TextBox
+                        x:Name="SubnetMaskBox"
+                        Text="255.255.255.0"
+                        Watermark="e.g. 255.255.255.0"
+                    />
+                </StackPanel>
+
+                <StackPanel x:Name="SocketFilePanel" Spacing="4">
+                    <TextBlock
+                        Text="Socket File"
+                        FontWeight="Bold"
+                        Foreground="White"
+                    />
+                    <TextBox
+                        x:Name="SocketFileBox"
+                        Text="./dmvop.sock"
+                        Watermark="path to socket file"
+                    />
+                </StackPanel>
+
+                <StackPanel Spacing="4">
+                    <TextBlock
+                        Text="Models Directory"
+                        FontWeight="Bold"
+                        Foreground="White"
+                    />
+                    <TextBox x:Name="ModelsDirBox" Watermark="./models" />
+                </StackPanel>
+
+                <StackPanel Spacing="4">
+                    <TextBlock
+                        Text="Post-processor"
+                        FontWeight="Bold"
+                        Foreground="White"
+                    />
+                    <TextBox x:Name="PostBox" Watermark="e.g. +pinyin(tone)" />
+                </StackPanel>
+
+                <TextBlock
+                    x:Name="StatusLabel"
+                    Text="Ready"
+                    Foreground="#aaa"
+                    FontSize="12"
+                />
+
+                <TextBlock Height="8" />
+            </StackPanel>
+        </ScrollViewer>
+
+        <Grid Grid.Column="1" Background="#1e1e1e" RowDefinitions="Auto,*">
+            <Border Grid.Row="0" Background="#252525" Padding="12,8">
+                <Grid ColumnDefinitions="Auto,Auto,*">
+                    <Ellipse
+                        x:Name="StatusLight"
+                        Width="14"
+                        Height="14"
+                        Fill="Red"
+                        VerticalAlignment="Center"
+                        Margin="0,0,8,0"
+                    />
+
+                    <TextBlock
+                        x:Name="StatusTextRight"
+                        Grid.Column="1"
+                        Text="Stopped"
+                        Foreground="#888"
+                        FontSize="14"
+                        VerticalAlignment="Center"
+                    />
+
+                    <Button
+                        x:Name="ActionButton"
+                        Grid.Column="2"
+                        Content="Start"
+                        Width="90"
+                        Height="28"
+                        FontSize="13"
+                        HorizontalAlignment="Right"
+                        VerticalAlignment="Center"
+                    />
+                </Grid>
+            </Border>
+
+            <ScrollViewer Grid.Row="1" Background="#1a1a1a" Margin="0,1,0,0">
+                <TextBlock
+                    x:Name="OutputArea"
+                    FontFamily="Consolas, Courier New, monospace"
+                    FontSize="12"
+                    Foreground="#aaa"
+                    Text=""
+                    TextWrapping="Wrap"
+                    Margin="8"
+                />
+            </ScrollViewer>
+        </Grid>
+    </Grid>
 </Window>
diff --git a/manager/MainWindow.axaml.cs b/manager/MainWindow.axaml.cs
index 82d8dc2..6abbd0e 100644
--- a/manager/MainWindow.axaml.cs
+++ b/manager/MainWindow.axaml.cs
@@ -1,11 +1,450 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
 using Avalonia.Controls;
+using Avalonia.Media;
+using Avalonia.Threading;
+using Tomlyn;
+using Tomlyn.Model;
 
 namespace manager;
 
 public partial class MainWindow : Window
 {
+    private readonly string _configDir;
+    private readonly string _sourceToml;
