feat(installer): add UninstallRunner (service + shortcuts + dirs)

src/ClaudeDo.Installer/App.xaml.cs

@@ -121,6 +121,9 @@ public partial class App : Application
         sc.AddSingleton<StopServiceStep>();
         sc.AddSingleton<StartServiceStep>();
 
+        // Runners
+        sc.AddSingleton<UninstallRunner>();
+
         // ViewModels
         sc.AddSingleton<WizardViewModel>();
         sc.AddSingleton<SettingsViewModel>();

src/ClaudeDo.Installer/Core/UninstallRunner.cs

@@ -0,0 +1,68 @@
+using System.IO;
+using ClaudeDo.Data;
+using ClaudeDo.Installer.Steps;
+
+namespace ClaudeDo.Installer.Core;
+
+public sealed class UninstallRunner
+{
+    private readonly InstallContext _context;
+    private readonly StopServiceStep _stopService;
+
+    public UninstallRunner(InstallContext context, StopServiceStep stopService)
+    {
+        _context = context;
+        _stopService = stopService;
+    }
+
+    public async Task<StepResult> RunAsync(IProgress<string> progress, CancellationToken ct)
+    {
+        // 1) Stop + delete service.
+        progress.Report("Stopping worker service...");
+        var stopResult = await _stopService.ExecuteAsync(_context, progress, ct);
+        if (!stopResult.Success)
+        {
+            progress.Report($"(Ignored) {stopResult.ErrorMessage}");
+        }
+
+        progress.Report("Unregistering service...");
+        await ProcessRunner.RunAsync("sc.exe", $"delete {StopServiceStep.ServiceName}", null, progress, ct);
+
+        // 2) Remove shortcuts.
+        progress.Report("Removing shortcuts...");
+        TryDeleteFile(Path.Combine(
+            Environment.GetFolderPath(Environment.SpecialFolder.CommonDesktopDirectory),
+            "ClaudeDo.lnk"));
+        TryDeleteFile(Path.Combine(
+            Environment.GetFolderPath(Environment.SpecialFolder.CommonStartMenu),
+            "Programs", "ClaudeDo.lnk"));
+
+        // 3) Delete install directory.
+        if (Directory.Exists(_context.InstallDirectory))
+        {
+            progress.Report($"Deleting {_context.InstallDirectory}...");
+            TryDeleteDir(_context.InstallDirectory);
+        }
+
+        // 4) Delete ~/.todo-app (config + DB + logs) — user opted into full removal.
+        var appData = Paths.AppDataRoot();
+        if (Directory.Exists(appData))
+        {
+            progress.Report($"Deleting {appData}...");
+            TryDeleteDir(appData);
+        }
+
+        progress.Report("Uninstall complete.");
+        return StepResult.Ok();
+    }
+
+    private static void TryDeleteFile(string path)
+    {
+        try { if (File.Exists(path)) File.Delete(path); } catch { /* best effort */ }
+    }
+
+    private static void TryDeleteDir(string path)
+    {
+        try { Directory.Delete(path, recursive: true); } catch { /* best effort */ }
+    }
+}