claude refactorings, flutter best practices, platform dependent changes, general cleanup

lib/state/app/modules/marianum_message/repository/marianum_message_repository.dart

@@ -0,0 +1,7 @@
+import '../../../infrastructure/repository/repository.dart';
+import '../bloc/marianum_message_state.dart';
+import '../data_provider/marianum_message_get_messages.dart';
+
+class MarianumMessageRepository extends Repository<MarianumMessageState> {
+  Future<MarianumMessageList> getMessages() => MarianumMessageGetMessages().run();
+}