i18n 대대적 변경

userfront/Dockerfile

@@ -7,7 +7,7 @@ COPY . .
 # Get dependencies and build for web
 RUN flutter pub get
 RUN touch .env
-RUN flutter build web --release --no-tree-shake-icons
+RUN flutter build web --release --no-tree-shake-icons --wasm
 
 # Stage 2: Serve with Nginx
 FROM nginx:alpine

userfront/lib/core/services/audit_service.dart

@@ -1,4 +1,5 @@
 import 'dart:convert';
+import 'package:flutter/foundation.dart';
 import 'package:http/http.dart' as http;
 import 'package:flutter_dotenv/flutter_dotenv.dart';
 
@@ -33,12 +34,14 @@ class AuditService {
       );
 
       if (response.statusCode >= 200 && response.statusCode < 300) {
-        print("Audit log sent successfully");
+        debugPrint('Audit log sent successfully');
       } else {
-        print("Failed to send audit log: ${response.statusCode} ${response.body}");
+        debugPrint(
+          'Failed to send audit log: ${response.statusCode} ${response.body}',
+        );
       }
     } catch (e) {
-      print("Error sending audit log: $e");
+      debugPrint('Error sending audit log: $e');
     }
   }
 }

userfront/lib/core/services/auth_proxy_service.dart

@@ -1,6 +1,7 @@
 import 'dart:convert';
 import 'package:http/http.dart' as http;
 import 'package:flutter_dotenv/flutter_dotenv.dart';
+import 'package:userfront/i18n.dart';
 import 'http_client.dart';
 import 'web_window.dart';
 import 'auth_token_store.dart';
@@ -30,13 +31,26 @@ class AuthProxyService {
     return drySend == true;
   }
 
+  static Exception _error(String key, String fallback, {String? detail}) {
+    return Exception(
+      tr(
+        key,
+        fallback: fallback,
+        params: detail != null ? {'error': detail} : null,
+      ),
+    );
+  }
+
   static Future<Map<String, dynamic>> fetchPasswordPolicy() async {
     final url = Uri.parse('$_baseUrl/api/v1/auth/password/policy');
     final response = await http.get(url);
     if (response.statusCode == 200) {
       return jsonDecode(response.body);
     } else {
-      throw Exception('Failed to fetch password policy');
+      throw _error(
+        'err.userfront.auth_proxy.password_policy_fetch',
+        '비밀번호 정책을 불러오지 못했습니다.',
+      );
     }
   }
 
@@ -52,7 +66,11 @@ class AuthProxyService {
       if (response.statusCode == 200) {
         return jsonDecode(response.body);
       }
-      throw Exception('Failed to load profile: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.profile_load',
+        '프로필을 불러오지 못했습니다: {{error}}',
+        detail: response.body,
+      );
     } finally {
       client.close();
     }
@@ -107,7 +125,11 @@ class AuthProxyService {
     if (response.statusCode == 200) {
       return jsonDecode(response.body);
     } else {
-      throw Exception('Failed to init login: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.login_init',
+        '로그인 초기화에 실패했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 
@@ -128,7 +150,11 @@ class AuthProxyService {
     if (response.statusCode == 400) {
       return jsonDecode(response.body);
     }
-    throw Exception('Polling failed: ${response.body}');
+    throw _error(
+      'err.userfront.auth_proxy.login_poll',
+      '로그인 상태 확인에 실패했습니다: {{error}}',
+      detail: response.body,
+    );
   }
 
   static Future<Map<String, dynamic>> verifyMagicLink(String token, {bool verifyOnly = false}) async {
@@ -146,7 +172,11 @@ class AuthProxyService {
     if (response.statusCode == 200) {
       return jsonDecode(response.body);
     } else {
-      throw Exception('Verification failed: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.verify_failed',
+        '검증에 실패했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 
@@ -176,7 +206,11 @@ class AuthProxyService {
     if (response.statusCode == 200) {
       return jsonDecode(response.body);
     } else {
-      throw Exception('Verification failed: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.verify_failed',
+        '검증에 실패했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 
@@ -198,7 +232,11 @@ class AuthProxyService {
     if (response.statusCode == 200) {
       return jsonDecode(response.body);
     } else {
-      throw Exception('Verification failed: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.verify_failed',
+        '검증에 실패했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 
@@ -225,7 +263,13 @@ class AuthProxyService {
       return data;
     } else {
       final errorBody = jsonDecode(response.body);
-      throw Exception(errorBody['error'] ?? 'Failed to login');
+      throw Exception(
+        errorBody['error'] ??
+            tr(
+              'err.userfront.auth_proxy.login_failed',
+              fallback: '로그인에 실패했습니다.',
+            ),
+      );
     }
   }
   static Future<Map<String, dynamic>> getConsentInfo(String consentChallenge) async {
@@ -239,7 +283,13 @@ class AuthProxyService {
       return jsonDecode(response.body);
     } else {
       final errorBody = jsonDecode(response.body);
-      throw Exception(errorBody['error'] ?? 'Failed to get consent info');
+      throw Exception(
+        errorBody['error'] ??
+            tr(
+              'err.userfront.auth_proxy.consent_fetch',
+              fallback: '동의 정보를 가져오지 못했습니다.',
+            ),
+      );
     }
   }
 
@@ -262,7 +312,13 @@ class AuthProxyService {
       return jsonDecode(response.body);
     } else {
       final errorBody = jsonDecode(response.body);
-      throw Exception(errorBody['error'] ?? 'Failed to accept consent');
+      throw Exception(
+        errorBody['error'] ??
+            tr(
+              'err.userfront.auth_proxy.consent_accept',
+              fallback: '동의 처리에 실패했습니다.',
+            ),
+      );
     }
   }
 
@@ -282,7 +338,13 @@ class AuthProxyService {
       return jsonDecode(response.body);
     } else {
       final errorBody = jsonDecode(response.body);
-      throw Exception(errorBody['error'] ?? 'Failed to reject consent');
+      throw Exception(
+        errorBody['error'] ??
+            tr(
+              'err.userfront.auth_proxy.consent_reject',
+              fallback: '동의 거부에 실패했습니다.',
+            ),
+      );
     }
   }
 
@@ -311,7 +373,13 @@ class AuthProxyService {
         return jsonDecode(response.body);
       } else {
         final errorBody = jsonDecode(response.body);
-        throw Exception(errorBody['error'] ?? 'Failed to accept OIDC login');
+        throw Exception(
+          errorBody['error'] ??
+              tr(
+                'err.userfront.auth_proxy.oidc_accept',
+                fallback: 'OIDC 로그인 승인에 실패했습니다.',
+              ),
+        );
       }
     } finally {
       client.close();
@@ -334,7 +402,13 @@ class AuthProxyService {
       return jsonDecode(response.body);
     } else {
       final errorBody = jsonDecode(response.body);
-      throw Exception(errorBody['error'] ?? 'Failed to initiate password reset');
+      throw Exception(
+        errorBody['error'] ??
+            tr(
+              'err.userfront.auth_proxy.password_reset_init',
+              fallback: '비밀번호 재설정을 시작하지 못했습니다.',
+            ),
+      );
     }
   }
 
@@ -361,7 +435,13 @@ class AuthProxyService {
       return jsonDecode(response.body);
     } else {
       final errorBody = jsonDecode(response.body);
-      throw Exception(errorBody['error'] ?? 'Failed to complete password reset');
+      throw Exception(
+        errorBody['error'] ??
+            tr(
+              'err.userfront.auth_proxy.password_reset_complete',
+              fallback: '비밀번호 재설정에 실패했습니다.',
+            ),
+      );
     }
   }
 
@@ -377,7 +457,11 @@ class AuthProxyService {
     );
 
     if (response.statusCode != 200) {
-      throw Exception('Failed to send SMS: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.sms_send',
+        'SMS 전송에 실패했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 
@@ -396,7 +480,11 @@ class AuthProxyService {
     if (response.statusCode == 200) {
       return jsonDecode(response.body);
     } else {
-      throw Exception('Failed to verify code: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.code_verify',
+        '인증 코드 확인에 실패했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 
@@ -410,7 +498,11 @@ class AuthProxyService {
     if (response.statusCode == 200) {
       return jsonDecode(response.body);
     } else {
-      throw Exception('Failed to init QR login: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.qr_init',
+        'QR 로그인을 시작하지 못했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 
@@ -428,7 +520,11 @@ class AuthProxyService {
     if (response.statusCode == 400) {
       return jsonDecode(response.body);
     }
-    throw Exception('QR Polling failed: ${response.body}');
+    throw _error(
+      'err.userfront.auth_proxy.qr_poll',
+      'QR 상태 확인에 실패했습니다: {{error}}',
+      detail: response.body,
+    );
   }
 
   static Future<void> approveQrLogin(
@@ -462,7 +558,11 @@ class AuthProxyService {
             ));
 
       if (response.statusCode != 200) {
-        throw Exception('QR Approval failed: ${response.body}');
+        throw _error(
+          'err.userfront.auth_proxy.qr_approve',
+          'QR 승인에 실패했습니다: {{error}}',
+          detail: response.body,
+        );
       }
     } finally {
       client?.close();
@@ -509,7 +609,11 @@ class AuthProxyService {
     );
 
     if (response.statusCode != 200) {
-      throw Exception('Failed to create user: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.user_create',
+        '사용자 생성에 실패했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 
@@ -531,7 +635,11 @@ class AuthProxyService {
       final data = jsonDecode(response.body);
       return data['users'] ?? [];
     } else {
-      throw Exception('Failed to list users: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.user_list',
+        '사용자 목록 조회에 실패했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 
@@ -548,7 +656,11 @@ class AuthProxyService {
     );
 
     if (response.statusCode != 200) {
-      throw Exception('Failed to delete user: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.user_delete',
+        '사용자 삭제에 실패했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 
@@ -566,7 +678,11 @@ class AuthProxyService {
     );
 
     if (response.statusCode != 200) {
-      throw Exception('Failed to update status: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.user_status_update',
+        '상태 업데이트에 실패했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 
@@ -595,7 +711,11 @@ class AuthProxyService {
     );
 
     if (response.statusCode != 200) {
-      throw Exception('Failed to update user: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.user_update',
+        '사용자 수정에 실패했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 
@@ -622,7 +742,10 @@ class AuthProxyService {
         final data = jsonDecode(response.body);
         return data['items'] ?? [];
       } else {
-        throw Exception('연동된 앱 목록을 불러오지 못했습니다.');
+        throw _error(
+          'err.userfront.auth_proxy.linked_apps_load',
+          '연동된 앱 목록을 불러오지 못했습니다.',
+        );
       }
     } finally {
       client.close();
@@ -650,7 +773,13 @@ class AuthProxyService {
 
       if (response.statusCode != 200) {
         final errorBody = jsonDecode(response.body);
-        throw Exception(errorBody['error'] ?? '연동 해지에 실패했습니다.');
+        throw Exception(
+          errorBody['error'] ??
+              tr(
+                'err.userfront.auth_proxy.linked_app_revoke',
+                fallback: '연동 해지에 실패했습니다.',
+              ),
+        );
       }
     } finally {
       client.close();
@@ -688,7 +817,6 @@ class AuthProxyService {
   }
 
   static int _clientLogFailureCount = 0;
-  static DateTime? _clientLogLastFailureAt;
   static DateTime? _clientLogOpenUntil;
 
   static bool _canSendClientLog() {
@@ -702,7 +830,6 @@ class AuthProxyService {
 
   static void _recordClientLogFailure() {
     _clientLogFailureCount += 1;
-    _clientLogLastFailureAt = DateTime.now();
     if (_clientLogFailureCount >= 3) {
       _clientLogOpenUntil = DateTime.now().add(const Duration(minutes: 1));
       _clientLogFailureCount = 0;
@@ -711,7 +838,6 @@ class AuthProxyService {
 
   static void _recordClientLogSuccess() {
     _clientLogFailureCount = 0;
-    _clientLogLastFailureAt = null;
     _clientLogOpenUntil = null;
   }
 
@@ -743,7 +869,11 @@ class AuthProxyService {
     );
 
     if (response.statusCode != 200) {
-      throw Exception('Failed to send code: ${response.body}');
+      throw _error(
+        'err.userfront.auth_proxy.phone_code_send',
+        '인증 코드 전송에 실패했습니다: {{error}}',
+        detail: response.body,
+      );
     }
   }
 

userfront/lib/core/services/auth_token_store_web.dart

@@ -1,3 +1,5 @@
+// ignore_for_file: avoid_web_libraries_in_flutter, deprecated_member_use
+
 import 'dart:html' as html;
 
 class AuthTokenStore {

userfront/lib/core/services/web_auth_integration_stub.dart

@@ -1,6 +1,8 @@
+import 'package:flutter/foundation.dart';
+
 void implSendLoginSuccess(String token) {
   // No-op on non-web platforms
-  print("Not on web: Login Success with token: $token");
+  debugPrint('Not on web: Login Success with token: $token');
 }
 
 bool implIsPopup() {

userfront/lib/core/services/web_auth_integration_web.dart

@@ -1,5 +1,8 @@
-import 'dart:html' as html;
+// ignore_for_file: avoid_web_libraries_in_flutter, deprecated_member_use
+
 import 'dart:async';
+import 'dart:html' as html;
+import 'package:flutter/foundation.dart';
 
 void implSendLoginSuccess(String token) {
   final message = {'type': 'LOGIN_SUCCESS', 'token': token};
@@ -7,9 +10,9 @@ void implSendLoginSuccess(String token) {
   if (html.window.opener != null) {
     try {
       html.window.opener!.postMessage(message, '*');
-      print("Sent login success message to opener");
+      debugPrint('Sent login success message to opener');
     } catch (e) {
-      print("Failed to postMessage: $e");
+      debugPrint('Failed to postMessage: $e');
     }
     
     // Close the popup after a short delay to ensure message sending
@@ -18,7 +21,7 @@ void implSendLoginSuccess(String token) {
     });
   } else {
      // Should not happen given isPopup check, but as fallback:
-     print("No opener found during popup flow.");
+    debugPrint('No opener found during popup flow.');
   }
 }
 

userfront/lib/core/services/web_window_web.dart

@@ -1,3 +1,5 @@
+// ignore_for_file: avoid_web_libraries_in_flutter, deprecated_member_use
+
 import 'dart:html' as html;
 
 class WebWindow {

userfront/lib/features/admin/presentation/user_management_screen.dart

@@ -345,10 +345,9 @@ class _UserManagementScreenState extends State<UserManagementScreen> with Single
               ? const Center(child: Text("No users found.")) 
               : ListView.separated(
                   itemCount: _users.length,
-                  separatorBuilder: (_, __) => const Divider(),
+                  separatorBuilder: (context, index) => const Divider(),
                   itemBuilder: (context, index) {
                     final user = _users[index];
-                    final userObj = user['user'] ?? {}; // 응답 구조가 케이스마다 다를 수 있음
                     // 일부 응답은 최상위 또는 user 하위에 필드를 포함합니다.
                     
                     final loginIDs = (user['loginIds'] as List?) ?? [];

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

@@ -13,12 +13,6 @@ class ConsentScreen extends StatefulWidget {
 }
 
 class _ConsentScreenState extends State<ConsentScreen> {
-  static const _ink = Color(0xFF1A1F2C);
-  static const _surface = Colors.white;
-  static const _border = Color(0xFFE5E7EB);
-  static const _subtle = Color(0xFFF7F8FA);
-  static const _accent = Color(0xFF2563EB);
-
   Map<String, dynamic>? _consentInfo;
   bool _isLoading = true;
   bool _isSubmitting = false;
@@ -28,7 +22,7 @@ class _ConsentScreenState extends State<ConsentScreen> {
   final Set<String> _selectedScopes = {};
 
   // 권한별 설명 매핑 (동적으로 업데이트됨)
-  Map<String, String> _scopeDescriptions = {
+  final Map<String, String> _scopeDescriptions = {
     'openid': 'OpenID 인증 정보 (로그인 상태 확인)',
     'profile': '기본 프로필 정보 (이름, 사용자 식별자)',
     'email': '이메일 주소 (계정 식별 및 알림 용도)',
@@ -37,7 +31,7 @@ class _ConsentScreenState extends State<ConsentScreen> {
   };
 
   // 필수 권한 목록 (동적으로 업데이트됨)
-  Set<String> _mandatoryScopes = {'openid'};
+  final Set<String> _mandatoryScopes = {'openid'};
 
   @override
   void initState() {
@@ -333,7 +327,7 @@ class _ConsentScreenState extends State<ConsentScreen> {
                     contentPadding: EdgeInsets.zero,
                     activeColor: Theme.of(context).primaryColor,
                   );
-                }).toList(),
+                }),
                 const Divider(),
                 const SizedBox(height: 32),
 

