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/presentation/widgets/shared/mini_header_bar.dart

@@ -0,0 +1,63 @@
+import 'package:flutter/material.dart';
+import '../../../shared/design_system/tokens/app_colors.dart';
+import '../../../shared/design_system/tokens/app_typography.dart';
+import '../../../shared/widgets/mini_avatar.dart';
+
+/// UnionFlow Mobile - Composant DRY : MiniHeaderBar
+/// Remplace l'AppBar massive. Maximum 35-40px de hauteur.
+class MiniHeaderBar extends StatelessWidget implements PreferredSizeWidget {
+  final String title;
+  final String? profileImageUrl;
+  final Widget? trailing;
+
+  const MiniHeaderBar({
+    Key? key,
+    required this.title,
+    this.profileImageUrl,
+    this.trailing,
+  }) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    final isDark = Theme.of(context).brightness == Brightness.dark;
+
+    return Container(
+      color: Theme.of(context).scaffoldBackgroundColor,
+      padding: EdgeInsets.only(
+        top: MediaQuery.of(context).padding.top + 8, // Respecte la Status Bar
+        bottom: 8,
+        left: 16,
+        right: 16,
+      ),
+      child: Row(
+        mainAxisAlignment: MainAxisAlignment.spaceBetween,
+        children: [
+          // Bouton Menu/Profil à gauche
+          GestureDetector(
+            onTap: () {
+              Scaffold.of(context).openDrawer();
+            },
+            child: MiniAvatar(
+              imageUrl: profileImageUrl,
+              fallbackText: 'ME',
+              size: 28,
+            ),
+          ),
+          
+          // Titre central (Petit)
+          Text(
+            title,
+            style: AppTypography.headerSmall.copyWith(
+              color: isDark ? AppColors.textPrimaryDark : AppColors.textPrimaryLight,
+            ),
+          ),
+          
+          if (trailing != null) trailing! else const SizedBox(width: 28),
+        ],
+      ),
+    );
+  }
+
+  @override
+  Size get preferredSize => const Size.fromHeight(40.0);
+}