fix(07): fix people picker selection and audit service authentication

People picker ListBox used MouseBinding which fires before SelectedItem
updates, causing null CommandParameter. Replaced with SelectionChanged
event handler in code-behind.

AuditUsersAsync created TenantProfile with empty ClientId, causing
ArgumentException in SessionManager. Added currentProfile parameter
to pass the authenticated tenant's ClientId through.

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

SharepointToolbox/Services/IUserAccessAuditService.cs

@@ -22,6 +22,7 @@ public interface IUserAccessAuditService
     /// <returns>Flat list of access entries for the target users.</returns>
     Task<IReadOnlyList<UserAccessEntry>> AuditUsersAsync(
         ISessionManager sessionManager,
+        TenantProfile currentProfile,
         IReadOnlyList<string> targetUserLogins,
         IReadOnlyList<SiteInfo> sites,
         ScanOptions options,

SharepointToolbox/Services/UserAccessAuditService.cs

@@ -24,6 +24,7 @@ public class UserAccessAuditService : IUserAccessAuditService
 
     public async Task<IReadOnlyList<UserAccessEntry>> AuditUsersAsync(
         ISessionManager sessionManager,
+        TenantProfile currentProfile,
         IReadOnlyList<string> targetUserLogins,
         IReadOnlyList<SiteInfo> sites,
         ScanOptions options,
@@ -53,7 +54,7 @@ public class UserAccessAuditService : IUserAccessAuditService
             var profile = new TenantProfile
             {
                 TenantUrl = site.Url,
-                ClientId = string.Empty, // Will be set by SessionManager from cached session
+                ClientId = currentProfile.ClientId,
                 Name = site.Title
             };
 

SharepointToolbox/ViewModels/Tabs/UserAccessAuditViewModel.cs

@@ -229,8 +229,15 @@ public partial class UserAccessAuditViewModel : FeatureViewModelBase
             FolderDepth: 1,
             IncludeSubsites: IncludeSubsites);
 
+        if (_currentProfile == null)
+        {
+            StatusMessage = "No tenant profile selected. Please connect first.";
+            return;
+        }
+
         var entries = await _auditService.AuditUsersAsync(
             _sessionManager,
+            _currentProfile,
             userLogins,
             effectiveSites,
             scanOptions,

SharepointToolbox/Views/Tabs/UserAccessAuditView.xaml

@@ -31,8 +31,10 @@
               </Style>
             </TextBlock.Style>
           </TextBlock>
-          <ListBox ItemsSource="{Binding SearchResults}" MaxHeight="120"
-                   ScrollViewer.VerticalScrollBarVisibility="Auto" Margin="0,0,0,4">
+          <ListBox x:Name="SearchResultsListBox"
+                   ItemsSource="{Binding SearchResults}" MaxHeight="120"
+                   ScrollViewer.VerticalScrollBarVisibility="Auto" Margin="0,0,0,4"
+                   SelectionChanged="SearchResultsListBox_SelectionChanged">
             <ListBox.Style>
               <Style TargetType="ListBox">
                 <Style.Triggers>
@@ -54,11 +56,6 @@
                 </TextBlock>
               </DataTemplate>
             </ListBox.ItemTemplate>
-            <ListBox.InputBindings>
-              <MouseBinding MouseAction="LeftClick"
-                            Command="{Binding AddUserCommand}"
-                            CommandParameter="{Binding RelativeSource={RelativeSource AncestorType=ListBox}, Path=SelectedItem}" />
-            </ListBox.InputBindings>
           </ListBox>
           <ItemsControl ItemsSource="{Binding SelectedUsers}" Margin="0,0,0,4">
             <ItemsControl.ItemTemplate>

SharepointToolbox/Views/Tabs/UserAccessAuditView.xaml.cs

@@ -1,4 +1,5 @@
 using System.Windows.Controls;
+using SharepointToolbox.Services;
 using SharepointToolbox.ViewModels.Tabs;
 
 namespace SharepointToolbox.Views.Tabs;
@@ -10,4 +11,17 @@ public partial class UserAccessAuditView : UserControl
         InitializeComponent();
         DataContext = viewModel;
     }
+
+    private void SearchResultsListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
+    {
+        if (sender is ListBox listBox && listBox.SelectedItem is GraphUserResult user)
+        {
+            var vm = (UserAccessAuditViewModel)DataContext;
+            if (vm.AddUserCommand.CanExecute(user))
+                vm.AddUserCommand.Execute(user);
+
+            // Clear selection so the same item can be re-selected if needed
+            listBox.SelectedItem = null;
+        }
+    }
 }