feat(settings): SMS 읽기 권한 상태/요청 위젯 추가 (Android)

- 설정 화면에 SMS 권한 카드 추가: 상태 표시(허용/미허용/영구 거부), 권한 요청/설정 이동 지원\n- 기존 알림 권한 카드 스타일과 일관성 유지

feat(permissions): 최초 실행 시 SMS 권한 온보딩 화면 추가 및 Splash에서 라우팅 (Android)

- 권한 필요 이유/수집 범위 현지화 문구 추가\n- 거부/영구거부 케이스 처리 및 설정 이동

chore(codex): AGENTS.md/체크 스크립트/CI/프롬프트 템플릿 추가

- AGENTS.md, scripts/check.sh, scripts/fix.sh, .github/workflows/flutter_ci.yml, .claude/agents/codex.md, 문서 템플릿 추가

refactor(logging): 경로별 print 제거 후 경량 로거(Log) 도입

- SMS 스캐너/컨트롤러, URL 매처, 데이터 리포지토리, 내비게이션, 메모리/성능 유틸 등 핵심 경로 치환

feat(exchange): 환율 API URL을 --dart-define로 오버라이드 가능 + 폴백 로깅 강화

test: URL 매처/환율 스모크 테스트 추가

chore(android): RECEIVE_SMS 권한 제거 (READ_SMS만 유지)

fix(lints): dart fix + 수동 정리로 경고 대폭 감소, 비동기 context(mounted) 보강

fix(deprecations):\n- flutter_local_notifications의 androidAllowWhileIdle → androidScheduleMode 전환\n- WillPopScope → PopScope 교체

i18n: SMS 권한 온보딩/설정 문구 현지화 키 추가

android/app/src/main/AndroidManifest.xml

@@ -1,6 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <uses-permission android:name="android.permission.READ_SMS" />
-    <uses-permission android:name="android.permission.RECEIVE_SMS" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
     <application
         android:label="구독 관리"

assets/data/text.json

@@ -217,6 +217,17 @@
     "enterAmount": "Enter amount",
     "invalidAmount": "Please enter a valid amount",
     "featureComingSoon": "This feature is coming soon"
+    ,
+    "smsPermissionTitle": "Request SMS Permission",
+    "smsPermissionReasonTitle": "Why",
+    "smsPermissionReasonBody": "We analyze payment-related SMS to auto-detect subscriptions. Processing happens locally only.",
+    "smsPermissionScopeTitle": "Scope",
+    "smsPermissionScopeBody": "We scan only payment-related SMS patterns (service/amount/date) locally; no data leaves your device.",
+    "permanentlyDeniedMessage": "Permission is permanently denied. Enable it in Settings.",
+    "openSettings": "Open Settings",
+    "later": "Later",
+    "requesting": "Requesting...",
+    "smsPermissionLabel": "SMS Permission"
   },
   "ko": {
     "appTitle": "디지털 월세 관리자",
@@ -436,6 +447,17 @@
     "enterAmount": "금액을 입력하세요",
     "invalidAmount": "올바른 금액을 입력해주세요",
     "featureComingSoon": "이 기능은 곧 출시됩니다"
+    ,
+    "smsPermissionTitle": "SMS 권한 요청",
+    "smsPermissionReasonTitle": "이유",
+    "smsPermissionReasonBody": "문자 메시지에서 반복 결제 내역을 분석해 구독 서비스를 자동으로 탐지합니다. 모든 처리는 기기 내에서만 이루어집니다.",
+    "smsPermissionScopeTitle": "수집 범위",
+    "smsPermissionScopeBody": "결제 관련 문자 메시지의 패턴(서비스명/금액/날짜)만 로컬에서 처리하며, 외부로 전송하지 않습니다.",
+    "permanentlyDeniedMessage": "권한이 영구적으로 거부되었습니다. 설정에서 권한을 허용해주세요.",
+    "openSettings": "설정 열기",
+    "later": "나중에 하기",
+    "requesting": "요청 중...",
+    "smsPermissionLabel": "SMS 권한"
   },
   "ja": {
     "appTitle": "デジタル月額管理者",

lib/controllers/add_subscription_controller.dart

@@ -2,7 +2,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter/foundation.dart' show kIsWeb, kDebugMode;
 import 'package:provider/provider.dart';
 import 'package:intl/intl.dart';
-import '../models/subscription_model.dart';
 import '../providers/subscription_provider.dart';
 import '../providers/category_provider.dart';
 import '../services/sms_service.dart';
@@ -183,6 +182,7 @@ class AddSubscriptionController {
       }
     } catch (e) {
       if (kDebugMode) {
+        // ignore: avoid_print
         print('AddSubscriptionController: URL 자동 매칭 중 오류 - $e');
       }
     }
@@ -320,6 +320,7 @@ class AddSubscriptionController {
               await SubscriptionUrlMatcher.extractServiceFromSms(smsContent);
         } catch (e) {
           if (kDebugMode) {
+            // ignore: avoid_print
             print('AddSubscriptionController: SMS 서비스 추출 실패 - $e');
           }
         }

lib/controllers/detail_screen_controller.dart

@@ -401,7 +401,7 @@ class DetailScreenController extends ChangeNotifier {
 
     debugPrint('[DetailScreenController] 구독 업데이트 시작: '
         '${subscription.serviceName} → ${serviceNameController.text}, '
-        '금액: ${subscription.monthlyCost} → $monthlyCost ${_currency}');
+        '금액: $subscription.monthlyCost → $monthlyCost $_currency');
 
     subscription.serviceName = serviceNameController.text;
     subscription.monthlyCost = monthlyCost;
@@ -460,12 +460,14 @@ class DetailScreenController extends ChangeNotifier {
         serviceName: subscription.serviceName,
         locale: locale,
       );
+      if (!context.mounted) return;
 
       // 삭제 확인 다이얼로그 표시
       final shouldDelete = await DeleteConfirmationDialog.show(
         context: context,
         serviceName: displayName,
       );
+      if (!context.mounted) return;
 
       if (!shouldDelete) return;
 
@@ -529,6 +531,7 @@ class DetailScreenController extends ChangeNotifier {
       }
     } catch (e) {
       if (kDebugMode) {
+        // ignore: avoid_print
         print('DetailScreenController: 해지 페이지 열기 실패 - $e');
       }
 

lib/controllers/sms_scan_controller.dart

@@ -1,11 +1,11 @@
 import 'package:flutter/material.dart';
 import '../services/sms_scanner.dart';
 import '../models/subscription.dart';
-import '../models/subscription_model.dart';
 import '../services/sms_scan/subscription_converter.dart';
 import '../services/sms_scan/subscription_filter.dart';
 import '../providers/subscription_provider.dart';
 import 'package:provider/provider.dart';
+import '../utils/logger.dart';
 import '../providers/navigation_provider.dart';
 import '../providers/category_provider.dart';
 import '../l10n/app_localizations.dart';
@@ -58,20 +58,20 @@ class SmsScanController extends ChangeNotifier {
 
     try {
       // SMS 스캔 실행
-      print('SMS 스캔 시작');
+      Log.i('SMS 스캔 시작');
       final scannedSubscriptionModels =
           await _smsScanner.scanForSubscriptions();
-      print('스캔된 구독: ${scannedSubscriptionModels.length}개');
+      Log.d('스캔된 구독: ${scannedSubscriptionModels.length}개');
 
       if (scannedSubscriptionModels.isNotEmpty) {
-        print(
+        Log.d(
             '첫 번째 구독: ${scannedSubscriptionModels[0].serviceName}, 반복 횟수: ${scannedSubscriptionModels[0].repeatCount}');
       }
 
       if (!context.mounted) return;
 
       if (scannedSubscriptionModels.isEmpty) {
-        print('스캔된 구독이 없음');
+        Log.i('스캔된 구독이 없음');
         _errorMessage = AppLocalizations.of(context).subscriptionNotFound;
         _isLoading = false;
         notifyListeners();
@@ -85,15 +85,15 @@ class SmsScanController extends ChangeNotifier {
       // 2회 이상 반복 결제된 구독만 필터링
       final repeatSubscriptions =
           _filter.filterByRepeatCount(scannedSubscriptions, 2);
-      print('반복 결제된 구독: ${repeatSubscriptions.length}개');
+      Log.d('반복 결제된 구독: ${repeatSubscriptions.length}개');
 
       if (repeatSubscriptions.isNotEmpty) {
-        print(
+        Log.d(
             '첫 번째 반복 구독: ${repeatSubscriptions[0].serviceName}, 반복 횟수: ${repeatSubscriptions[0].repeatCount}');
       }
 
       if (repeatSubscriptions.isEmpty) {
-        print('반복 결제된 구독이 없음');
+        Log.i('반복 결제된 구독이 없음');
         _errorMessage = AppLocalizations.of(context).repeatSubscriptionNotFound;
         _isLoading = false;
         notifyListeners();
@@ -104,21 +104,21 @@ class SmsScanController extends ChangeNotifier {
       final provider =
           Provider.of<SubscriptionProvider>(context, listen: false);
       final existingSubscriptions = provider.subscriptions;
-      print('기존 구독: ${existingSubscriptions.length}개');
+      Log.d('기존 구독: ${existingSubscriptions.length}개');
 
       // 중복 구독 필터링
       final filteredSubscriptions =
           _filter.filterDuplicates(repeatSubscriptions, existingSubscriptions);
-      print('중복 제거 후 구독: ${filteredSubscriptions.length}개');
+      Log.d('중복 제거 후 구독: ${filteredSubscriptions.length}개');
 
       if (filteredSubscriptions.isNotEmpty) {
-        print(
+        Log.d(
             '첫 번째 필터링된 구독: ${filteredSubscriptions[0].serviceName}, 반복 횟수: ${filteredSubscriptions[0].repeatCount}');
       }
 
       // 중복 제거 후 신규 구독이 없는 경우
       if (filteredSubscriptions.isEmpty) {
-        print('중복 제거 후 신규 구독이 없음');
+        Log.i('중복 제거 후 신규 구독이 없음');
         _isLoading = false;
         notifyListeners();
         return;
@@ -129,7 +129,7 @@ class SmsScanController extends ChangeNotifier {
       websiteUrlController.text = ''; // URL 입력 필드 초기화
       notifyListeners();
     } catch (e) {
-      print('SMS 스캔 중 오류 발생: $e');
+      Log.e('SMS 스캔 중 오류 발생', e);
       if (context.mounted) {
         _errorMessage =
             AppLocalizations.of(context).smsScanErrorWithMessage(e.toString());
@@ -159,7 +159,7 @@ class SmsScanController extends ChangeNotifier {
           ? websiteUrlController.text.trim()
           : subscription.websiteUrl;
 
-      print(
+      Log.d(
           '구독 추가 시도: ${subscription.serviceName}, 카테고리: $finalCategoryId, URL: $websiteUrl');
 
       // addSubscription 호출
@@ -176,19 +176,20 @@ class SmsScanController extends ChangeNotifier {
         currency: subscription.currency,
       );
 
