Phase 0 (T1-3/4/7/9/11): find bar w/ native Find API + search engine + site zoom + force reload + F11, wired into MainWindow, E2E smoke (39 tests)

VideoDownloader.App/SettingsWindow.xaml.cs

@@ -4,6 +4,7 @@ using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Interop;
 using Microsoft.Win32;
+using VideoDownloader.App.Browser;
 using VideoDownloader.Core.Config;
 using VideoDownloader.Core.Social;
 
@@ -54,6 +55,19 @@ public partial class SettingsWindow : Window
         ProfileModeText.Text = config.PrivateMode
             ? "개인정보 보호 모드(InPrivate) — 데이터를 저장하지 않습니다"
             : "일반 모드 — 쿠키·세션·localStorage 를 프로필에 보존합니다";
+
+        SearchEngineBox.ItemsSource = SearchEngines.Presets.Select(e => e.Name).ToList();
+        SearchEngineBox.SelectedItem = SearchEngines.FindByName(config.SearchEngine)?.Name ?? "Google";
+        if (SearchEngineBox.SelectedIndex < 0) SearchEngineBox.SelectedIndex = 0;
+    }
+
+    private void SearchEngineBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
+    {
+        if (SearchEngineHint == null) return;
+        var engine = SearchEngines.FindByName(SearchEngineBox.SelectedItem as string);
+        SearchEngineHint.Text = engine == null
+            ? "주소창에 검색어를 입력하면 검색합니다"
+            : $"주소창에 검색어 입력 시 {engine.Name}(으)로 검색합니다. `g 검색어`처럼 키워드로 즉시 전환도 가능해요";
     }
 
     private void BrowseFolder(object sender, RoutedEventArgs e)
@@ -134,6 +148,7 @@ public partial class SettingsWindow : Window
         Config.AutoInstallDeno = AutoInstallDenoBox.IsChecked == true;
         Config.DefaultSocialQuality = (DefaultQualityBox.SelectedValue as string) ?? "best";
         Config.YoutubePlayerClients = string.IsNullOrWhiteSpace(YoutubeClientsBox.Text) ? null : YoutubeClientsBox.Text.Trim();
+        Config.SearchEngine = SearchEngineBox.SelectedItem as string ?? "Google";
 
         DialogResult = true;
     }