+    private readonly string _guiConfigPath;
+    private bool _dirty;
+    private bool _loading;
+    private bool _promptingClose;
+    private bool _dmvopRunning;
+    private Process? _dmvopProcess;
+    private readonly StringBuilder _dmvopOutput = new();
+    private const string BaseTitle = "DumbVoiceProtocol";
+
     public MainWindow()
     {
         InitializeComponent();
+
+        // Parent directory of the program location = build/
+        _configDir = Path.GetFullPath(Path.Combine(AppContext.BaseDirectory, ".."));
+        _sourceToml = Path.Combine(_configDir, "dmvop.toml");
+        _guiConfigPath = Path.Combine(_configDir, "dmvop-gui.toml");
+
+        DownloadModelButton.Click += OnDownloadModel;
+        KeyDown += OnKeyDown;
+
+        // Hide Unix-specific items on Windows
+        if (OperatingSystem.IsWindows())
+        {
+            IpcCheck.IsVisible = false;
+            SocketFilePanel.IsVisible = false;
+        }
+
+        // Mark dirty on all input control changes
+        SubscribeChanges();
+
+        Closing += OnClosing;
+
+        ActionButton.Click += OnActionButton;
+        _ = StartDashboardTimer();
+
+        LoadConfig();
+    }
+
+    private void SubscribeChanges()
+    {
+        // TextBoxes
+        DeviceBox.TextChanged += (_, _) => MarkDirty();
+        FormatBox.TextChanged += (_, _) => MarkDirty();
+        LangBox.TextChanged += (_, _) => MarkDirty();
+        PortBox.TextChanged += (_, _) => MarkDirty();
+        SubnetMaskBox.TextChanged += (_, _) => MarkDirty();
+        SocketFileBox.TextChanged += (_, _) => MarkDirty();
+        ModelsDirBox.TextChanged += (_, _) => MarkDirty();
+        PostBox.TextChanged += (_, _) => MarkDirty();
+
+        // ComboBox
+        ModelBox.SelectionChanged += (_, _) => MarkDirty();
+
+        // CheckBoxes
+        StdoutCheck.IsCheckedChanged += (_, _) => MarkDirty();
+        TcpCheck.IsCheckedChanged += (_, _) => MarkDirty();
+        UdpCheck.IsCheckedChanged += (_, _) => MarkDirty();
+        UdpBroadcastCheck.IsCheckedChanged += (_, _) => MarkDirty();
+        IpcCheck.IsCheckedChanged += (_, _) => MarkDirty();
+        InstantCheck.IsCheckedChanged += (_, _) => MarkDirty();
+    }
+
+    private void MarkDirty()
+    {
+        if (_loading || _dirty) return;
+        _dirty = true;
+        UpdateTitle();
+    }
+
+    private void ClearDirty()
+    {
+        if (!_dirty) return;
+        _dirty = false;
+        UpdateTitle();
+    }
+
+    private void UpdateTitle()
+    {
+        Title = _dirty ? $"{BaseTitle} *" : BaseTitle;
+    }
+
+    // ---- Dashboard ----
+
+    private async Task StartDashboardTimer()
+    {
+        while (true)
+        {
+            await Task.Delay(2000);
+            CheckDmvopStatus();
+        }
+    }
+
+    private bool IsDmvopRunning()
+    {
+        return Process.GetProcessesByName("dmvop").Any(p => p.Id != Environment.ProcessId);
+    }
+
+    private void CheckDmvopStatus()
+    {
+        var running = IsDmvopRunning();
+        if (running == _dmvopRunning) return;
+        _dmvopRunning = running;
+        Dispatcher.UIThread.Post(() =>
+        {
+            UpdateDashboard();
+            if (!_dmvopRunning)
+            {
+                _dmvopProcess = null;
+                _dmvopOutput.Clear();
+                OutputArea.Text = "";
+            }
+        });
+    }
+
+    private void UpdateDashboard()
+    {
+        if (_dmvopRunning)
+        {
+            StatusLight.Fill = new SolidColorBrush(Colors.LimeGreen);
+            StatusTextRight.Text = "Running";
+            StatusTextRight.Foreground = new SolidColorBrush(Colors.LimeGreen);
+            ActionButton.Content = "Stop";
+        }
+        else
+        {
+            StatusLight.Fill = new SolidColorBrush(Colors.Red);
+            StatusTextRight.Text = "Stopped";
+            StatusTextRight.Foreground = new SolidColorBrush(Colors.Gray);
+            ActionButton.Content = "Start";
