feat(03-08): DI registration + MainWindow wiring for Search and Duplicates tabs

- App.xaml.cs: register ISearchService, SearchCsvExportService, SearchHtmlExportService, SearchViewModel, SearchView, IDuplicatesService, DuplicatesHtmlExportService, DuplicatesViewModel, DuplicatesView
- MainWindow.xaml: add x:Name to SearchTabItem and DuplicatesTabItem (remove FeatureTabBase stubs)
- MainWindow.xaml.cs: wire SearchTabItem.Content and DuplicatesTabItem.Content via DI

SharepointToolbox/App.xaml.cs

@@ -95,6 +95,19 @@ public partial class App : Application
         services.AddTransient<StorageViewModel>();
         services.AddTransient<StorageView>();
 
+        // Phase 3: File Search
+        services.AddTransient<ISearchService, SearchService>();
+        services.AddTransient<SearchCsvExportService>();
+        services.AddTransient<SearchHtmlExportService>();
+        services.AddTransient<SearchViewModel>();
+        services.AddTransient<SearchView>();
+
+        // Phase 3: Duplicates
+        services.AddTransient<IDuplicatesService, DuplicatesService>();
+        services.AddTransient<DuplicatesHtmlExportService>();
+        services.AddTransient<DuplicatesViewModel>();
+        services.AddTransient<DuplicatesView>();
+
         // Phase 2: Permissions
         services.AddTransient<IPermissionsService, PermissionsService>();
         services.AddTransient<ISiteListService, SiteListService>();

SharepointToolbox/MainWindow.xaml

@@ -47,11 +47,11 @@
       <TabItem x:Name="StorageTabItem"
                Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[tab.storage]}">
       </TabItem>
-      <TabItem Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[tab.search]}">
+      <TabItem x:Name="SearchTabItem"
-        <controls:FeatureTabBase />
+               Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[tab.search]}">
       </TabItem>
-      <TabItem Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[tab.duplicates]}">
+      <TabItem x:Name="DuplicatesTabItem"
-        <controls:FeatureTabBase />
+               Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[tab.duplicates]}">
       </TabItem>
       <TabItem Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[tab.templates]}">
         <controls:FeatureTabBase />

SharepointToolbox/MainWindow.xaml.cs

@@ -26,6 +26,12 @@ public partial class MainWindow : Window
         // Replace Storage tab placeholder with the DI-resolved StorageView
         StorageTabItem.Content = serviceProvider.GetRequiredService<StorageView>();
 
+        // Replace Search tab placeholder with the DI-resolved SearchView
+        SearchTabItem.Content = serviceProvider.GetRequiredService<SearchView>();
+
+        // Replace Duplicates tab placeholder with the DI-resolved DuplicatesView
+        DuplicatesTabItem.Content = serviceProvider.GetRequiredService<DuplicatesView>();
+
         // Replace Settings tab placeholder with the DI-resolved SettingsView
         SettingsTabItem.Content = serviceProvider.GetRequiredService<SettingsView>();