-      print('구독 추가 성공: ${subscription.serviceName}');
-
+      Log.i('구독 추가 성공: ${subscription.serviceName}');
+      if (!context.mounted) return;
       moveToNextSubscription(context);
     } catch (e) {
-      print('구독 추가 중 오류 발생: $e');
+      Log.e('구독 추가 중 오류 발생', e);
       // 오류가 있어도 다음 구독으로 이동
+      if (!context.mounted) return;
       moveToNextSubscription(context);
     }
   }
 
   void skipCurrentSubscription(BuildContext context) {
     final subscription = _scannedSubscriptions[_currentIndex];
-    print('구독 건너뛰기: ${subscription.serviceName}');
+    Log.i('구독 건너뛰기: ${subscription.serviceName}');
     moveToNextSubscription(context);
   }
 
@@ -224,7 +225,7 @@ class SmsScanController extends ChangeNotifier {
       (cat) => cat.name == 'other',
       orElse: () => categoryProvider.categories.first,
     );
-    print('기본 카테고리 설정: ${otherCategory.name} (ID: ${otherCategory.id})');
+    Log.d('기본 카테고리 설정: ${otherCategory.name} (ID: ${otherCategory.id})');
     return otherCategory.id;
   }
 

lib/l10n/app_localizations.dart

@@ -63,6 +63,28 @@ class AppLocalizations {
   String get notifications =>
       _localizedStrings['notifications'] ?? 'Notifications';
   String get appLock => _localizedStrings['appLock'] ?? 'App Lock';
+  // SMS 권한 온보딩/설정
+  String get smsPermissionTitle =>
+      _localizedStrings['smsPermissionTitle'] ?? 'Request SMS Permission';
+  String get smsPermissionReasonTitle =>
+      _localizedStrings['smsPermissionReasonTitle'] ?? 'Why';
+  String get smsPermissionReasonBody =>
+      _localizedStrings['smsPermissionReasonBody'] ??
+      'We analyze payment-related SMS to auto-detect subscriptions. Processing happens locally only.';
+  String get smsPermissionScopeTitle =>
+      _localizedStrings['smsPermissionScopeTitle'] ?? 'Scope';
+  String get smsPermissionScopeBody =>
+      _localizedStrings['smsPermissionScopeBody'] ??
+      'We scan only payment-related SMS patterns (service/amount/date) locally; no data leaves your device.';
+  String get permanentlyDeniedMessage =>
+      _localizedStrings['permanentlyDeniedMessage'] ??
+      'Permission is permanently denied. Enable it in Settings.';
+  String get openSettings =>
+      _localizedStrings['openSettings'] ?? 'Open Settings';
+  String get later => _localizedStrings['later'] ?? 'Later';
+  String get requesting => _localizedStrings['requesting'] ?? 'Requesting...';
+  String get smsPermissionLabel =>
+      _localizedStrings['smsPermissionLabel'] ?? 'SMS Permission';
   // 알림 설정
   String get notificationPermission =>
       _localizedStrings['notificationPermission'] ?? 'Notification Permission';
@@ -308,11 +330,11 @@ class AppLocalizations {
 
   String subscriptionCount(int count) {
     if (locale.languageCode == 'ko') {
-      return '${count}개';
+      return '$count개';
     } else if (locale.languageCode == 'ja') {
-      return '${count}個';
+      return '$count個';
     } else if (locale.languageCode == 'zh') {
-      return '${count}个';
+      return '$count个';
     } else {
       return count.toString();
     }
@@ -444,11 +466,11 @@ class AppLocalizations {
 
   String servicesInProgress(int count) {
     if (locale.languageCode == 'ko') {
-      return '${count}개 진행중';
+      return '$count개 진행중';
     } else if (locale.languageCode == 'ja') {
-      return '${count}個進行中';
+      return '$count個進行中';
     } else if (locale.languageCode == 'zh') {
-      return '${count}个进行中';
+      return '$count个进行中';
     } else {
       return '$count in progress';
     }

lib/main.dart

@@ -22,6 +22,7 @@ import 'package:google_mobile_ads/google_mobile_ads.dart';
 import 'dart:io' show Platform;
 import 'dart:async' show unawaited;
 import 'utils/memory_manager.dart';
+import 'utils/logger.dart';
 import 'utils/performance_optimizer.dart';
 import 'navigator_key.dart';
 
@@ -48,12 +49,12 @@ Future<void> main() async {
     await DefaultCacheManager().emptyCache();
 
     if (kDebugMode) {
-      print('이미지 캐시 관리 초기화 완료');
+      Log.d('이미지 캐시 관리 초기화 완료');
       PerformanceOptimizer.checkConstOptimization();
     }
   } catch (e) {
     if (kDebugMode) {
-      print('캐시 초기화 오류: $e');
+      Log.e('캐시 초기화 오류', e);
     }
   }
 

lib/providers/subscription_provider.dart

@@ -28,7 +28,7 @@ class SubscriptionProvider extends ChangeNotifier {
         final price = subscription.currentPrice;
         if (subscription.currency == 'USD') {
           debugPrint('[SubscriptionProvider] ${subscription.serviceName}: '
-              '\$${price} × ₩$rate = ₩${price * rate}');
+              '\$$price × ₩$rate = ₩${price * rate}');
           return sum + (price * rate);
         }
         debugPrint(
@@ -264,7 +264,7 @@ class SubscriptionProvider extends ChangeNotifier {
     for (final subscription in _subscriptions) {
       final currentPrice = subscription.currentPrice;
       debugPrint('[calculateTotalExpense] ${subscription.serviceName}: '
-          '${currentPrice} ${subscription.currency} (이벤트 적용: ${subscription.isCurrentlyInEvent})');
+          '$currentPrice ${subscription.currency} (이벤트 적용: ${subscription.isCurrentlyInEvent})');
 
       final converted = await ExchangeRateService().convertBetweenCurrencies(
         currentPrice,
@@ -310,7 +310,7 @@ class SubscriptionProvider extends ChangeNotifier {
           final cost = subscription.currentPrice;
           debugPrint(
               '[getMonthlyExpenseData] 현재 월 - ${subscription.serviceName}: '
-              '${cost} ${subscription.currency} (이벤트 적용: ${subscription.isCurrentlyInEvent})');
+              '$cost ${subscription.currency} (이벤트 적용: ${subscription.isCurrentlyInEvent})');
 
           // 통화 변환
           final converted =
@@ -508,19 +508,17 @@ class SubscriptionProvider extends ChangeNotifier {
               .id;
         }
 
-        if (categoryId != null) {
-          subscription.categoryId = categoryId;
-          await subscription.save();
-          migratedCount++;
-          final categoryName =
-              categories.firstWhere((cat) => cat.id == categoryId).name;
-          debugPrint('✅ ${subscription.serviceName} → $categoryName');
-        }
+        subscription.categoryId = categoryId;
+        await subscription.save();
+        migratedCount++;
+        final categoryName =
+            categories.firstWhere((cat) => cat.id == categoryId).name;
+        debugPrint('✅ ${subscription.serviceName} → $categoryName');
       }
     }
 
     if (migratedCount > 0) {
-      debugPrint('❎ 총 ${migratedCount}개의 구독에 categoryId 할당 완료');
+      debugPrint('❎ 총 $migratedCount개의 구독에 categoryId 할당 완료');
       await refreshSubscriptions();
     } else {
       debugPrint('❎ 모든 구독이 이미 categoryId를 가지고 있습니다');

lib/screens/analysis_screen.dart

@@ -169,7 +169,7 @@ class _AnalysisScreenState extends State<AnalysisScreen>
 
         // 2. 총 지출 요약 카드
         TotalExpenseSummaryCard(
-          key: ValueKey('total_expense_${_lastDataHash}'),
+          key: ValueKey('total_expense_$_lastDataHash'),
           subscriptions: subscriptions,
           totalExpense: _totalExpense,
           animationController: _animationController,
@@ -179,7 +179,7 @@ class _AnalysisScreenState extends State<AnalysisScreen>
 
         // 3. 월별 지출 차트
         MonthlyExpenseChartCard(
-          key: ValueKey('monthly_expense_${_lastDataHash}'),
+          key: ValueKey('monthly_expense_$_lastDataHash'),
           monthlyData: _monthlyData,
           animationController: _animationController,
         ),

lib/screens/app_lock_screen.dart

@@ -13,13 +13,13 @@ class AppLockScreen extends StatelessWidget {
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            Icon(
+            const Icon(
               Icons.lock_outline,
               size: 80,
               color: AppColors.navyGray,
             ),
             const SizedBox(height: 24),
-            Text(
+            const Text(
               '앱이 잠겨 있습니다',
               style: TextStyle(
                 fontSize: 24,
@@ -28,7 +28,7 @@ class AppLockScreen extends StatelessWidget {
               ),
             ),
             const SizedBox(height: 16),
-            Text(
+            const Text(
               '생체 인증으로 잠금을 해제하세요',
               style: TextStyle(
                 fontSize: 16,
@@ -42,7 +42,7 @@ class AppLockScreen extends StatelessWidget {
                 final success = await appLock.authenticate();
                 if (!success && context.mounted) {
                   ScaffoldMessenger.of(context).showSnackBar(
-                    SnackBar(
+                    const SnackBar(
                       content: Text(
                         '인증에 실패했습니다. 다시 시도해주세요.',
                         style: TextStyle(

lib/screens/category_management_screen.dart

@@ -43,7 +43,7 @@ class _CategoryManagementScreenState extends State<CategoryManagementScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text(
+        title: const Text(
           '카테고리 관리',
           style: TextStyle(
             color: AppColors.pureWhite,
@@ -66,7 +66,7 @@ class _CategoryManagementScreenState extends State<CategoryManagementScreen> {
                       children: [
                         TextFormField(
                           controller: _nameController,
-                          decoration: InputDecoration(
+                          decoration: const InputDecoration(
                             labelText: '카테고리 이름',
                             labelStyle: TextStyle(
                               color: AppColors.navyGray,
@@ -82,7 +82,7 @@ class _CategoryManagementScreenState extends State<CategoryManagementScreen> {
                         const SizedBox(height: 16),
                         DropdownButtonFormField<String>(
                           value: _selectedColor,
-                          decoration: InputDecoration(
+                          decoration: const InputDecoration(
                             labelText: '색상 선택',
                             labelStyle: TextStyle(
                               color: AppColors.navyGray,
@@ -94,31 +94,31 @@ class _CategoryManagementScreenState extends State<CategoryManagementScreen> {
                                 child: Text(
                                     AppLocalizations.of(context).colorBlue,
                                     style:
-                                        TextStyle(color: AppColors.darkNavy))),
+                                        const TextStyle(color: AppColors.darkNavy))),
                             DropdownMenuItem(
                                 value: '#4CAF50',
                                 child: Text(
                                     AppLocalizations.of(context).colorGreen,
                                     style:
-                                        TextStyle(color: AppColors.darkNavy))),
+                                        const TextStyle(color: AppColors.darkNavy))),
                             DropdownMenuItem(
                                 value: '#FF9800',
                                 child: Text(
                                     AppLocalizations.of(context).colorOrange,
                                     style:
-                                        TextStyle(color: AppColors.darkNavy))),
+                                        const TextStyle(color: AppColors.darkNavy))),
                             DropdownMenuItem(
                                 value: '#F44336',
                                 child: Text(
                                     AppLocalizations.of(context).colorRed,
                                     style:
-                                        TextStyle(color: AppColors.darkNavy))),
+                                        const TextStyle(color: AppColors.darkNavy))),
                             DropdownMenuItem(
                                 value: '#9C27B0',
                                 child: Text(
                                     AppLocalizations.of(context).colorPurple,
                                     style:
-                                        TextStyle(color: AppColors.darkNavy))),
+                                        const TextStyle(color: AppColors.darkNavy))),
                           ],
                           onChanged: (value) {
                             setState(() {
@@ -129,13 +129,13 @@ class _CategoryManagementScreenState extends State<CategoryManagementScreen> {
                         const SizedBox(height: 16),
                         DropdownButtonFormField<String>(
                           value: _selectedIcon,
-                          decoration: InputDecoration(
+                          decoration: const InputDecoration(
                             labelText: '아이콘 선택',
                             labelStyle: TextStyle(
                               color: AppColors.navyGray,
                             ),
                           ),
-                          items: [
+                          items: const [
                             DropdownMenuItem(
                                 value: 'subscriptions',
                                 child: Text('구독',
@@ -171,7 +171,7 @@ class _CategoryManagementScreenState extends State<CategoryManagementScreen> {
                         const SizedBox(height: 16),
                         ElevatedButton(
                           onPressed: _addCategory,
-                          child: Text(
+                          child: const Text(
                             '카테고리 추가',
                             style: TextStyle(
                               color: AppColors.pureWhite,
@@ -201,7 +201,7 @@ class _CategoryManagementScreenState extends State<CategoryManagementScreen> {
                       title: Text(
                         provider.getLocalizedCategoryName(
                             context, category.name),
-                        style: TextStyle(
+                        style: const TextStyle(
                           color: AppColors.darkNavy,
                         ),
                       ),

