chore: archive v1.1 Enhanced Reports milestone

v1.1 shipped with 4 phases (25 plans), 10/10 requirements complete:
- Global site selection (toolbar picker, all tabs consume)
- User access audit (Graph people-picker, direct/group/inherited)
- Simplified permissions (plain-language labels, risk levels, detail toggle)
- Storage visualization (LiveCharts2 pie/donut + bar charts)

Post-phase polish: centralized site selection (removed per-tab pickers),
claims prefix stripping, StorageMetrics backfill, chart tooltip fix,
summary stats in app + HTML exports.

205 tests passing, 10,484 LOC.

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

SharepointToolbox/Views/Tabs/PermissionsView.xaml.cs

@@ -1,8 +1,6 @@
 using System.Windows.Controls;
 using Microsoft.Extensions.DependencyInjection;
-using SharepointToolbox.Core.Models;
 using SharepointToolbox.ViewModels.Tabs;
-using SharepointToolbox.Views.Dialogs;
 
 namespace SharepointToolbox.Views.Tabs;
 
@@ -11,12 +9,6 @@ public partial class PermissionsView : UserControl
     public PermissionsView(IServiceProvider serviceProvider)
     {
         InitializeComponent();
-        var vm = serviceProvider.GetRequiredService<PermissionsViewModel>();
-        DataContext = vm;
-        vm.OpenSitePickerDialog = () =>
-        {
-            var factory = serviceProvider.GetRequiredService<Func<TenantProfile, SitePickerDialog>>();
-            return factory(vm.CurrentProfile ?? new TenantProfile());
-        };
+        DataContext = serviceProvider.GetRequiredService<PermissionsViewModel>();
     }
 }