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.Tests/Infrastructure/WpfTestApp.cs

@@ -0,0 +1,33 @@
+using System.Windows;
+using VideoDownloader.App;
+
+namespace VideoDownloader.Tests.Infrastructure;
+
+/// <summary>
+/// 테스트 프로세스에는 App.xaml 의 리소스가 없으므로, App 어셈블리의 테마 사전을
+/// 테스트 전용 Application 에 로드한다(앱의 App.ApplyTheme 과 동일 순서: 색 → 스타일).
+/// </summary>
+public static class WpfTestApp
+{
+    private static bool _initialized;
+
+    public static void Ensure(System.Windows.Threading.Dispatcher dispatcher)
+    {
+        dispatcher.Invoke(() =>
+        {
+            if (_initialized) return;
+            if (Application.Current == null)
+                new Application { ShutdownMode = ShutdownMode.OnExplicitShutdown };
+            var md = Application.Current.Resources.MergedDictionaries;
+            if (md.Count == 0)
+            {
+                const string asm = "/VideoDownloader;component";
+                md.Add(new ResourceDictionary { Source = new Uri(asm + "/Themes/Dark.xaml", UriKind.Relative) });
+                md.Add(new ResourceDictionary { Source = new Uri(asm + "/Themes/Shared.xaml", UriKind.Relative) });
+            }
+            if (!Application.Current.Resources.Contains("InverseCountToVisibility"))
+                Application.Current.Resources["InverseCountToVisibility"] = new InverseCountToVisibilityConverter();
+            _initialized = true;
+        });
+    }
+}