Fix ai chat not on fx thread (JabRef#11796)

* Fix ai chat not on fx thread

Fixes JabRef/jabref-issue-melting-pot#549

* fix import

Author: Siedlerchr

src/main/java/org/jabref/gui/ai/components/aichat/AiChatComponent.java

@@ -21,6 +21,7 @@
 import org.jabref.gui.ai.components.util.notifications.Notification;
 import org.jabref.gui.ai.components.util.notifications.NotificationsComponent;
 import org.jabref.gui.icon.IconTheme;
+import org.jabref.gui.util.UiTaskExecutor;
 import org.jabref.logic.ai.AiPreferences;
 import org.jabref.logic.ai.AiService;
 import org.jabref.logic.ai.chatting.AiChatLogic;
@@ -140,7 +141,7 @@ private void updateNotifications() {
         notificationsButton.setManaged(!notifications.isEmpty());
 
         if (!notifications.isEmpty()) {
-            notificationsButton.setGraphic(IconTheme.JabRefIcons.WARNING.withColor(Color.YELLOW).getGraphicNode());
+            UiTaskExecutor.runInJavaFXThread(() -> notificationsButton.setGraphic(IconTheme.JabRefIcons.WARNING.withColor(Color.YELLOW).getGraphicNode()));
         }
     }