feat(features): refontes onboarding/organizations/profile/reports/settings/solidarity

- onboarding : datasource souscription, models formule/status, bloc complet
- organizations : bloc orgs + switcher + types bloc, models, pages edit/create
- profile : bloc complet avec change password, delete account, preferences
- reports : bloc avec DashboardReports + ScheduleReports + GenerateReport
- settings : language, privacy, feedback pages
- solidarity : bloc complet demandes d'aide (CRUD, approuver, rejeter)

lib/features/solidarity/presentation/widgets/create_demande_aide_dialog.dart

@@ -5,6 +5,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:get_it/get_it.dart';
 import '../../../../core/utils/logger.dart';
+import '../../../../shared/design_system/unionflow_design_system.dart';
 import '../../bloc/solidarity_bloc.dart';
 import '../../data/models/demande_aide_model.dart';
 import '../../../organizations/domain/repositories/organization_repository.dart';
@@ -146,7 +147,7 @@ class _CreateDemandeAideDialogState extends State<CreateDemandeAideDialog> {
                   enabled: false,
                 )
               else
-                const Text('Impossible de récupérer votre profil', style: TextStyle(color: Colors.red)),
+                const Text('Impossible de récupérer votre profil', style: TextStyle(color: AppColors.error)),
               const SizedBox(height: 12),
               TextFormField(
                 controller: _titreController,