feat: expose legacy launcher configuration workflow

Launcher.Next.App/MainWindow.xaml

@@ -1 +1 @@
-<Window x:Class="Launcher.Next.App.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Launcher Next (Foundation)" Height="300" Width="540"><StackPanel Margin="20"><TextBlock FontSize="20" Text="Launcher Next — foundation"/><TextBlock Margin="0,12,0,0" Text="Plant 3D: discovery available in diagnostics"/><TextBlock Text="Mode: Legacy (default); NextPilot requires explicit configuration"/><TextBlock Text="Package: no production catalog connected"/><Button Margin="0,16,0,0" IsEnabled="False" Content="Launch (disabled: dry-run foundation)"/></StackPanel></Window>
+<Window x:Class="Launcher.Next.App.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Launcher Next" Height="560" Width="780"><Grid Margin="20"><Grid.RowDefinitions><RowDefinition Height="Auto"/><RowDefinition Height="Auto"/><RowDefinition Height="*"/><RowDefinition Height="Auto"/></Grid.RowDefinitions><TextBlock FontSize="22" FontWeight="SemiBold" Text="Launcher Next — Plant 3D 2026"/><Grid Grid.Row="1" Margin="0,18,0,10"><Grid.ColumnDefinitions><ColumnDefinition Width="*"/><ColumnDefinition Width="*"/></Grid.ColumnDefinitions><GroupBox Header="Autodesk"><StackPanel Margin="8"><TextBlock x:Name="AutodeskStatus"/><TextBlock x:Name="ExecutableStatus" TextWrapping="Wrap"/><Button Margin="0,8,0,0" Content="Refresh" Click="Refresh_Click"/></StackPanel></GroupBox><GroupBox Grid.Column="1" Header="Configuration" Margin="12,0,0,0"><StackPanel Margin="8"><TextBlock x:Name="ConfigurationStatus" Text="Configuration not selected"/><Button Margin="0,8,0,0" Content="Open legacy Settings.xml" Click="OpenSettings_Click"/></StackPanel></GroupBox></Grid><Grid Grid.Row="2"><Grid.ColumnDefinitions><ColumnDefinition Width="*"/><ColumnDefinition Width="*"/></Grid.ColumnDefinitions><GroupBox Header="Available configurations"><ListBox x:Name="Patterns" Margin="8" DisplayMemberPath="Name" SelectionChanged="Patterns_SelectionChanged"/></GroupBox><GroupBox Grid.Column="1" Header="Selected configuration" Margin="12,0,0,0"><StackPanel Margin="8"><TextBlock x:Name="PatternDetails" TextWrapping="Wrap"/><TextBlock Margin="0,12,0,0" Text="Packages" FontWeight="SemiBold"/><TextBlock x:Name="PackageStatus" Text="Package preparation required" TextWrapping="Wrap"/></StackPanel></GroupBox></Grid><StackPanel Grid.Row="3" Margin="0,14,0,0"><WrapPanel><Button x:Name="PrepareButton" Content="Prepare / Install / Update" IsEnabled="False" Margin="0,0,8,0"/><Button x:Name="LaunchButton" Content="Launch Plant 3D" IsEnabled="False"/><Button Content="Diagnostics" Margin="8,0,0,0" Click="Diagnostics_Click"/></WrapPanel><TextBlock x:Name="Status" Margin="0,10,0,0" TextWrapping="Wrap"/></StackPanel></Grid></Window>

Launcher.Next.App/MainWindow.xaml.cs

@@ -1 +1,26 @@
-namespace Launcher.Next.App; public partial class MainWindow : System.Windows.Window { public MainWindow() => InitializeComponent(); }
+using Launcher.Next.Application;
+using Launcher.Next.Autodesk;
+
+namespace Launcher.Next.App;
+public partial class MainWindow : System.Windows.Window
+{
+    private readonly LegacyConfigurationAdapter adapter=new();
+    public MainWindow() { InitializeComponent(); RefreshDiscovery(); Status.Text="Ready: choose a legacy Settings.xml to inspect approved configurations."; }
+    private void RefreshDiscovery()
+    {
+        var product=new PlantProductDiscovery(new WindowsRegistryReader()).DiscoverPlant3D(2026);
+        AutodeskStatus.Text=product is null?"Autodesk Plant 3D 2026: Not found":"Autodesk Plant 3D 2026: Found";
+        ExecutableStatus.Text=product is null?"Discovery diagnostic: ACAD-9117 Plant 3D registry entry or executable unavailable.":$"Executable: {product.ExecutablePath}";
+    }
+    private void Refresh_Click(object sender,System.Windows.RoutedEventArgs e)=>RefreshDiscovery();
+    private void OpenSettings_Click(object sender,System.Windows.RoutedEventArgs e)
+    {
+        var dialog=new Microsoft.Win32.OpenFileDialog { Filter="Settings.xml|Settings.xml|XML files|*.xml" };
+        if(dialog.ShowDialog()!=true)return;
+        try { var settings=adapter.ParseSettings(System.IO.File.ReadAllText(dialog.FileName)); Patterns.ItemsSource=settings.Patterns; ConfigurationStatus.Text=$"Loaded {settings.Patterns.Count} configuration(s) from {System.IO.Path.GetFileName(dialog.FileName)}"; Status.Text="Select a configuration. Exact package preparation remains blocked until an approved compatibility overlay and local verified catalog are supplied."; }
+        catch(System.Exception ex) { ConfigurationStatus.Text="Configuration invalid";Status.Text=$"Blocked: {ex.Message}";Patterns.ItemsSource=null; }
+    }
+    private void Patterns_SelectionChanged(object sender,System.Windows.Controls.SelectionChangedEventArgs e)
+    { if(Patterns.SelectedItem is not LegacyProductPattern pattern)return;PatternDetails.Text=$"Filter: {pattern.Filter}\nRoster: {pattern.Roster}\nLegacy plugins: {pattern.Plugins.Count}";PackageStatus.Text="Exact package requirements are derived only after approved overlay + ordered download_list.xml join.";Status.Text="Configuration selected; provide approved local compatibility inputs to prepare packages."; }
+    private void Diagnostics_Click(object sender,System.Windows.RoutedEventArgs e)=>System.Windows.MessageBox.Show($"{AutodeskStatus.Text}\n{ConfigurationStatus.Text}\n{Status.Text}","Launcher Next diagnostics");
+}