feat(11-03): inject IBrandingService into all 5 export ViewModels and assemble branding in ExportHtmlAsync

- Add IBrandingService field and DI constructor parameter to all 5 ViewModels
- Add optional IBrandingService? parameter to test constructors (PermissionsViewModel, StorageViewModel, UserAccessAuditViewModel)
- Assemble ReportBranding from GetMspLogoAsync + _currentProfile.ClientLogo before each WriteAsync call
- Pass branding as last parameter to WriteAsync in all ExportHtmlAsync methods
- Guard clause: branding assembly skipped (branding = null) when _brandingService is null (test constructors)
- Build: 0 warnings, 0 errors; tests: 254 passed / 0 failed / 26 skipped

SharepointToolbox/ViewModels/Tabs/DuplicatesViewModel.cs

@@ -31,6 +31,7 @@ public partial class DuplicatesViewModel : FeatureViewModelBase
     private readonly IDuplicatesService _duplicatesService;
     private readonly ISessionManager _sessionManager;
     private readonly DuplicatesHtmlExportService _htmlExportService;
+    private readonly IBrandingService _brandingService;
     private readonly ILogger<FeatureViewModelBase> _logger;
     private TenantProfile? _currentProfile;
     private IReadOnlyList<DuplicateGroup> _lastGroups = Array.Empty<DuplicateGroup>();
@@ -64,12 +65,14 @@ public partial class DuplicatesViewModel : FeatureViewModelBase
         IDuplicatesService duplicatesService,
         ISessionManager sessionManager,
         DuplicatesHtmlExportService htmlExportService,
+        IBrandingService brandingService,
         ILogger<FeatureViewModelBase> logger)
         : base(logger)
     {
         _duplicatesService = duplicatesService;
         _sessionManager    = sessionManager;
         _htmlExportService = htmlExportService;
+        _brandingService   = brandingService;
         _logger            = logger;
 
         ExportHtmlCommand = new AsyncRelayCommand(ExportHtmlAsync, CanExport);
@@ -168,7 +171,15 @@ public partial class DuplicatesViewModel : FeatureViewModelBase
         if (dialog.ShowDialog() != true) return;
         try
         {
-            await _htmlExportService.WriteAsync(_lastGroups, dialog.FileName, CancellationToken.None);
+            ReportBranding? branding = null;
+            if (_brandingService is not null)
+            {
+                var mspLogo = await _brandingService.GetMspLogoAsync();
+                var clientLogo = _currentProfile?.ClientLogo;
+                branding = new ReportBranding(mspLogo, clientLogo);
+            }
+
+            await _htmlExportService.WriteAsync(_lastGroups, dialog.FileName, CancellationToken.None, branding);
             Process.Start(new ProcessStartInfo(dialog.FileName) { UseShellExecute = true });
         }
         catch (Exception ex) { StatusMessage = $"Export failed: {ex.Message}"; _logger.LogError(ex, "HTML export failed."); }

SharepointToolbox/ViewModels/Tabs/PermissionsViewModel.cs

@@ -26,6 +26,7 @@ public partial class PermissionsViewModel : FeatureViewModelBase
     private readonly ISessionManager _sessionManager;
     private readonly CsvExportService? _csvExportService;
     private readonly HtmlExportService? _htmlExportService;
+    private readonly IBrandingService? _brandingService;
     private readonly ILogger<FeatureViewModelBase> _logger;
 
     // ── Observable properties ───────────────────────────────────────────────
@@ -128,6 +129,7 @@ public partial class PermissionsViewModel : FeatureViewModelBase
         ISessionManager sessionManager,
         CsvExportService csvExportService,
         HtmlExportService htmlExportService,
+        IBrandingService brandingService,
         ILogger<FeatureViewModelBase> logger)
         : base(logger)
     {
@@ -136,6 +138,7 @@ public partial class PermissionsViewModel : FeatureViewModelBase
         _sessionManager = sessionManager;
         _csvExportService = csvExportService;
         _htmlExportService = htmlExportService;
+        _brandingService = brandingService;
         _logger = logger;
 
         ExportCsvCommand = new AsyncRelayCommand(ExportCsvAsync, CanExport);
@@ -149,7 +152,8 @@ public partial class PermissionsViewModel : FeatureViewModelBase
         IPermissionsService permissionsService,
         ISiteListService siteListService,
         ISessionManager sessionManager,
-        ILogger<FeatureViewModelBase> logger)
+        ILogger<FeatureViewModelBase> logger,
+        IBrandingService? brandingService = null)
         : base(logger)
     {
         _permissionsService = permissionsService;
@@ -157,6 +161,7 @@ public partial class PermissionsViewModel : FeatureViewModelBase
         _sessionManager = sessionManager;
         _csvExportService = null;
         _htmlExportService = null;
+        _brandingService = brandingService;
         _logger = logger;
 
