added guardian login with views for their assigned childs

lib/state/app/infrastructure/utility_widgets/loadable_hydrated_bloc/loadable_hydrated_bloc.dart

@@ -2,7 +2,9 @@ import 'dart:developer';
 
 import 'package:hydrated_bloc/hydrated_bloc.dart';
 
+import '../../../../../access/access_requirement.dart';
 import '../../../../../api/errors/error_mapper.dart';
+import '../../../../../session/session_manager.dart';
 import '../../loadable_state/loadable_state.dart';
 import '../../loadable_state/loading_error.dart';
 import '../../repository/repository.dart';
@@ -114,6 +116,13 @@ abstract class LoadableHydratedBloc<
     add(Reset<TState>());
   }
 
+  /// Backend identities the data needs. Without them loading is a no-op, so
+  /// reading the bloc in a session that lacks them (e.g. guardians and the
+  /// Nextcloud blocs) is harmless.
+  Set<AccessRequirement> get requirements => const {};
+
+  bool get requirementsMet => requirements.areMetBy(SessionManager().current);
+
   TState? get innerState => state.data;
   TRepository get repo => _repository;
 
@@ -137,6 +146,7 @@ abstract class LoadableHydratedBloc<
   );
 
   void fetch() {
+    if (!requirementsMet) return;
     log('Fetching data for ${TState.toString()}');
     gatherData()
         .catchError((Object e) {