+        }
+    }
+
+    private void OnActionButton(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+        if (_dmvopRunning)
+        {
+            // Stop
+            try { _dmvopProcess?.Kill(); } catch { }
+            foreach (var proc in Process.GetProcessesByName("dmvop"))
+            {
+                if (proc.Id == Environment.ProcessId) continue;
+                try { proc.Kill(); } catch { }
+            }
+            _dmvopProcess = null;
+        }
+        else
+        {
+            // Start: launch from dmvop.exe directory, no window
+            var dmvopPath = Path.Combine(_configDir, "dmvop.exe");
+            if (!File.Exists(dmvopPath))
+            {
+                StatusLabel.Text = "Cannot find dmvop.exe";
+                return;
+            }
+
+            _dmvopOutput.Clear();
+            OutputArea.Text = "";
+
+            var psi = new ProcessStartInfo
+            {
+                FileName = dmvopPath,
+                Arguments = "--config=\"./dmvop-gui.toml\" --verbose",
+                WorkingDirectory = _configDir,
+                UseShellExecute = false,
+                CreateNoWindow = true,
+                RedirectStandardOutput = true,
+                RedirectStandardError = true,
+                StandardOutputEncoding = Encoding.UTF8,
+                StandardErrorEncoding = Encoding.UTF8,
+            };
+
+            try
+            {
+                var proc = Process.Start(psi);
+                if (proc == null)
+                {
+                    StatusLabel.Text = "Failed to start";
+                    return;
+                }
+                _dmvopProcess = proc;
+
+                // Read stdout and stderr in parallel
+                _ = ReadStreamAsync(proc.StandardOutput);
+                _ = ReadStreamAsync(proc.StandardError);
+
+                proc.Exited += (_, _) =>
+                {
+                    proc.WaitForExit();
+                    _dmvopRunning = false;
+                    Dispatcher.UIThread.Post(() =>
+                    {
+                        UpdateDashboard();
+                        // Don't clear output immediately so the user can see the last content
+                    });
+                };
+                proc.EnableRaisingEvents = true;
+            }
+            catch (Exception ex)
+            {
+                StatusLabel.Text = $"Failed to start: {ex.Message}";
+            }
+        }
+    }
+
+    private async Task ReadStreamAsync(StreamReader reader)
+    {
+        var buffer = new char[4096];
+        int charsRead;
+        while ((charsRead = await reader.ReadAsync(buffer, 0, buffer.Length)) > 0)
+        {
+            var segment = new string(buffer, 0, charsRead);
+            lock (_dmvopOutput)
+            {
+                _dmvopOutput.Append(segment);
+                // Limit max length to avoid memory blowup
+                if (_dmvopOutput.Length > 100_000)
+                    _dmvopOutput.Remove(0, _dmvopOutput.Length - 50_000);
+            }
+            Dispatcher.UIThread.Post(() =>
+            {
+                OutputArea.Text = _dmvopOutput.ToString();
+                // OutputScroll is the ScrollViewer x:Name? Use parent ScrollViewer
+                // Find the parent ScrollViewer of OutputArea directly
+                if (OutputArea.Parent is ScrollViewer sv)
+                    sv.ScrollToEnd();
+            });
+        }
+    }
+
+    private void OnClosing(object? sender, WindowClosingEventArgs e)
+    {
+        if (!_dirty || _promptingClose) return;
+
+        e.Cancel = true;
+        _promptingClose = true;
+
+        Dispatcher.UIThread.Post(async () =>
+        {
+            var result = await MessageBox.Show(this,
+                "There are unsaved changes. Do you want to save?", "DumbVoiceProtocol",
+                ("Save", MessageBoxResult.Yes),
+                ("Don't Save", MessageBoxResult.No),
