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/MainWindow.xaml.cs

@@ -48,18 +48,7 @@ public partial class MainWindow : Window
         TemplatesTabItem.Content = serviceProvider.GetRequiredService<TemplatesView>();
 
         // Phase 7: User Access Audit
-        var auditView = serviceProvider.GetRequiredService<UserAccessAuditView>();
-        UserAccessAuditTabItem.Content = auditView;
-
-        // Wire site picker dialog factory for audit tab (same pattern as PermissionsView)
-        if (auditView.DataContext is ViewModels.Tabs.UserAccessAuditViewModel auditVm)
-        {
-            auditVm.OpenSitePickerDialog = () =>
-            {
-                var factory = serviceProvider.GetRequiredService<Func<TenantProfile, SitePickerDialog>>();
-                return factory(auditVm.CurrentProfile ?? new TenantProfile());
-            };
-        }
+        UserAccessAuditTabItem.Content = serviceProvider.GetRequiredService<UserAccessAuditView>();
 
         // Replace Settings tab placeholder with the DI-resolved SettingsView
         SettingsTabItem.Content = serviceProvider.GetRequiredService<SettingsView>();