Add configuration change debouncing to game list online status updates

- Add OnConfigurationChanged() slot to debounce rapid configuration changes
- Implement 500ms timer to batch configuration update requests
- Prevents excessive network requests when multiple config changes occur
  in quick succession
- Improves performance and reduces server load

Signed-off-by: Zephyron <zephyron@citron-emu.org>

src/citron/game_list.cpp

@@ -683,6 +683,18 @@ play_time_manager{play_time_manager_}, system{system_} {
     online_status_timer = new QTimer(this);
     connect(online_status_timer, &QTimer::timeout, this, &GameList::UpdateOnlineStatus);
     online_status_timer->start(5000); // Your refresh interval
+
+    // Configure the new timer for debouncing configuration changes
+    config_update_timer.setSingleShot(true);
+    connect(&config_update_timer, &QTimer::timeout, this, &GameList::UpdateOnlineStatus);
+}
+
+void GameList::OnConfigurationChanged() {
+    // This function debounces the update requests. Instead of starting a network
+    // request immediately, it starts a 500ms timer. If another config change happens,
+    // the timer is simply reset. The network request will only happen once, 500ms
+    // after the *last* change was made.
+    config_update_timer.start(500);
 }
 
 void GameList::UnloadController() {

src/citron/game_list.h

@@ -141,6 +141,9 @@ signals:
     void PopulatingCompleted();
     void SaveConfig();
 
+public slots:
+    void OnConfigurationChanged();
+
 private slots:
     void OnItemExpanded(const QModelIndex& item);
     void OnTextChanged(const QString& new_text);
@@ -201,6 +204,7 @@ private:
     ControllerNavigation* controller_navigation = nullptr;
     CompatibilityList compatibility_list;
     QTimer* online_status_timer;
+    QTimer config_update_timer; // NEW: Timer for debouncing config changes
 
     friend class GameListSearchField;