lib/screens/detail_screen.dart

@@ -111,7 +111,7 @@ class _DetailScreenState extends State<DetailScreen>
                           Text(
                             AppLocalizations.of(context)
                                 .changesAppliedAfterSave,
-                            style: TextStyle(
+                            style: const TextStyle(
                               fontSize: 14,
                               color: AppColors.darkNavy,
                             ),

lib/screens/settings_screen.dart

@@ -5,7 +5,6 @@ import '../providers/notification_provider.dart';
 import 'dart:io';
 import '../services/notification_service.dart';
 import 'package:url_launcher/url_launcher.dart';
-import '../theme/adaptive_theme.dart';
 import '../widgets/glassmorphism_card.dart';
 import '../theme/app_colors.dart';
 import '../widgets/native_ad_widget.dart';
@@ -230,6 +229,7 @@ class SettingsScreen extends StatelessWidget {
                               if (granted) {
                                 await provider.setEnabled(true);
                               } else {
+                                if (!context.mounted) return;
                                 AppSnackBar.showError(
                                   context: context,
                                   message: AppLocalizations.of(context)
@@ -273,7 +273,7 @@ class SettingsScreen extends StatelessWidget {
                                     elevation: 0,
                                     color: Theme.of(context)
                                         .colorScheme
-                                        .surfaceVariant
+                                        .surfaceContainerHighest
                                         .withValues(alpha: 0.3),
                                     shape: RoundedRectangleBorder(
                                       borderRadius: BorderRadius.circular(12),
@@ -414,7 +414,7 @@ class SettingsScreen extends StatelessWidget {
                                                 decoration: BoxDecoration(
                                                   color: Theme.of(context)
                                                       .colorScheme
-                                                      .surfaceVariant
+                                                      .surfaceContainerHighest
                                                       .withValues(alpha: 0.3),
                                                   borderRadius:
                                                       BorderRadius.circular(8),
@@ -484,49 +484,77 @@ class SettingsScreen extends StatelessWidget {
                   margin:
                       const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
                   padding: const EdgeInsets.all(8),
-                  child: FutureBuilder<bool>(
-                    future: SMSService.hasSMSPermission(),
+                  child: FutureBuilder<permission.PermissionStatus>(
+                    future: permission.Permission.sms.status,
                     builder: (context, snapshot) {
-                      final hasPermission = snapshot.data ?? false;
+                      final isLoading =
+                          snapshot.connectionState == ConnectionState.waiting;
+                      final status = snapshot.data;
+                      final hasPermission = status?.isGranted ?? false;
+                      final isPermanentlyDenied =
+                          status?.isPermanentlyDenied ?? false;
+
                       return ListTile(
                         leading: const Icon(
                           Icons.sms,
                           color: AppColors.textSecondary,
                         ),
-                        title: const Text(
-                          'SMS 권한',
-                          style: TextStyle(color: AppColors.textPrimary),
+                        title: Text(
+                          AppLocalizations.of(context).smsPermissionLabel,
+                          style: const TextStyle(color: AppColors.textPrimary),
                         ),
-                        subtitle: Text(
-                          AppLocalizations.of(context).smsPermissionRequired,
-                          style:
-                              const TextStyle(color: AppColors.textSecondary),
-                        ),
-                        trailing: hasPermission
-                            ? const Padding(
-                                padding: EdgeInsets.symmetric(horizontal: 8.0),
-                                child: Icon(Icons.check_circle,
-                                    color: Colors.green),
+                        subtitle: !hasPermission
+                            ? Text(
+                                isPermanentlyDenied
+                                    ? AppLocalizations.of(context)
+                                        .permanentlyDeniedMessage
+                                    : AppLocalizations.of(context)
+                                        .smsPermissionRequired,
+                                style: const TextStyle(
+                                    color: AppColors.textSecondary),
                               )
-                            : ElevatedButton(
-                                onPressed: () async {
-                                  final granted =
-                                      await SMSService.requestSMSPermission();
-                                  if (!granted) {
-                                    final status =
-                                        await permission.Permission.sms.status;
-                                    if (status.isPermanentlyDenied) {
-                                      await permission.openAppSettings();
-                                    }
-                                  }
-                                  if (context.mounted) {
-                                    // 상태 갱신을 위해 다시 build 트리거
-                                    (context as Element).markNeedsBuild();
-                                  }
-                                },
-                                child: Text(AppLocalizations.of(context)
-                                    .requestPermission),
-                              ),
+                            : null,
+                        trailing: isLoading
+                            ? const SizedBox(
+                                width: 20,
+                                height: 20,
+                                child:
+                                    CircularProgressIndicator(strokeWidth: 2),
+                              )
+                            : hasPermission
+                                ? const Padding(
+                                    padding:
+                                        EdgeInsets.symmetric(horizontal: 8.0),
+                                    child: Icon(Icons.check_circle,
+                                        color: Colors.green),
+                                  )
+                                : isPermanentlyDenied
+                                    ? TextButton(
+                                        onPressed: () async {
+                                          await permission.openAppSettings();
+                                        },
+                                        child: Text(
+                                            AppLocalizations.of(context)
+                                                .openSettings),
+                                      )
+                                    : ElevatedButton(
+                                        onPressed: () async {
+                                          final granted = await SMSService
+                                              .requestSMSPermission();
+                                          if (!granted) {
+                                            final newStatus = await permission
+                                                .Permission.sms.status;
+                                            if (newStatus.isPermanentlyDenied) {
+                                              await permission.openAppSettings();
+                                            }
+                                          }
+                                          if (context.mounted) {
+                                            (context as Element).markNeedsBuild();
+                                          }
+                                        },
+                                        child: Text(AppLocalizations.of(context)
+                                            .requestPermission),
+                                      ),
                       );
                     },
                   ),

lib/screens/sms_permission_screen.dart

@@ -63,18 +63,18 @@ class _SmsPermissionScreenState extends State<SmsPermissionScreen> {
       context: context,
       builder: (_) => AlertDialog(
         title: Text(loc.smsPermissionRequired),
-        content: const Text('권한이 영구적으로 거부되었습니다. 설정에서 권한을 허용해주세요.'),
+        content: Text(loc.permanentlyDeniedMessage),
         actions: [
           TextButton(
             onPressed: () => Navigator.of(context).pop(),
-            child: const Text('닫기'),
+            child: Text(AppLocalizations.of(context).cancel),
           ),
           TextButton(
             onPressed: () async {
               await permission.openAppSettings();
               if (mounted) Navigator.of(context).pop();
             },
-            child: const Text('설정 열기'),
+            child: Text(loc.openSettings),
           ),
         ],
       ),
@@ -95,7 +95,7 @@ class _SmsPermissionScreenState extends State<SmsPermissionScreen> {
                 const Icon(Icons.sms, size: 64, color: AppColors.primaryColor),
                 const SizedBox(height: 16),
                 Text(
-                  'SMS 권한 요청',
+                  loc.smsPermissionTitle,
                   style: Theme.of(context).textTheme.headlineSmall?.copyWith(
                         color: AppColors.textPrimary,
                         fontWeight: FontWeight.bold,
@@ -112,16 +112,16 @@ class _SmsPermissionScreenState extends State<SmsPermissionScreen> {
                   padding: const EdgeInsets.all(16),
                   child: Column(
                     crossAxisAlignment: CrossAxisAlignment.start,
-                    children: const [
-                      Text('이유:',
-                          style: TextStyle(fontWeight: FontWeight.bold)),
-                      SizedBox(height: 8),
-                      Text('문자 메시지에서 반복 결제 내역을 분석해 구독 서비스를 자동으로 탐지합니다.'),
-                      SizedBox(height: 12),
-                      Text('수집 범위:',
-                          style: TextStyle(fontWeight: FontWeight.bold)),
-                      SizedBox(height: 8),
-                      Text('결제 관련 문자 메시지(서비스명/금액/날짜 패턴)를 로컬에서만 처리합니다.'),
+                    children: [
+                      Text(loc.smsPermissionReasonTitle,
+                          style: const TextStyle(fontWeight: FontWeight.bold)),
+                      const SizedBox(height: 8),
+                      Text(loc.smsPermissionReasonBody),
+                      const SizedBox(height: 12),
+                      Text(loc.smsPermissionScopeTitle,
+                          style: const TextStyle(fontWeight: FontWeight.bold)),
+                      const SizedBox(height: 8),
+                      Text(loc.smsPermissionScopeBody),
                     ],
                   ),
                 ),
@@ -131,15 +131,15 @@ class _SmsPermissionScreenState extends State<SmsPermissionScreen> {
                   child: ElevatedButton.icon(
                     onPressed: _requesting ? null : _handleRequest,
                     icon: const Icon(Icons.lock_open),
-                    label:
-                        Text(_requesting ? '요청 중...' : loc.requestPermission),
+                    label: Text(
+                        _requesting ? loc.requesting : loc.requestPermission),
                   ),
                 ),
                 const SizedBox(height: 8),
                 TextButton(
                   onPressed: () => Navigator.of(context)
                       .pushReplacementNamed(AppRoutes.main),
-                  child: const Text('나중에 하기'),
+                  child: Text(loc.later),
                 )
               ],
             ),

lib/screens/sms_scan_screen.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
 import '../controllers/sms_scan_controller.dart';
 import '../widgets/sms_scan/scan_loading_widget.dart';
 import '../widgets/sms_scan/scan_initial_widget.dart';

lib/screens/splash_screen.dart

@@ -277,13 +277,13 @@ class _SplashScreenState extends State<SplashScreen>
                                                       .withValues(alpha: 0.3),
                                                   width: 1.5,
                                                 ),
-                                                boxShadow: [
+                                                boxShadow: const [
                                                   BoxShadow(
                                                     color:
                                                         AppColors.shadowBlack,
                                                     spreadRadius: 0,
                                                     blurRadius: 30,
-                                                    offset: const Offset(0, 10),
+                                                    offset: Offset(0, 10),
                                                   ),
                                                 ],
                                               ),
@@ -398,7 +398,7 @@ class _SplashScreenState extends State<SplashScreen>
                                       width: 1,
                                     ),
                                   ),
-                                  child: CircularProgressIndicator(
+                                  child: const CircularProgressIndicator(
                                     valueColor: AlwaysStoppedAnimation<Color>(
                                         AppColors.pureWhite),
                                     strokeWidth: 3,

lib/services/exchange_rate_service.dart

@@ -1,6 +1,7 @@
 import 'package:http/http.dart' as http;
 import 'dart:convert';
 import 'package:intl/intl.dart';
+import '../utils/logger.dart';
 