         ExportCsvCommand = new AsyncRelayCommand(ExportCsvAsync, CanExport);
@@ -313,10 +318,18 @@ public partial class PermissionsViewModel : FeatureViewModelBase
         if (dialog.ShowDialog() != true) return;
         try
         {
+            ReportBranding? branding = null;
+            if (_brandingService is not null)
+            {
+                var mspLogo = await _brandingService.GetMspLogoAsync();
+                var clientLogo = _currentProfile?.ClientLogo;
+                branding = new ReportBranding(mspLogo, clientLogo);
+            }
+
             if (IsSimplifiedMode && SimplifiedResults.Count > 0)
-                await _htmlExportService.WriteAsync(SimplifiedResults.ToList(), dialog.FileName, CancellationToken.None);
+                await _htmlExportService.WriteAsync(SimplifiedResults.ToList(), dialog.FileName, CancellationToken.None, branding);
             else
-                await _htmlExportService.WriteAsync(Results, dialog.FileName, CancellationToken.None);
+                await _htmlExportService.WriteAsync(Results, dialog.FileName, CancellationToken.None, branding);
             OpenFile(dialog.FileName);
         }
         catch (Exception ex)

SharepointToolbox/ViewModels/Tabs/SearchViewModel.cs

@@ -17,6 +17,7 @@ public partial class SearchViewModel : FeatureViewModelBase
     private readonly ISessionManager _sessionManager;
     private readonly SearchCsvExportService _csvExportService;
     private readonly SearchHtmlExportService _htmlExportService;
+    private readonly IBrandingService _brandingService;
     private readonly ILogger<FeatureViewModelBase> _logger;
     private TenantProfile? _currentProfile;
 
@@ -59,6 +60,7 @@ public partial class SearchViewModel : FeatureViewModelBase
         ISessionManager sessionManager,
         SearchCsvExportService csvExportService,
         SearchHtmlExportService htmlExportService,
+        IBrandingService brandingService,
         ILogger<FeatureViewModelBase> logger)
         : base(logger)
     {
@@ -66,6 +68,7 @@ public partial class SearchViewModel : FeatureViewModelBase
         _sessionManager   = sessionManager;
         _csvExportService = csvExportService;
         _htmlExportService = htmlExportService;
+        _brandingService  = brandingService;
         _logger           = logger;
 
         ExportCsvCommand  = new AsyncRelayCommand(ExportCsvAsync,  CanExport);
@@ -168,7 +171,15 @@ public partial class SearchViewModel : FeatureViewModelBase
         if (dialog.ShowDialog() != true) return;
         try
         {
-            await _htmlExportService.WriteAsync(Results, dialog.FileName, CancellationToken.None);
+            ReportBranding? branding = null;
+            if (_brandingService is not null)
+            {
+                var mspLogo = await _brandingService.GetMspLogoAsync();
+                var clientLogo = _currentProfile?.ClientLogo;
+                branding = new ReportBranding(mspLogo, clientLogo);
+            }
+
+            await _htmlExportService.WriteAsync(Results, dialog.FileName, CancellationToken.None, branding);
             OpenFile(dialog.FileName);
         }
         catch (Exception ex) { StatusMessage = $"Export failed: {ex.Message}"; _logger.LogError(ex, "HTML export failed."); }

SharepointToolbox/ViewModels/Tabs/StorageViewModel.cs

@@ -21,6 +21,7 @@ public partial class StorageViewModel : FeatureViewModelBase
     private readonly ISessionManager _sessionManager;
     private readonly StorageCsvExportService _csvExportService;
     private readonly StorageHtmlExportService _htmlExportService;
+    private readonly IBrandingService? _brandingService;
     private readonly ILogger<FeatureViewModelBase> _logger;
     private TenantProfile? _currentProfile;
 
@@ -134,6 +135,7 @@ public partial class StorageViewModel : FeatureViewModelBase
         ISessionManager sessionManager,
         StorageCsvExportService csvExportService,
         StorageHtmlExportService htmlExportService,
+        IBrandingService brandingService,
         ILogger<FeatureViewModelBase> logger)
         : base(logger)
     {
@@ -141,6 +143,7 @@ public partial class StorageViewModel : FeatureViewModelBase
         _sessionManager    = sessionManager;
         _csvExportService  = csvExportService;
         _htmlExportService = htmlExportService;
+        _brandingService   = brandingService;
         _logger            = logger;
 
