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/shared/design_system/components/uf_header.dart

@@ -31,7 +31,7 @@ class UFHeader extends StatelessWidget {
       padding: const EdgeInsets.all(SpacingTokens.xl),
       decoration: BoxDecoration(
         gradient: const LinearGradient(
-          colors: ColorTokens.primaryGradient,
+          colors: [AppColors.primaryGreen, AppColors.brandGreenLight],
         ),
         borderRadius: BorderRadius.circular(SpacingTokens.radiusLg),
         boxShadow: ShadowTokens.primary,
@@ -42,12 +42,12 @@ class UFHeader extends StatelessWidget {
           Container(
             padding: const EdgeInsets.all(SpacingTokens.sm),
             decoration: BoxDecoration(
-              color: ColorTokens.onPrimary.withOpacity(0.2),
+              color: Colors.white.withOpacity(0.2),
               borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
             ),
             child: Icon(
               icon,
-              color: ColorTokens.onPrimary,
+              color: Colors.white,
               size: 24,
             ),
           ),
@@ -60,16 +60,16 @@ class UFHeader extends StatelessWidget {
               children: [
                 Text(
                   title,
-                  style: TypographyTokens.titleLarge.copyWith(
-                    color: ColorTokens.onPrimary,
+                  style: AppTypography.headerSmall.copyWith(
+                    color: Colors.white,
                   ),
                 ),
                 if (subtitle != null) ...[
                   const SizedBox(height: SpacingTokens.xs),
                   Text(
                     subtitle!,
-                    style: TypographyTokens.bodySmall.copyWith(
-                      color: ColorTokens.onPrimary.withOpacity(0.8),
+                    style: AppTypography.subtitleSmall.copyWith(
+                      color: Colors.white.withOpacity(0.8),
                     ),
                   ),
                 ],
@@ -94,14 +94,14 @@ class UFHeader extends StatelessWidget {
         if (onNotificationTap != null)
           Container(
             decoration: BoxDecoration(
-              color: ColorTokens.onPrimary.withOpacity(0.2),
+              color: Colors.white.withOpacity(0.2),
               borderRadius: BorderRadius.circular(SpacingTokens.radiusSm),
             ),
             child: IconButton(
               onPressed: onNotificationTap,
               icon: const Icon(
                 Icons.notifications_outlined,
-                color: ColorTokens.onPrimary,
+                color: Colors.white,
               ),
             ),
           ),
@@ -110,14 +110,14 @@ class UFHeader extends StatelessWidget {
         if (onSettingsTap != null)
           Container(
             decoration: BoxDecoration(
-              color: ColorTokens.onPrimary.withOpacity(0.2),
+              color: Colors.white.withOpacity(0.2),
               borderRadius: BorderRadius.circular(SpacingTokens.radiusSm),
             ),
             child: IconButton(
               onPressed: onSettingsTap,
               icon: const Icon(
                 Icons.settings_outlined,
-                color: ColorTokens.onPrimary,
+                color: Colors.white,
               ),
             ),
           ),