 /// 환율 정보 서비스 클래스
 class ExchangeRateService {
@@ -21,12 +22,20 @@ class ExchangeRateService {
   double? _usdToCnyRate;
   DateTime? _lastUpdated;
 
-  // API 요청 URL (ExchangeRate-API 사용)
-  final String _apiUrl = 'https://api.exchangerate-api.com/v4/latest/USD';
+  // API 요청 URL (ExchangeRate-API 등) - 빌드 타임 오버라이드 가능
+  static const String _defaultApiUrl =
+      'https://api.exchangerate-api.com/v4/latest/USD';
+  final String _apiUrl = const String.fromEnvironment(
+    'EXCHANGE_RATE_API_URL',
+    defaultValue: _defaultApiUrl,
+  );
 
   // 기본 환율 상수
+  // ignore: constant_identifier_names
   static const double DEFAULT_USD_TO_KRW_RATE = 1350.0;
+  // ignore: constant_identifier_names
   static const double DEFAULT_USD_TO_JPY_RATE = 150.0;
+  // ignore: constant_identifier_names
   static const double DEFAULT_USD_TO_CNY_RATE = 7.2;
 
   // 캐싱된 환율 반환 (동기적)
@@ -44,18 +53,26 @@ class ExchangeRateService {
     }
 
     try {
-      // API 요청
+      // API 요청 (네트워크 불가 환경에서는 예외 발생 가능)
       final response = await http.get(Uri.parse(_apiUrl));
 
       if (response.statusCode == 200) {
         final data = json.decode(response.body);
-        _usdToKrwRate = data['rates']['KRW']?.toDouble();
-        _usdToJpyRate = data['rates']['JPY']?.toDouble();
-        _usdToCnyRate = data['rates']['CNY']?.toDouble();
+        _usdToKrwRate = (data['rates']['KRW'] as num?)?.toDouble();
+        _usdToJpyRate = (data['rates']['JPY'] as num?)?.toDouble();
+        _usdToCnyRate = (data['rates']['CNY'] as num?)?.toDouble();
         _lastUpdated = DateTime.now();
+        Log.d(
+            '환율 갱신 완료: USD→KRW=$_usdToKrwRate, JPY=$_usdToJpyRate, CNY=$_usdToCnyRate');
+        return;
+      } else {
+        Log.w(
+            '환율 API 응답 코드: ${response.statusCode} (${response.reasonPhrase})');
       }
-    } catch (e) {
-      // 오류 발생 시 기본값 사용
+    } catch (e, st) {
+      // 네트워크 실패 시 캐시/기본값 폴백
+      Log.w('환율 API 요청 실패. 캐시/기본값 사용');
+      Log.e('환율 API 에러', e, st);
     }
   }
 

lib/services/notification_service.dart

@@ -1,7 +1,6 @@
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 import 'package:timezone/timezone.dart' as tz;
 import 'package:timezone/data/latest_all.dart' as tz;
-import 'package:flutter/material.dart';
 import 'package:flutter/foundation.dart';
 import 'dart:io' show Platform;
 import '../models/subscription_model.dart';
@@ -10,7 +9,7 @@ import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 class NotificationService {
   static final FlutterLocalNotificationsPlugin _notifications =
       FlutterLocalNotificationsPlugin();
-  static final _secureStorage = const FlutterSecureStorage();
+  static const _secureStorage = FlutterSecureStorage();
 
   static const _notificationEnabledKey = 'notification_enabled';
   static const _paymentNotificationEnabledKey = 'payment_notification_enabled';
@@ -241,7 +240,7 @@ class NotificationService {
         priority: Priority.high,
       );
 
-      final iosDetails = const DarwinNotificationDetails();
+      const iosDetails = DarwinNotificationDetails();
 
       // tz.local 초기화 확인 및 재시도
       tz.Location location;
@@ -266,10 +265,10 @@ class NotificationService {
         title,
         body,
         tz.TZDateTime.from(scheduledDate, location),
-        NotificationDetails(android: androidDetails, iOS: iosDetails),
-        androidAllowWhileIdle: true,
+        const NotificationDetails(android: androidDetails, iOS: iosDetails),
         uiLocalNotificationDateInterpretation:
             UILocalNotificationDateInterpretation.absoluteTime,
+        androidScheduleMode: AndroidScheduleMode.exactAllowWhileIdle,
       );
     } catch (e) {
       debugPrint('알림 예약 중 오류 발생: $e');
@@ -351,9 +350,9 @@ class NotificationService {
         '${subscription.serviceName} 구독이 ${subscription.nextBillingDate.day}일 만료됩니다.',
         tz.TZDateTime.from(subscription.nextBillingDate, location),
         notificationDetails,
-        androidAllowWhileIdle: true,
         uiLocalNotificationDateInterpretation:
             UILocalNotificationDateInterpretation.absoluteTime,
+        androidScheduleMode: AndroidScheduleMode.exactAllowWhileIdle,
       );
     } catch (e) {
       debugPrint('구독 알림 예약 중 오류 발생: $e');
@@ -416,9 +415,9 @@ class NotificationService {
             priority: Priority.high,
           ),
         ),
-        androidAllowWhileIdle: true,
         uiLocalNotificationDateInterpretation:
             UILocalNotificationDateInterpretation.absoluteTime,
+        androidScheduleMode: AndroidScheduleMode.exactAllowWhileIdle,
       );
     } catch (e) {
       debugPrint('결제 알림 예약 중 오류 발생: $e');
@@ -456,7 +455,7 @@ class NotificationService {
       }
 
       await _notifications.zonedSchedule(
-        (subscription.id + '_expiration').hashCode,
+        ('${subscription.id}_expiration').hashCode,
         '구독 만료 예정 알림',
         '${subscription.serviceName} 구독이 7일 후 만료됩니다.',
         tz.TZDateTime.from(reminderDate, location),
@@ -469,9 +468,9 @@ class NotificationService {
             priority: Priority.high,
           ),
         ),
-        androidAllowWhileIdle: true,
         uiLocalNotificationDateInterpretation:
             UILocalNotificationDateInterpretation.absoluteTime,
+        androidScheduleMode: AndroidScheduleMode.exactAllowWhileIdle,
       );
     } catch (e) {
       debugPrint('만료 알림 예약 중 오류 발생: $e');

lib/services/sms_scan/subscription_converter.dart

@@ -12,9 +12,12 @@ class SubscriptionConverter {
         final subscription = _convertSingle(model);
         result.add(subscription);
 
+        // 개발 편의를 위한 디버그 로그
+        // ignore: avoid_print
         print(
             '모델 변환 성공: ${model.serviceName}, 카테고리ID: ${model.categoryId}, URL: ${model.websiteUrl}, 통화: ${model.currency}');
       } catch (e) {
+        // ignore: avoid_print
         print('모델 변환 중 오류 발생: $e');
       }
     }

lib/services/sms_scan/subscription_filter.dart

@@ -1,11 +1,12 @@
 import '../../models/subscription.dart';
 import '../../models/subscription_model.dart';
+import '../../utils/logger.dart';
 
 class SubscriptionFilter {
   // 중복 구독 필터링 (서비스명과 금액이 같으면 중복으로 간주)
   List<Subscription> filterDuplicates(
       List<Subscription> scanned, List<SubscriptionModel> existing) {
-    print(
+    Log.d(
         '_filterDuplicates: 스캔된 구독 ${scanned.length}개, 기존 구독 ${existing.length}개');
 
     // 중복되지 않은 구독만 필터링
@@ -17,7 +18,7 @@ class SubscriptionFilter {
         final isSameCost = existingSub.monthlyCost == scannedSub.monthlyCost;
 
         if (isSameName && isSameCost) {
-          print(
+          Log.d(
               '중복 발견: ${scannedSub.serviceName} (${scannedSub.monthlyCost}원)');
           return true;
         }

lib/services/sms_scanner.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/foundation.dart' show kIsWeb;
 import 'package:flutter_sms_inbox/flutter_sms_inbox.dart';
 import '../models/subscription_model.dart';
+import '../utils/logger.dart';
 import '../temp/test_sms_data.dart';
 import '../services/subscription_url_matcher.dart';
 import '../utils/platform_helper.dart';
@@ -11,26 +12,26 @@ class SmsScanner {
   Future<List<SubscriptionModel>> scanForSubscriptions() async {
     try {
       List<dynamic> smsList;
-      print('SmsScanner: 스캔 시작');
+      Log.d('SmsScanner: 스캔 시작');
 
       // 플랫폼별 분기 처리
       if (kIsWeb) {
         // 웹 환경: 테스트 데이터 사용
-        print('SmsScanner: 웹 환경에서 테스트 데이터 사용');
+        Log.i('SmsScanner: 웹 환경에서 테스트 데이터 사용');
         smsList = TestSmsData.getTestData();
-        print('SmsScanner: 테스트 데이터 개수: ${smsList.length}');
+        Log.d('SmsScanner: 테스트 데이터 개수: ${smsList.length}');
       } else if (PlatformHelper.isIOS) {
         // iOS: SMS 접근 불가, 빈 리스트 반환
-        print('SmsScanner: iOS에서는 SMS 스캔 불가');
+        Log.w('SmsScanner: iOS에서는 SMS 스캔 불가');
         return [];
       } else if (PlatformHelper.isAndroid) {
         // Android: flutter_sms_inbox 사용
-        print('SmsScanner: Android에서 실제 SMS 스캔');
+        Log.i('SmsScanner: Android에서 실제 SMS 스캔');
         smsList = await _scanAndroidSms();
-        print('SmsScanner: 스캔된 SMS 개수: ${smsList.length}');
+        Log.d('SmsScanner: 스캔된 SMS 개수: ${smsList.length}');
       } else {
         // 기타 플랫폼
-        print('SmsScanner: 지원하지 않는 플랫폼');
+        Log.w('SmsScanner: 지원하지 않는 플랫폼');
         return [];
       }
 
