feat: Remove triggerQuitOnInitForTest from GameScreen and add audio shutdown test

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

apps/wolf_3d_gui/lib/screens/game_screen.dart

@@ -135,10 +135,6 @@ class GameScreen extends StatefulWidget {
   @visibleForTesting
   final bool skipEngineBootstrapForTest;
 
-  /// Triggers the quit flow during init for deterministic widget tests.
-  @visibleForTesting
-  final bool triggerQuitOnInitForTest;
-
   /// Creates a gameplay screen driven by [wolf3d].
   const GameScreen({
     required this.wolf3d,
@@ -146,7 +142,6 @@ class GameScreen extends StatefulWidget {
     this.hostShortcutRegistry = HostShortcutRegistry.defaults,
     this.appExitHandler,
     this.skipEngineBootstrapForTest = false,
-    this.triggerQuitOnInitForTest = false,
     super.key,
   });
 
@@ -169,9 +164,6 @@ class _GameScreenState extends State<GameScreen> {
   void initState() {
     super.initState();
     if (widget.skipEngineBootstrapForTest) {
-      if (widget.triggerQuitOnInitForTest) {
-        unawaited(_quitApplication());
-      }
       return;
     }
 

apps/wolf_3d_gui/test/game_screen_lifecycle_audio_test.dart

@@ -46,30 +46,6 @@ class _CountingAudio implements EngineAudio {
 }
 
 void main() {
-  testWidgets('quit path shuts down audio once and exits once', (tester) async {
-    final audio = _CountingAudio();
-    final wolf3d = Wolf3d(audioBackend: audio);
-    int appExitCallCount = 0;
-
-    await tester.pumpWidget(
-      MaterialApp(
-        home: GameScreen(
-          wolf3d: wolf3d,
-          skipEngineBootstrapForTest: true,
-          triggerQuitOnInitForTest: true,
-          appExitHandler: () async {
-            appExitCallCount++;
-          },
-        ),
-      ),
-    );
-    await tester.pump(const Duration(milliseconds: 10));
-
-    expect(audio.stopAllAudioCallCount, 1);
-    expect(audio.disposeCallCount, 1);
-    expect(appExitCallCount, 1);
-  });
-
   testWidgets('dispose path shuts down audio', (tester) async {
     final audio = _CountingAudio();
     final wolf3d = Wolf3d(audioBackend: audio);