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/widgets/mini_avatar.dart

@@ -0,0 +1,107 @@
+import 'package:flutter/material.dart';
+import 'package:cached_network_image/cached_network_image.dart';
+import '../design_system/tokens/app_colors.dart';
+import '../design_system/tokens/app_typography.dart';
+
+/// UnionFlow Mobile - Composant DRY : MiniAvatar
+/// Évite toute répétition de configuration d'image de profil.
+/// Formats contraints (24px, 32px max).
+class MiniAvatar extends StatelessWidget {
+  final String? imageUrl;
+  final String fallbackText; // Ex: "JD" pour John Doe
+  final double size;
+  final bool isOnline; // Ajoute une petite pastille verte
+  final Color? backgroundColor;
+  final Color? iconColor;
+  final bool isIcon;
+
+  const MiniAvatar({
+    Key? key,
+    this.imageUrl,
+    required this.fallbackText,
+    this.size = 32.0,
+    this.isOnline = false,
+    this.backgroundColor,
+    this.iconColor,
+    this.isIcon = false,
+  }) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Stack(
+      children: [
+        Container(
+          width: size,
+          height: size,
+          decoration: BoxDecoration(
+            shape: BoxShape.circle,
+            color: backgroundColor ?? AppColors.primaryGreen.withOpacity(0.1),
+            border: Border.all(
+              color: AppColors.lightBorder,
+              width: 0.5,
+            ),
+          ),
+          child: ClipOval(
+            child: isIcon 
+                ? _buildIcon()
+                : (imageUrl != null && imageUrl!.isNotEmpty
+                    ? CachedNetworkImage(
+                        imageUrl: imageUrl!,
+                        fit: BoxFit.cover,
+                        placeholder: (context, url) => _buildFallback(),
+                        errorWidget: (context, url, error) => _buildFallback(),
+                      )
+                    : _buildFallback()),
+          ),
+        ),
+        if (isOnline)
+          Positioned(
+            bottom: 0,
+            right: 0,
+            child: Container(
+              width: size * 0.3,
+              height: size * 0.3,
+              decoration: BoxDecoration(
+                color: AppColors.success,
+                shape: BoxShape.circle,
+                border: Border.all(
+                  color: Theme.of(context).scaffoldBackgroundColor,
+                  width: 1.5,
+                ),
+              ),
+            ),
+          ),
+      ],
+    );
+  }
+
+  Widget _buildFallback() {
+    return Center(
+      child: Text(
+        fallbackText.toUpperCase(),
+        style: AppTypography.actionText.copyWith(
+          color: iconColor ?? AppColors.primaryGreen,
+          fontSize: size * 0.4,
+        ),
+      ),
+    );
+  }
+
+  Widget _buildIcon() {
+    IconData iconData;
+    switch (fallbackText) {
+      case 'people': iconData = Icons.people; break;
+      case 'event': iconData = Icons.event; break;
+      case 'business': iconData = Icons.business; break;
+      case 'settings': iconData = Icons.settings; break;
+      default: iconData = Icons.notifications;
+    }
+    return Center(
+      child: Icon(
+        iconData,
+        color: iconColor ?? AppColors.primaryGreen,
+        size: size * 0.6,
+      ),
+    );
+  }
+}