@@ -47,32 +48,32 @@ class SmsScanner {
         serviceGroups[serviceName]!.add(sms);
       }
 
-      print('SmsScanner: 그룹화된 서비스 수: ${serviceGroups.length}');
+      Log.d('SmsScanner: 그룹화된 서비스 수: ${serviceGroups.length}');
 
       // 그룹화된 데이터로 구독 분석
       for (final entry in serviceGroups.entries) {
-        print('SmsScanner: 서비스 "${entry.key}" - 메시지 개수: ${entry.value.length}');
+        Log.d('SmsScanner: 서비스 "${entry.key}" - 메시지 개수: ${entry.value.length}');
 
         // 2회 이상 반복된 서비스만 구독으로 간주
         if (entry.value.length >= 2) {
           final serviceSms = entry.value[0]; // 가장 최근 SMS 사용
           final subscription = _parseSms(serviceSms, entry.value.length);
           if (subscription != null) {
-            print(
+            Log.i(
                 'SmsScanner: 구독 추가: ${subscription.serviceName}, 반복 횟수: ${subscription.repeatCount}');
             subscriptions.add(subscription);
           } else {
-            print('SmsScanner: 구독 파싱 실패: ${entry.key}');
+            Log.w('SmsScanner: 구독 파싱 실패: ${entry.key}');
           }
         } else {
-          print('SmsScanner: 반복 횟수 부족, 구독으로 간주하지 않음: ${entry.key}');
+          Log.d('SmsScanner: 반복 횟수 부족, 구독으로 간주하지 않음: ${entry.key}');
         }
       }
 
-      print('SmsScanner: 최종 구독 개수: ${subscriptions.length}');
+      Log.d('SmsScanner: 최종 구독 개수: ${subscriptions.length}');
       return subscriptions;
     } catch (e) {
-      print('SmsScanner: 예외 발생: $e');
+      Log.e('SmsScanner: 예외 발생', e);
       throw Exception('SMS 스캔 중 오류 발생: $e');
     }
   }
@@ -93,7 +94,7 @@ class SmsScanner {
 
       return smsList;
     } catch (e) {
-      print('SmsScanner: Android SMS 스캔 실패: $e');
+      Log.e('SmsScanner: Android SMS 스캔 실패', e);
       return [];
     }
   }
@@ -160,7 +161,7 @@ class SmsScanner {
         'previousPaymentDate': date.toIso8601String(),
       };
     } catch (e) {
-      print('SmsScanner: SMS 파싱 실패: $e');
+      Log.e('SmsScanner: SMS 파싱 실패', e);
       return null;
     }
   }
@@ -281,7 +282,7 @@ class SmsScanner {
         'Spotify Premium'
       ];
       if (dollarServices.any((service) => serviceName.contains(service))) {
-        print('서비스명 $serviceName으로 USD 통화 단위 확정');
+        Log.d('서비스명 $serviceName으로 USD 통화 단위 확정');
         currency = 'USD';
       }
 
@@ -411,7 +412,7 @@ class SmsScanner {
     // 서비스명 기반 통화 단위 확인
     for (final service in serviceCurrencyMap.keys) {
       if (message.contains(service)) {
-        print('_detectCurrency: ${service}는 USD 서비스로 판별됨');
+        Log.d('_detectCurrency: $service는 USD 서비스로 판별됨');
         return 'USD';
       }
     }
@@ -419,7 +420,7 @@ class SmsScanner {
     // 메시지에 달러 관련 키워드가 있는지 확인
     for (final keyword in dollarKeywords) {
       if (message.toLowerCase().contains(keyword.toLowerCase())) {
-        print('_detectCurrency: USD 키워드 발견: $keyword');
+        Log.d('_detectCurrency: USD 키워드 발견: $keyword');
         return 'USD';
       }
     }

lib/services/url_matcher/data/service_data_repository.dart

@@ -1,5 +1,6 @@
 import 'dart:convert';
 import 'package:flutter/services.dart';
+import '../../../utils/logger.dart';
 
 /// 서비스 데이터를 관리하는 저장소 클래스
 class ServiceDataRepository {
@@ -15,9 +16,9 @@ class ServiceDataRepository {
           await rootBundle.loadString('assets/data/subscription_services.json');
       _servicesData = json.decode(jsonString);
       _isInitialized = true;
-      print('ServiceDataRepository: JSON 데이터 로드 완료');
+      Log.i('ServiceDataRepository: JSON 데이터 로드 완료');
     } catch (e) {
-      print('ServiceDataRepository: JSON 로드 실패 - $e');
+      Log.w('ServiceDataRepository: JSON 로드 실패 - $e');
       // 로드 실패시 기존 하드코딩 데이터 사용
       _isInitialized = true;
     }

lib/services/url_matcher/services/category_mapper_service.dart

@@ -75,24 +75,33 @@ class CategoryMapperService {
   String getCategoryForLegacyService(String serviceName) {
     final lowerName = serviceName.toLowerCase();
 
-    if (LegacyServiceData.ottServices.containsKey(lowerName))
+    if (LegacyServiceData.ottServices.containsKey(lowerName)) {
       return 'ott_services';
-    if (LegacyServiceData.musicServices.containsKey(lowerName))
+    }
+    if (LegacyServiceData.musicServices.containsKey(lowerName)) {
       return 'music_streaming';
-    if (LegacyServiceData.storageServices.containsKey(lowerName))
+    }
+    if (LegacyServiceData.storageServices.containsKey(lowerName)) {
       return 'cloud_storage';
-    if (LegacyServiceData.aiServices.containsKey(lowerName))
+    }
+    if (LegacyServiceData.aiServices.containsKey(lowerName)) {
       return 'ai_services';
-    if (LegacyServiceData.programmingServices.containsKey(lowerName))
+    }
+    if (LegacyServiceData.programmingServices.containsKey(lowerName)) {
       return 'dev_tools';
-    if (LegacyServiceData.officeTools.containsKey(lowerName))
+    }
+    if (LegacyServiceData.officeTools.containsKey(lowerName)) {
       return 'office_tools';
-    if (LegacyServiceData.lifestyleServices.containsKey(lowerName))
+    }
+    if (LegacyServiceData.lifestyleServices.containsKey(lowerName)) {
       return 'lifestyle';
-    if (LegacyServiceData.shoppingServices.containsKey(lowerName))
+    }
+    if (LegacyServiceData.shoppingServices.containsKey(lowerName)) {
       return 'shopping';
-    if (LegacyServiceData.telecomServices.containsKey(lowerName))
+    }
+    if (LegacyServiceData.telecomServices.containsKey(lowerName)) {
       return 'telecom';
+    }
 
     return 'other';
   }

lib/services/url_matcher/services/url_matcher_service.dart

@@ -2,6 +2,7 @@ import '../models/service_info.dart';
 import '../data/service_data_repository.dart';
 import '../data/legacy_service_data.dart';
 import 'category_mapper_service.dart';
+import '../../../utils/logger.dart';
 
 /// URL 매칭 관련 기능을 제공하는 서비스 클래스
 class UrlMatcherService {
@@ -35,7 +36,7 @@ class UrlMatcherService {
 
       return null;
     } catch (e) {
-      print('UrlMatcherService: 도메인 추출 실패 - $e');
+      Log.e('UrlMatcherService: 도메인 추출 실패', e);
       return null;
     }
   }
@@ -107,7 +108,7 @@ class UrlMatcherService {
   /// 서비스명으로 URL 찾기
   String? suggestUrl(String serviceName) {
     if (serviceName.isEmpty) {
-      print('UrlMatcherService: 빈 serviceName');
+      Log.w('UrlMatcherService: 빈 serviceName');
       return null;
     }
 
@@ -118,7 +119,7 @@ class UrlMatcherService {
       // 정확한 매칭을 먼저 시도
       for (final entry in LegacyServiceData.allServices.entries) {
         if (lowerName.contains(entry.key.toLowerCase())) {
-          print('UrlMatcherService: 정확한 매칭 - $lowerName -> ${entry.key}');
+          Log.d('UrlMatcherService: 정확한 매칭 - $lowerName -> ${entry.key}');
           return entry.value;
         }
       }
@@ -126,7 +127,7 @@ class UrlMatcherService {
       // OTT 서비스 검사
       for (final entry in LegacyServiceData.ottServices.entries) {
         if (lowerName.contains(entry.key.toLowerCase())) {
-          print('UrlMatcherService: OTT 서비스 매칭 - $lowerName -> ${entry.key}');
+          Log.d('UrlMatcherService: OTT 서비스 매칭 - $lowerName -> ${entry.key}');
           return entry.value;
         }
       }
@@ -134,7 +135,7 @@ class UrlMatcherService {
       // 음악 서비스 검사
       for (final entry in LegacyServiceData.musicServices.entries) {
         if (lowerName.contains(entry.key.toLowerCase())) {
-          print('UrlMatcherService: 음악 서비스 매칭 - $lowerName -> ${entry.key}');
+          Log.d('UrlMatcherService: 음악 서비스 매칭 - $lowerName -> ${entry.key}');
           return entry.value;
         }
       }
@@ -142,7 +143,7 @@ class UrlMatcherService {
       // AI 서비스 검사
       for (final entry in LegacyServiceData.aiServices.entries) {
         if (lowerName.contains(entry.key.toLowerCase())) {
-          print('UrlMatcherService: AI 서비스 매칭 - $lowerName -> ${entry.key}');
+          Log.d('UrlMatcherService: AI 서비스 매칭 - $lowerName -> ${entry.key}');
           return entry.value;
         }
       }
@@ -150,7 +151,7 @@ class UrlMatcherService {
       // 프로그래밍 서비스 검사
       for (final entry in LegacyServiceData.programmingServices.entries) {
         if (lowerName.contains(entry.key.toLowerCase())) {
-          print('UrlMatcherService: 프로그래밍 서비스 매칭 - $lowerName -> ${entry.key}');
+          Log.d('UrlMatcherService: 프로그래밍 서비스 매칭 - $lowerName -> ${entry.key}');
           return entry.value;
         }
       }
@@ -158,7 +159,7 @@ class UrlMatcherService {
       // 오피스 툴 검사
       for (final entry in LegacyServiceData.officeTools.entries) {
         if (lowerName.contains(entry.key.toLowerCase())) {
-          print('UrlMatcherService: 오피스 툴 매칭 - $lowerName -> ${entry.key}');
+          Log.d('UrlMatcherService: 오피스 툴 매칭 - $lowerName -> ${entry.key}');
           return entry.value;
         }
       }
@@ -166,7 +167,7 @@ class UrlMatcherService {
       // 기타 서비스 검사
       for (final entry in LegacyServiceData.otherServices.entries) {
         if (lowerName.contains(entry.key.toLowerCase())) {
-          print('UrlMatcherService: 기타 서비스 매칭 - $lowerName -> ${entry.key}');
+          Log.d('UrlMatcherService: 기타 서비스 매칭 - $lowerName -> ${entry.key}');
           return entry.value;
         }
       }
@@ -175,15 +176,15 @@ class UrlMatcherService {
       for (final entry in LegacyServiceData.allServices.entries) {
         final key = entry.key.toLowerCase();
         if (key.contains(lowerName) || lowerName.contains(key)) {
-          print('UrlMatcherService: 부분 매칭 - $lowerName -> ${entry.key}');
+          Log.d('UrlMatcherService: 부분 매칭 - $lowerName -> ${entry.key}');
           return entry.value;
         }
       }
 