         ExportCsvCommand  = new AsyncRelayCommand(ExportCsvAsync,  CanExport);
@@ -151,13 +154,15 @@ public partial class StorageViewModel : FeatureViewModelBase
     internal StorageViewModel(
         IStorageService storageService,
         ISessionManager sessionManager,
-        ILogger<FeatureViewModelBase> logger)
+        ILogger<FeatureViewModelBase> logger,
+        IBrandingService? brandingService = null)
         : base(logger)
     {
         _storageService    = storageService;
         _sessionManager    = sessionManager;
         _csvExportService  = null!;
         _htmlExportService = null!;
+        _brandingService   = brandingService;
         _logger            = logger;
 
         ExportCsvCommand  = new AsyncRelayCommand(ExportCsvAsync,  CanExport);
@@ -296,7 +301,15 @@ public partial class StorageViewModel : FeatureViewModelBase
         if (dialog.ShowDialog() != true) return;
         try
         {
-            await _htmlExportService.WriteAsync(Results, FileTypeMetrics, dialog.FileName, CancellationToken.None);
+            ReportBranding? branding = null;
+            if (_brandingService is not null)
+            {
+                var mspLogo = await _brandingService.GetMspLogoAsync();
+                var clientLogo = _currentProfile?.ClientLogo;
+                branding = new ReportBranding(mspLogo, clientLogo);
+            }
+
+            await _htmlExportService.WriteAsync(Results, FileTypeMetrics, dialog.FileName, CancellationToken.None, branding);
             OpenFile(dialog.FileName);
         }
         catch (Exception ex)

SharepointToolbox/ViewModels/Tabs/UserAccessAuditViewModel.cs

@@ -25,6 +25,7 @@ public partial class UserAccessAuditViewModel : FeatureViewModelBase
     private readonly ISessionManager _sessionManager;
     private readonly UserAccessCsvExportService? _csvExportService;
     private readonly UserAccessHtmlExportService? _htmlExportService;
+    private readonly IBrandingService? _brandingService;
     private readonly ILogger<FeatureViewModelBase> _logger;
 
     // ── People picker debounce ──────────────────────────────────────────────
@@ -118,6 +119,7 @@ public partial class UserAccessAuditViewModel : FeatureViewModelBase
         ISessionManager sessionManager,
         UserAccessCsvExportService csvExportService,
         UserAccessHtmlExportService htmlExportService,
+        IBrandingService brandingService,
         ILogger<FeatureViewModelBase> logger)
         : base(logger)
     {
@@ -126,6 +128,7 @@ public partial class UserAccessAuditViewModel : FeatureViewModelBase
         _sessionManager = sessionManager;
         _csvExportService = csvExportService;
         _htmlExportService = htmlExportService;
+        _brandingService = brandingService;
         _logger = logger;
 
         ExportCsvCommand = new AsyncRelayCommand(ExportCsvAsync, CanExport);
@@ -145,7 +148,8 @@ public partial class UserAccessAuditViewModel : FeatureViewModelBase
         IUserAccessAuditService auditService,
         IGraphUserSearchService graphUserSearchService,
         ISessionManager sessionManager,
-        ILogger<FeatureViewModelBase> logger)
+        ILogger<FeatureViewModelBase> logger,
+        IBrandingService? brandingService = null)
         : base(logger)
     {
         _auditService = auditService;
@@ -153,6 +157,7 @@ public partial class UserAccessAuditViewModel : FeatureViewModelBase
         _sessionManager = sessionManager;
         _csvExportService = null;
         _htmlExportService = null;
+        _brandingService = brandingService;
         _logger = logger;
 
         ExportCsvCommand = new AsyncRelayCommand(ExportCsvAsync, CanExport);
@@ -329,7 +334,15 @@ public partial class UserAccessAuditViewModel : FeatureViewModelBase
         if (dialog.ShowDialog() != true) return;
         try
         {
-            await _htmlExportService.WriteAsync(Results, dialog.FileName, CancellationToken.None);
+            ReportBranding? branding = null;
+            if (_brandingService is not null)
+            {
+                var mspLogo = await _brandingService.GetMspLogoAsync();
+                var clientLogo = _currentProfile?.ClientLogo;
+                branding = new ReportBranding(mspLogo, clientLogo);
+            }
+
+            await _htmlExportService.WriteAsync(Results, dialog.FileName, CancellationToken.None, branding);
             OpenFile(dialog.FileName);
         }
         catch (Exception ex)