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

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import '../../../core/constants/error_whitelist.dart';
 import '../../../core/services/auth_proxy_service.dart';
+import 'package:userfront/i18n.dart';
 
 class ErrorScreen extends StatelessWidget {
   final String? errorId;
@@ -23,19 +24,38 @@ class ErrorScreen extends StatelessWidget {
     final isProd = isProdOverride ?? AuthProxyService.isProdEnv;
     final normalizedCode = (errorCode ?? '').trim();
     final hasCode = normalizedCode.isNotEmpty;
-    final whitelistMessage = errorWhitelistMessages[normalizedCode];
-    final isWhitelisted = whitelistMessage != null;
+    final whitelistFallback = errorWhitelistMessages[normalizedCode];
+    final isWhitelisted = whitelistFallback != null;
     final errorType = isProd
         ? (isWhitelisted && hasCode ? normalizedCode : 'unknown_error')
         : (hasCode ? normalizedCode : 'unknown_error');
     final title = isProd
-        ? '인증 과정에서 오류가 발생했습니다'
-        : (hasCode ? '오류: $normalizedCode' : '오류가 발생했습니다');
+        ? tr('msg.userfront.error.title', fallback: '인증 과정에서 오류가 발생했습니다')
+        : (hasCode
+            ? tr(
+                'msg.userfront.error.title_with_code',
+                fallback: '오류: {{code}}',
+                params: {'code': normalizedCode},
+              )
+            : tr('msg.userfront.error.title_generic', fallback: '오류가 발생했습니다'));
     final detail = isProd
-        ? (isWhitelisted ? whitelistMessage! : '에러가 계속되면 관리자에게 문의해주세요')
+        ? (isWhitelisted
+            ? tr(
+                'msg.userfront.error.whitelist.$normalizedCode',
+                fallback: whitelistFallback,
+              )
+            : tr(
+                'msg.userfront.error.detail_contact',
+                fallback: '에러가 계속되면 관리자에게 문의해주세요',
+              ))
         : ((description?.isNotEmpty == true)
             ? description!
-            : (hasCode ? '오류가 발생했습니다.' : '요청을 처리하는 중 문제가 발생했습니다.'));
+            : (hasCode
+                ? tr('msg.userfront.error.detail_generic', fallback: '오류가 발생했습니다.')
+                : tr(
+                    'msg.userfront.error.detail_request',
+                    fallback: '요청을 처리하는 중 문제가 발생했습니다.',
+                  )));
 
     return Scaffold(
       backgroundColor: const Color(0xFFF7F8FA),
@@ -72,7 +92,11 @@ class ErrorScreen extends StatelessWidget {
                   ),
                   const SizedBox(height: 12),
                   Text(
-                    '오류 종류: $errorType',
+                    tr(
+                      'msg.userfront.error.type',
+                      fallback: '오류 종류: {{type}}',
+                      params: {'type': errorType},
+                    ),
                     style: theme.textTheme.bodySmall?.copyWith(
                       color: const Color(0xFF6B7280),
                     ),
@@ -80,7 +104,11 @@ class ErrorScreen extends StatelessWidget {
                   if (errorId != null && errorId!.isNotEmpty) ...[
                     const SizedBox(height: 12),
                     Text(
-                      '오류 ID: $errorId',
+                      tr(
+                        'msg.userfront.error.id',
+                        fallback: '오류 ID: {{id}}',
+                        params: {'id': errorId!},
+                      ),
                       style: theme.textTheme.bodySmall?.copyWith(
                         color: const Color(0xFF6B7280),
                       ),
@@ -101,7 +129,9 @@ class ErrorScreen extends StatelessWidget {
                             borderRadius: BorderRadius.circular(10),
                           ),
                         ),
-                        child: const Text('로그인으로 이동'),
+                        child: Text(
+                          tr('ui.userfront.error.go_login', fallback: '로그인으로 이동'),
+                        ),
                       ),
                       OutlinedButton(
                         onPressed: () => context.go('/'),
@@ -113,7 +143,9 @@ class ErrorScreen extends StatelessWidget {
                             borderRadius: BorderRadius.circular(10),
                           ),
                         ),
-                        child: const Text('홈으로 이동'),
+                        child: Text(
+                          tr('ui.userfront.error.go_home', fallback: '홈으로 이동'),
+                        ),
                       ),
                     ],
                   ),

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

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import '../../../core/services/auth_proxy_service.dart';
+import 'package:userfront/i18n.dart';
 
 class ForgotPasswordScreen extends StatefulWidget {
   const ForgotPasswordScreen({super.key});
@@ -22,7 +23,12 @@ class _ForgotPasswordScreenState extends State<ForgotPasswordScreen> {
   Future<void> _handlePasswordReset() async {
     final input = _loginIdController.text.trim();
     if (input.isEmpty) {
-      _showError("이메일 또는 휴대폰 번호를 입력해주세요.");
+      _showError(
+        tr(
+          'msg.userfront.forgot.input_required',
+          fallback: '이메일 또는 휴대폰 번호를 입력해주세요.',
+        ),
+      );
       return;
     }
 
@@ -41,8 +47,13 @@ class _ForgotPasswordScreenState extends State<ForgotPasswordScreen> {
       await AuthProxyService.initiatePasswordReset(loginId, drySend: _drySendEnabled);
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(
-            content: Text("비밀번호 재설정 링크가 전송되었습니다. 이메일 또는 SMS를 확인해주세요."),
+          SnackBar(
+            content: Text(
+              tr(
+                'msg.userfront.forgot.sent',
+                fallback: '비밀번호 재설정 링크가 전송되었습니다. 이메일 또는 SMS를 확인해주세요.',
+              ),
+            ),
             backgroundColor: Colors.green,
           ),
         );
@@ -50,7 +61,13 @@ class _ForgotPasswordScreenState extends State<ForgotPasswordScreen> {
       }
     } catch (e) {
       if (mounted) {
-        _showError("전송에 실패했습니다: ${e.toString()}");
+        _showError(
+          tr(
+            'msg.userfront.forgot.error',
+            fallback: '전송에 실패했습니다: {{error}}',
+            params: {'error': e.toString()},
+          ),
+        );
       }
     } finally {
       if (mounted) {
@@ -77,7 +94,7 @@ class _ForgotPasswordScreenState extends State<ForgotPasswordScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: const Text("비밀번호 재설정"),
+        title: Text(tr('ui.userfront.forgot.title', fallback: '비밀번호 재설정')),
         centerTitle: true,
       ),
       body: Center(
@@ -89,7 +106,7 @@ class _ForgotPasswordScreenState extends State<ForgotPasswordScreen> {
             crossAxisAlignment: CrossAxisAlignment.stretch,
             children: [
               Text(
-                "비밀번호를 잊으셨나요?",
+                tr('ui.userfront.forgot.heading', fallback: '비밀번호를 잊으셨나요?'),
                 style: TextStyle(
                   fontSize: 28,
                   fontWeight: FontWeight.bold,
@@ -106,13 +123,16 @@ class _ForgotPasswordScreenState extends State<ForgotPasswordScreen> {
                     border: Border.all(color: const Color(0xFFFFC107)),
                   ),
                   child: Row(
-                    children: const [
-                      Icon(Icons.warning_amber_rounded, color: Color(0xFF8A6D3B)),
-                      SizedBox(width: 8),
+                    children: [
+                      const Icon(Icons.warning_amber_rounded, color: Color(0xFF8A6D3B)),
+                      const SizedBox(width: 8),
                       Expanded(
                         child: Text(
-                          "drySend 모드: 실제 이메일/SMS는 발송되지 않습니다.",
-                          style: TextStyle(color: Color(0xFF8A6D3B), fontSize: 12),
+                          tr(
+                            'msg.userfront.forgot.dry_send',
+                            fallback: 'drySend 모드: 실제 이메일/SMS는 발송되지 않습니다.',
+                          ),
+                          style: const TextStyle(color: Color(0xFF8A6D3B), fontSize: 12),
                         ),
                       ),
                     ],
@@ -120,18 +140,25 @@ class _ForgotPasswordScreenState extends State<ForgotPasswordScreen> {
                 ),
               ],
               const SizedBox(height: 16),
-              const Text(
-                "계정과 연결된 이메일 주소 또는 휴대폰 번호를 입력하시면, 비밀번호를 재설정할 수 있는 링크를 보내드립니다.",
+              Text(
+                tr(
+                  'msg.userfront.forgot.description',
+                  fallback:
+                      '계정과 연결된 이메일 주소 또는 휴대폰 번호를 입력하시면, 비밀번호를 재설정할 수 있는 링크를 보내드립니다.',
+                ),
                 textAlign: TextAlign.center,
-                style: TextStyle(color: Colors.grey),
+                style: const TextStyle(color: Colors.grey),
               ),
               const SizedBox(height: 40),
               TextField(
                 controller: _loginIdController,
-                decoration: const InputDecoration(
-                  labelText: "이메일 또는 휴대폰 번호",
-                  border: OutlineInputBorder(),
-                  prefixIcon: Icon(Icons.person_outline),
+                decoration: InputDecoration(
+                  labelText: tr(
+                    'ui.userfront.forgot.input_label',
+                    fallback: '이메일 또는 휴대폰 번호',
+                  ),
+                  border: const OutlineInputBorder(),
+                  prefixIcon: const Icon(Icons.person_outline),
                 ),
                 onSubmitted: (_) => _handlePasswordReset(),
               ),
@@ -147,7 +174,12 @@ class _ForgotPasswordScreenState extends State<ForgotPasswordScreen> {
                         width: 20,
                         child: CircularProgressIndicator(strokeWidth: 2, color: Colors.white),
                       )
-                    : const Text("재설정 링크 전송"),
+                    : Text(
+                        tr(
+                          'ui.userfront.forgot.submit',
+                          fallback: '재설정 링크 전송',
+                        ),
+                      ),
               ),
             ],
           ),

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

@@ -5,6 +5,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 import 'package:url_launcher/url_launcher_string.dart';
 import 'package:qr_flutter/qr_flutter.dart';
+import 'package:userfront/i18n.dart';
 import '../../../core/services/web_auth_integration.dart';
 import '../../../core/services/auth_proxy_service.dart';
 import '../../../core/services/auth_token_store.dart';
@@ -51,10 +52,18 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
   bool _verificationOnly = false;
   bool _verificationApproved = false;
   String _verificationMessage = '';
-  String _verificationTitle = '승인 완료';
-  String _verificationPageTitle = '로그인 승인';
-  String _verificationActionLabel = '확인';
-  String _verificationActionPath = '/';
+  String _verificationTitle = tr(
+    'ui.userfront.login.verification.title',
+    fallback: '승인 완료',
+  );
+  String _verificationPageTitle = tr(
+    'ui.userfront.login.verification.page_title',
+    fallback: '로그인 승인',
+  );
+  String _verificationActionLabel = tr(
+    'ui.userfront.login.verification.action_label',
+    fallback: '확인',
+  );
   Timer? _verificationRedirectTimer;
   bool _noticeHandled = false;
   bool _drySendEnabled = false;
@@ -92,7 +101,12 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
 
       if (!_noticeHandled && notice == 'qr_login_required') {
         _noticeHandled = true;
-        _showInfo('로그인 한 상태여야 QR 스캔으로 로그인 할 수 있습니다');
+        _showInfo(
+          tr(
+            'msg.userfront.login.qr_login_required',
+            fallback: '로그인 한 상태여야 QR 스캔으로 로그인 할 수 있습니다',
+          ),
+        );
       }
 
       if (!_verificationOnly) {
@@ -125,7 +139,15 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
       }
     } catch (e) {
       if (!silent) {
-        _showError("로그인 확인 실패: ${e.toString().replaceFirst("Exception: ", "")}");
+        _showError(
+          tr(
+            'msg.userfront.login.cookie_check_failed',
+            fallback: '로그인 확인 실패: {{error}}',
+            params: {
+              'error': e.toString().replaceFirst('Exception: ', ''),
+            },
+          ),
+        );
       }
     }
   }
@@ -294,7 +316,13 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
         _startCountdown();
       }
     } catch (e) {
-      _showError("Failed to init QR: $e");
+      _showError(
+        tr(
+          'msg.userfront.login.qr_init_failed',
+          fallback: 'QR 초기화에 실패했습니다: {{error}}',
+          params: {'error': e.toString()},
+        ),
+      );
       if (mounted) setState(() => _isQrLoading = false);
     }
   }
@@ -346,7 +374,12 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
         if (res['error'] == 'expired_token') {
           timer.cancel();
           _qrCountdownTimer?.cancel();
-          _showError("QR 세션이 만료되었습니다.");
+          _showError(
+            tr(
+              'msg.userfront.login.qr_expired',
+              fallback: 'QR 세션이 만료되었습니다.',
+            ),
+          );
           return;
         }
 
@@ -357,7 +390,12 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
           if (token is String && token.isNotEmpty) {
             _completeLoginFromToken(token);
           } else {
-            _showError("로그인 토큰을 확인할 수 없습니다.");
+            _showError(
+              tr(
+                'msg.userfront.login.token_missing',
+                fallback: '로그인 토큰을 확인할 수 없습니다.',
+              ),
+            );
           }
         }
       } catch (e) {
@@ -423,21 +461,35 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
 
   void _markVerificationApproved(
     String message, {
-    String title = '승인 완료',
-    String pageTitle = '로그인 승인',
-    String actionLabel = '확인',
+    String? title,
+    String? pageTitle,
+    String? actionLabel,
     String actionPath = '/',
     bool autoRedirect = false,
     Duration redirectDelay = const Duration(seconds: 2),
   }) {
     if (!mounted) return;
+    final resolvedTitle = title ??
+        tr(
+          'ui.userfront.login.verification.title',
+          fallback: '승인 완료',
+        );
+    final resolvedPageTitle = pageTitle ??
+        tr(
+          'ui.userfront.login.verification.page_title',
+          fallback: '로그인 승인',
+        );
+    final resolvedActionLabel = actionLabel ??
+        tr(
+          'ui.userfront.login.verification.action_label',
+          fallback: '확인',
+        );
     setState(() {
       _verificationApproved = true;
       _verificationMessage = message;
-      _verificationTitle = title;
-      _verificationPageTitle = pageTitle;
-      _verificationActionLabel = actionLabel;
-      _verificationActionPath = actionPath;
+      _verificationTitle = resolvedTitle;
+      _verificationPageTitle = resolvedPageTitle;
+      _verificationActionLabel = resolvedActionLabel;
     });
     _verificationRedirectTimer?.cancel();
     if (autoRedirect) {
@@ -463,7 +515,12 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
             ),
             const SizedBox(height: 12),
             Text(
-              _verificationMessage.isEmpty ? '로그인 승인에 성공했습니다.' : _verificationMessage,
+              _verificationMessage.isEmpty
+                  ? tr(
+                      'msg.userfront.login.verification.success',
+                      fallback: '로그인 승인에 성공했습니다.',
+                    )
+                  : _verificationMessage,
               textAlign: TextAlign.center,
               style: const TextStyle(color: Colors.black54),
             ),
@@ -490,6 +547,14 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
 
   Future<void> _verifyToken(String token) async {
     debugPrint("[Auth] Starting verification for token: $token");
+    final approvedMessage = tr(
+      'msg.userfront.login.verification.approved',
+      fallback: '승인되었습니다. 로그인은 요청하신 창에서 완료됩니다.',
+    );
+    final localSessionMessage = tr(
+      'msg.userfront.login.verification.approved_local',
+      fallback: '승인 되었습니다. 이 기기는 로그인되어 있는 상태입니다. 원격 창도 로그인이 될 예정입니다',
+    );
     try {
       // Use Backend to verify the token (Backend-Driven Flow)
       final res = await AuthProxyService.verifyMagicLink(
@@ -505,7 +570,7 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
       if (status == 'approved' || (jwt == null && _verificationOnly)) {
         if (mounted) {
           _markVerificationApproved(
-            "승인되었습니다. 로그인은 요청하신 창에서 완료됩니다.",
+            approvedMessage,
             actionPath: actionPath,
           );
         }
@@ -515,13 +580,13 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
       if (jwt is String && jwt.isNotEmpty) {
         if (hasLocalSession) {
           _markVerificationApproved(
-            "승인 되었습니다. 이 기기는 로그인되어 있는 상태입니다. 원격 창도 로그인이 될 예정입니다",
+            localSessionMessage,
             actionPath: actionPath,
           );
           return;
         }
         _markVerificationApproved(
-          "승인되었습니다. 로그인은 요청하신 창에서 완료됩니다.",
+          approvedMessage,
           actionPath: actionPath,
         );
         return;
@@ -529,14 +594,20 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
 
       if (mounted) {
         _markVerificationApproved(
-          "승인되었습니다. 로그인은 요청하신 창에서 완료됩니다.",
+          approvedMessage,
           actionPath: actionPath,
         );
       }
     } catch (e) {
       debugPrint("[Auth] Verification FAILED for token: $token. Error: $e");
       if (mounted) {
-        _showError("Verification failed: $e");
+        _showError(
+          tr(
+            'msg.userfront.login.verification_failed',
+            fallback: '승인 처리에 실패했습니다: {{error}}',
+            params: {'error': e.toString()},
+          ),
+        );
       }
     }
   }
@@ -544,6 +615,18 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
   Future<void> _verifyLoginCode(String loginId, String code, {String? pendingRef}) async {
     final sanitizedLoginId = loginId.replaceAll(' ', '+');
     debugPrint("[Auth] Starting code verification for loginId: $sanitizedLoginId");
+    final approvedMessage = tr(
+      'msg.userfront.login.verification.approved',
+      fallback: '승인되었습니다. 로그인은 요청하신 창에서 완료됩니다.',
+    );
+    final localSessionMessage = tr(
+      'msg.userfront.login.verification.approved_local',
+      fallback: '승인 되었습니다. 이 기기는 로그인되어 있는 상태입니다. 원격 창도 로그인이 될 예정입니다',
+    );
+    final linkLoginMessage = tr(
+      'msg.userfront.login.link.approved',
+      fallback: '링크로 로그인 되었습니다. 잠시 후 로그인 화면으로 이동합니다.',
+    );
     try {
       final res = await AuthProxyService.verifyLoginCode(
         sanitizedLoginId,
@@ -560,7 +643,7 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
       if (jwt == null && status == 'approved') {
         if (mounted) {
           _markVerificationApproved(
-            "승인되었습니다. 로그인은 요청하신 창에서 완료됩니다.",
+            approvedMessage,
             actionPath: actionPath,
           );
         }
@@ -570,22 +653,32 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
       if (jwt is String && jwt.isNotEmpty) {
         if (hasLocalSession) {
           _markVerificationApproved(
-            "승인 되었습니다. 이 기기는 로그인되어 있는 상태입니다. 원격 창도 로그인이 될 예정입니다",
+            localSessionMessage,
             actionPath: actionPath,
           );
           return;
         }
         if (_verificationOnly) {
           _markVerificationApproved(
-            "승인되었습니다. 로그인은 요청하신 창에서 완료됩니다.",
+            approvedMessage,
             actionPath: actionPath,
           );
           return;
         }
-        _markVerificationApproved("링크로 로그인 되었습니다. 잠시 후 로그인 화면으로 이동합니다.",
-          title: '링크 로그인 완료',
-          pageTitle: '링크 로그인',
-          actionLabel: '로그인 화면으로 이동',
+        _markVerificationApproved(
+          linkLoginMessage,
+          title: tr(
+            'ui.userfront.login.link.title',
+            fallback: '링크 로그인 완료',
+          ),
+          pageTitle: tr(
+            'ui.userfront.login.link.page_title',
+            fallback: '링크 로그인',
+          ),
+          actionLabel: tr(
+            'ui.userfront.login.link.action_label',
+            fallback: '로그인 화면으로 이동',
+          ),
           actionPath: '/signin',
           autoRedirect: true,
         );
@@ -594,14 +687,20 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
 