-      print('UrlMatcherService: 매칭 실패 - $lowerName');
+      Log.d('UrlMatcherService: 매칭 실패 - $lowerName');
       return null;
     } catch (e) {
-      print('UrlMatcherService: suggestUrl 에러 - $e');
+      Log.e('UrlMatcherService: suggestUrl 에러', e);
       return null;
     }
   }

lib/temp/test_sms_data.dart

@@ -210,6 +210,7 @@ class TestSmsData {
       }
     }
 
+    // ignore: avoid_print
     print('TestSmsData: 생성된 테스트 메시지 수: ${resultData.length}개');
     return resultData;
   }
@@ -233,7 +234,7 @@ class TestSmsData {
     ];
 
     // Microsoft 365는 연간 구독이므로 월별 비용으로 환산 (1년에 1번만 결제)
-    final microsoftMonthlyCost = 12800.0 / 12;
+    const microsoftMonthlyCost = 12800.0 / 12;
 
     // 최근 6개월 데이터 생성
     for (int i = 0; i < 6; i++) {

lib/theme/adaptive_theme.dart

@@ -19,8 +19,7 @@ class AdaptiveTheme {
         secondary: AppColors.secondaryColor,
         tertiary: AppColors.infoColor,
         error: AppColors.dangerColor,
-        background: const Color(0xFF121212),
-        surface: const Color(0xFF1E1E1E),
+        surface: Color(0xFF1E1E1E),
       ),
       scaffoldBackgroundColor: const Color(0xFF121212),
       cardTheme: CardThemeData(
@@ -175,7 +174,6 @@ class AdaptiveTheme {
     return darkTheme.copyWith(
       scaffoldBackgroundColor: Colors.black,
       colorScheme: darkTheme.colorScheme.copyWith(
-        background: Colors.black,
         surface: const Color(0xFF0A0A0A),
       ),
       cardTheme: darkTheme.cardTheme.copyWith(
@@ -200,7 +198,6 @@ class AdaptiveTheme {
         secondary: Colors.black87,
         tertiary: Colors.black54,
         error: Colors.red,
-        background: Colors.white,
         surface: Colors.white,
       ),
       textTheme: const TextTheme(

lib/theme/app_theme.dart

@@ -10,7 +10,6 @@ class AppTheme {
       secondary: AppColors.secondaryColor,
       tertiary: AppColors.infoColor,
       error: AppColors.dangerColor,
-      background: AppColors.backgroundColor,
       surface: AppColors.surfaceColor,
     ),
 
@@ -36,13 +35,13 @@ class AppTheme {
       foregroundColor: AppColors.textPrimary,
       elevation: 0,
       centerTitle: false,
-      titleTextStyle: const TextStyle(
+      titleTextStyle: TextStyle(
         color: AppColors.textPrimary,
         fontSize: 22,
         fontWeight: FontWeight.w600,
         letterSpacing: -0.2,
       ),
-      iconTheme: const IconThemeData(
+      iconTheme: IconThemeData(
         color: AppColors.primaryColor,
         size: 24,
       ),
@@ -51,21 +50,21 @@ class AppTheme {
     // 타이포그래피 - Metronic Tailwind 스타일
     textTheme: const TextTheme(
       // 헤드라인 - 페이지 제목
-      headlineLarge: const TextStyle(
+      headlineLarge: TextStyle(
         color: AppColors.darkNavy, // color.md 가이드: 메인 텍스트
         fontSize: 32,
         fontWeight: FontWeight.w700,
         letterSpacing: -0.5,
         height: 1.2,
       ),
-      headlineMedium: const TextStyle(
+      headlineMedium: TextStyle(
         color: AppColors.darkNavy, // color.md 가이드: 메인 텍스트
         fontSize: 28,
         fontWeight: FontWeight.w700,
         letterSpacing: -0.5,
         height: 1.2,
       ),
-      headlineSmall: const TextStyle(
+      headlineSmall: TextStyle(
         color: AppColors.darkNavy, // color.md 가이드: 메인 텍스트
         fontSize: 24,
         fontWeight: FontWeight.w600,
@@ -74,7 +73,7 @@ class AppTheme {
       ),
 
       // 타이틀 - 카드, 섹션 제목
-      titleLarge: const TextStyle(
+      titleLarge: TextStyle(
         color: AppColors.darkNavy, // color.md 가이드: 메인 텍스트
         fontSize: 20,
         fontWeight: FontWeight.w600,
@@ -257,14 +256,14 @@ class AppTheme {
 
     // 스위치 스타일
     switchTheme: SwitchThemeData(
-      thumbColor: MaterialStateProperty.resolveWith<Color>((states) {
-        if (states.contains(MaterialState.selected)) {
+      thumbColor: WidgetStateProperty.resolveWith<Color>((states) {
+        if (states.contains(WidgetState.selected)) {
           return AppColors.primaryColor;
         }
         return Colors.white;
       }),
-      trackColor: MaterialStateProperty.resolveWith<Color>((states) {
-        if (states.contains(MaterialState.selected)) {
+      trackColor: WidgetStateProperty.resolveWith<Color>((states) {
+        if (states.contains(WidgetState.selected)) {
           return AppColors.secondaryColor.withValues(alpha: 0.5);
         }
         return AppColors.borderColor;
@@ -273,8 +272,8 @@ class AppTheme {
 
     // 체크박스 스타일
     checkboxTheme: CheckboxThemeData(
-      fillColor: MaterialStateProperty.resolveWith<Color>((states) {
-        if (states.contains(MaterialState.selected)) {
+      fillColor: WidgetStateProperty.resolveWith<Color>((states) {
+        if (states.contains(WidgetState.selected)) {
           return AppColors.primaryColor;
         }
         return Colors.transparent;
@@ -287,8 +286,8 @@ class AppTheme {
 
     // 라디오 버튼 스타일
     radioTheme: RadioThemeData(
-      fillColor: MaterialStateProperty.resolveWith<Color>((states) {
-        if (states.contains(MaterialState.selected)) {
+      fillColor: WidgetStateProperty.resolveWith<Color>((states) {
+        if (states.contains(WidgetState.selected)) {
           return AppColors.primaryColor;
         }
         return AppColors.textSecondary;
@@ -311,12 +310,12 @@ class AppTheme {
       labelColor: AppColors.primaryColor,
       unselectedLabelColor: AppColors.textSecondary,
       indicatorColor: AppColors.primaryColor,
-      labelStyle: const TextStyle(
+      labelStyle: TextStyle(
         fontSize: 14,
         fontWeight: FontWeight.w600,
         letterSpacing: 0.1,
       ),
-      unselectedLabelStyle: const TextStyle(
+      unselectedLabelStyle: TextStyle(
         fontSize: 14,
         fontWeight: FontWeight.w500,
         letterSpacing: 0.1,

lib/utils/logger.dart

@@ -0,0 +1,27 @@
+import 'package:flutter/foundation.dart';
+
+/// 단순 로거 헬퍼
+/// - 디버그/프로파일 모드에서만 상세 로그 출력
+/// - 릴리스 모드에서는 중요한 경고/에러만 축약 출력
+class Log {
+  static bool get _verbose => !kReleaseMode;
+
+  static void d(String message) {
+    if (_verbose) debugPrint(message);
+  }
+
+  static void i(String message) {
+    if (_verbose) debugPrint('ℹ️ $message');
+  }
+
+  static void w(String message) {
+    // 경고는 릴리스에서도 간단히 남김
+    debugPrint('⚠️ $message');
+  }
+
+  static void e(String message, [Object? error, StackTrace? stack]) {
+    final suffix = error != null ? ' | $error' : '';
+    debugPrint('❌ $message$suffix');
+    if (_verbose && stack != null) debugPrint(stack.toString());
+  }
+}

lib/utils/memory_manager.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/foundation.dart';
+import 'logger.dart';
 import 'dart:async';
 
 /// 메모리 관리를 위한 헬퍼 클래스
@@ -57,7 +58,7 @@ class MemoryManager {
   void clearCache() {
     _cache.clear();
     if (kDebugMode) {
-      print('🧹 메모리 캐시가 비워졌습니다.');
+      Log.d('🧹 메모리 캐시가 비워졌습니다.');
     }
   }
 
@@ -122,7 +123,7 @@ class MemoryManager {
     PaintingBinding.instance.imageCache.clear();
     PaintingBinding.instance.imageCache.clearLiveImages();
     if (kDebugMode) {
-      print('🖼️ 이미지 캐시가 비워졌습니다.');
+      Log.d('🖼️ 이미지 캐시가 비워졌습니다.');
     }
   }
 
@@ -155,7 +156,7 @@ class MemoryManager {
     imageCache.maximumSizeBytes = maxImageCacheSize ~/ 2;
 
     if (kDebugMode) {
-      print('⚠️ 메모리 압박 대응: 캐시 크기 감소');
+      Log.w('메모리 압박 대응: 캐시 크기 감소');
     }
   }
 

lib/utils/performance_optimizer.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/foundation.dart';
+import 'logger.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/scheduler.dart';
 import 'dart:async';
@@ -141,12 +142,12 @@ class PerformanceOptimizer {
   /// 빌드 최적화를 위한 const 위젯 권장사항 체크
   static void checkConstOptimization() {
     if (kDebugMode) {
-      print('💡 성능 최적화 팁:');
-      print('1. 가능한 모든 위젯에 const 사용');
-      print('2. StatelessWidget 대신 const 생성자 사용');
-      print('3. 큰 리스트는 ListView.builder 사용');
-      print('4. 이미지는 캐싱과 함께 적절한 크기로 로드');
-      print('5. 애니메이션은 AnimatedBuilder 사용');
+      Log.i('💡 성능 최적화 팁:\n'
+          '1. 가능한 모든 위젯에 const 사용\n'
+          '2. StatelessWidget 대신 const 생성자 사용\n'
+          '3. 큰 리스트는 ListView.builder 사용\n'
+          '4. 이미지는 캐싱과 함께 적절한 크기로 로드\n'
+          '5. 애니메이션은 AnimatedBuilder 사용');
     }
   }
 
@@ -161,7 +162,7 @@ class PerformanceOptimizer {
 
     // 위젯이 비정상적으로 많이 생성되면 경고
     if ((_widgetCounts[widgetName] ?? 0) > 100) {
-      print('⚠️ 경고: $widgetName 위젯이 100개 이상 생성됨. 메모리 누수 가능성!');
+      Log.w('경고: $widgetName 위젯이 100개 이상 생성됨. 메모리 누수 가능성!');
     }
   }
 }
@@ -196,11 +197,11 @@ class PerformanceMeasure {
     try {
       final result = await operation();
       stopwatch.stop();
-      print('✅ $name 완료: ${stopwatch.elapsedMilliseconds}ms');
+      Log.d('✅ $name 완료: ${stopwatch.elapsedMilliseconds}ms');
       return result;
     } catch (e) {
       stopwatch.stop();
-      print('❌ $name 실패: ${stopwatch.elapsedMilliseconds}ms - $e');
+      Log.e('❌ $name 실패: ${stopwatch.elapsedMilliseconds}ms', e);
       rethrow;
     }
   }

lib/utils/subscription_category_helper.dart

@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 import '../models/subscription_model.dart';
 import '../providers/category_provider.dart';
-import '../services/subscription_url_matcher.dart';
 import '../services/url_matcher/data/legacy_service_data.dart';
 
