feat: WebSocket temps réel + Finance Workflow + corrections

- Task #6: WebSocket /ws/dashboard + Kafka events (5 topics)
  * Backend: KafkaEventProducer, KafkaEventConsumer
  * Mobile: WebSocketService (reconnection, heartbeat, typed events)
  * DashboardBloc: Auto-refresh depuis WebSocket events

- Finance Workflow: approbations + budgets (backend + mobile)
  * Backend: entities, services, resources, migrations Flyway V6
  * Mobile: features finance_workflow complète avec BLoC

- Corrections DI: interfaces IRepository partout
  * IProfileRepository, IOrganizationRepository, IMembreRepository
  * GetIt configuré avec @injectable

- Spec-Kit: constitution + templates mis à jour
  * .specify/memory/constitution.md enrichie
  * Templates agent, plan, spec, tasks, checklist

- Nettoyage: fichiers temporaires supprimés

Signed-off-by: lions dev Team

unionflow/unionflow-mobile-apps/lib/features/settings/presentation/pages/feedback_page.dart

@@ -5,6 +5,7 @@ library feedback_page;
 import 'package:flutter/material.dart';
 import 'package:get_it/get_it.dart';
 import 'package:dio/dio.dart';
+import '../../../../core/utils/logger.dart';
 import '../../../../shared/design_system/unionflow_design_system.dart';
 
 class FeedbackPage extends StatefulWidget {
@@ -54,7 +55,8 @@ class _FeedbackPageState extends State<FeedbackPage> {
         _messageController.clear();
         _showSnackBar('Merci pour votre retour !');
       }
-    } catch (_) {
+    } catch (e, st) {
+      AppLogger.error('FeedbackPage: envoi feedback échoué', error: e, stackTrace: st);
       if (mounted) {
         _showSnackBar('Envoi échoué. Réessayez plus tard.', isError: true);
       }