Add reusable two-factor verification for login and money operations (#32)

frontend/app/lib/workspace/settings.dart

@@ -7,6 +7,7 @@ import 'package:provider/provider.dart';
 import 'package:sxchnge_wallet/sxchnge_wallet.dart';
 
 import '../providers/locale.dart';
+import '../security/settings.dart';
 
 import '../generated/i18n/app_localizations.dart';
 
@@ -105,19 +106,7 @@ class SettingsPage extends StatelessWidget {
                 ),
               ),
               const SizedBox(height: 16),
-              Card(
-                child: Padding(
-                  padding: const EdgeInsets.all(24),
-                  child: Column(
-                    crossAxisAlignment: CrossAxisAlignment.start,
-                    children: [
-                      Text(l.wSecurity, style: t.textTheme.titleLarge),
-                      const SizedBox(height: 12),
-                      Text(l.wSecurityBody),
-                    ],
-                  ),
-                ),
-              ),
+              const SecuritySettings(),
               const SizedBox(height: 20),
               TextButton(
                 onPressed: () => context.go('/'),