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/settings/theme_selector_widget.dart

@@ -40,7 +40,7 @@ class _ThemeSelectorWidgetState extends State<ThemeSelectorWidget> {
             children: [
               Icon(
                 Icons.palette,
-                color: AppColors.primaryGreen,
+                color: AppColors.primary,
                 size: 24,
               ),
               SizedBox(width: 8),