       if (_verificationOnly && mounted) {
         _markVerificationApproved(
-          "승인되었습니다. 로그인은 요청하신 창에서 완료됩니다.",
+          approvedMessage,
           actionPath: actionPath,
         );
       }
     } catch (e) {
       debugPrint("[Auth] Code verification FAILED for loginId: $sanitizedLoginId. Error: $e");
       if (mounted) {
-        _showError("Verification failed: $e");
+        _showError(
+          tr(
+            'msg.userfront.login.verification_failed',
+            fallback: '승인 처리에 실패했습니다: {{error}}',
+            params: {'error': e.toString()},
+          ),
+        );
       }
     }
   }
@@ -610,6 +709,14 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
     final sanitized = shortCode.trim().toUpperCase();
     if (sanitized.isEmpty) return;
     debugPrint("[Auth] Starting short code verification for code: $sanitized");
+    final approvedMessage = tr(
+      'msg.userfront.login.verification.approved',
+      fallback: '승인되었습니다. 로그인은 요청하신 창에서 완료됩니다.',
+    );
+    final localSessionMessage = tr(
+      'msg.userfront.login.verification.approved_local',
+      fallback: '승인 되었습니다. 이 기기는 로그인되어 있는 상태입니다. 원격 창도 로그인이 될 예정입니다',
+    );
     try {
       final res = await AuthProxyService.verifyLoginShortCode(
         sanitized,
@@ -624,7 +731,7 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
       if (jwt == null && status == 'approved') {
         if (mounted) {
           _markVerificationApproved(
-            "승인되었습니다. 로그인은 요청하신 창에서 완료됩니다.",
+            approvedMessage,
             actionPath: actionPath,
           );
         }
@@ -634,14 +741,14 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
       if (jwt is String && jwt.isNotEmpty) {
         if (hasLocalSession) {
           _markVerificationApproved(
-            "승인 되었습니다. 이 기기는 로그인되어 있는 상태입니다. 원격 창도 로그인이 될 예정입니다",
+            localSessionMessage,
             actionPath: actionPath,
           );
           return;
         }
         if (_verificationOnly) {
           _markVerificationApproved(
-            "승인되었습니다. 로그인은 요청하신 창에서 완료됩니다.",
+            approvedMessage,
             actionPath: actionPath,
           );
           return;
@@ -652,14 +759,20 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
 
       if (_verificationOnly && mounted) {
         _markVerificationApproved(
-          "승인되었습니다. 로그인은 요청하신 창에서 완료됩니다.",
+          approvedMessage,
           actionPath: actionPath,
         );
       }
     } catch (e) {
       debugPrint("[Auth] Short code verification FAILED. Error: $e");
       if (mounted) {
-        _showError("Verification failed: $e");
+        _showError(
+          tr(
+            'msg.userfront.login.verification_failed',
+            fallback: '승인 처리에 실패했습니다: {{error}}',
+            params: {'error': e.toString()},
+          ),
+        );
       }
     }
   }
@@ -682,7 +795,12 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
     final input = _passwordLoginIdController.text.trim();
     final password = _passwordController.text.trim();
     if (input.isEmpty || password.isEmpty) {
-      _showError("이메일(또는 전화번호)와 비밀번호를 모두 입력해주세요.");
+      _showError(
+        tr(
+          'msg.userfront.login.password.missing_credentials',
+          fallback: '이메일(또는 전화번호)와 비밀번호를 모두 입력해주세요.',
+        ),
+      );
       return;
     }
 
@@ -721,7 +839,15 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
       if (e.toString().contains("User not registered")) {
         _showUnregisteredDialog();
       } else {
-        _showError("로그인 실패: ${e.toString().replaceFirst("Exception: ", "")}");
+        _showError(
+          tr(
+            'msg.userfront.login.password.failed',
+            fallback: '로그인 실패: {{error}}',
+            params: {
+              'error': e.toString().replaceFirst('Exception: ', ''),
+            },
+          ),
+        );
       }
     }
   }
@@ -746,7 +872,13 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
       if (e.toString().contains("User not registered")) {
         _showUnregisteredDialog();
       } else {
-        _showError("오류: $e");
+        _showError(
+          tr(
+            'msg.userfront.login.link_failed',
+            fallback: '오류: {{error}}',
+            params: {'error': e.toString()},
+          ),
+        );
       }
     }
   }
@@ -782,9 +914,17 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
         });
         Navigator.of(context).pop();
 
-        _showInfo(isEmail
-            ? "입력하신 이메일로 로그인 링크를 보냈습니다."
-            : "입력하신 번호로 로그인 링크를 보냈습니다.");
+        _showInfo(
+          isEmail
+              ? tr(
+                  'msg.userfront.login.link_sent_email',
+                  fallback: '입력하신 이메일로 로그인 링크를 보냈습니다.',
+                )
+              : tr(
+                  'msg.userfront.login.link_sent_phone',
+                  fallback: '입력하신 번호로 로그인 링크를 보냈습니다.',
+                ),
+        );
 
         final initialInterval = (interval is int && interval > 0)
             ? Duration(seconds: interval)
@@ -806,7 +946,13 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
       if (e.toString().contains("User not registered")) {
         _showUnregisteredDialog();
       } else {
-        _showError("전송 실패: $e");
+        _showError(
+          tr(
+            'msg.userfront.login.link_send_failed',
+            fallback: '전송 실패: {{error}}',
+            params: {'error': e.toString()},
+          ),
+        );
       }
     }
   }
@@ -842,7 +988,12 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
         if (result['error'] == 'expired_token') {
           if (mounted) {
             Navigator.of(context).pop();
-            _showError("Login timed out.");
+            _showError(
+              tr(
+                'msg.userfront.login.link_timeout',
+                fallback: '로그인 요청 시간이 초과되었습니다.',
+              ),
+            );
           }
           return;
         }
@@ -862,7 +1013,12 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
           if (mounted && Navigator.canPop(context)) {
             Navigator.of(context).pop();
           }
-          _showError("로그인 토큰을 확인할 수 없습니다.");
+          _showError(
+            tr(
+              'msg.userfront.login.token_missing',
+              fallback: '로그인 토큰을 확인할 수 없습니다.',
+            ),
+          );
           return;
         }
       } catch (e) {
@@ -873,7 +1029,12 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
     if (mounted) {
       debugPrint("[Auth] Polling timed out for ref: $pendingRef");
       Navigator.of(context).pop();
-      _showError("Login timed out.");
+      _showError(
+        tr(
+          'msg.userfront.login.link_timeout',
+          fallback: '로그인 요청 시간이 초과되었습니다.',
+        ),
+      );
     }
   }
 
@@ -950,7 +1111,12 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
           return;
         }
       } catch (e) {
-        _showError("OIDC 로그인 처리에 실패했습니다. 다시 시도해 주세요.");
+        _showError(
+          tr(
+            'msg.userfront.login.oidc_failed',
+            fallback: 'OIDC 로그인 처리에 실패했습니다. 다시 시도해 주세요.',
+          ),
+        );
         return;
       }
     }
@@ -978,12 +1144,19 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
     showDialog(
       context: context,
       builder: (context) => AlertDialog(
-        title: const Text("미등록 회원"),
-        content: const Text("가입되지 않은 정보입니다.\n회원가입 후 이용해 주세요."),
+        title: Text(
+          tr('ui.userfront.login.unregistered.title', fallback: '미등록 회원'),
+        ),
+        content: Text(
+          tr(
+            'msg.userfront.login.unregistered.body',
+            fallback: '가입되지 않은 정보입니다.\n회원가입 후 이용해 주세요.',
+          ),
+        ),
         actions: [
           TextButton(
             onPressed: () => Navigator.pop(context),
-            child: const Text("취소"),
+            child: Text(tr('ui.common.cancel', fallback: '취소')),
           ),
           FilledButton(
             onPressed: () {
@@ -991,7 +1164,9 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
               _resetLinkLoginState();
               context.push('/signup');
             },
-            child: const Text("회원가입 하기"),
+            child: Text(
+              tr('ui.userfront.login.unregistered.action', fallback: '회원가입 하기'),
+            ),
           ),
         ],
       ),
@@ -1028,8 +1203,8 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                     crossAxisAlignment: CrossAxisAlignment.stretch,
                     children: [
                       Text(
-                        "Baron 로그인",
-                        style: TextStyle(
+                        tr('ui.userfront.app_title', fallback: 'Baron 로그인'),
+                        style: const TextStyle(
                           fontSize: 32,
                           fontWeight: FontWeight.bold,
                         ),
@@ -1045,13 +1220,19 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                             border: Border.all(color: const Color(0xFFFFC107)),
                           ),
                           child: Row(
-                            children: const [
-                              Icon(Icons.warning_amber_rounded, color: Color(0xFF8A6D3B)),
-                              SizedBox(width: 8),
+                            children: [
+                              const Icon(Icons.warning_amber_rounded, color: Color(0xFF8A6D3B)),
+                              const SizedBox(width: 8),
                               Expanded(
                                 child: Text(
-                                  "drySend 모드: 실제 이메일/SMS는 발송되지 않습니다.",
-                                  style: TextStyle(color: Color(0xFF8A6D3B), fontSize: 12),
+                                  tr(
+                                    'msg.userfront.login.dry_send',
+                                    fallback: 'drySend 모드: 실제 이메일/SMS는 발송되지 않습니다.',
+                                  ),
+                                  style: const TextStyle(
+                                    color: Color(0xFF8A6D3B),
+                                    fontSize: 12,
+                                  ),
                                 ),
                               ),
                             ],
@@ -1062,10 +1243,25 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
 
                       TabBar(
                         controller: _tabController,
-                        tabs: const [
-                          Tab(text: "비밀번호"),
-                          Tab(text: "로그인 링크"),
-                          Tab(text: "QR 코드"),
+                        tabs: [
+                          Tab(
+                            text: tr(
+                              'ui.userfront.login.tabs.password',
+                              fallback: '비밀번호',
+                            ),
+                          ),
+                          Tab(
+                            text: tr(
+                              'ui.userfront.login.tabs.link',
+                              fallback: '로그인 링크',
+                            ),
+                          ),
+                          Tab(
+                            text: tr(
+                              'ui.userfront.login.tabs.qr',
+                              fallback: 'QR 코드',
+                            ),
+                          ),
                         ],
                       ),
                       const SizedBox(height: 24),
@@ -1081,10 +1277,13 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                 children: [
                                   TextField(
                                     controller: _passwordLoginIdController,
-                                    decoration: const InputDecoration(
-                                      labelText: "이메일 또는 휴대폰 번호",
-                                      border: OutlineInputBorder(),
-                                      prefixIcon: Icon(Icons.person_outline),
+                                    decoration: InputDecoration(
+                                      labelText: tr(
+                                        'ui.userfront.login.field.login_id',
+                                        fallback: '이메일 또는 휴대폰 번호',
+                                      ),
+                                      border: const OutlineInputBorder(),
+                                      prefixIcon: const Icon(Icons.person_outline),
                                     ),
                                     onSubmitted: (_) => _handlePasswordLogin(),
                                   ),
@@ -1092,10 +1291,13 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                   TextField(
                                     controller: _passwordController,
                                     obscureText: true,
-                                    decoration: const InputDecoration(
-                                      labelText: "비밀번호",
-                                      border: OutlineInputBorder(),
-                                      prefixIcon: Icon(Icons.lock_outline),
+                                    decoration: InputDecoration(
+                                      labelText: tr(
+                                        'ui.userfront.login.field.password',
+                                        fallback: '비밀번호',
+                                      ),
+                                      border: const OutlineInputBorder(),
+                                      prefixIcon: const Icon(Icons.lock_outline),
                                     ),
                                     onSubmitted: (_) => _handlePasswordLogin(),
                                   ),
@@ -1105,7 +1307,9 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                     style: FilledButton.styleFrom(
                                       minimumSize: const Size.fromHeight(50),
                                     ),
-                                    child: const Text("로그인"),
+                                    child: Text(
+                                      tr('ui.userfront.login.action.submit', fallback: '로그인'),
+                                    ),
                                   ),
                                 ],
                               ),
@@ -1118,11 +1322,14 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                   if (_linkPendingRef == null) ...[
                                     TextField(
                                       controller: _linkIdController,
-                                      decoration: const InputDecoration(
-                                        labelText: "이메일 또는 휴대폰 번호",
-                                        hintText: "",
-                                        border: OutlineInputBorder(),
-                                        prefixIcon: Icon(Icons.person_outline),
+                                      decoration: InputDecoration(
+                                        labelText: tr(
+                                          'ui.userfront.login.field.login_id',
+                                          fallback: '이메일 또는 휴대폰 번호',
+                                        ),
+                                        hintText: '',
+                                        border: const OutlineInputBorder(),
+                                        prefixIcon: const Icon(Icons.person_outline),
                                       ),
                                       onSubmitted: (_) => _handleLinkLogin(),
                                     ),
@@ -1132,19 +1339,30 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                       style: FilledButton.styleFrom(
                                         minimumSize: const Size.fromHeight(50),
                                       ),
-                                      child: const Text("로그인 링크 전송"),
+                                      child: Text(
+                                        tr(
+                                          'ui.userfront.login.link.send',
+                                          fallback: '로그인 링크 전송',
+                                        ),
+                                      ),
                                     ),
                                     const SizedBox(height: 24),
-                                    const Text(
-                                      "입력하신 정보로 로그인 링크를 전송합니다.",
-                                      style: TextStyle(color: Colors.grey, fontSize: 12),
+                                    Text(
+                                      tr(
+                                        'msg.userfront.login.link.helper',
+                                        fallback: '입력하신 정보로 로그인 링크를 전송합니다.',
+                                      ),
+                                      style: const TextStyle(color: Colors.grey, fontSize: 12),
                                       textAlign: TextAlign.center,
                                     ),
                                   ],
                                   if (_linkPendingRef != null) ...[
-                                    const Text(
-                                      "링크로 받은 값의 뒤 문자 2개와 숫자 6자리를 입력하셔도 로그인 할 수 있습니다.",
-                                      style: TextStyle(color: Colors.grey, fontSize: 12),
+                                    Text(
+                                      tr(
+                                        'msg.userfront.login.link.short_code_help',
+                                        fallback: '링크로 받은 값의 뒤 문자 2개와 숫자 6자리를 입력하셔도 로그인 할 수 있습니다.',
+                                      ),
+                                      style: const TextStyle(color: Colors.grey, fontSize: 12),
                                       textAlign: TextAlign.center,
                                     ),
                                     const SizedBox(height: 12),
@@ -1155,11 +1373,14 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                           child: TextField(
                                             controller: _shortCodePrefixController,
                                             textCapitalization: TextCapitalization.characters,
-                                            decoration: const InputDecoration(
-                                              labelText: "영문 2자리",
-                                              border: OutlineInputBorder(),
-                                              hintText: "AB",
-                                              hintStyle: TextStyle(color: Colors.grey),
+                                            decoration: InputDecoration(
+                                              labelText: tr(
+                                                'ui.userfront.login.short_code.prefix',
+                                                fallback: '영문 2자리',
+                                              ),
+                                              border: const OutlineInputBorder(),
+                                              hintText: 'AB',
+                                              hintStyle: const TextStyle(color: Colors.grey),
                                             ),
                                             maxLength: 2,
                                           ),
@@ -1171,12 +1392,21 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                             controller: _shortCodeDigitsController,
                                             keyboardType: TextInputType.number,
                                             decoration: InputDecoration(
-                                              labelText: "숫자 6자리",
+                                              labelText: tr(
+                                                'ui.userfront.login.short_code.digits',
+                                                fallback: '숫자 6자리',
+                                              ),
                                               border: const OutlineInputBorder(),
-                                              hintText: "345678",
+                                              hintText: '345678',
                                               hintStyle: const TextStyle(color: Colors.grey),
                                               suffixText: _linkExpireSeconds > 0
-                                                  ? "유효시간 ${_formatTime(_linkExpireSeconds)}"
+                                                  ? tr(
+                                                      'ui.userfront.login.short_code.expire_time',
+                                                      fallback: '유효시간 {{time}}',
+                                                      params: {
+                                                        'time': _formatTime(_linkExpireSeconds),
+                                                      },
+                                                    )
                                                   : null,
                                             ),
                                             maxLength: 6,
@@ -1190,7 +1420,12 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                         final prefix = _shortCodePrefixController.text.trim().toUpperCase();
                                         final digits = _shortCodeDigitsController.text.trim();
                                         if (prefix.length != 2 || digits.length != 6) {
-                                          _showError("문자 2개와 숫자 6자리를 입력해 주세요.");
+                                          _showError(
+                                            tr(
+                                              'msg.userfront.login.short_code.invalid',
+                                              fallback: '문자 2개와 숫자 6자리를 입력해 주세요.',
+                                            ),
+                                          );
                                           return;
                                         }
                                         _verifyShortCode(prefix + digits);
@@ -1198,18 +1433,36 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                       style: FilledButton.styleFrom(
                                         minimumSize: const Size.fromHeight(45),
                                       ),
-                                      child: const Text("코드로 로그인"),
+                                      child: Text(
+                                        tr(
+                                          'ui.userfront.login.short_code.submit',
+                                          fallback: '코드로 로그인',
+                                        ),
+                                      ),
                                     ),
                                     const SizedBox(height: 12),
                                     TextButton(
                                       onPressed: () {
                                         if (_linkResendSeconds > 0) {
-                                          _showInfo("재발송은 ${_formatTime(_linkResendSeconds)} 후 가능합니다.");
+                                          _showInfo(
+                                            tr(
+                                              'msg.userfront.login.link.resend_wait',
+                                              fallback: '재발송은 {{time}} 후 가능합니다.',
+                                              params: {
+                                                'time': _formatTime(_linkResendSeconds),
+                                              },
+                                            ),
+                                          );
                                           return;
                                         }
                                         final loginId = _lastLinkLoginId ?? _linkIdController.text.trim();
                                         if (loginId.isEmpty) {
-                                          _showError("이메일 또는 휴대폰 번호를 입력해 주세요.");
+                                          _showError(
+                                            tr(
+                                              'msg.userfront.login.link.missing_login_id',
+                                              fallback: '이메일 또는 휴대폰 번호를 입력해 주세요.',
+                                            ),
+                                          );
                                           return;
                                         }
                                         _startEnchantedFlow(
@@ -1220,8 +1473,17 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                       },
                                       child: Text(
                                         _linkResendSeconds > 0
-                                            ? "재발송 (${_formatTime(_linkResendSeconds)})"
-                                            : "재발송",
+                                            ? tr(
+                                                'ui.userfront.login.link.resend_with_time',
+                                                fallback: '재발송 ({{time}})',
+                                                params: {
+                                                  'time': _formatTime(_linkResendSeconds),
+                                                },
+                                              )
+                                            : tr(
+                                                'ui.common.resend',
+                                                fallback: '재발송',
+                                              ),
                                       ),
                                     ),
                                     if (!_lastLinkIsEmail) ...[
@@ -1229,12 +1491,25 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                       TextButton(
                                         onPressed: () {
                                           if (_linkResendSeconds > 0) {
-                                            _showInfo("재발송은 ${_formatTime(_linkResendSeconds)} 후 가능합니다.");
+                                            _showInfo(
+                                              tr(
+                                                'msg.userfront.login.link.resend_wait',
+                                                fallback: '재발송은 {{time}} 후 가능합니다.',
+                                                params: {
+                                                  'time': _formatTime(_linkResendSeconds),
+                                                },
+                                              ),
+                                            );
                                             return;
                                           }
                                           final loginId = _lastLinkLoginId ?? _linkIdController.text.trim();
                                           if (loginId.isEmpty) {
-                                            _showError("휴대폰 번호를 입력해 주세요.");
+                                            _showError(
+                                              tr(
+                                                'msg.userfront.login.link.missing_phone',
+                                                fallback: '휴대폰 번호를 입력해 주세요.',
+                                              ),
+                                            );
                                             return;
                                           }
                                           _startEnchantedFlow(
@@ -1243,7 +1518,15 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                             codeOnly: true,
                                           );
                                         },
-                                        child: Text("코드만 받기(${_formatTime(_linkResendSeconds)})"),
+                                        child: Text(
+                                          tr(
+                                            'ui.userfront.login.link.code_only',
+                                            fallback: '코드만 받기({{time}})',
+                                            params: {
+                                              'time': _formatTime(_linkResendSeconds),
+                                            },
+                                          ),
+                                        ),
                                       ),
                                     ],
                                   ],
@@ -1276,8 +1559,17 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                       const SizedBox(height: 12),
                                       Text(
                                         _qrRemainingSeconds > 0
-                                          ? "남은 시간: ${_formatTime(_qrRemainingSeconds)}"
-                                          : "QR 코드 만료됨",
+                                          ? tr(
+                                              'ui.userfront.login.qr.remaining',
+                                              fallback: '남은 시간: {{time}}',
+                                              params: {
+                                                'time': _formatTime(_qrRemainingSeconds),
+                                              },
+                                            )
+                                          : tr(
+                                              'ui.userfront.login.qr.expired',
+                                              fallback: 'QR 코드 만료됨',
+                                            ),
                                         textAlign: TextAlign.center,
                                         style: TextStyle(
                                           color: _qrRemainingSeconds > 30 ? Colors.blue : Colors.red,
@@ -1285,19 +1577,33 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                                         ),
                                       ),
                                       const SizedBox(height: 8),
-                                      const Text(
-                                        "모바일 앱으로 스캔하세요",
+                                      Text(
+                                        tr(
+                                          'msg.userfront.login.qr.scan_hint',
+                                          fallback: '모바일 앱으로 스캔하세요',
+                                        ),
                                         textAlign: TextAlign.center,
-                                        style: TextStyle(color: Colors.grey, fontSize: 12),
+                                        style: const TextStyle(color: Colors.grey, fontSize: 12),
                                       ),
                                       TextButton(
                                         onPressed: _startQrFlow,
-                                        child: const Text("QR 코드 새로고침")
+                                        child: Text(
+                                          tr(
+                                            'ui.userfront.login.qr.refresh',
+                                            fallback: 'QR 코드 새로고침',
+                                          ),
+                                        ),
                                       ),
                                     ],
                                   )
                                 else
-                                  const Text("QR 코드를 불러오지 못했습니다.", textAlign: TextAlign.center),
+                                  Text(
+                                    tr(
+                                      'msg.userfront.login.qr.load_failed',
+                                      fallback: 'QR 코드를 불러오지 못했습니다.',
+                                    ),
+                                    textAlign: TextAlign.center,
+                                  ),
                               ],
                             ),
                           ],
@@ -1308,15 +1614,31 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                         children: [
                           TextButton(
                             onPressed: () => context.push('/forgot-password'),
-                            child: const Text("비밀번호를 잊으셨나요?"),
+                            child: Text(
+                              tr(
+                                'ui.userfront.login.forgot_password',
+                                fallback: '비밀번호를 잊으셨나요?',
+                              ),
+                            ),
                           ),
                           Row(
                             mainAxisAlignment: MainAxisAlignment.center,
                             children: [
-                              const Text("계정이 없으신가요?", style: TextStyle(color: Colors.grey, fontSize: 14)),
+                              Text(
+                                tr(
+                                  'msg.userfront.login.no_account',
+                                  fallback: '계정이 없으신가요?',
+                                ),
+                                style: const TextStyle(color: Colors.grey, fontSize: 14),
+                              ),
                               TextButton(
                                 onPressed: () => context.push('/signup'),
-                                child: const Text("회원가입"),
+                                child: Text(
+                                  tr(
+                                    'ui.userfront.login.signup',
+                                    fallback: '회원가입',
+                                  ),
+                                ),
                               ),
                             ],
                           ),