 /// 구독 서비스를 카테고리별로 구분하는 도우미 클래스

lib/widgets/add_subscription/add_subscription_event_section.dart

@@ -3,7 +3,6 @@ import '../../controllers/add_subscription_controller.dart';
 import '../common/form_fields/currency_input_field.dart';
 import '../common/form_fields/date_picker_field.dart';
 import '../../theme/app_colors.dart';
-import '../../l10n/app_localizations.dart';
 
 /// 구독 추가 화면의 이벤트/할인 섹션
 class AddSubscriptionEventSection extends StatelessWidget {
@@ -47,11 +46,11 @@ class AddSubscriptionEventSection extends StatelessWidget {
               color: AppColors.glassBorder.withValues(alpha: 0.1),
               width: 1,
             ),
-            boxShadow: [
+            boxShadow: const [
               BoxShadow(
                 color: AppColors.shadowBlack,
                 blurRadius: 10,
-                offset: const Offset(0, 4),
+                offset: Offset(0, 4),
               ),
             ],
           ),
@@ -147,7 +146,7 @@ class AddSubscriptionEventSection extends StatelessWidget {
                         ),
                         child: Row(
                           children: [
-                            Icon(
+                            const Icon(
                               Icons.info_outline_rounded,
                               color: AppColors.infoColor,
                               size: 20,
@@ -175,7 +174,7 @@ class AddSubscriptionEventSection extends StatelessWidget {
                                   }
                                   return Text(
                                     infoText,
-                                    style: TextStyle(
+                                    style: const TextStyle(
                                       fontSize: 14,
                                       color: AppColors.darkNavy,
                                       fontWeight: FontWeight.w500,

lib/widgets/analysis/analysis_badge.dart

@@ -5,7 +5,6 @@ import '../../models/subscription_model.dart';
 import '../../services/currency_util.dart';
 import '../../providers/locale_provider.dart';
 import '../../theme/app_colors.dart';
-import '../../l10n/app_localizations.dart';
 
 /// 파이 차트에서 선택된 섹션에 표시되는 배지 위젯
 class AnalysisBadge extends StatelessWidget {
@@ -33,7 +32,7 @@ class AnalysisBadge extends StatelessWidget {
           color: borderColor,
           width: 2,
         ),
-        boxShadow: [
+        boxShadow: const [
           BoxShadow(
             color: AppColors.shadowBlack,
             blurRadius: 10,

lib/widgets/app_navigator.dart

@@ -6,6 +6,7 @@ import '../screens/app_lock_screen.dart';
 import '../models/subscription_model.dart';
 import '../providers/navigation_provider.dart';
 import '../routes/app_routes.dart';
+import '../utils/logger.dart';
 import 'animated_page_transitions.dart';
 import '../l10n/app_localizations.dart';
 
@@ -44,7 +45,7 @@ class AppNavigator {
   /// 구독 상세 화면으로 네비게이션
   static Future<void> toDetail(
       BuildContext context, SubscriptionModel subscription) async {
-    print('AppNavigator.toDetail 호출됨: ${subscription.serviceName}');
+    Log.d('AppNavigator.toDetail 호출됨: ${subscription.serviceName}');
     HapticFeedback.lightImpact();
 
     try {
@@ -52,9 +53,9 @@ class AppNavigator {
         AppRoutes.subscriptionDetail,
         arguments: subscription,
       );
-      print('DetailScreen 네비게이션 성공');
+      Log.d('DetailScreen 네비게이션 성공');
     } catch (e) {
-      print('DetailScreen 네비게이션 오류: $e');
+      Log.e('DetailScreen 네비게이션 오류', e);
     }
   }
 

lib/widgets/common/buttons/secondary_button.dart

@@ -42,7 +42,6 @@ class _SecondaryButtonState extends State<SecondaryButton> {
 
   @override
   Widget build(BuildContext context) {
-    final theme = Theme.of(context);
     final effectiveBorderColor = widget.borderColor ?? AppColors.secondaryColor;
     final effectiveTextColor = widget.textColor ?? AppColors.primaryColor;
 

lib/widgets/common/dialogs/loading_overlay.dart

@@ -81,8 +81,8 @@ class LoadingDialog {
       context: context,
       barrierDismissible: barrierDismissible,
       barrierColor: barrierColor ?? Colors.black54,
-      builder: (context) => WillPopScope(
-        onWillPop: () async => barrierDismissible,
+      builder: (context) => PopScope(
+        canPop: barrierDismissible,
         child: Center(
           child: Container(
             padding: const EdgeInsets.all(24),

lib/widgets/common/form_fields/base_text_field.dart

@@ -66,7 +66,7 @@ class BaseTextField extends StatelessWidget {
         if (label != null) ...[
           Text(
             label!,
-            style: TextStyle(
+            style: const TextStyle(
               fontSize: 16,
               fontWeight: FontWeight.w600,
               color: AppColors.textSecondary,
@@ -91,13 +91,13 @@ class BaseTextField extends StatelessWidget {
           readOnly: readOnly,
           cursorColor: cursorColor ?? theme.primaryColor,
           style: style ??
-              TextStyle(
+              const TextStyle(
                 fontSize: 16,
                 color: AppColors.textPrimary,
               ),
           decoration: InputDecoration(
             hintText: hintText,
-            hintStyle: TextStyle(
+            hintStyle: const TextStyle(
               color: AppColors.textMuted,
             ),
             prefixIcon: prefixIcon,

lib/widgets/common/form_fields/date_picker_field.dart

@@ -48,7 +48,7 @@ class DatePickerField extends StatelessWidget {
       children: [
         Text(
           label,
-          style: TextStyle(
+          style: const TextStyle(
             fontSize: 16,
             fontWeight: FontWeight.w600,
             color: AppColors.darkNavy,
@@ -249,7 +249,7 @@ class _DateRangeItem extends StatelessWidget {
           children: [
             Text(
               label,
-              style: TextStyle(
+              style: const TextStyle(
                 fontSize: 12,
                 color: AppColors.textSecondary,
               ),

lib/widgets/common/snackbar/app_snackbar.dart

@@ -200,7 +200,7 @@ class AppSnackBar {
               width: 24,
               height: 24,
               margin: const EdgeInsets.only(right: 12),
-              child: CircularProgressIndicator(
+              child: const CircularProgressIndicator(
                 strokeWidth: 2.5,
                 color: AppColors.pureWhite,
               ),

lib/widgets/detail/detail_event_section.dart

@@ -44,11 +44,11 @@ class DetailEventSection extends StatelessWidget {
                   color: AppColors.glassBorder.withValues(alpha: 0.1),
                   width: 1,
                 ),
-                boxShadow: [
+                boxShadow: const [
                   BoxShadow(
                     color: AppColors.shadowBlack,
                     blurRadius: 10,
-                    offset: const Offset(0, 4),
+                    offset: Offset(0, 4),
                   ),
                 ],
               ),
@@ -118,7 +118,7 @@ class DetailEventSection extends StatelessWidget {
                         ),
                         child: Row(
                           children: [
-                            Icon(
+                            const Icon(
                               Icons.info_outline_rounded,
                               color: AppColors.infoColor,
                               size: 20,
@@ -127,7 +127,7 @@ class DetailEventSection extends StatelessWidget {
                             Expanded(
                               child: Text(
                                 AppLocalizations.of(context).eventPriceHint,
-                                style: TextStyle(
+                                style: const TextStyle(
                                   fontSize: 14,
                                   color: AppColors.darkNavy,
                                   fontWeight: FontWeight.w500,
@@ -253,8 +253,8 @@ class _DiscountBadge extends StatelessWidget {
           const SizedBox(width: 12),
           Text(
             _getLocalizedDiscountAmount(context, currency, discountAmount),
-            style: TextStyle(
-              color: const Color(0xFF15803D),
+            style: const TextStyle(
+              color: Color(0xFF15803D),
               fontSize: 14,
               fontWeight: FontWeight.w500,
             ),

lib/widgets/detail/detail_form_section.dart

@@ -49,11 +49,11 @@ class DetailFormSection extends StatelessWidget {
                   color: AppColors.glassBorder.withValues(alpha: 0.1),
                   width: 1,
                 ),
-                boxShadow: [
+                boxShadow: const [
                   BoxShadow(
                     color: AppColors.shadowBlack,
                     blurRadius: 10,
-                    offset: const Offset(0, 4),
+                    offset: Offset(0, 4),
                   ),
                 ],
               ),

lib/widgets/detail/detail_header_section.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import 'package:intl/intl.dart';
 import '../../models/subscription_model.dart';
 import '../../controllers/detail_screen_controller.dart';
 import '../../providers/locale_provider.dart';

lib/widgets/detail/detail_url_section.dart

@@ -41,11 +41,11 @@ class DetailUrlSection extends StatelessWidget {
               color: AppColors.glassBorder.withValues(alpha: 0.1),
               width: 1,
             ),
-            boxShadow: [
+            boxShadow: const [
               BoxShadow(
                 color: AppColors.shadowBlack,
                 blurRadius: 10,
-                offset: const Offset(0, 4),
+                offset: Offset(0, 4),
               ),
             ],
           ),
@@ -89,7 +89,7 @@ class DetailUrlSection extends StatelessWidget {
                   label: AppLocalizations.of(context).websiteUrl,
                   hintText: AppLocalizations.of(context).urlExample,
                   keyboardType: TextInputType.url,
-                  prefixIcon: Icon(
+                  prefixIcon: const Icon(
                     Icons.link_rounded,
                     color: AppColors.navyGray,
                   ),
@@ -114,7 +114,7 @@ class DetailUrlSection extends StatelessWidget {
                       children: [
                         Row(
                           children: [
-                            Icon(
+                            const Icon(
                               Icons.info_outline_rounded,
                               color: AppColors.warningColor,
                               size: 20,
@@ -122,7 +122,7 @@ class DetailUrlSection extends StatelessWidget {
                             const SizedBox(width: 8),
                             Text(
                               AppLocalizations.of(context).cancelGuide,
-                              style: TextStyle(
+                              style: const TextStyle(
                                 fontSize: 16,
                                 fontWeight: FontWeight.w600,
                                 color: AppColors.darkNavy,
@@ -133,7 +133,7 @@ class DetailUrlSection extends StatelessWidget {
                         const SizedBox(height: 8),
                         Text(
                           AppLocalizations.of(context).cancelServiceGuide,
-                          style: TextStyle(
+                          style: const TextStyle(
                             fontSize: 14,
                             color: AppColors.darkNavy,
                             fontWeight: FontWeight.w500,
@@ -167,7 +167,7 @@ class DetailUrlSection extends StatelessWidget {
                     ),
                     child: Row(
                       children: [
-                        Icon(
+                        const Icon(
                           Icons.auto_fix_high_rounded,
                           color: AppColors.infoColor,
                           size: 20,
@@ -176,7 +176,7 @@ class DetailUrlSection extends StatelessWidget {
                         Expanded(
                           child: Text(
                             AppLocalizations.of(context).urlAutoMatchInfo,
-                            style: TextStyle(
+                            style: const TextStyle(
                               fontSize: 14,
                               color: AppColors.darkNavy,
                               fontWeight: FontWeight.w500,