+                ("Cancel", MessageBoxResult.Cancel));
+
+            _promptingClose = false;
+
+            switch (result)
+            {
+                case MessageBoxResult.Yes:
+                    OnSave();
+                    if (!_dirty)
+                        Close();
+                    break;
+                case MessageBoxResult.No:
+                    _dirty = false;
+                    Close();
+                    break;
+            }
+        });
+    }
+
+    private void LoadConfig()
+    {
+        _loading = true;
+
+        if (!File.Exists(_guiConfigPath))
+        {
+            if (File.Exists(_sourceToml))
+            {
+                File.Copy(_sourceToml, _guiConfigPath);
+            }
+            else
+            {
+                MessageBox.Show(this, "dmvop.toml does not exist", "Configuration Error",
+                    ("OK", MessageBoxResult.Ok));
+                StatusLabel.Text = "dmvop.toml does not exist";
+                return;
+            }
+        }
+
+        try
+        {
+            var text = File.ReadAllText(_guiConfigPath);
+            var model = Toml.ToModel(text);
+
+            DeviceBox.Text = GetString(model, "device") ?? "auto";
+            FormatBox.Text = GetString(model, "format") ?? "%{vol},%{word}";
+
+            var modelName = GetString(model, "model") ?? "base.en";
+            SelectComboBoxItem(ModelBox, modelName);
+
+            LangBox.Text = GetString(model, "lang") ?? "en";
+
+            if (model.TryGetValue("output", out var outputVal) && outputVal is TomlArray outputArray)
+            {
+                var modes = outputArray.OfType<string>().ToList();
+                StdoutCheck.IsChecked = modes.Contains("stdout");
+                TcpCheck.IsChecked = modes.Contains("tcp");
+                UdpCheck.IsChecked = modes.Contains("udp");
+                UdpBroadcastCheck.IsChecked = modes.Contains("udp-broadcast");
+                IpcCheck.IsChecked = modes.Contains("ipc");
+            }
+
+            if (model.TryGetValue("port", out var portVal) && portVal is long portLong)
+                PortBox.Text = portLong.ToString();
+
+            if (model.TryGetValue("instant", out var instantVal) && instantVal is bool instant)
+                InstantCheck.IsChecked = instant;
+
+            SubnetMaskBox.Text = GetString(model, "subnet_mask") ?? "255.255.255.0";
+            SocketFileBox.Text = GetString(model, "socket_file") ?? "./dmvop.sock";
+            ModelsDirBox.Text = GetString(model, "models_dir") ?? "";
+            PostBox.Text = GetString(model, "post") ?? "";
+
+            StatusLabel.Text = $"Loaded: {Path.GetFileName(_guiConfigPath)}";
+        }
+        catch (Exception ex)
+        {
+            StatusLabel.Text = $"Load error: {ex.Message}";
+        }
+        finally
+        {
+            _loading = false;
+            ClearDirty();
+        }
+    }
+
+    private void OnDownloadModel(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+        var modelName = GetComboBoxText(ModelBox);
+        if (string.IsNullOrEmpty(modelName))
+        {
+            StatusLabel.Text = "Please select a model first";
+            return;
+        }
+
+        var dmvopPath = Path.Combine(_configDir, "dmvop.exe");
+        if (!File.Exists(dmvopPath))
+        {
+            StatusLabel.Text = "Cannot find dmvop.exe";
+            return;
+        }
+
+        var procWin = new ProcessWindow(dmvopPath, $"--download-model={modelName}", _configDir);
+        procWin.ShowDialog(this);
     }
-}
\ No newline at end of file
+
+    private void OnKeyDown(object? sender, Avalonia.Input.KeyEventArgs e)
+    {
+        if (e.Key == Avalonia.Input.Key.S && e.KeyModifiers.HasFlag(Avalonia.Input.KeyModifiers.Control))
+        {
+            OnSave();
+        }
+    }
+
+    private void OnSave()
+    {
+        try
+        {
+            var model = new TomlTable();
+