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),
+                ),
               ),
             ],
           ),

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

@@ -4,6 +4,7 @@ import 'package:go_router/go_router.dart';
 import 'package:logging/logging.dart';
 import '../../../core/services/auth_proxy_service.dart';
 import '../../../core/services/auth_token_store.dart';
+import 'package:userfront/i18n.dart';
 
 class QRScanScreen extends StatefulWidget {
   const QRScanScreen({super.key});
@@ -143,7 +144,10 @@ class _QRScanScreenState extends State<QRScanScreen> {
           if (mounted) {
             setState(() {
               _isSuccess = true;
-              _resultMessage = 'QR 승인 완료! PC 화면에서 로그인이 진행됩니다.';
+              _resultMessage = tr(
+                'msg.userfront.qr.approve_success',
+                fallback: 'QR 승인 완료! PC 화면에서 로그인이 진행됩니다.',
+              );
               _isProcessing = false;
             });
           }
@@ -152,7 +156,11 @@ class _QRScanScreenState extends State<QRScanScreen> {
           if (mounted) {
             setState(() {
               _isSuccess = false;
-              _resultMessage = 'QR 승인 실패: $e';
+              _resultMessage = tr(
+                'msg.userfront.qr.approve_error',
+                fallback: 'QR 승인 실패: {{error}}',
+                params: {'error': '$e'},
+              );
               _isProcessing = false;
             });
           }
@@ -181,8 +189,13 @@ class _QRScanScreenState extends State<QRScanScreen> {
       _log.warning('Camera permission request failed: $e');
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(
-            content: Text('카메라 권한 요청에 실패했습니다. 브라우저/OS 설정을 확인해주세요.'),
+          SnackBar(
+            content: Text(
+              tr(
+                'msg.userfront.qr.permission_error',
+                fallback: '카메라 권한 요청에 실패했습니다. 브라우저/OS 설정을 확인해주세요.',
+              ),
+            ),
             backgroundColor: Colors.red,
           ),
         );
@@ -198,7 +211,9 @@ class _QRScanScreenState extends State<QRScanScreen> {
     final success = _isSuccess == true;
     final icon = success ? Icons.check_circle_outline : Icons.error_outline;
     final color = success ? Colors.green : Colors.red;
-    final title = success ? '승인 완료' : '승인 실패';
+    final title = success
+        ? tr('ui.userfront.qr.result_success', fallback: '승인 완료')
+        : tr('ui.userfront.qr.result_failure', fallback: '승인 실패');
     final message = _resultMessage ?? '';
 
     return Center(
@@ -223,12 +238,12 @@ class _QRScanScreenState extends State<QRScanScreen> {
             if (!success)
               FilledButton(
                 onPressed: _resetScan,
-                child: const Text('다시 스캔'),
+                child: Text(tr('ui.userfront.qr.rescan', fallback: '다시 스캔')),
               ),
             if (success)
               FilledButton(
                 onPressed: () => context.pop(),
-                child: const Text('닫기'),
+                child: Text(tr('ui.common.close', fallback: '닫기')),
               ),
           ],
         ),
@@ -240,7 +255,7 @@ class _QRScanScreenState extends State<QRScanScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: const Text('Scan QR Code'),
+        title: Text(tr('ui.userfront.qr.title', fallback: 'Scan QR Code')),
         leading: IconButton(
           icon: const Icon(Icons.arrow_back),
           onPressed: () => context.pop(),
@@ -263,8 +278,15 @@ class _QRScanScreenState extends State<QRScanScreen> {
                           const SizedBox(height: 10),
                           Text(
                             isPermissionDenied
-                                ? '카메라 권한이 필요합니다.'
-                                : '카메라 오류: ${error.errorCode}',
+                                ? tr(
+                                    'msg.userfront.qr.permission_required',
+                                    fallback: '카메라 권한이 필요합니다.',
+                                  )
+                                : tr(
+                                    'msg.userfront.qr.camera_error',
+                                    fallback: '카메라 오류: {{error}}',
+                                    params: {'error': '${error.errorCode}'},
+                                  ),
                           ),
                           const SizedBox(height: 12),
                           FilledButton(
@@ -273,8 +295,11 @@ class _QRScanScreenState extends State<QRScanScreen> {
                                 : _requestCameraPermission,
                             child: Text(
                               _isRequestingCamera
-                                  ? '요청 중...'
-                                  : '카메라 권한 요청하기',
+                                  ? tr('ui.common.requesting', fallback: '요청 중...')
+                                  : tr(
+                                      'ui.userfront.qr.request_permission',
+                                      fallback: '카메라 권한 요청하기',
+                                    ),
                             ),
                           ),
                         ],

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

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import '../../../core/services/auth_proxy_service.dart';
+import 'package:userfront/i18n.dart';
 
 class ResetPasswordScreen extends StatefulWidget {
   final String? loginId; // Now receiving loginId
@@ -66,7 +67,12 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
   Future<void> _handlePasswordReset() async {
     if (_formKey.currentState?.validate() != true) return;
     if ((_loginId == null || _loginId!.isEmpty) && (_token == null || _token!.isEmpty)) {
-      _showError("유효하지 않은 재설정 링크입니다. (loginId/token 누락)");
+      _showError(
+        tr(
+          'msg.userfront.reset.invalid_link',
+          fallback: '유효하지 않은 재설정 링크입니다. (loginId/token 누락)',
+        ),
+      );
       return;
     }
 
@@ -81,8 +87,13 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
 
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(
-            content: Text("비밀번호가 성공적으로 변경되었습니다. 다시 로그인해주세요."),
+          SnackBar(
+            content: Text(
+              tr(
+                'msg.userfront.reset.success',
+                fallback: '비밀번호가 성공적으로 변경되었습니다. 다시 로그인해주세요.',
+              ),
+            ),
             backgroundColor: Colors.green,
           ),
         );
@@ -90,7 +101,13 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
       }
     } catch (e) {
       if (mounted) {
-        _showError("비밀번호 변경에 실패했습니다: ${e.toString()}");
+        _showError(
+          tr(
+            'msg.userfront.reset.error.generic',
+            fallback: '비밀번호 변경에 실패했습니다: {{error}}',
+            params: {'error': e.toString()},
+          ),
+        );
       }
     } finally {
       if (mounted) {
@@ -107,7 +124,10 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
 
   String _buildPolicyDescription() {
     if (_isPolicyLoading) {
-      return "비밀번호 정책을 불러오는 중입니다...";
+      return tr(
+        'msg.userfront.reset.policy_loading',
+        fallback: '비밀번호 정책을 불러오는 중입니다...',
+      );
     }
     final minLength = (_policy?['minLength'] as int?) ?? 12;
     final minTypes = (_policy?['minCharacterTypes'] as int?) ?? 0;
@@ -116,14 +136,42 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
     final requiresNumber = _policy?['number'] ?? true;
     final requiresSymbol = _policy?['nonAlphanumeric'] ?? true;
 
-    final parts = <String>["최소 ${minLength}자 이상"];
+    final parts = <String>[
+      tr(
+        'msg.userfront.reset.policy.min_length',
+        fallback: '최소 {{count}}자 이상',
+        params: {'count': '$minLength'},
+      ),
+    ];
     if (minTypes > 0) {
-      parts.add("영문 대/소문자/숫자/특수문자 중 ${minTypes}가지 이상");
+      parts.add(
+        tr(
+          'msg.userfront.reset.policy.min_types',
+          fallback: '영문 대/소문자/숫자/특수문자 중 {{count}}가지 이상',
+          params: {'count': '$minTypes'},
+        ),
+      );
+    }
+    if (requiresLower) {
+      parts.add(
+        tr('msg.userfront.reset.policy.lowercase', fallback: '소문자 1개 이상'),
+      );
+    }
+    if (requiresUpper) {
+      parts.add(
+        tr('msg.userfront.reset.policy.uppercase', fallback: '대문자 1개 이상'),
+      );
+    }
+    if (requiresNumber) {
+      parts.add(
+        tr('msg.userfront.reset.policy.number', fallback: '숫자 1개 이상'),
+      );
+    }
+    if (requiresSymbol) {
+      parts.add(
+        tr('msg.userfront.reset.policy.symbol', fallback: '특수문자 1개 이상'),
+      );
     }
-    if (requiresLower) parts.add("소문자 1개 이상");
-    if (requiresUpper) parts.add("대문자 1개 이상");
-    if (requiresNumber) parts.add("숫자 1개 이상");
-    if (requiresSymbol) parts.add("특수문자 1개 이상");
 
     return parts.join(", ");
   }
@@ -132,7 +180,9 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: const Text("새 비밀번호 설정"),
+        title: Text(
+          tr('ui.userfront.reset.title', fallback: '새 비밀번호 설정'),
+        ),
         centerTitle: true,
       ),
       body: Center(
@@ -148,7 +198,10 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
                     crossAxisAlignment: CrossAxisAlignment.stretch,
                     children: [
                       Text(
-                        "새로운 비밀번호 설정",
+                        tr(
+                          'ui.userfront.reset.subtitle',
+                          fallback: '새로운 비밀번호 설정',
+                        ),
                         style: TextStyle(
                           fontSize: 28,
                           fontWeight: FontWeight.bold,
@@ -166,7 +219,10 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
                         controller: _passwordController,
                         obscureText: _isPasswordObscured,
                         decoration: InputDecoration(
-                          labelText: "새 비밀번호",
+                          labelText: tr(
+                            'ui.userfront.reset.new_password',
+                            fallback: '새 비밀번호',
+                          ),
                           border: const OutlineInputBorder(),
                           prefixIcon: const Icon(Icons.lock_outline),
                           suffixIcon: IconButton(
@@ -183,11 +239,18 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
                         validator: (value) {
                           final val = value ?? "";
                           if (val.isEmpty) {
-                            return '비밀번호를 입력해주세요.';
+                            return tr(
+                              'msg.userfront.reset.error.empty_password',
+                              fallback: '비밀번호를 입력해주세요.',
+                            );
                           }
                           final minLength = (_policy?['minLength'] as int?) ?? 12;
                           if (val.length < minLength) {
-                            return '비밀번호는 최소 $minLength자 이상이어야 합니다.';
+                            return tr(
+                              'msg.userfront.reset.error.min_length',
+                              fallback: '비밀번호는 최소 {{count}}자 이상이어야 합니다.',
+                              params: {'count': '$minLength'},
+                            );
                           }
                           final hasLower = RegExp(r'[a-z]').hasMatch(val);
                           final hasUpper = RegExp(r'[A-Z]').hasMatch(val);
@@ -201,20 +264,37 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
 
                           final minTypes = (_policy?['minCharacterTypes'] as int?) ?? 0;
                           if (minTypes > 0 && typeCount < minTypes) {
-                            return '비밀번호는 영문 대/소문자/숫자/특수문자 중 $minTypes가지 이상 포함해야 합니다.';
+                            return tr(
+                              'msg.userfront.reset.error.min_types',
+                              fallback:
+                                  '비밀번호는 영문 대/소문자/숫자/특수문자 중 {{count}}가지 이상 포함해야 합니다.',
+                              params: {'count': '$minTypes'},
+                            );
                           }
 
                           if ((_policy?['lowercase'] ?? true) && !hasLower) {
-                            return '최소 1개 이상의 소문자를 포함해야 합니다.';
+                            return tr(
+                              'msg.userfront.reset.error.lowercase',
+                              fallback: '최소 1개 이상의 소문자를 포함해야 합니다.',
+                            );
                           }
                           if ((_policy?['uppercase'] ?? false) && !hasUpper) {
-                            return '최소 1개 이상의 대문자를 포함해야 합니다.';
+                            return tr(
+                              'msg.userfront.reset.error.uppercase',
+                              fallback: '최소 1개 이상의 대문자를 포함해야 합니다.',
+                            );
                           }
                           if ((_policy?['number'] ?? true) && !hasNumber) {
-                            return '최소 1개 이상의 숫자를 포함해야 합니다.';
+                            return tr(
+                              'msg.userfront.reset.error.number',
+                              fallback: '최소 1개 이상의 숫자를 포함해야 합니다.',
+                            );
                           }
                           if ((_policy?['nonAlphanumeric'] ?? true) && !hasSymbol) {
-                            return '최소 1개 이상의 특수문자를 포함해야 합니다.';
+                            return tr(
+                              'msg.userfront.reset.error.symbol',
+                              fallback: '최소 1개 이상의 특수문자를 포함해야 합니다.',
+                            );
                           }
                           return null;
                         },
@@ -224,7 +304,10 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
                         controller: _confirmPasswordController,
                         obscureText: _isConfirmPasswordObscured,
                         decoration: InputDecoration(
-                          labelText: "새 비밀번호 확인",
+                          labelText: tr(
+                            'ui.userfront.reset.confirm_password',
+                            fallback: '새 비밀번호 확인',
+                          ),
                           border: const OutlineInputBorder(),
                           prefixIcon: const Icon(Icons.lock_outline),
                           suffixIcon: IconButton(
@@ -240,7 +323,10 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
                         ),
                         validator: (value) {
                           if (value != _passwordController.text) {
-                            return '비밀번호가 일치하지 않습니다.';
+                            return tr(
+                              'msg.userfront.reset.error.mismatch',
+                              fallback: '비밀번호가 일치하지 않습니다.',
+                            );
                           }
                           return null;
                         },
@@ -255,9 +341,17 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
                             ? const SizedBox(
                                 height: 20,
                                 width: 20,
-                                child: CircularProgressIndicator(strokeWidth: 2, color: Colors.white),
+                                child: CircularProgressIndicator(
+                                  strokeWidth: 2,
+                                  color: Colors.white,
+                                ),
                               )
-                            : const Text("비밀번호 변경"),
+                            : Text(
+                                tr(
+                                  'ui.userfront.reset.submit',
+                                  fallback: '비밀번호 변경',
+                                ),
+                              ),
                       ),
                     ],
                   ),
@@ -268,20 +362,24 @@ class _ResetPasswordScreenState extends State<ResetPasswordScreen> {
   }
 
