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/ViewModels/Tabs/DuplicatesViewModel.cs

@@ -33,10 +33,8 @@ public partial class DuplicatesViewModel : FeatureViewModelBase
     private readonly DuplicatesHtmlExportService _htmlExportService;
     private readonly ILogger<FeatureViewModelBase> _logger;
     private TenantProfile? _currentProfile;
-    private bool _hasLocalSiteOverride;
     private IReadOnlyList<DuplicateGroup> _lastGroups = Array.Empty<DuplicateGroup>();
 
-    [ObservableProperty] private string _siteUrl = string.Empty;
     [ObservableProperty] private bool _modeFiles = true;
     [ObservableProperty] private bool _modeFolders;
     [ObservableProperty] private bool _matchSize = true;
@@ -77,26 +75,6 @@ public partial class DuplicatesViewModel : FeatureViewModelBase
         ExportHtmlCommand = new AsyncRelayCommand(ExportHtmlAsync, CanExport);
     }
 
-    protected override void OnGlobalSitesChanged(IReadOnlyList<SiteInfo> sites)
-    {
-        if (_hasLocalSiteOverride) return;
-        SiteUrl = sites.Count > 0 ? sites[0].Url : string.Empty;
-    }
-
-    partial void OnSiteUrlChanged(string value)
-    {
-        if (string.IsNullOrWhiteSpace(value))
-        {
-            _hasLocalSiteOverride = false;
-            if (GlobalSites.Count > 0)
-                SiteUrl = GlobalSites[0].Url;
-        }
-        else if (GlobalSites.Count == 0 || value != GlobalSites[0].Url)
-        {
-            _hasLocalSiteOverride = true;
-        }
-    }
-
     protected override async Task RunOperationAsync(CancellationToken ct, IProgress<OperationProgress> progress)
     {
         if (_currentProfile == null)
@@ -104,36 +82,45 @@ public partial class DuplicatesViewModel : FeatureViewModelBase
             StatusMessage = "No tenant selected. Please connect to a tenant first.";
             return;
         }
-        if (string.IsNullOrWhiteSpace(SiteUrl))
+
+        var urls = GlobalSites.Select(s => s.Url).Where(u => !string.IsNullOrWhiteSpace(u)).ToList();
+        if (urls.Count == 0)
         {
-            StatusMessage = "Please enter a site URL.";
+            StatusMessage = "Select at least one site from the toolbar.";
             return;
         }
 
-        var siteProfile = new TenantProfile
+        var allGroups = new List<DuplicateGroup>();
+
+        foreach (var url in urls)
         {
-            TenantUrl = SiteUrl.TrimEnd('/'),
-            ClientId  = _currentProfile.ClientId,
-            Name      = _currentProfile.Name
-        };
-        var ctx = await _sessionManager.GetOrCreateContextAsync(siteProfile, ct);
+            var siteProfile = new TenantProfile
+            {
+                TenantUrl = url.TrimEnd('/'),
+                ClientId  = _currentProfile.ClientId,
+                Name      = _currentProfile.Name
+            };
+            var ctx = await _sessionManager.GetOrCreateContextAsync(siteProfile, ct);
 
-        var opts = new DuplicateScanOptions(
-            Mode:               ModeFiles ? "Files" : "Folders",
-            MatchSize:          MatchSize,
-            MatchCreated:       MatchCreated,
-            MatchModified:      MatchModified,
-            MatchSubfolderCount: MatchSubfolders,
-            MatchFileCount:     MatchFileCount,
-            IncludeSubsites:    IncludeSubsites,
-            Library:            string.IsNullOrWhiteSpace(Library) ? null : Library
-        );
+            var opts = new DuplicateScanOptions(
+                Mode:               ModeFiles ? "Files" : "Folders",
+                MatchSize:          MatchSize,
+                MatchCreated:       MatchCreated,
+                MatchModified:      MatchModified,
+                MatchSubfolderCount: MatchSubfolders,
+                MatchFileCount:     MatchFileCount,
+                IncludeSubsites:    IncludeSubsites,
+                Library:            string.IsNullOrWhiteSpace(Library) ? null : Library
+            );
 
-        var groups = await _duplicatesService.ScanDuplicatesAsync(ctx, opts, progress, ct);
-        _lastGroups = groups;
+            var groups = await _duplicatesService.ScanDuplicatesAsync(ctx, opts, progress, ct);
+            allGroups.AddRange(groups);
+        }
+
+        _lastGroups = allGroups;
 
         // Flatten groups to display rows
-        var rows = groups
+        var rows = allGroups
             .SelectMany(g => g.Items.Select(item => new DuplicateRow
             {
                 GroupName   = g.Name,
@@ -158,10 +145,8 @@ public partial class DuplicatesViewModel : FeatureViewModelBase
     protected override void OnTenantSwitched(Core.Models.TenantProfile profile)
     {
         _currentProfile = profile;
-        _hasLocalSiteOverride = false;
         Results = new ObservableCollection<DuplicateRow>();
         _lastGroups = Array.Empty<DuplicateGroup>();
-        SiteUrl = string.Empty;
         OnPropertyChanged(nameof(CurrentProfile));
         ExportHtmlCommand.NotifyCanExecuteChanged();
     }