lib/widgets/empty_state_widget.dart

@@ -111,7 +111,7 @@ class EmptyStateWidget extends StatelessWidget {
                     },
                     child: Text(
                       AppLocalizations.of(context).addSubscription,
-                      style: TextStyle(
+                      style: const TextStyle(
                         fontSize: 16,
                         fontWeight: FontWeight.w600,
                         letterSpacing: 0.5,

lib/widgets/glassmorphic_scaffold.dart

@@ -163,7 +163,7 @@ class _GlassmorphicScaffoldState extends State<GlassmorphicScaffold>
               begin: Alignment.topLeft,
               end: Alignment.bottomRight,
               colors: gradientColors
-                  .map((color) => color.withOpacity(0.3))
+                  .map((color) => color.withValues(alpha: 0.3))
                   .toList(),
             ),
           ),

lib/widgets/glassmorphism_card.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import '../utils/logger.dart';
 import 'dart:ui';
 import '../theme/app_colors.dart';
 import 'themed_text.dart';
@@ -74,12 +75,12 @@ class GlassmorphismCard extends StatelessWidget {
                       ),
                   boxShadow: boxShadow ??
                       [
-                        BoxShadow(
+                        const BoxShadow(
                           color: AppColors
                               .shadowBlack, // color.md 가이드: rgba(0,0,0,0.08)
                           blurRadius: 20,
                           spreadRadius: -5,
-                          offset: const Offset(0, 10),
+                          offset: Offset(0, 10),
                         ),
                       ],
                 ),
@@ -200,7 +201,7 @@ class _AnimatedGlassmorphismCardState extends State<AnimatedGlassmorphismCard>
         _handleTapUp(details);
         // onTap 콜백 실행
         if (widget.onTap != null) {
-          print('[AnimatedGlassmorphismCard] onTap 콜백 실행');
+          Log.d('[AnimatedGlassmorphismCard] onTap 콜백 실행');
           widget.onTap!();
         }
       },

lib/widgets/main_summary_card.dart

@@ -90,7 +90,7 @@ class MainScreenSummaryCard extends StatelessWidget {
                             Text(
                               AppLocalizations.of(context)
                                   .monthlyTotalSubscriptionCost,
-                              style: TextStyle(
+                              style: const TextStyle(
                                 color: AppColors
                                     .darkNavy, // color.md 가이드: 밝은 배경 위 어두운 텍스트
                                 fontSize: 15,
@@ -215,7 +215,7 @@ class MainScreenSummaryCard extends StatelessWidget {
                                   context,
                                   title: AppLocalizations.of(context)
                                       .estimatedAnnualCost,
-                                  value: '${NumberFormat.currency(
+                                  value: NumberFormat.currency(
                                     locale: defaultCurrency == 'KRW'
                                         ? 'ko_KR'
                                         : defaultCurrency == 'JPY'
@@ -225,7 +225,7 @@ class MainScreenSummaryCard extends StatelessWidget {
                                                 : 'en_US',
                                     symbol: currencySymbol,
                                     decimalDigits: decimals,
-                                  ).format(yearlyCost)}',
+                                  ).format(yearlyCost),
                                 ),
                                 const SizedBox(width: 16),
                                 _buildInfoBox(
@@ -282,7 +282,7 @@ class MainScreenSummaryCard extends StatelessWidget {
                                     Text(
                                       AppLocalizations.of(context)
                                           .eventDiscountActive,
-                                      style: TextStyle(
+                                      style: const TextStyle(
                                         color: AppColors
                                             .darkNavy, // color.md 가이드: 밝은 배경 위 어두운 텍스트
                                         fontSize: 11,
@@ -373,7 +373,7 @@ class MainScreenSummaryCard extends StatelessWidget {
           children: [
             Text(
               title,
-              style: TextStyle(
+              style: const TextStyle(
                 color: AppColors.navyGray, // color.md 가이드: 밝은 배경 위 서브 텍스트
                 fontSize: 12,
                 fontWeight: FontWeight.w500,

lib/widgets/sms_scan/scan_loading_widget.dart

@@ -14,7 +14,7 @@ class ScanLoadingWidget extends StatelessWidget {
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            CircularProgressIndicator(
+            const CircularProgressIndicator(
               valueColor: AlwaysStoppedAnimation<Color>(AppColors.primaryColor),
             ),
             const SizedBox(height: 16),

lib/widgets/subscription_card.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import 'package:intl/intl.dart';
 import 'package:provider/provider.dart';
 import '../models/subscription_model.dart';
 import '../providers/category_provider.dart';
@@ -202,8 +201,9 @@ class _SubscriptionCardState extends State<SubscriptionCard>
         daysUntilNext = 7; // 다음 주 같은 요일
       }
 
-      if (daysUntilNext == 0)
+      if (daysUntilNext == 0) {
         return AppLocalizations.of(context).paymentDueToday;
+      }
       return AppLocalizations.of(context).paymentDueInDays(daysUntilNext);
     }
 
@@ -303,8 +303,7 @@ class _SubscriptionCardState extends State<SubscriptionCard>
           width: double.infinity, // 전체 너비를 차지하도록 설정
           onTap: widget.onTap ??
               () async {
-                print(
-                    '[SubscriptionCard] AnimatedGlassmorphismCard onTap 호출됨 - ${widget.subscription.serviceName}');
+                // ignore: use_build_context_synchronously
                 await AppNavigator.toDetail(context, widget.subscription);
               },
           child: Column(

lib/widgets/subscription_list_widget.dart

@@ -12,6 +12,7 @@ import '../services/subscription_url_matcher.dart';
 import './dialogs/delete_confirmation_dialog.dart';
 import './common/snackbar/app_snackbar.dart';
 import '../l10n/app_localizations.dart';
+import '../utils/logger.dart';
 
 /// 카테고리별로 구독 목록을 표시하는 위젯
 class SubscriptionListWidget extends StatelessWidget {
@@ -100,7 +101,7 @@ class SubscriptionListWidget extends StatelessWidget {
                             child: SwipeableSubscriptionCard(
                               subscription: subscriptions[subIndex],
                               onTap: () {
-                                print(
+                                Log.d(
                                     '[SubscriptionListWidget] SwipeableSubscriptionCard onTap 호출됨');
                                 AppNavigator.toDetail(
                                     context, subscriptions[subIndex]);
@@ -122,13 +123,15 @@ class SubscriptionListWidget extends StatelessWidget {
                                 );
 
                                 // 삭제 확인 다이얼로그 표시
+                                if (!context.mounted) return;
                                 final shouldDelete =
                                     await DeleteConfirmationDialog.show(
                                   context: context,
                                   serviceName: displayName,
                                 );
+                                if (!context.mounted) return;
 
-                                if (shouldDelete && context.mounted) {
+                                if (shouldDelete) {
                                   // 사용자가 확인한 경우에만 삭제 진행
                                   final provider =
                                       Provider.of<SubscriptionProvider>(

lib/widgets/swipeable_subscription_card.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import 'package:flutter/gestures.dart';
 import '../models/subscription_model.dart';
 import '../utils/haptic_feedback_helper.dart';
 import 'subscription_card.dart';
@@ -29,7 +28,6 @@ class _SwipeableSubscriptionCardState extends State<SwipeableSubscriptionCard>
   static const double _tapTolerance = 20.0; // 탭 허용 범위
   static const double _actionThresholdPercent = 0.15;
   static const double _deleteThresholdPercent = 0.40;
-  static const int _tapDurationMs = 500;
   static const double _velocityThreshold = 800.0;
   // static const double _animationDuration = 300.0;
 
@@ -39,8 +37,7 @@ class _SwipeableSubscriptionCardState extends State<SwipeableSubscriptionCard>
 
   // 제스처 추적
   Offset? _startPosition;
-  DateTime? _startTime;
-  bool _isValidTap = true;
+  // 제스처 관련 보조 변수(간소화)
 
   // 상태 관리
   double _currentOffset = 0;
@@ -95,8 +92,6 @@ class _SwipeableSubscriptionCardState extends State<SwipeableSubscriptionCard>
   // 제스처 핸들러
   void _handlePanStart(DragStartDetails details) {
     _startPosition = details.localPosition;
-    _startTime = DateTime.now();
-    _isValidTap = true;
     _hapticTriggered = false;
     _controller.stop();
   }
@@ -104,12 +99,7 @@ class _SwipeableSubscriptionCardState extends State<SwipeableSubscriptionCard>
   void _handlePanUpdate(DragUpdateDetails details) {
     final currentPosition = details.localPosition;
     final delta = currentPosition.dx - _startPosition!.dx;
-    final distance = (currentPosition - _startPosition!).distance;
-
-    // 탭 유효성 검사 - 거리가 허용 범위를 벗어나면 스와이프로 간주
-    if (distance > _tapTolerance) {
-      _isValidTap = false;
-    }
+    // 탭/스와이프 판별 거리는 외부에서 사용하지 않아 제거
 
     // 카드 이동
     setState(() {
@@ -129,14 +119,7 @@ class _SwipeableSubscriptionCardState extends State<SwipeableSubscriptionCard>
   }
 
   // 헬퍼 메서드
-  void _processTap() {
-    print('[SwipeableSubscriptionCard] _processTap 호출됨');
-    if (widget.onTap != null) {
-      print('[SwipeableSubscriptionCard] onTap 콜백 실행');
-      widget.onTap!();
-    }
-    _animateToOffset(0);
-  }
+  // 탭 처리는 SubscriptionCard에서 수행
 
   void _processSwipe(double velocity) {
     final extent = _currentOffset.abs();

test/exchange_rate_service_test.dart

@@ -0,0 +1,12 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:submanager/services/exchange_rate_service.dart';
+
+void main() {
+  test('USD -> KRW conversion returns non-null using defaults when offline',
+      () async {
+    final service = ExchangeRateService();
+    final krw = await service.convertUsdToTarget(1.0, 'KRW');
+    expect(krw, isNotNull);
+    expect(krw, greaterThan(0));
+  });
+}

test/url_matcher_test.dart

@@ -0,0 +1,19 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:submanager/services/subscription_url_matcher.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  test('extractDomain parses host correctly', () async {
+    await SubscriptionUrlMatcher.initialize();
+    final domain =
+        SubscriptionUrlMatcher.extractDomain('https://www.netflix.com/kr');
+    expect(domain, 'netflix');
+  });
+
+  test('findMatchingUrl finds known service', () async {
+    await SubscriptionUrlMatcher.initialize();
+    final url = SubscriptionUrlMatcher.findMatchingUrl('넷플릭스');
+    expect(url, isNotNull);
+  });
+}