   Widget _buildInvalidTokenView() {
-    return const Center(
+    return Center(
       child: Column(
         mainAxisAlignment: MainAxisAlignment.center,
         children: [
-          Icon(Icons.error_outline, color: Colors.red, size: 60),
-          SizedBox(height: 16),
+          const Icon(Icons.error_outline, color: Colors.red, size: 60),
+          const SizedBox(height: 16),
           Text(
-            "유효하지 않은 링크입니다.",
-            style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
+            tr('msg.userfront.reset.invalid_title',
+                fallback: '유효하지 않은 링크입니다.'),
+            style: const TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
             textAlign: TextAlign.center,
           ),
-          SizedBox(height: 8),
+          const SizedBox(height: 8),
           Text(
-            "비밀번호 재설정 링크가 만료되었거나 잘못되었습니다. 다시 시도해주세요.",
+            tr(
+              'msg.userfront.reset.invalid_body',
+              fallback: '비밀번호 재설정 링크가 만료되었거나 잘못되었습니다. 다시 시도해주세요.',
+            ),
             textAlign: TextAlign.center,
           ),
         ],

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

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:go_router/go_router.dart';
+import 'package:userfront/i18n.dart';
 import '../../../core/services/auth_proxy_service.dart';
 
 class SignupScreen extends StatefulWidget {
@@ -130,8 +131,11 @@ class _SignupScreenState extends State<SignupScreen> {
       _emailTimer = Timer.periodic(const Duration(seconds: 1), (timer) {
         if (!mounted) return;
         setState(() {
-          if (_emailSeconds > 0) _emailSeconds--;
-          else timer.cancel();
+          if (_emailSeconds > 0) {
+            _emailSeconds--;
+          } else {
+            timer.cancel();
+          }
         });
       });
     } else {
@@ -140,8 +144,11 @@ class _SignupScreenState extends State<SignupScreen> {
       _phoneTimer = Timer.periodic(const Duration(seconds: 1), (timer) {
         if (!mounted) return;
         setState(() {
-          if (_phoneSeconds > 0) _phoneSeconds--;
-          else timer.cancel();
+          if (_phoneSeconds > 0) {
+            _phoneSeconds--;
+          } else {
+            timer.cancel();
+          }
         });
       });
     }
@@ -157,20 +164,30 @@ class _SignupScreenState extends State<SignupScreen> {
     final email = _emailController.text.trim();
     final emailRegex = RegExp(r'^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$');
     if (!emailRegex.hasMatch(email)) {
-      setState(() => _emailError = '유효한 이메일 형식이 아닙니다.');
+      setState(() => _emailError = tr(
+            'msg.userfront.signup.email.invalid',
+            fallback: '유효한 이메일 형식이 아닙니다.',
+          ));
       return;
     }
     setState(() { _isLoading = true; _emailError = null; });
     try {
       final available = await AuthProxyService.checkEmailAvailability(email);
       if (!available) {
-        setState(() => _emailError = '이미 가입된 이메일입니다.');
+        setState(() => _emailError = tr(
+              'msg.userfront.signup.email.duplicate',
+              fallback: '이미 가입된 이메일입니다.',
+            ));
         return;
       }
       await AuthProxyService.sendSignupCode(email, 'email');
       _startTimer('email');
     } catch (e) {
-      setState(() => _emailError = '발송 실패: $e');
+      setState(() => _emailError = tr(
+            'msg.userfront.signup.email.send_failed',
+            fallback: '발송 실패: {{error}}',
+            params: {'error': e.toString()},
+          ));
     } finally {
       setState(() => _isLoading = false);
     }
@@ -189,10 +206,17 @@ class _SignupScreenState extends State<SignupScreen> {
           _emailError = null;
         });
       } else {
-        setState(() => _emailError = '인증코드가 일치하지 않습니다.');
+        setState(() => _emailError = tr(
+              'msg.userfront.signup.email.code_mismatch',
+              fallback: '인증코드가 일치하지 않습니다.',
+            ));
       }
     } catch (e) {
-      setState(() => _emailError = '인증 실패: $e');
+      setState(() => _emailError = tr(
+            'msg.userfront.signup.email.verify_failed',
+            fallback: '인증 실패: {{error}}',
+            params: {'error': e.toString()},
+          ));
     }
   }
 
@@ -204,7 +228,11 @@ class _SignupScreenState extends State<SignupScreen> {
       await AuthProxyService.sendSignupCode(phone, 'phone');
       _startTimer('phone');
     } catch (e) {
-      setState(() => _phoneError = '발송 실패: $e');
+      setState(() => _phoneError = tr(
+            'msg.userfront.signup.phone.send_failed',
+            fallback: '발송 실패: {{error}}',
+            params: {'error': e.toString()},
+          ));
     } finally {
       setState(() => _isLoading = false);
     }
@@ -223,16 +251,26 @@ class _SignupScreenState extends State<SignupScreen> {
           _phoneError = null;
         });
       } else {
-        setState(() => _phoneError = '인증코드가 일치하지 않습니다.');
+        setState(() => _phoneError = tr(
+              'msg.userfront.signup.phone.code_mismatch',
+              fallback: '인증코드가 일치하지 않습니다.',
+            ));
       }
     } catch (e) {
-      setState(() => _phoneError = '인증 실패: $e');
+      setState(() => _phoneError = tr(
+            'msg.userfront.signup.phone.verify_failed',
+            fallback: '인증 실패: {{error}}',
+            params: {'error': e.toString()},
+          ));
     }
   }
 
   Future<void> _handleSignup() async {
     if (_passwordController.text != _confirmPasswordController.text) {
-      setState(() => _confirmPasswordError = '비밀번호가 일치하지 않습니다.');
+      setState(() => _confirmPasswordError = tr(
+            'msg.userfront.signup.password.mismatch',
+            fallback: '비밀번호가 일치하지 않습니다.',
+          ));
       return;
     }
     if (!_formKey.currentState!.validate()) return;
@@ -257,12 +295,38 @@ class _SignupScreenState extends State<SignupScreen> {
     } catch (e) {
       String eStr = e.toString().toLowerCase();
       setState(() {
-        if (eStr.contains('uppercase')) _passwordError = '대문자가 최소 1개 이상 포함되어야 합니다.';
-        else if (eStr.contains('lowercase')) _passwordError = '소문자가 최소 1개 이상 포함되어야 합니다.';
-        else if (eStr.contains('digit') || eStr.contains('number')) _passwordError = '숫자가 최소 1개 이상 포함되어야 합니다.';
-        else if (eStr.contains('symbol') || eStr.contains('special')) _passwordError = '특수문자가 최소 1개 이상 포함되어야 합니다.';
-        else if (eStr.contains('length') || eStr.contains('12 characters')) _passwordError = '비밀번호는 최소 12자 이상이어야 합니다.';
-        else _passwordError = '가입 실패: $e';
+        if (eStr.contains('uppercase')) {
+          _passwordError = tr(
+            'msg.userfront.signup.password.uppercase_required',
+            fallback: '대문자가 최소 1개 이상 포함되어야 합니다.',
+          );
+        } else if (eStr.contains('lowercase')) {
+          _passwordError = tr(
+            'msg.userfront.signup.password.lowercase_required',
+            fallback: '소문자가 최소 1개 이상 포함되어야 합니다.',
+          );
+        } else if (eStr.contains('digit') || eStr.contains('number')) {
+          _passwordError = tr(
+            'msg.userfront.signup.password.number_required',
+            fallback: '숫자가 최소 1개 이상 포함되어야 합니다.',
+          );
+        } else if (eStr.contains('symbol') || eStr.contains('special')) {
+          _passwordError = tr(
+            'msg.userfront.signup.password.symbol_required',
+            fallback: '특수문자가 최소 1개 이상 포함되어야 합니다.',
+          );
+        } else if (eStr.contains('length') || eStr.contains('12 characters')) {
+          _passwordError = tr(
+            'msg.userfront.signup.password.length_required',
+            fallback: '비밀번호는 최소 12자 이상이어야 합니다.',
+          );
+        } else {
+          _passwordError = tr(
+            'msg.userfront.signup.failed',
+            fallback: '가입 실패: {{error}}',
+            params: {'error': e.toString()},
+          );
+        }
       });
     } finally {
       setState(() => _isLoading = false);
@@ -274,9 +338,20 @@ class _SignupScreenState extends State<SignupScreen> {
       context: context,
       barrierDismissible: false,
       builder: (context) => AlertDialog(
-        title: const Text('회원가입 완료'),
-        content: const Text('성공적으로 가입되었습니다.'),
-        actions: [TextButton(onPressed: () => context.go('/signin'), child: const Text('로그인하기'))],
+        title: Text(
+          tr('msg.userfront.signup.success.title', fallback: '회원가입 완료'),
+        ),
+        content: Text(
+          tr('msg.userfront.signup.success.body', fallback: '성공적으로 가입되었습니다.'),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => context.go('/signin'),
+            child: Text(
+              tr('ui.userfront.signup.success.action', fallback: '로그인하기'),
+            ),
+          ),
+        ],
       ),
     );
   }
@@ -288,13 +363,25 @@ class _SignupScreenState extends State<SignupScreen> {
       padding: const EdgeInsets.symmetric(vertical: 20),
       child: Row(
         children: [
-          _stepCircle(1, '약관동의'),
+          _stepCircle(
+            1,
+            tr('ui.userfront.signup.steps.agreement', fallback: '약관동의'),
+          ),
           _stepLine(1),
-          _stepCircle(2, '본인인증'),
+          _stepCircle(
+            2,
+            tr('ui.userfront.signup.steps.verify', fallback: '본인인증'),
+          ),
           _stepLine(2),
-          _stepCircle(3, '정보입력'),
+          _stepCircle(
+            3,
+            tr('ui.userfront.signup.steps.profile', fallback: '정보입력'),
+          ),
           _stepLine(3),
-          _stepCircle(4, '비밀번호'),
+          _stepCircle(
+            4,
+            tr('ui.userfront.signup.steps.password', fallback: '비밀번호'),
+          ),
         ],
       ),
     );
@@ -330,9 +417,17 @@ class _SignupScreenState extends State<SignupScreen> {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
-        Text('서비스 이용을 위해\n약관에 동의해주세요',
-            style: TextStyle(
-                fontSize: 20, fontWeight: FontWeight.bold, height: 1.3)),
+        Text(
+          tr(
+            'msg.userfront.signup.agreement.title',
+            fallback: '서비스 이용을 위해\n약관에 동의해주세요',
+          ),
+          style: const TextStyle(
+            fontSize: 20,
+            fontWeight: FontWeight.bold,
+            height: 1.3,
+          ),
+        ),
         const SizedBox(height: 24),
         // 모두 동의 버튼
         Container(
@@ -342,8 +437,13 @@ class _SignupScreenState extends State<SignupScreen> {
             border: Border.all(color: Colors.grey[200]!),
           ),
           child: CheckboxListTile(
-            title: const Text('모두 동의합니다',
-                style: TextStyle(fontSize: 15, fontWeight: FontWeight.bold)),
+            title: Text(
+              tr(
+                'ui.userfront.signup.agreement.all',
+                fallback: '모두 동의합니다',
+              ),
+              style: const TextStyle(fontSize: 15, fontWeight: FontWeight.bold),
+            ),
             value: _termsAccepted && _privacyAccepted,
             onChanged: (val) {
               setState(() {
@@ -357,14 +457,20 @@ class _SignupScreenState extends State<SignupScreen> {
         ),
         const SizedBox(height: 16),
         _agreementSection(
-          title: '바론 소프트웨어 이용약관 (필수)',
+          title: tr(
+            'ui.userfront.signup.agreement.tos_title',
+            fallback: '바론 소프트웨어 이용약관 (필수)',
+          ),
           content: _tosText,
           value: _termsAccepted,
           onChanged: (val) => setState(() => _termsAccepted = val!),
         ),
         const SizedBox(height: 16),
         _agreementSection(
-          title: '개인정보 수집 및 이용 동의 (필수)',
+          title: tr(
+            'ui.userfront.signup.agreement.privacy_title',
+            fallback: '개인정보 수집 및 이용 동의 (필수)',
+          ),
           content: _privacyText,
           value: _privacyAccepted,
           onChanged: (val) => setState(() => _privacyAccepted = val!),
@@ -410,7 +516,9 @@ class _SignupScreenState extends State<SignupScreen> {
     );
   }
 
-  static const String _tosText = """
+  static String get _tosText => tr(
+        'msg.userfront.signup.tos_full',
+        fallback: """
 바론 소프트웨어 이용약관
 
 제1장 총칙
@@ -480,9 +588,12 @@ class _SignupScreenState extends State<SignupScreen> {
 본 약관에 따른 분쟁은 서울중앙지방법원을 관할 법원으로 합니다.
 부칙
 본 약관은 2024년 10월 1일부터 시행됩니다.
-""";
+""",
+      );
 
-  static const String _privacyText = """
+  static String get _privacyText => tr(
+        'msg.userfront.signup.privacy_full',
+        fallback: """
 개인정보 수집 및 이용 동의
 
 바론서비스 개인정보처리방침
@@ -590,33 +701,46 @@ class _SignupScreenState extends State<SignupScreen> {
 회사는 이용자의 개인정보를 국외로 이전하지 않으며, 향후 필요한 경우, 사전에 이용자의 동의를 받습니다.
 제8조 (기타)
 본 방침에 명시되지 않은 사항은 회사의 내부 방침과 관련 법령에 따릅니다.
-""";
+""",
+      );
 
