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/organizations/presentation/widgets/create_organization_dialog.dart

@@ -209,7 +209,7 @@ class _CreateOrganizationDialogState extends State<CreateOrganizationDialog> {
                           labelText: 'Site web',
                           border: OutlineInputBorder(),
                           prefixIcon: Icon(Icons.language),
-                          hintText: 'https://www.exemple.com',
+                          hintText: 'https://',
                         ),
                         keyboardType: TextInputType.url,
                       ),

unionflow/unionflow-mobile-apps/lib/features/organizations/presentation/widgets/edit_organization_dialog.dart

@@ -308,7 +308,7 @@ class _EditOrganizationDialogState extends State<EditOrganizationDialog> {
         labelText: 'Site web',
         border: OutlineInputBorder(),
         prefixIcon: Icon(Icons.language),
-        hintText: 'https://www.exemple.com',
+        hintText: 'https://',
       ),
       keyboardType: TextInputType.url,
     );