feat: 다국어 지원 및 다중 통화 환율 변환 기능 확대

- ExchangeRateService에 JPY, CNY 환율 지원 추가
- 구독 서비스별 다국어 표시 이름 지원
- 분석 화면 차트 및 UI/UX 개선
- 설정 화면 전면 리팩토링
- SMS 스캔 기능 사용성 개선
- 전체 앱 다국어 번역 확대

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

lib/widgets/analysis/total_expense_summary_card.dart

@@ -1,12 +1,15 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
+import 'package:provider/provider.dart';
 import '../../models/subscription_model.dart';
 import '../../services/currency_util.dart';
+import '../../providers/locale_provider.dart';
 import '../../utils/haptic_feedback_helper.dart';
 import '../../theme/app_colors.dart';
 import '../glassmorphism_card.dart';
 import '../themed_text.dart';
+import '../../l10n/app_localizations.dart';
 
 /// 총 지출 요약을 보여주는 카드 위젯
 class TotalExpenseSummaryCard extends StatelessWidget {
@@ -23,6 +26,7 @@ class TotalExpenseSummaryCard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final locale = context.watch<LocaleProvider>().locale.languageCode;
     return SliverToBoxAdapter(
       child: Padding(
         padding: const EdgeInsets.symmetric(horizontal: 16),
@@ -52,7 +56,7 @@ class TotalExpenseSummaryCard extends StatelessWidget {
                       mainAxisAlignment: MainAxisAlignment.spaceBetween,
                       children: [
                         ThemedText.headline(
-                          text: '총 지출 요약',
+                          text: AppLocalizations.of(context).totalExpenseSummary,
                           style: const TextStyle(
                             fontSize: 18,
                           ),
@@ -63,14 +67,14 @@ class TotalExpenseSummaryCard extends StatelessWidget {
                           padding: EdgeInsets.zero,
                           constraints: const BoxConstraints(),
                           onPressed: () async {
-                            final totalExpenseText = CurrencyUtil.formatTotalAmount(totalExpense);
+                            final totalExpenseText = CurrencyUtil.formatTotalAmountWithLocale(totalExpense, locale);
                             await Clipboard.setData(
                                 ClipboardData(text: totalExpenseText));
                             HapticFeedbackHelper.lightImpact();
                             if (!context.mounted) return;
                             ScaffoldMessenger.of(context).showSnackBar(
                               SnackBar(
-                                content: Text('총 지출액이 복사되었습니다: $totalExpenseText'),
+                                content: Text(AppLocalizations.of(context).totalExpenseCopied(totalExpenseText)),
                                 duration: const Duration(seconds: 2),
                                 behavior: SnackBarBehavior.floating,
                                 shape: RoundedRectangleBorder(
@@ -89,7 +93,7 @@ class TotalExpenseSummaryCard extends StatelessWidget {
                     ),
                     const SizedBox(height: 8),
                     ThemedText.subtitle(
-                      text: '월 단위 총액',
+                      text: AppLocalizations.of(context).monthlyTotalAmount,
                       style: const TextStyle(
                         fontSize: 14,
                       ),
@@ -103,7 +107,7 @@ class TotalExpenseSummaryCard extends StatelessWidget {
                             crossAxisAlignment: CrossAxisAlignment.start,
                             children: [
                               ThemedText.caption(
-                                text: '총 지출',
+                                text: AppLocalizations.of(context).totalExpense,
                                 style: const TextStyle(
                                   fontSize: 12,
                                   fontWeight: FontWeight.bold,
@@ -111,7 +115,7 @@ class TotalExpenseSummaryCard extends StatelessWidget {
                               ),
                               const SizedBox(height: 4),
                               ThemedText(
-                                CurrencyUtil.formatTotalAmount(totalExpense),
+                                CurrencyUtil.formatTotalAmountWithLocale(totalExpense, locale),
                                 style: const TextStyle(
                                   fontSize: 26,
                                   fontWeight: FontWeight.bold,
@@ -148,7 +152,7 @@ class TotalExpenseSummaryCard extends StatelessWidget {
                                         CrossAxisAlignment.start,
                                     children: [
                                       ThemedText.caption(
-                                        text: '총 서비스',
+                                        text: AppLocalizations.of(context).totalServices,
                                         style: const TextStyle(
                                           fontSize: 12,
                                           fontWeight: FontWeight.bold,
@@ -156,7 +160,7 @@ class TotalExpenseSummaryCard extends StatelessWidget {
                                       ),
                                       const SizedBox(height: 2),
                                       ThemedText(
-                                        '${subscriptions.length}개',
+                                        AppLocalizations.of(context).subscriptionCount(subscriptions.length),
                                         style: const TextStyle(
                                           fontSize: 18,
                                           fontWeight: FontWeight.bold,
@@ -190,7 +194,7 @@ class TotalExpenseSummaryCard extends StatelessWidget {
                                         CrossAxisAlignment.start,
                                     children: [
                                       ThemedText.caption(
-                                        text: '평균 요금',
+                                        text: AppLocalizations.of(context).averageCost,
                                         style: const TextStyle(
                                           fontSize: 12,
                                           fontWeight: FontWeight.bold,
@@ -198,10 +202,11 @@ class TotalExpenseSummaryCard extends StatelessWidget {
                                       ),
                                       const SizedBox(height: 2),
                                       ThemedText(
-                                        CurrencyUtil.formatTotalAmount(
+                                        CurrencyUtil.formatTotalAmountWithLocale(
                                             subscriptions.isEmpty
                                                 ? 0
-                                                : totalExpense / subscriptions.length),
+                                                : totalExpense / subscriptions.length,
+                                            locale),
                                         style: const TextStyle(
                                           fontSize: 18,
                                           fontWeight: FontWeight.bold,