   Widget _buildStepAuth() {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
-        Text('본인 확인을 위해\n인증을 진행해주세요', style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
+        Text(
+          tr(
+            'msg.userfront.signup.auth.title',
+            fallback: '본인 확인을 위해\n인증을 진행해주세요',
+          ),
+          style: const TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
+        ),
         const SizedBox(height: 16),
         // 가족사 이메일 안내 문구
         Container(
           padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
           decoration: BoxDecoration(color: Colors.blue[50], borderRadius: BorderRadius.circular(6)),
-          child: const Row(
+          child: Row(
             children: [
-              Icon(Icons.info_outline, size: 16, color: Colors.blue),
-              SizedBox(width: 8),
+              const Icon(Icons.info_outline, size: 16, color: Colors.blue),
+              const SizedBox(width: 8),
               Expanded(
                 child: Text(
-                  '가족사 회원의 경우 반드시 회사 공식 이메일을 입력해주세요.',
-                  style: TextStyle(fontSize: 12, color: Colors.blue, fontWeight: FontWeight.w500),
+                  tr(
+                    'msg.userfront.signup.auth.affiliate_notice',
+                    fallback: '가족사 회원의 경우 반드시 회사 공식 이메일을 입력해주세요.',
+                  ),
+                  style: const TextStyle(fontSize: 12, color: Colors.blue, fontWeight: FontWeight.w500),
                 ),
               ),
             ],
           ),
         ),
         const SizedBox(height: 24),
-        Text('이메일 인증', style: const TextStyle(fontWeight: FontWeight.bold)),
+        Text(
+          tr('ui.userfront.signup.auth.email.title', fallback: '이메일 인증'),
+          style: const TextStyle(fontWeight: FontWeight.bold),
+        ),
         const SizedBox(height: 8),
         Row(
           children: [
@@ -625,7 +749,10 @@ class _SignupScreenState extends State<SignupScreen> {
                 controller: _emailController,
                 onChanged: _checkEmailAffiliation, // 도메인 실시간 체크
                 decoration: InputDecoration(
-                  labelText: '이메일 주소', 
+                  labelText: tr(
+                    'ui.userfront.signup.auth.email.label',
+                    fallback: '이메일 주소',
+                  ),
                   border: const OutlineInputBorder(), 
                   errorText: _emailError,
                   hintText: 'example@hanmaceng.co.kr',
@@ -639,7 +766,14 @@ class _SignupScreenState extends State<SignupScreen> {
               child: ElevatedButton(
                 onPressed: (_isEmailVerified || _isLoading) ? null : _sendEmailCode,
                 style: ElevatedButton.styleFrom(backgroundColor: Colors.grey[100], foregroundColor: Colors.black, elevation: 0),
-                child: Text(_emailSeconds > 0 ? '재발송' : '인증요청'),
+                child: Text(
+                  _emailSeconds > 0
+                      ? tr('ui.common.resend', fallback: '재발송')
+                      : tr(
+                          'ui.userfront.signup.auth.request_code',
+                          fallback: '인증요청',
+                        ),
+                ),
               ),
             ),
           ],
@@ -649,7 +783,10 @@ class _SignupScreenState extends State<SignupScreen> {
           TextFormField(
             controller: _emailCodeController,
             decoration: InputDecoration(
-              labelText: '인증코드 6자리',
+              labelText: tr(
+                'ui.userfront.signup.auth.code_label',
+                fallback: '인증코드 6자리',
+              ),
               suffixText: _formatTime(_emailSeconds),
               border: const OutlineInputBorder(),
             ),
@@ -658,19 +795,40 @@ class _SignupScreenState extends State<SignupScreen> {
             onChanged: (val) { if(val.length == 6) _verifyEmailCode(); },
           ),
         ],
-        if (_isEmailVerified) const Padding(
-          padding: EdgeInsets.only(top: 8),
-          child: Text('✅ 이메일 인증 완료', style: TextStyle(color: Colors.green, fontSize: 13, fontWeight: FontWeight.bold)),
-        ),
+        if (_isEmailVerified)
+          Padding(
+            padding: const EdgeInsets.only(top: 8),
+            child: Text(
+              tr(
+                'msg.userfront.signup.email.verified',
+                fallback: '✅ 이메일 인증 완료',
+              ),
+              style: const TextStyle(
+                color: Colors.green,
+                fontSize: 13,
+                fontWeight: FontWeight.bold,
+              ),
+            ),
+          ),
         const SizedBox(height: 24),
-        Text('휴대폰 인증', style: const TextStyle(fontWeight: FontWeight.bold)),
+        Text(
+          tr('ui.userfront.signup.phone.title', fallback: '휴대폰 인증'),
+          style: const TextStyle(fontWeight: FontWeight.bold),
+        ),
         const SizedBox(height: 8),
         Row(
           children: [
             Expanded(
               child: TextFormField(
                 controller: _phoneController,
-                decoration: InputDecoration(labelText: '휴대폰 번호 (-없이)', border: const OutlineInputBorder(), errorText: _phoneError),
+                decoration: InputDecoration(
+                  labelText: tr(
+                    'ui.userfront.signup.phone.label',
+                    fallback: '휴대폰 번호 (-없이)',
+                  ),
+                  border: const OutlineInputBorder(),
+                  errorText: _phoneError,
+                ),
                 readOnly: _isPhoneVerified,
                 keyboardType: TextInputType.phone,
               ),
@@ -681,7 +839,14 @@ class _SignupScreenState extends State<SignupScreen> {
               child: ElevatedButton(
                 onPressed: (_isPhoneVerified || _isLoading) ? null : _sendPhoneCode,
                 style: ElevatedButton.styleFrom(backgroundColor: Colors.grey[100], foregroundColor: Colors.black, elevation: 0),
-                child: Text(_phoneSeconds > 0 ? '재발송' : '인증요청'),
+                child: Text(
+                  _phoneSeconds > 0
+                      ? tr('ui.common.resend', fallback: '재발송')
+                      : tr(
+                          'ui.userfront.signup.auth.request_code',
+                          fallback: '인증요청',
+                        ),
+                ),
               ),
             ),
           ],
@@ -691,7 +856,10 @@ class _SignupScreenState extends State<SignupScreen> {
           TextFormField(
             controller: _phoneCodeController,
             decoration: InputDecoration(
-              labelText: '인증코드 6자리',
+              labelText: tr(
+                'ui.userfront.signup.auth.code_label',
+                fallback: '인증코드 6자리',
+              ),
               suffixText: _formatTime(_phoneSeconds),
               border: const OutlineInputBorder(),
             ),
@@ -700,10 +868,21 @@ class _SignupScreenState extends State<SignupScreen> {
             onChanged: (val) { if(val.length == 6) _verifyPhoneCode(); },
           ),
         ],
-        if (_isPhoneVerified) const Padding(
-          padding: EdgeInsets.only(top: 8),
-          child: Text('✅ 휴대폰 인증 완료', style: TextStyle(color: Colors.green, fontSize: 13, fontWeight: FontWeight.bold)),
-        ),
+        if (_isPhoneVerified)
+          Padding(
+            padding: const EdgeInsets.only(top: 8),
+            child: Text(
+              tr(
+                'msg.userfront.signup.phone.verified',
+                fallback: '✅ 휴대폰 인증 완료',
+              ),
+              style: const TextStyle(
+                color: Colors.green,
+                fontSize: 13,
+                fontWeight: FontWeight.bold,
+              ),
+            ),
+          ),
       ],
     );
   }
@@ -712,12 +891,24 @@ class _SignupScreenState extends State<SignupScreen> {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
-        Text('회원님의\n소속 정보를 알려주세요', style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
+        Text(
+          tr(
+            'msg.userfront.signup.profile.title',
+            fallback: '회원님의\n소속 정보를 알려주세요',
+          ),
+          style: const TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
+        ),
         const SizedBox(height: 24),
         TextFormField(
           controller: _nameController,
           onChanged: (_) => setState(() {}),
-          decoration: const InputDecoration(labelText: '이름', border: OutlineInputBorder()),
+          decoration: InputDecoration(
+            labelText: tr(
+              'ui.userfront.signup.profile.name',
+              fallback: '이름',
+            ),
+            border: const OutlineInputBorder(),
+          ),
         ),
         const SizedBox(height: 16),
         // 소속 유형 선택 (가족사 메일일 경우 비활성화)
@@ -726,17 +917,51 @@ class _SignupScreenState extends State<SignupScreen> {
           child: Opacity(
             opacity: _isAffiliateEmail ? 0.7 : 1.0,
             child: DropdownButtonFormField<String>(
-              value: _affiliationType,
+              key: ValueKey(_affiliationType),
+              initialValue: _affiliationType,
               decoration: InputDecoration(
-                labelText: '소속 유형', 
+                labelText: tr(
+                  'ui.userfront.signup.profile.affiliation_type',
+                  fallback: '소속 유형',
+                ),
                 border: const OutlineInputBorder(),
-                helperText: _isAffiliateEmail ? '가족사 이메일 사용 시 자동으로 선택됩니다.' : null,
+                helperText: _isAffiliateEmail
+                    ? tr(
+                        'msg.userfront.signup.profile.affiliate_hint',
+                        fallback: '가족사 이메일 사용 시 자동으로 선택됩니다.',
+                      )
+                    : null,
               ),
-              items: const [
-                DropdownMenuItem(value: 'GENERAL', child: Text('일반 사용자')),
-                DropdownMenuItem(value: 'AFFILIATE', child: Text('가족사 임직원')),
+              items: [
+                DropdownMenuItem(
+                  value: 'GENERAL',
+                  child: Text(
+                    tr(
+                      'domain.affiliation.general',
+                      fallback: '일반 사용자',
+                    ),
+                  ),
+                ),
+                DropdownMenuItem(
+                  value: 'AFFILIATE',
+                  child: Text(
+                    tr(
+                      'domain.affiliation.affiliate',
+                      fallback: '가족사 임직원',
+                    ),
+                  ),
+                ),
               ],
-              onChanged: _isAffiliateEmail ? null : (val) => setState(() { _affiliationType = val!; }),
+              onChanged: _isAffiliateEmail
+                  ? null
+                  : (val) {
+                      if (val == null) {
+                        return;
+                      }
+                      setState(() {
+                        _affiliationType = val;
+                      });
+                    },
             ),
           ),
         ),
@@ -748,17 +973,56 @@ class _SignupScreenState extends State<SignupScreen> {
             child: Opacity(
               opacity: _isAffiliateEmail ? 0.7 : 1.0,
               child: DropdownButtonFormField<String>(
-                value: _companyCode,
-                decoration: const InputDecoration(labelText: '가족사 선택', border: OutlineInputBorder()),
-                items: const [
-                  DropdownMenuItem(value: 'HANMAC', child: Text('한맥')),
-                  DropdownMenuItem(value: 'SAMAN', child: Text('삼안')),
-                  DropdownMenuItem(value: 'PTC', child: Text('PTC')),
-                  DropdownMenuItem(value: 'JANGHEON', child: Text('장헌')),
-                  DropdownMenuItem(value: 'BARON', child: Text('바론')),
-                  DropdownMenuItem(value: 'HALLA', child: Text('한라')),
+                key: ValueKey(_companyCode ?? 'none'),
+                initialValue: _companyCode,
+                decoration: InputDecoration(
+                  labelText: tr(
+                    'ui.userfront.signup.profile.company',
+                    fallback: '가족사 선택',
+                  ),
+                  border: const OutlineInputBorder(),
+                ),
+                items: [
+                  DropdownMenuItem(
+                    value: 'HANMAC',
+                    child: Text(
+                      tr('domain.company.hanmac', fallback: '한맥'),
+                    ),
+                  ),
+                  DropdownMenuItem(
+                    value: 'SAMAN',
+                    child: Text(
+                      tr('domain.company.saman', fallback: '삼안'),
+                    ),
+                  ),
+                  DropdownMenuItem(
+                    value: 'PTC',
+                    child: Text(
+                      tr('domain.company.ptc', fallback: 'PTC'),
+                    ),
+                  ),
+                  DropdownMenuItem(
+                    value: 'JANGHEON',
+                    child: Text(
+                      tr('domain.company.jangheon', fallback: '장헌'),
+                    ),
+                  ),
+                  DropdownMenuItem(
+                    value: 'BARON',
+                    child: Text(
+                      tr('domain.company.baron', fallback: '바론'),
+                    ),
+                  ),
+                  DropdownMenuItem(
+                    value: 'HALLA',
+                    child: Text(
+                      tr('domain.company.halla', fallback: '한라'),
+                    ),
+                  ),
                 ],
-                onChanged: _isAffiliateEmail ? null : (val) => setState(() => _companyCode = val),
+                onChanged: _isAffiliateEmail
+                    ? null
+                    : (val) => setState(() => _companyCode = val),
               ),
             ),
           ),
@@ -768,7 +1032,12 @@ class _SignupScreenState extends State<SignupScreen> {
           controller: _deptController,
           onChanged: (_) => setState(() {}),
           decoration: InputDecoration(
-            labelText: _affiliationType == 'AFFILIATE' ? '부서명' : '소속 정보 (선택)',
+            labelText: _affiliationType == 'AFFILIATE'
+                ? tr('ui.userfront.signup.profile.department', fallback: '부서명')
+                : tr(
+                    'ui.userfront.signup.profile.department_optional',
+                    fallback: '소속 정보 (선택)',
+                  ),
             border: const OutlineInputBorder()
           ),
         ),
@@ -778,7 +1047,10 @@ class _SignupScreenState extends State<SignupScreen> {
 
   String _buildPolicyDescription() {
     if (_isPolicyLoading) {
-      return "비밀번호 정책을 불러오는 중입니다...";
+      return tr(
+        'msg.userfront.signup.policy.loading',
+        fallback: '비밀번호 정책을 불러오는 중입니다...',
+      );
     }
     final minLength = (_policy?['minLength'] as int?) ?? 12;
     final minTypes = (_policy?['minCharacterTypes'] as int?) ?? 0;
@@ -787,16 +1059,60 @@ class _SignupScreenState extends State<SignupScreen> {
     final requiresNumber = _policy?['number'] ?? true;
     final requiresSymbol = _policy?['nonAlphanumeric'] ?? true;
 
-    final parts = <String>["최소 $minLength자 이상"];
+    final parts = <String>[
+      tr(
+        'msg.userfront.signup.policy.min_length',
+        fallback: '최소 {{count}}자 이상',
+        params: {'count': minLength.toString()},
+      ),
+    ];
     if (minTypes > 0) {
-      parts.add("영문 대/소문자/숫자/특수문자 중 ${minTypes}가지 이상");
+      parts.add(
+        tr(
+          'msg.userfront.signup.policy.min_types',
+          fallback: '영문 대/소문자/숫자/특수문자 중 {{count}}가지 이상',
+          params: {'count': minTypes.toString()},
+        ),
+      );
+    }
+    if (requiresUpper) {
+      parts.add(
+        tr(
+          'msg.userfront.signup.policy.uppercase',
+          fallback: '대문자',
+        ),
+      );
+    }
+    if (requiresLower) {
+      parts.add(
+        tr(
+          'msg.userfront.signup.policy.lowercase',
+          fallback: '소문자',
+        ),
+      );
+    }
+    if (requiresNumber) {
+      parts.add(
+        tr(
+          'msg.userfront.signup.policy.number',
+          fallback: '숫자',
+        ),
+      );
+    }
+    if (requiresSymbol) {
+      parts.add(
+        tr(
+          'msg.userfront.signup.policy.symbol',
+          fallback: '특수문자',
+        ),
+      );
     }
-    if (requiresUpper) parts.add("대문자");
-    if (requiresLower) parts.add("소문자");
-    if (requiresNumber) parts.add("숫자");
-    if (requiresSymbol) parts.add("특수문자");
 
-    return "보안 정책: ${parts.join(', ')}";
+    return tr(
+      'msg.userfront.signup.policy.summary',
+      fallback: '보안 정책: {{rules}}',
+      params: {'rules': parts.join(', ')},
+    );
   }
 
   Widget _buildStepPassword() {
@@ -825,7 +1141,13 @@ class _SignupScreenState extends State<SignupScreen> {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
-        Text('마지막으로\n비밀번호를 설정해주세요', style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
+        Text(
+          tr(
+            'msg.userfront.signup.password.title',
+            fallback: '마지막으로\n비밀번호를 설정해주세요',
+          ),
+          style: const TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
+        ),
         const SizedBox(height: 16),
         // 비밀번호 정책 안내 박스
         Container(
@@ -850,7 +1172,10 @@ class _SignupScreenState extends State<SignupScreen> {
           obscureText: true,
           onChanged: (_) => setState(() {}),
           decoration: InputDecoration(
-            labelText: '비밀번호',
+            labelText: tr(
+              'ui.userfront.signup.password.label',
+              fallback: '비밀번호',
+            ),
             border: const OutlineInputBorder(),
             errorText: _passwordError,
           ),
@@ -859,12 +1184,55 @@ class _SignupScreenState extends State<SignupScreen> {
         Wrap(
           spacing: 10,
           children: [
-            _cryptoCheck('$minLength자 이상', hasLength),
-            if (minTypes > 0) _cryptoCheck('문자 유형 ${minTypes}가지 이상', hasTypeCount),
-            if (requiresUpper) _cryptoCheck('대문자', hasUpper),
-            if (requiresLower) _cryptoCheck('소문자', hasLower),
-            if (requiresNumber) _cryptoCheck('숫자', hasDigit),
-            if (requiresSymbol) _cryptoCheck('특수문자', hasSpecial),
+            _cryptoCheck(
+              tr(
+                'msg.userfront.signup.password.rule.min_length',
+                fallback: '{{count}}자 이상',
+                params: {'count': minLength.toString()},
+              ),
+              hasLength,
+            ),
+            if (minTypes > 0)
+              _cryptoCheck(
+                tr(
+                  'msg.userfront.signup.password.rule.min_types',
+                  fallback: '문자 유형 {{count}}가지 이상',
+                  params: {'count': minTypes.toString()},
+                ),
+                hasTypeCount,
+              ),
+            if (requiresUpper)
+              _cryptoCheck(
+                tr(
+                  'msg.userfront.signup.password.rule.uppercase',
+                  fallback: '대문자',
+                ),
+                hasUpper,
+              ),
+            if (requiresLower)
+              _cryptoCheck(
+                tr(
+                  'msg.userfront.signup.password.rule.lowercase',
+                  fallback: '소문자',
+                ),
+                hasLower,
+              ),
+            if (requiresNumber)
+              _cryptoCheck(
+                tr(
+                  'msg.userfront.signup.password.rule.number',
+                  fallback: '숫자',
+                ),
+                hasDigit,
+              ),
+            if (requiresSymbol)
+              _cryptoCheck(
+                tr(
+                  'msg.userfront.signup.password.rule.symbol',
+                  fallback: '특수문자',
+                ),
+                hasSpecial,
+              ),
           ],
         ),
         const SizedBox(height: 16),
@@ -873,11 +1241,19 @@ class _SignupScreenState extends State<SignupScreen> {
           obscureText: true,
           onChanged: (val) {
             setState(() {
-              _confirmPasswordError = (val != _passwordController.text) ? '비밀번호가 일치하지 않습니다.' : null;
+              _confirmPasswordError = (val != _passwordController.text)
+                  ? tr(
+                      'msg.userfront.signup.password.mismatch',
+                      fallback: '비밀번호가 일치하지 않습니다.',
+                    )
+                  : null;
             });
           },
           decoration: InputDecoration(
-            labelText: '비밀번호 확인', 
+            labelText: tr(
+              'ui.userfront.signup.password.confirm_label',
+              fallback: '비밀번호 확인',
+            ), 
             border: const OutlineInputBorder(),
             errorText: _confirmPasswordError,
           ),
@@ -917,7 +1293,10 @@ class _SignupScreenState extends State<SignupScreen> {
     return Scaffold(
       backgroundColor: Colors.white,
       appBar: AppBar(
-        title: Text('회원가입', style: TextStyle(fontWeight: FontWeight.bold)),
+        title: Text(
+          tr('ui.userfront.signup.title', fallback: '회원가입'),
+          style: const TextStyle(fontWeight: FontWeight.bold),
+        ),
         elevation: 0,
         backgroundColor: Colors.white,
         foregroundColor: Colors.black,
@@ -951,7 +1330,10 @@ class _SignupScreenState extends State<SignupScreen> {
                       child: OutlinedButton(
                         onPressed: () => setState(() => _currentStep--),
                         style: OutlinedButton.styleFrom(minimumSize: const Size.fromHeight(55), side: const BorderSide(color: Colors.black)),
-                        child: const Text('이전', style: TextStyle(color: Colors.black)),
+                        child: Text(
+                          tr('ui.common.prev', fallback: '이전'),
+                          style: const TextStyle(color: Colors.black),
+                        ),
                       ),
                     ),
                     const SizedBox(width: 12),
@@ -967,7 +1349,11 @@ class _SignupScreenState extends State<SignupScreen> {
                       ),
                       child: _isLoading 
                         ? const SizedBox(height: 20, width: 20, child: CircularProgressIndicator(color: Colors.white, strokeWidth: 2))
-                        : Text(_currentStep < 4 ? '다음 단계' : '가입 완료'),
+                        : Text(
+                            _currentStep < 4
+                                ? tr('ui.userfront.signup.next_step', fallback: '다음 단계')
+                                : tr('ui.userfront.signup.complete', fallback: '가입 완료'),
+                          ),
                     ),
                   ),
                 ],

userfront/lib/features/dashboard/domain/dashboard_providers.dart

@@ -3,9 +3,9 @@ import 'dart:convert';
 import 'package:flutter_dotenv/flutter_dotenv.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
-import '../../../../core/services/auth_proxy_service.dart';
 import '../../../../core/services/auth_token_store.dart';
 import '../../../../core/services/http_client.dart';
+import 'package:userfront/i18n.dart';
 import 'models.dart';
 