+            model["device"] = DeviceBox.Text ?? "auto";
+            model["format"] = FormatBox.Text ?? "%{vol},%{word}";
+            model["model"] = GetComboBoxText(ModelBox) ?? "base.en";
+            model["lang"] = LangBox.Text ?? "en";
+
+            var outputArray = new TomlArray();
+            if (StdoutCheck.IsChecked == true) outputArray.Add("stdout");
+            if (TcpCheck.IsChecked == true) outputArray.Add("tcp");
+            if (UdpCheck.IsChecked == true) outputArray.Add("udp");
+            if (UdpBroadcastCheck.IsChecked == true) outputArray.Add("udp-broadcast");
+            if (IpcCheck.IsChecked == true) outputArray.Add("ipc");
+            model["output"] = outputArray;
+
+            if (int.TryParse(PortBox.Text, out var port))
+                model["port"] = port;
+
+            model["instant"] = InstantCheck.IsChecked == true;
+
+            model["subnet_mask"] = SubnetMaskBox.Text ?? "255.255.255.0";
+            model["socket_file"] = SocketFileBox.Text ?? "./dmvop.sock";
+
+            if (!string.IsNullOrWhiteSpace(ModelsDirBox.Text))
+                model["models_dir"] = ModelsDirBox.Text;
+
+            if (!string.IsNullOrWhiteSpace(PostBox.Text))
+                model["post"] = PostBox.Text;
+
+            var toml = Toml.FromModel(model);
+            var header = """
+                ## DMVOP Config File
+                ## Generated by DMVOP Manager
+                ##
+                ## Name this file `dmvop.toml` and place it in the working dir to be auto-detected!
+                ## DMVOP will auto-load this config file to avoid repeated CLI args
+
+                """;
+
+            File.WriteAllText(_guiConfigPath, header + toml);
+
+            StatusLabel.Text = $"Saved: {Path.GetFileName(_guiConfigPath)}";
+            ClearDirty();
+        }
+        catch (Exception ex)
+        {
+            StatusLabel.Text = $"Save error: {ex.Message}";
+        }
+    }
+
+    // ---- Helpers ----
+
+    private static string? GetString(TomlTable table, string key)
+        => table.TryGetValue(key, out var val) ? val?.ToString() : null;
+
+    private static void SelectComboBoxItem(ComboBox comboBox, string text)
+    {
+        for (var i = 0; i < comboBox.Items.Count; i++)
+        {
+            if (comboBox.Items[i] is ComboBoxItem cbi && cbi.Content?.ToString() == text)
+            {
+                comboBox.SelectedIndex = i;
+                return;
+            }
+        }
+    }
+
+    private static string? GetComboBoxText(ComboBox comboBox)
+        => comboBox.SelectedItem is ComboBoxItem cbi
+            ? cbi.Content?.ToString()
+            : null;
+}
diff --git a/manager/MessageBox.axaml b/manager/MessageBox.axaml
new file mode 100644
index 0000000..0ca35d4
--- /dev/null
+++ b/manager/MessageBox.axaml
@@ -0,0 +1,25 @@
+<Window
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d"
+    d:DesignWidth="400"
+    d:DesignHeight="150"
+    x:Class="manager.MessageBox"
+    Title="Prompt"
+    SizeToContent="WidthAndHeight"
+    WindowStartupLocation="CenterOwner"
+    CanResize="False"
+    ShowInTaskbar="False"
+>
+    <StackPanel Margin="20" Spacing="16">
+        <TextBlock x:Name="MessageText" Text="" FontSize="14" />
+        <StackPanel
+            x:Name="ButtonPanel"
+            Orientation="Horizontal"
+            HorizontalAlignment="Right"
+            Spacing="8"
+        />
+    </StackPanel>
+</Window>
diff --git a/manager/MessageBox.axaml.cs b/manager/MessageBox.axaml.cs
new file mode 100644
index 0000000..3a6868b
--- /dev/null
+++ b/manager/MessageBox.axaml.cs
@@ -0,0 +1,60 @@
+using System;
+using System.Threading.Tasks;
+using Avalonia;
+using Avalonia.Controls;
+
+namespace manager;
+
+public enum MessageBoxResult
+{
+    Ok,
+    Yes,
+    No,
+    Cancel,
+}
+
+public partial class MessageBox : Window
+{
+    public static readonly StyledProperty<string> TextProperty =
+        AvaloniaProperty.Register<MessageBox, string>(nameof(Text));
