feat(features): refontes adhesions/admin/auth/backup/contributions/dashboard/epargne/events

- adhesions : bloc complet avec events/states/model, dialogs paiement/rejet
- admin : users bloc, user management list/detail pages
- authentication : bloc + keycloak auth service + webview
- backup : bloc complet, repository, models
- contributions : bloc + widgets + export
- dashboard : widgets connectés (activities, events, notifications, search)
  + charts + monitoring + shortcuts
- epargne : repository, transactions, dialogs
- events : bloc complet, pages (detail, connected, wrapper), models

lib/features/dashboard/presentation/widgets/common/activity_item.dart

@@ -10,28 +10,28 @@ import '../../../../../shared/design_system/unionflow_design_system.dart';
 class ActivityItem extends StatelessWidget {
   /// Titre principal de l'activité
   final String title;
-  
+
   /// Description ou détails de l'activité
   final String? description;
-  
+
   /// Horodatage de l'activité
   final String timestamp;
-  
+
   /// Icône représentative de l'activité
   final IconData? icon;
-  
+
   /// Couleur thématique de l'activité
   final Color? color;
-  
+
   /// Type d'activité pour le style automatique
   final ActivityType? type;
-  
+
   /// Callback lors du tap sur l'élément
   final VoidCallback? onTap;
-  
+
   /// Style de l'élément d'activité
   final ActivityItemStyle style;
-  
+
   /// Afficher ou non l'indicateur de statut
   final bool showStatusIndicator;
 
@@ -95,7 +95,7 @@ class ActivityItem extends StatelessWidget {
     required this.timestamp,
     this.onTap,
   }) : icon = Icons.error,
-       color = Colors.red,
+       color = ColorTokens.error,
        type = ActivityType.error,
        style = ActivityItemStyle.alert,
        showStatusIndicator = true;
@@ -108,7 +108,7 @@ class ActivityItem extends StatelessWidget {
     required this.timestamp,
     this.onTap,
   }) : icon = Icons.check_circle,
-       color = const Color(0xFF00B894),
+       color = ColorTokens.successLight,
        type = ActivityType.success,
        style = ActivityItemStyle.normal,
        showStatusIndicator = true;
@@ -123,28 +123,29 @@ class ActivityItem extends StatelessWidget {
       child: Container(
         margin: const EdgeInsets.only(bottom: 8),
         padding: _getPadding(),
-        decoration: _getDecoration(effectiveColor),
-        child: _buildContent(effectiveColor, effectiveIcon),
+        decoration: _getDecoration(context, effectiveColor),
+        child: _buildContent(context, effectiveColor, effectiveIcon),
       ),
     );
   }
 
   /// Contenu principal de l'élément
-  Widget _buildContent(Color effectiveColor, IconData effectiveIcon) {
+  Widget _buildContent(BuildContext context, Color effectiveColor, IconData effectiveIcon) {
     switch (style) {
       case ActivityItemStyle.minimal:
-        return _buildMinimalContent(effectiveColor, effectiveIcon);
+        return _buildMinimalContent(context, effectiveColor, effectiveIcon);
       case ActivityItemStyle.normal:
-        return _buildNormalContent(effectiveColor, effectiveIcon);
+        return _buildNormalContent(context, effectiveColor, effectiveIcon);
       case ActivityItemStyle.detailed:
-        return _buildDetailedContent(effectiveColor, effectiveIcon);
+        return _buildDetailedContent(context, effectiveColor, effectiveIcon);
       case ActivityItemStyle.alert:
-        return _buildAlertContent(effectiveColor, effectiveIcon);
+        return _buildAlertContent(context, effectiveColor, effectiveIcon);
     }
   }
 
   /// Contenu minimal (ligne simple)
-  Widget _buildMinimalContent(Color effectiveColor, IconData effectiveIcon) {
+  Widget _buildMinimalContent(BuildContext context, Color effectiveColor, IconData effectiveIcon) {
+    final scheme = Theme.of(context).colorScheme;
     return Row(
       children: [
         if (showStatusIndicator)
@@ -160,16 +161,17 @@ class ActivityItem extends StatelessWidget {
         Expanded(
           child: Text(
             title,
-            style: const TextStyle(
+            style: TextStyle(
               fontSize: 12,
               fontWeight: FontWeight.w500,
+              color: scheme.onSurface,
             ),
           ),
         ),
         Text(
           timestamp,
-          style: const TextStyle(
-            color: Colors.grey,
+          style: TextStyle(
+            color: scheme.onSurfaceVariant,
             fontSize: 10,
           ),
         ),
@@ -178,7 +180,8 @@ class ActivityItem extends StatelessWidget {
   }
 