 String _envOrDefault(String key, String fallback) {
@@ -17,19 +17,6 @@ String _envOrDefault(String key, String fallback) {
 
 String get _baseUrl => _envOrDefault('BACKEND_URL', 'https://sso.hmac.kr');
 
-Future<List<LinkedRp>> _fetchLinkedRps() async {
-  final items = await AuthProxyService.fetchLinkedRps();
-  final result = <LinkedRp>[];
-  for (final item in items) {
-    if (item is Map) {
-      result.add(LinkedRp.fromJson(Map<String, dynamic>.from(item)));
-    }
-  }
-  return result;
-}
-
-
-
 Future<AuditPage> _fetchAuthTimelinePage({String? cursor}) async {
   final queryParameters = <String, String>{
     'limit': '20',
@@ -192,7 +179,10 @@ class AuthTimelineNotifier extends Notifier<AuthTimelineState> {
       state = state.copyWith(
         isLoading: false,
         isLoadingMore: false,
-        error: '접속이력을 불러오지 못했습니다.',
+        error: tr(
+          'msg.userfront.dashboard.timeline.load_error',
+          fallback: '접속이력을 불러오지 못했습니다.',
+        ),
       );
     }
   }

userfront/lib/features/profile/data/repositories/profile_repository.dart

@@ -1,5 +1,6 @@
 import 'dart:convert';
 import 'package:flutter_dotenv/flutter_dotenv.dart';
+import 'package:userfront/i18n.dart';
 import '../models/user_profile_model.dart';
 import '../../../../core/services/auth_token_store.dart';
 import '../../../../core/services/http_client.dart';
@@ -23,7 +24,9 @@ class ProfileRepository {
     final token = await _getToken();
     final useCookie = AuthTokenStore.usesCookie();
     if (token == null && !useCookie) {
-      throw Exception('No active session');
+      throw Exception(
+        tr('err.userfront.session.missing', fallback: '활성 세션이 없습니다.'),
+      );
     }
 
     final url = Uri.parse('$_baseUrl/api/v1/user/me');
@@ -40,7 +43,13 @@ class ProfileRepository {
     if (response.statusCode == 200) {
       return UserProfile.fromJson(jsonDecode(response.body));
     } else {
-      throw Exception('Failed to load profile: ${response.body}');
+      throw Exception(
+        tr(
+          'err.userfront.profile.load_failed',
+          fallback: '프로필을 불러오지 못했습니다: {{error}}',
+          params: {'error': response.body},
+        ),
+      );
     }
   }
 
@@ -51,7 +60,11 @@ class ProfileRepository {
   }) async {
     final token = await _getToken();
     final useCookie = AuthTokenStore.usesCookie();
-    if (token == null && !useCookie) throw Exception('No active session');
+    if (token == null && !useCookie) {
+      throw Exception(
+        tr('err.userfront.session.missing', fallback: '활성 세션이 없습니다.'),
+      );
+    }
 
     final url = Uri.parse('$_baseUrl/api/v1/user/me');
     final client = createHttpClient(withCredentials: useCookie);
@@ -73,14 +86,24 @@ class ProfileRepository {
     client.close();
 
     if (response.statusCode != 200) {
-      throw Exception('Failed to update profile: ${response.body}');
+      throw Exception(
+        tr(
+          'err.userfront.profile.update_failed',
+          fallback: '프로필 업데이트에 실패했습니다: {{error}}',
+          params: {'error': response.body},
+        ),
+      );
     }
   }
 
   Future<void> sendUpdateCode(String phone) async {
     final token = await _getToken();
     final useCookie = AuthTokenStore.usesCookie();
-    if (token == null && !useCookie) throw Exception('No active session');
+    if (token == null && !useCookie) {
+      throw Exception(
+        tr('err.userfront.session.missing', fallback: '활성 세션이 없습니다.'),
+      );
+    }
 
     final url = Uri.parse('$_baseUrl/api/v1/user/me/send-code');
     final client = createHttpClient(withCredentials: useCookie);
@@ -98,7 +121,13 @@ class ProfileRepository {
     client.close();
 
     if (response.statusCode != 200) {
-      throw Exception('인증번호 전송 실패: ${response.body}');
+      throw Exception(
+        tr(
+          'err.userfront.profile.send_code_failed',
+          fallback: '인증번호 전송 실패: {{error}}',
+          params: {'error': response.body},
+        ),
+      );
     }
   }
 
@@ -108,7 +137,11 @@ class ProfileRepository {
   }) async {
     final token = await _getToken();
     final useCookie = AuthTokenStore.usesCookie();
-    if (token == null && !useCookie) throw Exception('No active session');
+    if (token == null && !useCookie) {
+      throw Exception(
+        tr('err.userfront.session.missing', fallback: '활성 세션이 없습니다.'),
+      );
+    }
 
     final url = Uri.parse('$_baseUrl/api/v1/user/me/password');
     final client = createHttpClient(withCredentials: useCookie);
@@ -129,14 +162,24 @@ class ProfileRepository {
     client.close();
 
     if (response.statusCode != 200) {
-      throw Exception('Failed to change password: ${response.body}');
+      throw Exception(
+        tr(
+          'err.userfront.profile.password_change_failed',
+          fallback: '비밀번호 변경에 실패했습니다: {{error}}',
+          params: {'error': response.body},
+        ),
+      );
     }
   }
 
   Future<void> verifyUpdateCode(String phone, String code) async {
     final token = await _getToken();
     final useCookie = AuthTokenStore.usesCookie();
-    if (token == null && !useCookie) throw Exception('No active session');
+    if (token == null && !useCookie) {
+      throw Exception(
+        tr('err.userfront.session.missing', fallback: '활성 세션이 없습니다.'),
+      );
+    }
 
     final url = Uri.parse('$_baseUrl/api/v1/user/me/verify-code');
     final client = createHttpClient(withCredentials: useCookie);
@@ -154,7 +197,13 @@ class ProfileRepository {
     client.close();
 
     if (response.statusCode != 200) {
-      throw Exception('인증 실패: ${response.body}');
+      throw Exception(
+        tr(
+          'err.userfront.profile.verify_code_failed',
+          fallback: '인증 실패: {{error}}',
+          params: {'error': response.body},
+        ),
+      );
     }
   }
 }

userfront/lib/features/profile/presentation/pages/profile_page.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
+import 'package:userfront/i18n.dart';
 import '../../../../core/notifiers/auth_notifier.dart';
 import '../../../../core/services/auth_token_store.dart';
 import '../../../../core/ui/layout_breakpoints.dart';
@@ -229,14 +230,29 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
       });
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(content: Text('인증번호가 전송되었습니다.')),
+          SnackBar(
+            content: Text(
+              tr(
+                'msg.userfront.profile.phone.code_sent',
+                fallback: '인증번호가 전송되었습니다.',
+              ),
+            ),
+          ),
         );
       }
     } catch (e) {
       setState(() => _isVerifying = false);
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text('전송 실패: $e')),
+          SnackBar(
+            content: Text(
+              tr(
+                'msg.userfront.profile.phone.send_failed',
+                fallback: '전송 실패: {{error}}',
+                params: {'error': e.toString()},
+              ),
+            ),
+          ),
         );
       }
     }
@@ -256,7 +272,14 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
       });
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(content: Text('인증되었습니다.')),
+          SnackBar(
+            content: Text(
+              tr(
+                'msg.userfront.profile.phone.verified',
+                fallback: '인증되었습니다.',
+              ),
+            ),
+          ),
         );
       }
       if (_editingField == 'phone') {
@@ -266,7 +289,15 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
       setState(() => _isVerifying = false);
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text('인증 실패: $e')),
+          SnackBar(
+            content: Text(
+              tr(
+                'msg.userfront.profile.phone.verify_failed',
+                fallback: '인증 실패: {{error}}',
+                params: {'error': e.toString()},
+              ),
+            ),
+          ),
         );
       }
     }
@@ -279,15 +310,24 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
     final confirmPassword = _confirmPasswordController?.text.trim() ?? '';
 
     if (currentPassword.isEmpty) {
-      setState(() => _passwordError = '현재 비밀번호를 입력해 주세요.');
+      setState(() => _passwordError = tr(
+            'msg.userfront.profile.password.current_required',
+            fallback: '현재 비밀번호를 입력해 주세요.',
+          ));
       return;
     }
     if (newPassword.isEmpty) {
-      setState(() => _passwordError = '새 비밀번호를 입력해 주세요.');
+      setState(() => _passwordError = tr(
+            'msg.userfront.profile.password.new_required',
+            fallback: '새 비밀번호를 입력해 주세요.',
+          ));
       return;
     }
     if (newPassword != confirmPassword) {
-      setState(() => _passwordError = '새 비밀번호가 일치하지 않습니다.');
+      setState(() => _passwordError = tr(
+            'msg.userfront.profile.password.mismatch',
+            fallback: '새 비밀번호가 일치하지 않습니다.',
+          ));
       return;
     }
 
@@ -306,12 +346,19 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
       _newPasswordController?.clear();
       _confirmPasswordController?.clear();
       setState(() {
-        _passwordSuccess = '비밀번호가 변경되었습니다.';
+        _passwordSuccess = tr(
+          'msg.userfront.profile.password.changed',
+          fallback: '비밀번호가 변경되었습니다.',
+        );
       });
     } catch (e) {
       final message = e.toString().replaceFirst('Exception: ', '');
       setState(() {
-        _passwordError = '비밀번호 변경 실패: $message';
+        _passwordError = tr(
+          'msg.userfront.profile.password.change_failed',
+          fallback: '비밀번호 변경 실패: {{error}}',
+          params: {'error': message},
+        );
       });
     } finally {
       if (mounted) {
@@ -385,26 +432,54 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
 
     if (_editingField == 'name' && nextName.isEmpty) {
       ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(content: Text('이름을 입력해주세요.')),
+        SnackBar(
+          content: Text(
+            tr(
+              'msg.userfront.profile.name_required',
+              fallback: '이름을 입력해주세요.',
+            ),
+          ),
+        ),
       );
       return;
     }
     if (_editingField == 'department' && nextDepartment.isEmpty) {
       ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(content: Text('소속을 입력해주세요.')),
+        SnackBar(
+          content: Text(
+            tr(
+              'msg.userfront.profile.department_required',
+              fallback: '소속을 입력해주세요.',
+            ),
+          ),
+        ),
       );
       return;
     }
     if (_editingField == 'phone') {
       if (nextPhone.isEmpty) {
         ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(content: Text('휴대폰 번호를 입력해주세요.')),
+          SnackBar(
+            content: Text(
+              tr(
+                'msg.userfront.profile.phone_required',
+                fallback: '휴대폰 번호를 입력해주세요.',
+              ),
+            ),
+          ),
         );
         return;
       }
       if (_isPhoneChanged && !_isPhoneVerified) {
         ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(content: Text('휴대폰 번호 인증이 필요합니다.')),
+          SnackBar(
+            content: Text(
+              tr(
+                'msg.userfront.profile.phone_verify_required',
+                fallback: '휴대폰 번호 인증이 필요합니다.',
+              ),
+            ),
+          ),
         );
         return;
       }
@@ -441,13 +516,28 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
           _departmentTouched = false;
         });
         ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(content: Text('정보가 수정되었습니다.')),
+          SnackBar(
+            content: Text(
+              tr(
+                'msg.userfront.profile.update_success',
+                fallback: '정보가 수정되었습니다.',
+              ),
+            ),
+          ),
         );
       }
     } catch (e) {
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text('수정 실패: $e')),
+          SnackBar(
+            content: Text(
+              tr(
+                'msg.userfront.profile.update_failed',
+                fallback: '수정 실패: {{error}}',
+                params: {'error': e.toString()},
+              ),
+            ),
+          ),
         );
       }
     } finally {
@@ -461,24 +551,32 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
       children: [
         ListTile(
           leading: const Icon(Icons.home_outlined),
-          title: const Text('대시보드'),
+          title: Text(
+            tr('ui.userfront.nav.dashboard', fallback: '대시보드'),
+          ),
           onTap: () => context.go('/'),
         ),
         ListTile(
           leading: const Icon(Icons.person_outline),
-          title: const Text('내 정보'),
+          title: Text(
+            tr('ui.userfront.nav.profile', fallback: '내 정보'),
+          ),
           selected: true,
           onTap: () => context.go('/profile'),
         ),
         ListTile(
           leading: const Icon(Icons.qr_code_scanner),
-          title: const Text('QR 스캔'),
+          title: Text(
+            tr('ui.userfront.nav.qr_scan', fallback: 'QR 스캔'),
+          ),
           onTap: () => context.go('/scan'),
         ),
         const Divider(),
         ListTile(
           leading: const Icon(Icons.logout),
-          title: const Text('로그아웃'),
+          title: Text(
+            tr('ui.userfront.nav.logout', fallback: '로그아웃'),
+          ),
           onTap: _logout,
         ),
       ],
@@ -525,9 +623,15 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
   }
 
   Widget _buildHeaderCard(UserProfile profile) {
-    final name = profile.name.isEmpty ? '이름 없음' : profile.name;
-    final email = profile.email.isEmpty ? '이메일 없음' : profile.email;
-    final department = profile.department.isEmpty ? '소속 정보 없음' : profile.department;
+    final name = profile.name.isEmpty
+        ? tr('msg.userfront.profile.name_missing', fallback: '이름 없음')
+        : profile.name;
+    final email = profile.email.isEmpty
+        ? tr('msg.userfront.profile.email_missing', fallback: '이메일 없음')
+        : profile.email;
+    final department = profile.department.isEmpty
+        ? tr('msg.userfront.profile.department_missing', fallback: '소속 정보 없음')
+        : profile.department;
 