+
+    public string Text
+    {
+        get => GetValue(TextProperty);
+        set => SetValue(TextProperty, value);
+    }
+
+    public MessageBox()
+    {
+        InitializeComponent();
+    }
+
+    protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
+    {
+        base.OnPropertyChanged(change);
+        if (change.Property == TextProperty)
+            MessageText.Text = change.NewValue as string ?? "";
+    }
+
+    public void AddButtons(params (string text, MessageBoxResult result)[] buttons)
+    {
+        foreach (var (text, result) in buttons)
+        {
+            var btn = new Button { Content = text, Width = 80 };
+            btn.Click += (_, _) => Close(result);
+            ButtonPanel.Children.Add(btn);
+        }
+    }
+
+    public static Task<MessageBoxResult> Show(Window owner, string text, string title,
+        params (string text, MessageBoxResult result)[] buttons)
+    {
+        var msgBox = new MessageBox
+        {
+            Title = title,
+            Text = text,
+        };
+        msgBox.AddButtons(buttons);
+        return msgBox.ShowDialog<MessageBoxResult>(owner);
+    }
+}
diff --git a/manager/ProcessWindow.axaml b/manager/ProcessWindow.axaml
new file mode 100644
index 0000000..482397b
--- /dev/null
+++ b/manager/ProcessWindow.axaml
@@ -0,0 +1,43 @@
+<Window
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d"
+    d:DesignWidth="700"
+    d:DesignHeight="450"
+    x:Class="manager.ProcessWindow"
+    Title="Process"
+    Width="700"
+    Height="450"
+    WindowStartupLocation="CenterOwner"
+>
+    <Grid RowDefinitions="*,Auto" Margin="8">
+        <ScrollViewer
+            x:Name="OutputScroll"
+            Grid.Row="0"
+            Background="#1e1e1e"
+            Margin="0,0,0,8"
+        >
+            <TextBlock
+                x:Name="OutputText"
+                FontFamily="Consolas, Courier New, monospace"
+                FontSize="13"
+                Foreground="#d4d4d4"
+                Text=""
+                TextWrapping="Wrap"
+                Margin="8"
+            />
+        </ScrollViewer>
+
+        <StackPanel Grid.Row="1" Orientation="Horizontal" Spacing="12">
+            <TextBlock
+                x:Name="StatusText"
+                Text="Ready"
+                Foreground="#888"
+                VerticalAlignment="Center"
+            />
+            <Button x:Name="CloseButton" Content="Close" Width="80" />
+        </StackPanel>
+    </Grid>
+</Window>
diff --git a/manager/ProcessWindow.axaml.cs b/manager/ProcessWindow.axaml.cs
new file mode 100644
index 0000000..c11759c
--- /dev/null
+++ b/manager/ProcessWindow.axaml.cs
@@ -0,0 +1,104 @@
+using System;
+using System.Diagnostics;
+using System.Text;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Threading;
+
+namespace manager;
+
+public partial class ProcessWindow : Window
+{
+    private readonly Process _process = new();
+    private readonly StringBuilder _output = new();
+
+    public ProcessWindow()
+    {
+        InitializeComponent();
+    }
+
+    public ProcessWindow(string fileName, string? arguments = null, string? workingDir = null)
+        : this()
+    {
+        Title = $"{fileName} - Process Output";
+        CloseButton.Click += (_, _) => Close();
+
+        _process.StartInfo = new ProcessStartInfo
+        {
+            FileName = fileName,
+            Arguments = arguments ?? "",
+            WorkingDirectory = workingDir ?? "",
+            UseShellExecute = false,
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+            CreateNoWindow = true,
+            StandardOutputEncoding = Encoding.UTF8,
+            StandardErrorEncoding = Encoding.UTF8,
+        };
+
+        _process.EnableRaisingEvents = true;
+        _process.Exited += (_, _) =>
+        {
+            _process.WaitForExit();
+            Dispatcher.UIThread.Post(() =>
+            {
+                StatusText.Text = $"Exited (Code: {_process.ExitCode})";
