loading state and error handling refactor

lib/state/app/infrastructure/loadableState/bloc/loadable_state_bloc.dart

@@ -41,6 +41,12 @@ class LoadableStateBloc extends Bloc<LoadableStateEvent, LoadableStateState> {
       ? Colors.grey.shade600
       : Theme.of(context).primaryColor;
 
+  Color connectionForegroundColor(BuildContext context) => connectivityStatusKnown() && !isConnected()
+      ? Colors.white
+      : ThemeData.estimateBrightnessForColor(Theme.of(context).primaryColor) == Brightness.dark
+          ? Colors.white
+          : Colors.black;
+
   String connectionText({int? lastUpdated}) => connectivityStatusKnown()
       ? isConnected()
         ? 'Verbindung fehlgeschlagen'