fix: Game detection improvements

toju-app/src/app/domains/README.md

@@ -15,7 +15,7 @@ infrastructure adapters and UI.
 | **direct-message**   | One-to-one WebRTC messages, offline queueing, delivery state, and friends                                          | `DirectMessageService`, `FriendService`                     |
 | **direct-call**      | Direct and small-group private calls initiated from people cards and direct messages                               | `DirectCallService`                                         |
 | **experimental-media** | Optional media playback experiments kept isolated from the default attachment path                               | `ExperimentalMediaSettingsService`                          |
-| **game-activity**    | Local game detection, server metadata matching, P2P now-playing sync, and elapsed playtime formatting              | `GameActivityService`, `formatGameActivityElapsed()`        |
+| **game-activity**    | Foreground-window-first game detection with confidence scoring (`MIN_GAME_CONFIDENCE`), server metadata matching, P2P now-playing sync, and elapsed playtime formatting | `GameActivityService`, `formatGameActivityElapsed()`        |
 | **notifications**    | Notification preferences, unread tracking, desktop alert orchestration                                             | `NotificationsFacade`                                       |
 | **plugins**          | Client-only plugin manifests, load ordering, registry state, and signal-server support metadata                    | `PluginHostService`, `PluginRegistryService`                |
 | **profile-avatar**   | Profile picture upload, crop/zoom editing, processing, local persistence, and P2P avatar sync                     | `ProfileAvatarFacade`                                       |