feat(01-07): add ProfileManagementDialog with DI factory wiring

- Create Views/Dialogs/ProfileManagementDialog.xaml (modal Window with Name/TenantUrl/ClientId fields and TranslationSource bindings)
- Create Views/Dialogs/ProfileManagementDialog.xaml.cs (DI constructor injection, LoadAsync on Loaded)
- Add OpenProfileManagementDialog factory delegate to MainWindowViewModel
- Wire ManageProfilesCommand to open dialog via factory, reload profiles after close
- Register ProfileManagementDialog as Transient in DI (App.xaml.cs)
- Inject IServiceProvider into MainWindow constructor for DI-resolved dialog factory

SharepointToolbox/App.xaml.cs

@@ -8,6 +8,8 @@ using SharepointToolbox.Infrastructure.Logging;
 using SharepointToolbox.Services;
 using SharepointToolbox.ViewModels;
 using SharepointToolbox.ViewModels.Tabs;
+using SharepointToolbox.Views.Dialogs;
+using SharepointToolbox.Views.Tabs;
 using System.Windows;
 
 namespace SharepointToolbox;
@@ -74,6 +76,8 @@ public partial class App : Application
         services.AddSingleton<MainWindowViewModel>();
         services.AddTransient<ProfileManagementViewModel>();
         services.AddTransient<SettingsViewModel>();
+        services.AddTransient<ProfileManagementDialog>();
+        services.AddTransient<SettingsView>();
         services.AddSingleton<MainWindow>();
     }
 }