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/pages/advanced_dashboard_page.dart

@@ -59,7 +59,7 @@ class _AdvancedDashboardPageState extends State<AdvancedDashboardPage>
     return BlocProvider(
       create: (context) => _dashboardBloc,
       child: Scaffold(
-        backgroundColor: AppColors.lightBackground,
+        backgroundColor: Theme.of(context).scaffoldBackgroundColor,
         appBar: const UFAppBar(
           title: 'DASHBOARD AVANCÉ',
         ),
@@ -92,7 +92,7 @@ class _AdvancedDashboardPageState extends State<AdvancedDashboardPage>
         background: Container(
           decoration: BoxDecoration(
             gradient: LinearGradient(
-              colors: [AppColors.primaryGreen, AppColors.brandGreen],
+              colors: [AppColors.primary, AppColors.primaryDark],
               begin: Alignment.topLeft,
               end: Alignment.bottomRight,
             ),
@@ -258,13 +258,13 @@ class _AdvancedDashboardPageState extends State<AdvancedDashboardPage>
     return Container(
       decoration: BoxDecoration(
         color: Theme.of(context).cardColor,
-        border: Border(bottom: BorderSide(color: AppColors.lightBorder, width: 1)),
+        border: Border(bottom: BorderSide(color: AppColors.border, width: 1)),
       ),
       child: TabBar(
         controller: _tabController,
-        labelColor: AppColors.primaryGreen,
-        unselectedLabelColor: AppColors.textSecondaryLight,
-        indicatorColor: AppColors.primaryGreen,
+        labelColor: AppColors.primary,
+        unselectedLabelColor: AppColors.textSecondary,
+        indicatorColor: AppColors.primary,
         indicatorWeight: 3,
         labelStyle: AppTypography.actionText.copyWith(fontSize: 10, fontWeight: FontWeight.bold, letterSpacing: 1),
         tabs: const [
@@ -279,7 +279,7 @@ class _AdvancedDashboardPageState extends State<AdvancedDashboardPage>
   Widget _buildOverviewTab() {
     return RefreshIndicator(
       onRefresh: () async => _refreshDashboardData(),
-      color: AppColors.primaryGreen,
+      color: AppColors.primary,
       child: SingleChildScrollView(
         padding: const EdgeInsets.all(12),
         child: Column(
@@ -367,7 +367,7 @@ class _AdvancedDashboardPageState extends State<AdvancedDashboardPage>
             'Rapport Mensuel',
             'Synthèse complète des activités du mois',
             Icons.calendar_month_outlined,
-            AppColors.primaryGreen,
+            AppColors.primary,
           ),
           const SizedBox(height: 12),
           _buildReportCard(
@@ -458,7 +458,7 @@ class _AdvancedDashboardPageState extends State<AdvancedDashboardPage>
               ],
             ),
           ),
-          const Icon(Icons.download_outlined, color: AppColors.textSecondaryLight, size: 18),
+          const Icon(Icons.download_outlined, color: AppColors.textSecondary, size: 18),
         ],
       ),
     );
@@ -469,7 +469,7 @@ class _AdvancedDashboardPageState extends State<AdvancedDashboardPage>
       onPressed: () {
         // Actions rapides
       },
-      backgroundColor: AppColors.primaryGreen,
+      backgroundColor: AppColors.primary,
       child: const Icon(Icons.add, color: Colors.white),
     );
   }