     return Container(
       width: double.infinity,
@@ -538,7 +642,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
         border: Border.all(color: _border),
         boxShadow: [
           BoxShadow(
-            color: Colors.black.withOpacity(0.04),
+            color: Colors.black.withValues(alpha: 10),
             blurRadius: 18,
             offset: const Offset(0, 8),
           ),
@@ -556,8 +660,16 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
                 Text(
-                  '안녕하세요, $name님',
-                  style: const TextStyle(fontSize: 20, fontWeight: FontWeight.w700, color: _ink),
+                  tr(
+                    'msg.userfront.profile.greeting',
+                    fallback: '안녕하세요, {{name}}님',
+                    params: {'name': name},
+                  ),
+                  style: const TextStyle(
+                    fontSize: 20,
+                    fontWeight: FontWeight.w700,
+                    color: _ink,
+                  ),
                 ),
                 const SizedBox(height: 6),
                 Text(email, style: TextStyle(color: Colors.grey[600], fontSize: 14)),
@@ -566,7 +678,10 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
                   spacing: 8,
                   runSpacing: 8,
                   children: [
-                    _buildInfoChip(Icons.badge_outlined, '프로필 관리'),
+                    _buildInfoChip(
+                      Icons.badge_outlined,
+                      tr('ui.userfront.profile.manage', fallback: '프로필 관리'),
+                    ),
                     _buildInfoChip(Icons.apartment, profile.tenant?.name ?? department),
                   ],
                 ),
@@ -588,7 +703,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
         border: Border.all(color: _border),
         boxShadow: [
           BoxShadow(
-            color: Colors.black.withOpacity(0.03),
+            color: Colors.black.withValues(alpha: 8),
             blurRadius: 12,
             offset: const Offset(0, 6),
           ),
@@ -605,7 +720,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
       title: Text(label),
       subtitle: Text(displayValue),
       trailing: Text(
-        '읽기 전용',
+        tr('ui.common.read_only', fallback: '읽기 전용'),
         style: TextStyle(color: Colors.grey[500], fontSize: 12),
       ),
     );
@@ -629,7 +744,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
         subtitle: Text(displayValue),
         trailing: TextButton(
           onPressed: isUpdating ? null : () => _startEditing(field, profile),
-          child: const Text('수정'),
+          child: Text(tr('ui.common.edit', fallback: '수정')),
         ),
       );
     }
@@ -657,7 +772,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
             const SizedBox(width: 12),
             OutlinedButton(
               onPressed: isUpdating ? null : () => _cancelEditing(profile),
-              child: const Text('취소'),
+              child: Text(tr('ui.common.cancel', fallback: '취소')),
             ),
           ],
         ),
@@ -672,11 +787,13 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
     if (!isEditing) {
       return ListTile(
         contentPadding: EdgeInsets.zero,
-        title: const Text('전화번호'),
+        title: Text(
+          tr('ui.userfront.profile.phone.title', fallback: '전화번호'),
+        ),
         subtitle: Text(displayValue),
         trailing: TextButton(
           onPressed: isUpdating ? null : () => _startEditing('phone', profile),
-          child: const Text('수정'),
+          child: Text(tr('ui.common.edit', fallback: '수정')),
         ),
       );
     }
@@ -684,7 +801,10 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
-        const Text('전화번호', style: TextStyle(fontWeight: FontWeight.w600)),
+        Text(
+          tr('ui.userfront.profile.phone.title', fallback: '전화번호'),
+          style: const TextStyle(fontWeight: FontWeight.w600),
+        ),
         const SizedBox(height: 8),
         Row(
           crossAxisAlignment: CrossAxisAlignment.end,
@@ -710,12 +830,19 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
             if (_isPhoneChanged && !_isPhoneVerified)
               ElevatedButton(
                 onPressed: _isVerifying ? null : _sendCode,
-                child: Text(_isCodeSent ? '재전송' : '인증요청'),
+                child: Text(
+                  _isCodeSent
+                      ? tr('ui.common.resend', fallback: '재전송')
+                      : tr(
+                          'ui.userfront.profile.phone.request_code',
+                          fallback: '인증요청',
+                        ),
+                ),
               ),
             const SizedBox(width: 8),
             OutlinedButton(
               onPressed: isUpdating ? null : () => _cancelEditing(profile),
-              child: const Text('취소'),
+              child: Text(tr('ui.common.cancel', fallback: '취소')),
             ),
           ],
         ),
@@ -731,26 +858,32 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
                   keyboardType: TextInputType.number,
                   textInputAction: TextInputAction.done,
                   onSubmitted: (_) => _verifyCode(profile),
-                  decoration: const InputDecoration(
-                    border: OutlineInputBorder(),
-                    hintText: '인증번호 6자리',
+                  decoration: InputDecoration(
+                    border: const OutlineInputBorder(),
+                    hintText: tr(
+                      'ui.userfront.profile.phone.code_hint',
+                      fallback: '인증번호 6자리',
+                    ),
                   ),
                 ),
               ),
               const SizedBox(width: 8),
               ElevatedButton(
                 onPressed: _isVerifying ? null : () => _verifyCode(profile),
-                child: const Text('확인'),
+                child: Text(tr('ui.common.confirm', fallback: '확인')),
               ),
             ],
           ),
         ],
         if (_isPhoneChanged && !_isPhoneVerified)
-          const Padding(
-            padding: EdgeInsets.only(top: 8.0),
+          Padding(
+            padding: const EdgeInsets.only(top: 8.0),
             child: Text(
-              '휴대폰 번호를 변경하려면 SMS 인증이 필요합니다.',
-              style: TextStyle(color: Colors.orange, fontSize: 12),
+              tr(
+                'msg.userfront.profile.phone.verify_notice',
+                fallback: '휴대폰 번호를 변경하려면 SMS 인증이 필요합니다.',
+              ),
+              style: const TextStyle(color: Colors.orange, fontSize: 12),
             ),
           ),
       ],
@@ -763,20 +896,26 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
           Text(
-            '비밀번호 변경',
+            tr('ui.userfront.profile.password.title', fallback: '비밀번호 변경'),
             style: const TextStyle(fontSize: 16, fontWeight: FontWeight.w700),
           ),
           const SizedBox(height: 8),
-          const Text(
-            '현재 비밀번호 확인 후 새 비밀번호로 변경합니다.',
-            style: TextStyle(color: Color(0xFF6B7280)),
+          Text(
+            tr(
+              'msg.userfront.profile.password.subtitle',
+              fallback: '현재 비밀번호 확인 후 새 비밀번호로 변경합니다.',
+            ),
+            style: const TextStyle(color: Color(0xFF6B7280)),
           ),
           const SizedBox(height: 16),
           TextField(
             controller: _currentPasswordController,
             obscureText: !_showCurrentPassword,
             decoration: InputDecoration(
-              labelText: '현재 비밀번호',
+              labelText: tr(
+                'ui.userfront.profile.password.current',
+                fallback: '현재 비밀번호',
+              ),
               border: const OutlineInputBorder(),
               suffixIcon: IconButton(
                 icon: Icon(_showCurrentPassword ? Icons.visibility_off : Icons.visibility),
@@ -791,7 +930,10 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
             controller: _newPasswordController,
             obscureText: !_showNewPassword,
             decoration: InputDecoration(
-              labelText: '새 비밀번호',
+              labelText: tr(
+                'ui.userfront.profile.password.new',
+                fallback: '새 비밀번호',
+              ),
               border: const OutlineInputBorder(),
               suffixIcon: IconButton(
                 icon: Icon(_showNewPassword ? Icons.visibility_off : Icons.visibility),
@@ -806,7 +948,10 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
             controller: _confirmPasswordController,
             obscureText: !_showConfirmPassword,
             decoration: InputDecoration(
-              labelText: '새 비밀번호 확인',
+              labelText: tr(
+                'ui.userfront.profile.password.confirm',
+                fallback: '새 비밀번호 확인',
+              ),
               border: const OutlineInputBorder(),
               suffixIcon: IconButton(
                 icon: Icon(_showConfirmPassword ? Icons.visibility_off : Icons.visibility),
@@ -841,12 +986,22 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
                         height: 18,
                         child: CircularProgressIndicator(strokeWidth: 2),
                       )
-                    : const Text('비밀번호 변경'),
+                    : Text(
+                        tr(
+                          'ui.userfront.profile.password.change',
+                          fallback: '비밀번호 변경',
+                        ),
+                      ),
               ),
               const SizedBox(width: 12),
               TextButton(
                 onPressed: () => context.go('/recovery'),
-                child: const Text('비밀번호를 잊으셨나요?'),
+                child: Text(
+                  tr(
+                    'ui.userfront.profile.password.forgot',
+                    fallback: '비밀번호를 잊으셨나요?',
+                  ),
+                ),
               ),
             ],
           ),
@@ -869,55 +1024,88 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
                 children: [
                   _buildHeaderCard(profile),
                   const SizedBox(height: 28),
-                  _buildSectionTitle('기본 정보', '계정 기본 정보를 관리합니다.'),
+                  _buildSectionTitle(
+                    tr('ui.userfront.profile.section.basic', fallback: '기본 정보'),
+                    tr(
+                      'msg.userfront.profile.section.basic',
+                      fallback: '계정 기본 정보를 관리합니다.',
+                    ),
+                  ),
                   const SizedBox(height: 12),
                   _buildCard(
                     Column(
                       children: [
                         _buildEditableTile(
                           field: 'name',
-                          label: '이름',
+                          label: tr('ui.userfront.profile.field.name', fallback: '이름'),
                           value: profile.name,
                           profile: profile,
                           isUpdating: isUpdating,
                           controller: _nameController!,
                         ),
                         const Divider(height: 24),
-                        _buildReadOnlyTile('이메일', profile.email),
+                        _buildReadOnlyTile(
+                          tr('ui.userfront.profile.field.email', fallback: '이메일'),
+                          profile.email,
+                        ),
                         const Divider(height: 24),
                         _buildPhoneEditor(profile, isUpdating),
                       ],
                     ),
                   ),
                   const SizedBox(height: 28),
-                  _buildSectionTitle('조직 정보', '소속 및 구분 정보입니다.'),
+                  _buildSectionTitle(
+                    tr('ui.userfront.profile.section.organization', fallback: '조직 정보'),
+                    tr(
+                      'msg.userfront.profile.section.organization',
+                      fallback: '소속 및 구분 정보입니다.',
+                    ),
+                  ),
                   const SizedBox(height: 12),
                   _buildCard(
                     Column(
                       children: [
                         _buildEditableTile(
                           field: 'department',
-                          label: '소속',
+                          label: tr('ui.userfront.profile.field.department', fallback: '소속'),
                           value: profile.department,
                           profile: profile,
                           isUpdating: isUpdating,
                           controller: _departmentController!,
                         ),
                         const Divider(height: 24),
-                        _buildReadOnlyTile('구분', profile.affiliationType),
+                        _buildReadOnlyTile(
+                          tr('ui.userfront.profile.field.affiliation', fallback: '구분'),
+                          profile.affiliationType,
+                        ),
                         if (profile.tenant != null) ...[
                           const Divider(height: 24),
-                          _buildReadOnlyTile('소속 테넌트', profile.tenant!.name),
+                          _buildReadOnlyTile(
+                            tr(
+                              'ui.userfront.profile.field.tenant',
+                              fallback: '소속 테넌트',
+                            ),
+                            profile.tenant!.name,
+                          ),
                         ],
                         if (profile.companyCode.isNotEmpty) ...[
                           const Divider(height: 24),
-                          _buildReadOnlyTile('회사코드', profile.companyCode),
+                          _buildReadOnlyTile(
+                            tr('ui.userfront.profile.field.company_code', fallback: '회사코드'),
+                            profile.companyCode,
+                          ),
                         ],
                       ],
                     ),
                   ),
                   const SizedBox(height: 28),
-                  _buildSectionTitle('보안', '비밀번호를 안전하게 관리합니다.'),
+                  _buildSectionTitle(
+                    tr('ui.userfront.profile.section.security', fallback: '보안'),
+                    tr(
+                      'msg.userfront.profile.section.security',
+                      fallback: '비밀번호를 안전하게 관리합니다.',
+                    ),
+                  ),
                   const SizedBox(height: 12),
                   _buildPasswordSection(),
                   if (isUpdating || _isVerifying) ...[
@@ -943,18 +1131,25 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
     final profile = profileState.value ?? _cachedProfile;
     if (profile == null) {
       return Scaffold(
-        appBar: AppBar(title: const Text('내 정보')),
+        appBar: AppBar(
+          title: Text(tr('ui.userfront.nav.profile', fallback: '내 정보')),
+        ),
         body: profileState.isLoading
             ? const Center(child: CircularProgressIndicator())
             : Center(
                 child: Column(
                   mainAxisAlignment: MainAxisAlignment.center,
                   children: [
-                    const Text('정보를 불러올 수 없습니다.'),
+                    Text(
+                      tr(
+                        'msg.userfront.profile.load_failed',
+                        fallback: '정보를 불러올 수 없습니다.',
+                      ),
+                    ),
                     const SizedBox(height: 16),
                     ElevatedButton(
                       onPressed: () => ref.read(profileProvider.notifier).loadProfile(),
-                      child: const Text('재시도'),
+                      child: Text(tr('ui.common.retry', fallback: '재시도')),
                     ),
                   ],
                 ),
@@ -971,8 +1166,8 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
       backgroundColor: _subtle,
       appBar: AppBar(
         title: Text(
-          'Baron 로그인',
-          style: TextStyle(fontWeight: FontWeight.bold),
+          tr('ui.userfront.app_title', fallback: 'Baron 로그인'),
+          style: const TextStyle(fontWeight: FontWeight.bold),
         ),
         elevation: 0,
         backgroundColor: _surface,
@@ -980,17 +1175,17 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
         actions: [
           IconButton(
             icon: const Icon(Icons.home_outlined),
-            tooltip: '대시보드',
+            tooltip: tr('ui.userfront.nav.dashboard', fallback: '대시보드'),
             onPressed: () => context.go('/'),
           ),
           IconButton(
             icon: const Icon(Icons.qr_code_scanner),
-            tooltip: 'QR 스캔',
+            tooltip: tr('ui.userfront.nav.qr_scan', fallback: 'QR 스캔'),
             onPressed: () => context.push('/scan'),
           ),
           IconButton(
             icon: const Icon(Icons.logout),
-            tooltip: '로그아웃',
+            tooltip: tr('ui.userfront.nav.logout', fallback: '로그아웃'),
             onPressed: _logout,
           ),
         ],

userfront/lib/i18n.dart

@@ -0,0 +1,40 @@
+import 'dart:ui';
+
+import 'i18n_data.dart';
+
+const _defaultLocale = 'ko';
+const _supportedLocales = ['ko', 'en'];
+
+String _resolveLocale() {
+  final locale = PlatformDispatcher.instance.locale;
+  final code = locale.languageCode.toLowerCase();
+  if (_supportedLocales.contains(code)) {
+    return code;
+  }
+  return _defaultLocale;
+}
+
+String _formatTemplate(String template, Map<String, String>? params) {
+  if (params == null || params.isEmpty) {
+    return template;
+  }
+  var result = template;
+  params.forEach((key, value) {
+    result = result.replaceAll('{{$key}}', value);
+  });
+  return result;
+}
+
+String tr(
+  String key, {
+  String? fallback,
+  Map<String, String>? params,
+}) {
+  final locale = _resolveLocale();
+  final map = locale == 'en' ? enStrings : koStrings;
+  final value = map[key];
+  final template = (value != null && value.isNotEmpty)
+      ? value
+      : (fallback ?? key);
+  return _formatTemplate(template, params);
+}

userfront/lib/main.dart

@@ -21,6 +21,7 @@ import 'core/services/logger_service.dart';
 import 'core/notifiers/auth_notifier.dart';
 import 'package:logging/logging.dart';
 import 'features/auth/presentation/consent_screen.dart';
+import 'i18n.dart';
 
 final _log = Logger('Main');
 
@@ -200,9 +201,12 @@ final _router = GoRouter(
       path: '/settings',
       builder: (context, state) {
         _routerLogger.info("Navigating to /settings (disabled)");
-        return const ErrorScreen(
+        return ErrorScreen(
           errorCode: 'settings_disabled',
-          description: '현재 계정 설정 화면은 준비 중입니다.',
+          description: tr(
+            'msg.userfront.settings.disabled',
+            fallback: '현재 계정 설정 화면은 준비 중입니다.',
+          ),
         );
       },
     ),
@@ -295,7 +299,7 @@ class BaronSSOApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return MaterialApp.router(
-      title: 'Baron 로그인',
+      title: tr('ui.userfront.app_title', fallback: 'Baron 로그인'),
       theme: ThemeData(
         colorScheme: ColorScheme.fromSeed(
           seedColor: const Color(0xFF1A1F2C), // Dark Navy/Black base

userfront/pubspec.lock

@@ -156,7 +156,7 @@ packages:
     source: sdk
     version: "0.0.0"
   flutter_web_plugins:
-    dependency: transitive
+    dependency: "direct main"
     description: flutter
     source: sdk
     version: "0.0.0"

userfront/pubspec.yaml

@@ -30,6 +30,8 @@ environment:
 dependencies:
     flutter:
         sdk: flutter
+    flutter_web_plugins:
+        sdk: flutter
 
     # The following adds the Cupertino Icons font to your application.
     # Use with the CupertinoIcons class for iOS style icons.

userfront/test/dashboard_providers_test.dart

@@ -1,8 +1,11 @@
+import 'dart:ui';
+
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import 'package:userfront/features/dashboard/domain/dashboard_providers.dart';
 import 'package:userfront/features/dashboard/domain/models.dart';
+import 'package:userfront/i18n.dart';
 
 AuditLogEntry _log(String id) {
   return AuditLogEntry.fromJson({
@@ -21,6 +24,14 @@ Future<void> _drainMicrotasks() async {
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
+  final dispatcher = TestWidgetsFlutterBinding.instance.platformDispatcher;
+  dispatcher.localeTestValue = const Locale('ko');
+  dispatcher.localesTestValue = const [Locale('ko')];
+
+  tearDownAll(() {
+    dispatcher.clearLocaleTestValue();
+    dispatcher.clearLocalesTestValue();
+  });
 
   test('AuthTimelineNotifier는 초기 페이지를 로드한다', () async {
     final cursors = <String?>[];
@@ -103,7 +114,13 @@ void main() {
 
     final state = container.read(authTimelineProvider);
     expect(state.items.isEmpty, true);
-    expect(state.error, '접속이력을 불러오지 못했습니다.');
+    expect(
+      state.error,
+      tr(
+        'msg.userfront.dashboard.timeline.load_error',
+        fallback: '접속이력을 불러오지 못했습니다.',
+      ),
+    );
     container.dispose();
   });
 }

userfront/test/error_screen_test.dart

@@ -1,6 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:userfront/core/constants/error_whitelist.dart';
 import 'package:userfront/features/auth/presentation/error_screen.dart';
+import 'package:userfront/i18n.dart';
 
 Future<void> _pumpErrorScreen(
   WidgetTester tester, {
@@ -21,6 +23,19 @@ Future<void> _pumpErrorScreen(
 }
 
 void main() {
+  setUpAll(() {
+    TestWidgetsFlutterBinding.ensureInitialized();
+    final dispatcher = TestWidgetsFlutterBinding.instance.platformDispatcher;
+    dispatcher.localeTestValue = const Locale('ko');
+    dispatcher.localesTestValue = const [Locale('ko')];
+  });
+
+  tearDownAll(() {
+    final dispatcher = TestWidgetsFlutterBinding.instance.platformDispatcher;
+    dispatcher.clearLocaleTestValue();
+    dispatcher.clearLocalesTestValue();
+  });
+
   testWidgets('개발환경은 원문 메시지를 노출한다', (WidgetTester tester) async {
     await _pumpErrorScreen(
       tester,
@@ -29,9 +44,20 @@ void main() {
       isProdOverride: false,
     );
 
-    expect(find.text('오류: custom_error'), findsOneWidget);
+    final title = tr(
+      'msg.userfront.error.title_with_code',
+      fallback: '오류: {{code}}',
+      params: {'code': 'custom_error'},
+    );
+    final type = tr(
+      'msg.userfront.error.type',
+      fallback: '오류 종류: {{type}}',
+      params: {'type': 'custom_error'},
+    );
+
+    expect(find.text(title), findsOneWidget);
     expect(find.text('원문 메시지'), findsOneWidget);
-    expect(find.text('오류 종류: custom_error'), findsOneWidget);
+    expect(find.text(type), findsOneWidget);
   });
 
   testWidgets('프로덕션은 whitelist 메시지를 노출한다', (WidgetTester tester) async {
@@ -42,10 +68,24 @@ void main() {
       isProdOverride: true,
     );
 
-    expect(find.text('인증 과정에서 오류가 발생했습니다'), findsOneWidget);
-    expect(find.text('현재 계정 설정 화면은 준비 중입니다.'), findsOneWidget);
+    final title = tr(
+      'msg.userfront.error.title',
+      fallback: '인증 과정에서 오류가 발생했습니다',
+    );
+    final detail = tr(
+      'msg.userfront.error.whitelist.settings_disabled',
+      fallback: errorWhitelistMessages['settings_disabled']!,
+    );
+    final type = tr(
+      'msg.userfront.error.type',
+      fallback: '오류 종류: {{type}}',
+      params: {'type': 'settings_disabled'},
+    );
+
+    expect(find.text(title), findsOneWidget);
+    expect(find.text(detail), findsOneWidget);
     expect(find.text('원문 메시지'), findsNothing);
-    expect(find.text('오류 종류: settings_disabled'), findsOneWidget);
+    expect(find.text(type), findsOneWidget);
   });
 
   testWidgets('프로덕션은 비허용 에러를 unknown_error로 처리한다', (WidgetTester tester) async {
@@ -56,9 +96,23 @@ void main() {
       isProdOverride: true,
     );
 
-    expect(find.text('인증 과정에서 오류가 발생했습니다'), findsOneWidget);
-    expect(find.text('에러가 계속되면 관리자에게 문의해주세요'), findsOneWidget);
+    final title = tr(
+      'msg.userfront.error.title',
+      fallback: '인증 과정에서 오류가 발생했습니다',
+    );
+    final detail = tr(
+      'msg.userfront.error.detail_contact',
+      fallback: '에러가 계속되면 관리자에게 문의해주세요',
+    );
+    final type = tr(
+      'msg.userfront.error.type',
+      fallback: '오류 종류: {{type}}',
+      params: {'type': 'unknown_error'},
+    );
+
+    expect(find.text(title), findsOneWidget);
+    expect(find.text(detail), findsOneWidget);
     expect(find.text('원문 메시지'), findsNothing);
-    expect(find.text('오류 종류: unknown_error'), findsOneWidget);
+    expect(find.text(type), findsOneWidget);
   });
 }