fix: resolve OIDC session state issue and synchronize portal sessions

Details:
- Backend: Extract Kratos session cookies and propagate via SetCookies in AuthInfo.
- Backend: Include sessionJwt and token during OIDC flows in PasswordLogin.
- UserFront: Add _silentSessionRecovery in main.dart to recover session via cookies if localStorage token is missing.
- UserFront: Update AuthProxyService, AuthTokenStore, AuthNotifier to support silent recovery and immediate local state update before redirect.
- AdminFront/DevFront: Fix OIDC authority to point directly to Gateway proxy and add recovery/error UI components.

userfront/lib/core/notifiers/auth_notifier.dart

@@ -1,8 +1,15 @@
 import 'package:flutter/foundation.dart';
+import '../services/auth_token_store.dart';
 
 class AuthNotifier extends ChangeNotifier {
   static final AuthNotifier instance = AuthNotifier();
 
+  Future<void> onLoginSuccess(String token, {String? provider}) async {
+    AuthTokenStore.setToken(token, provider: provider);
+    AuthTokenStore.clearPendingProvider();
+    notifyListeners();
+  }
+
   void notify() {
     notifyListeners();
   }