+                AppendOutput($"[Process exited, code: {_process.ExitCode}]");
+            });
+        };
+
+        StartProcess();
+    }
+
+    private async void StartProcess()
+    {
+        try
+        {
+            StatusText.Text = "Starting...";
+            _process.Start();
+
+            StatusText.Text = $"Running (PID: {_process.Id})";
+
+            var stdoutTask = ReadStreamAsync(_process.StandardOutput);
+            var stderrTask = ReadStreamAsync(_process.StandardError);
+            await Task.WhenAll(stdoutTask, stderrTask);
+        }
+        catch (Exception ex)
+        {
+            Dispatcher.UIThread.Post(() =>
+            {
+                AppendOutput($"[Start failed] {ex.Message}");
+                StatusText.Text = "Start failed";
+            });
+        }
+    }
+
+    private async Task ReadStreamAsync(System.IO.StreamReader reader)
+    {
+        var buffer = new char[4096];
+        int charsRead;
+        while ((charsRead = await reader.ReadAsync(buffer, 0, buffer.Length)) > 0)
+        {
+            var segment = new string(buffer, 0, charsRead);
+            Dispatcher.UIThread.Post(() => AppendOutput(segment));
+        }
+    }
+
+    private void AppendOutput(string text)
+    {
+        _output.Append(text);
+        OutputText.Text = _output.ToString();
+
+        OutputScroll.ScrollToEnd();
+    }
+
+    protected override void OnClosed(EventArgs e)
+    {
+        base.OnClosed(e);
+        if (!_process.HasExited)
+        {
+            try { _process.Kill(); } catch { }
+        }
+        _process.Dispose();
+    }
+}
diff --git a/manager/Program.cs b/manager/Program.cs
index c2f6e74..fddd9fc 100644
--- a/manager/Program.cs
+++ b/manager/Program.cs
@@ -3,17 +3,13 @@ using System;
 
 namespace manager;
 
-class Program
+static class Program
 {
-    // Initialization code. Don't use any Avalonia, third-party APIs or any
-    // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
-    // yet and stuff might break.
     [STAThread]
     public static void Main(string[] args) => BuildAvaloniaApp()
         .StartWithClassicDesktopLifetime(args);
 
-    // Avalonia configuration, don't remove; also used by visual designer.
-    public static AppBuilder BuildAvaloniaApp()
+    private static AppBuilder BuildAvaloniaApp()
         => AppBuilder.Configure<App>()
             .UsePlatformDetect()
             .WithInterFont()
diff --git a/manager/manager.csproj b/manager/manager.csproj
index e21a361..753edc8 100644
--- a/manager/manager.csproj
+++ b/manager/manager.csproj
@@ -5,18 +5,28 @@
     <Nullable>enable</Nullable>
     <BuiltInComInteropSupport>true</BuiltInComInteropSupport>
     <ApplicationManifest>app.manifest</ApplicationManifest>
-    <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
+    <AvaloniaUseCompiledBindingsByDefault
+        >true</AvaloniaUseCompiledBindingsByDefault>
   </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="Avalonia" Version="11.3.2" />
     <PackageReference Include="Avalonia.Desktop" Version="11.3.2" />
-    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.2" />
+    <PackageReference Include="Avalonia.Themes.Simple" Version="11.3.2" />
     <PackageReference Include="Avalonia.Fonts.Inter" Version="11.3.2" />
     <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
     <PackageReference Include="Avalonia.Diagnostics" Version="11.3.2">
-      <IncludeAssets Condition="'$(Configuration)' != 'Debug'">None</IncludeAssets>
-      <PrivateAssets Condition="'$(Configuration)' != 'Debug'">All</PrivateAssets>
+      <IncludeAssets
+                Condition="'$(Configuration)' != 'Debug'"
+            >None</IncludeAssets>
+      <PrivateAssets
+                Condition="'$(Configuration)' != 'Debug'"
+            >All</PrivateAssets>
     </PackageReference>
   </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Tomlyn" Version="0.17.0" />
+  </ItemGroup>
+
 </Project>