feat: add episode action setting

close #1351

test/services/settings_service_test.dart

@@ -87,6 +87,20 @@ void main() {
     });
   });
 
+  group('SettingsService episode action', () {
+    test('defaults to play and resets to play', () async {
+      final settings = await SettingsService.getInstance();
+
+      expect(settings.read(SettingsService.episodeAction), EpisodeAction.play);
+
+      await settings.write(SettingsService.episodeAction, EpisodeAction.details);
+      expect(settings.read(SettingsService.episodeAction), EpisodeAction.details);
+
+      await settings.resetAllSettings();
+      expect(settings.read(SettingsService.episodeAction), EpisodeAction.play);
+    });
+  });
+
   group('SettingsService platform gates', () {
     test('audio passthrough stays available on desktop but not Apple TV', () {
       expect(PlatformDetector.supportsAudioPassthrough(), isTrue);

test/utils/media_navigation_helper_test.dart

@@ -2,6 +2,7 @@ import 'package:flutter_test/flutter_test.dart';
 import 'package:plezy/media/media_backend.dart';
 import 'package:plezy/media/media_item.dart';
 import 'package:plezy/media/media_kind.dart';
+import 'package:plezy/services/settings_service.dart';
 import 'package:plezy/utils/media_navigation_helper.dart';
 
 void main() {
@@ -57,4 +58,46 @@ void main() {
     expect(target.initialSeasonId, isNull);
     expect(target.initialEpisodeId, isNull);
   });
+
+  group('episode activation details decision', () {
+    test('normal activation uses the episode action setting', () {
+      expect(
+        shouldOpenEpisodeDetailsForActivation(
+          playDirectly: false,
+          continueWatchingAction: ContinueWatchingAction.details,
+          episodeAction: EpisodeAction.play,
+        ),
+        isFalse,
+      );
+
+      expect(
+        shouldOpenEpisodeDetailsForActivation(
+          playDirectly: false,
+          continueWatchingAction: ContinueWatchingAction.play,
+          episodeAction: EpisodeAction.details,
+        ),
+        isTrue,
+      );
+    });
+
+    test('play-direct activation uses only the continue watching action setting', () {
+      expect(
+        shouldOpenEpisodeDetailsForActivation(
+          playDirectly: true,
+          continueWatchingAction: ContinueWatchingAction.play,
+          episodeAction: EpisodeAction.details,
+        ),
+        isFalse,
+      );
+
+      expect(
+        shouldOpenEpisodeDetailsForActivation(
+          playDirectly: true,
+          continueWatchingAction: ContinueWatchingAction.details,
+          episodeAction: EpisodeAction.play,
+        ),
+        isTrue,
+      );
+    });
+  });
 }