   /// Contenu normal avec icône
-  Widget _buildNormalContent(Color effectiveColor, IconData effectiveIcon) {
+  Widget _buildNormalContent(BuildContext context, Color effectiveColor, IconData effectiveIcon) {
+    final scheme = Theme.of(context).colorScheme;
     return Row(
       children: [
         if (showStatusIndicator) ...[
@@ -202,10 +205,10 @@ class ActivityItem extends StatelessWidget {
             children: [
               Text(
                 title,
-                style: const TextStyle(
+                style: TextStyle(
                   fontSize: 14,
                   fontWeight: FontWeight.w600,
-                  color: Color(0xFF1F2937),
+                  color: scheme.onSurface,
                 ),
               ),
               if (description != null) ...[
@@ -214,7 +217,7 @@ class ActivityItem extends StatelessWidget {
                   description!,
                   style: TextStyle(
                     fontSize: 12,
-                    color: Colors.grey[600],
+                    color: scheme.onSurfaceVariant,
                   ),
                 ),
               ],
@@ -225,7 +228,7 @@ class ActivityItem extends StatelessWidget {
         Text(
           timestamp,
           style: TextStyle(
-            color: Colors.grey[500],
+            color: scheme.onSurfaceVariant,
             fontSize: 11,
             fontWeight: FontWeight.w500,
           ),
@@ -235,7 +238,8 @@ class ActivityItem extends StatelessWidget {
   }
 
   /// Contenu détaillé avec plus d'informations
-  Widget _buildDetailedContent(Color effectiveColor, IconData effectiveIcon) {
+  Widget _buildDetailedContent(BuildContext context, Color effectiveColor, IconData effectiveIcon) {
+    final scheme = Theme.of(context).colorScheme;
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
@@ -257,17 +261,17 @@ class ActivityItem extends StatelessWidget {
             Expanded(
               child: Text(
                 title,
-                style: const TextStyle(
+                style: TextStyle(
                   fontSize: 13,
                   fontWeight: FontWeight.w600,
-                  color: Color(0xFF1F2937),
+                  color: scheme.onSurface,
                 ),
               ),
             ),
             Text(
               timestamp,
               style: TextStyle(
-                color: Colors.grey[500],
+                color: scheme.onSurfaceVariant,
                 fontSize: 12,
                 fontWeight: FontWeight.w500,
               ),
@@ -282,7 +286,7 @@ class ActivityItem extends StatelessWidget {
               description!,
               style: TextStyle(
                 fontSize: 14,
-                color: Colors.grey[700],
+                color: scheme.onSurfaceVariant,
                 height: 1.4,
               ),
             ),
@@ -293,7 +297,8 @@ class ActivityItem extends StatelessWidget {
   }
 
   /// Contenu pour les alertes avec style spécial
-  Widget _buildAlertContent(Color effectiveColor, IconData effectiveIcon) {
+  Widget _buildAlertContent(BuildContext context, Color effectiveColor, IconData effectiveIcon) {
+    final scheme = Theme.of(context).colorScheme;
     return Row(
       children: [
         Icon(
@@ -320,7 +325,7 @@ class ActivityItem extends StatelessWidget {
                   description!,
                   style: TextStyle(
                     fontSize: 12,
-                    color: Colors.grey[600],
+                    color: scheme.onSurfaceVariant,
                   ),
                 ),
               ],
@@ -331,7 +336,7 @@ class ActivityItem extends StatelessWidget {
         Text(
           timestamp,
           style: TextStyle(
-            color: Colors.grey[500],
+            color: scheme.onSurfaceVariant,
             fontSize: 11,
           ),
         ),
@@ -366,7 +371,7 @@ class ActivityItem extends StatelessWidget {
   /// Icône effective selon le type
   IconData _getEffectiveIcon() {
     if (icon != null) return icon!;
-    
+
     switch (type) {
       case ActivityType.system:
         return Icons.settings;
@@ -401,19 +406,20 @@ class ActivityItem extends StatelessWidget {
     }
   }
 
-  /// Décoration selon le style
-  BoxDecoration _getDecoration(Color effectiveColor) {
+  /// Décoration selon le style — toujours theme-aware
+  BoxDecoration _getDecoration(BuildContext context, Color effectiveColor) {
+    final scheme = Theme.of(context).colorScheme;
     switch (style) {
       case ActivityItemStyle.minimal:
         return const BoxDecoration();
       case ActivityItemStyle.normal:
         return BoxDecoration(
-          color: Colors.white,
+          color: scheme.surface,
           borderRadius: BorderRadius.circular(6),
         );
       case ActivityItemStyle.detailed:
         return BoxDecoration(
-          color: Colors.white,
+          color: scheme.surface,
           borderRadius: BorderRadius.circular(8),
         );
       case ActivityItemStyle.alert: