chore: release v2.4

- Add theme system (Dark/Light palettes, ModernTheme, ThemeManager)
- Add InputDialog, Spinner common view
- Add DuplicatesCsvExportService
- Refresh views, dialogs, and view models across tabs
- Update localization strings (en/fr)
- Tweak services (transfer, permissions, search, user access, ownership elevation, bulk operations)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

SharepointToolbox/Views/Tabs/TemplatesView.xaml

@@ -4,7 +4,9 @@
              xmlns:loc="clr-namespace:SharepointToolbox.Localization">
     <DockPanel Margin="10">
         <!-- Left panel: Capture and Apply -->
-        <StackPanel DockPanel.Dock="Left" Width="320" Margin="0,0,10,0">
+        <ScrollViewer DockPanel.Dock="Left" Width="320" Margin="0,0,10,0"
+                      VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Disabled">
+        <StackPanel>
             <!-- Capture Section -->
             <GroupBox Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[templates.capture]}"
                       Margin="0,0,0,10">
@@ -52,6 +54,7 @@
             <!-- Progress -->
             <TextBlock Text="{Binding StatusMessage}" TextWrapping="Wrap" Margin="0,5,0,0" />
         </StackPanel>
+        </ScrollViewer>
 
         <!-- Right panel: Template list -->
         <DockPanel>