feat(auth): gestion reAuthRequired + suppression flux changement mot de passe manuel

- AuthStatusResult: nouveau champ reAuthRequired (ancien compte nécessitant UPDATE_PASSWORD)
- AuthBloc._onLoginRequested: si reAuthRequired → logout silencieux + re-déclenchement AppAuth
  automatique (Keycloak affiche l'écran de changement de mot de passe dans Chrome Custom Tab)
- AuthBloc._onStatusChecked: si reAuthRequired → logout + AuthUnauthenticated (redirection login)
- Remplacement du flux premierLoginComplet (boolean) par enum côté backend
- Suppression de AuthPasswordChangeRequired, AuthPasswordChanging, change_password_page.dart

lib/app/router/app_router.dart

@@ -68,13 +68,13 @@ class AppRouter {
             onboardingState: state.onboardingState,
             organisationId: state.organisationId ?? '',
             souscriptionId: state.souscriptionId,
+            typeOrganisation: state.typeOrganisation,
           );
         } else {
           return const LoginPage();
         }
       },
     ),
-    '/dashboard': (context) => const MainNavigationLayout(),
     '/login': (context) => const LoginPage(),
     '/about': (context) => const AboutPage(),
     '/help': (context) => const HelpSupportPage(),
@@ -85,10 +85,9 @@ class AppRouter {
     '/solidarity': (context) => const DemandesAidePageWrapper(),
     '/reports': (context) => const ReportsPageWrapper(),
     '/finances': (context) => const CotisationsPageWrapper(),
-    '/my-finances': (context) => const CotisationsPageWrapper(),
-    '/moderation': (context) => const AdhesionsPageWrapper(),
-    '/communication': (context) => const ConversationsPage(),
-    '/org-settings': (context) => const SystemSettingsPage(),
+    '/adhesions': (context) => const AdhesionsPageWrapper(),
+    '/messages': (context) => const ConversationsPage(),
+    '/settings': (context) => const SystemSettingsPage(),
     '/analytics': (context) {
       final authState = context.read<AuthBloc>().state;
       if (authState is AuthAuthenticated) {
@@ -102,12 +101,7 @@ class AppRouter {
       }
       return const LoginPage();
     },
-    '/security': (context) => const SystemSettingsPage(),
-    '/system-admin': (context) => const MainNavigationLayout(),
     '/global-users': (context) => const UserManagementPage(),
-    '/messages': (context) => const ConversationsPage(),
-    '/public-events': (context) => const EventsPageWrapper(),
-    '/contact': (context) => const HelpSupportPage(),
     '/approvals': (context) => const PendingApprovalsPage(),
     '/budgets': (context) => const BudgetsListPage(),
   };