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/pubspec.yaml

@@ -45,6 +45,7 @@ dependencies:
 
   # UI Components
   cached_network_image: ^3.4.1
+  flutter_svg: ^2.0.10+1
   shimmer: ^3.0.0
   pull_to_refresh: ^2.0.0
 
@@ -82,4 +83,17 @@ dev_dependencies:
 
 flutter:
   uses-material-design: true
-  generate: true
+  generate: true
+  assets:
+    - assets/images/
+    - assets/images/payment_methods/wave/
+    - assets/images/payment_methods/orange_money/
+    - assets/images/payment_methods/free_money/
+    - assets/images/payment_methods/mtn_money/
+    - assets/images/payment_methods/moov_money/
+    - assets/images/payment_methods/mobile_money/
+    - assets/images/payment_methods/especes/
+    - assets/images/payment_methods/virement/
+    - assets/images/payment_methods/cheque/
+    - assets/images/payment_methods/carte_bancaire/
+    - assets/images/payment_methods/autre/