i18n 대대적 변경

userfront/lib/features/auth/presentation/login_success_screen.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
+import 'package:userfront/i18n.dart';
 
 class LoginSuccessScreen extends StatelessWidget {
   const LoginSuccessScreen({super.key});
@@ -16,17 +17,17 @@ class LoginSuccessScreen extends StatelessWidget {
               const Icon(Icons.check_circle_outline, size: 80, color: Colors.green),
               const SizedBox(height: 24),
               Text(
-                "로그인 완료",
+                tr('ui.userfront.login_success.title', fallback: '로그인 완료'),
                 style: TextStyle(
                   fontSize: 32,
                   fontWeight: FontWeight.bold,
                 ),
               ),
               const SizedBox(height: 16),
-              const Text(
-                "성공적으로 로그인되었습니다.",
+              Text(
+                tr('msg.userfront.login_success.subtitle', fallback: '성공적으로 로그인되었습니다.'),
                 textAlign: TextAlign.center,
-                style: TextStyle(color: Colors.grey, fontSize: 16),
+                style: const TextStyle(color: Colors.grey, fontSize: 16),
               ),
               const SizedBox(height: 48),
               
@@ -36,7 +37,9 @@ class LoginSuccessScreen extends StatelessWidget {
                   context.push('/scan');
                 },
                 icon: const Icon(Icons.camera_alt, size: 28),
-                label: const Text("QR 인증 (카메라 켜기)"),
+                label: Text(
+                  tr('ui.userfront.login_success.qr', fallback: 'QR 인증 (카메라 켜기)'),
+                ),
                 style: FilledButton.styleFrom(
                   minimumSize: const Size.fromHeight(80), // 버튼 높이를 더 크게
                   backgroundColor: Colors.blue.shade700,
@@ -51,7 +54,13 @@ class LoginSuccessScreen extends StatelessWidget {
                 onPressed: () {
                   context.go('/');
                 },
-                child: const Text("나중에 하기 (대시보드로 이동)", style: TextStyle(color: Colors.grey)),
+                child: Text(
+                  tr(
+                    'ui.userfront.login_success.later',
+                    fallback: '나중에 하기 (대시보드로 이동)',
+                  ),
+                  style: const TextStyle(color: Colors.grey),
+                ),
               ),
             ],
           ),