smtp実装と寿命実装

android/app/src/main/AndroidManifest.xml

@@ -28,6 +28,10 @@
             <action android:name="android.intent.action.PROCESS_TEXT" />
             <data android:mimeType="text/plain" />
         </intent>
+        <intent>
+            <action android:name="android.intent.action.SEND" />
+            <data android:mimeType="*/*" />
+        </intent>
     </queries>
 
     <application

ios/Runner/GeneratedPluginRegistrant.m

@@ -12,6 +12,12 @@
 @import flutter_contacts;
 #endif
 
+#if __has_include(<flutter_email_sender/FlutterEmailSenderPlugin.h>)
+#import <flutter_email_sender/FlutterEmailSenderPlugin.h>
+#else
+@import flutter_email_sender;
+#endif
+
 #if __has_include(<geolocator_apple/GeolocatorPlugin.h>)
 #import <geolocator_apple/GeolocatorPlugin.h>
 #else
@@ -82,6 +88,7 @@
 
 + (void)registerWithRegistry:(NSObject<FlutterPluginRegistry>*)registry {
   [FlutterContactsPlugin registerWithRegistrar:[registry registrarForPlugin:@"FlutterContactsPlugin"]];
+  [FlutterEmailSenderPlugin registerWithRegistrar:[registry registrarForPlugin:@"FlutterEmailSenderPlugin"]];
   [GeolocatorPlugin registerWithRegistrar:[registry registrarForPlugin:@"GeolocatorPlugin"]];
   [FLTImagePickerPlugin registerWithRegistrar:[registry registrarForPlugin:@"FLTImagePickerPlugin"]];
   [MobileScannerPlugin registerWithRegistrar:[registry registrarForPlugin:@"MobileScannerPlugin"]];

lib/config/app_config.dart

@@ -0,0 +1,35 @@
+/// アプリ全体のバージョンと機能フラグを集中管理する設定クラス。
+/// - バージョンや機能フラグは --dart-define で上書き可能。
+/// - プレイストア公開やベータ配信時の切り替えを容易にする。
+class AppConfig {
+  /// アプリのバージョン（ビルド時に --dart-define=APP_VERSION=... で上書き可能）。
+  static const String version = String.fromEnvironment('APP_VERSION', defaultValue: '1.0.0');
+
+  /// 機能フラグ（ビルド時に --dart-define で上書き可能）。
+  static const bool enableBillingDocs = bool.fromEnvironment('ENABLE_BILLING_DOCS', defaultValue: true);
+  static const bool enableSalesManagement = bool.fromEnvironment('ENABLE_SALES_MANAGEMENT', defaultValue: false);
+
+  /// APIエンドポイント（必要に応じて dart-define で注入）。
+  static const String apiEndpoint = String.fromEnvironment('API_ENDPOINT', defaultValue: '');
+
+  /// 機能フラグの一覧（UIなどで表示する用途向け）。
+  static Map<String, bool> get features => {
+        'enableBillingDocs': enableBillingDocs,
+        'enableSalesManagement': enableSalesManagement,
+      };
+
+  /// 機能キーで有効/無効を判定するヘルパー。
+  static bool isFeatureEnabled(String key) => features[key] ?? false;
+
+  /// 有効なダッシュボードルート一覧（動的に増える場合はここで管理）。
+  static Set<String> get enabledRoutes {
+    final routes = <String>{'settings'};
+    if (enableBillingDocs) {
+      routes.addAll({'invoice_history', 'invoice_input', 'master_hub', 'customer_master', 'product_master'});
+    }
+    if (enableSalesManagement) {
+      routes.add('sales_management');
+    }
+    return routes;
+  }
+}

lib/constants/company_profile_keys.dart

@@ -0,0 +1,22 @@
+const String kCompanyNameKey = 'company_name';
+const String kCompanyZipKey = 'company_zip';
+const String kCompanyAddressKey = 'company_addr';
+const String kCompanyTelKey = 'company_tel';
+const String kCompanyFaxKey = 'company_fax';
+const String kCompanyEmailKey = 'company_email';
+const String kCompanyUrlKey = 'company_url';
+const String kCompanyRegKey = 'company_reg';
+
+const String kStaffNameKey = 'staff_name';
+const String kStaffEmailKey = 'staff_mail';
+const String kStaffMobileKey = 'staff_mobile';
+
+const String kCompanyBankAccountsKey = 'company_bank_accounts';
+const String kCompanyTaxRateKey = 'company_tax_rate';
+const String kCompanyTaxDisplayModeKey = 'company_tax_display_mode';
+const String kCompanySealPathKey = 'company_seal_path';
+
+const int kCompanyBankSlotCount = 4;
+const int kCompanyBankActiveLimit = 2;
+
+const List<String> kAccountTypeOptions = ['普通', '当座', '貯蓄'];

lib/constants/mail_send_method.dart

@@ -0,0 +1,10 @@
+const String kMailSendMethodPrefKey = 'mail_send_method';
+const String kMailSendMethodSmtp = 'smtp';
+const String kMailSendMethodDeviceMailer = 'device_mailer';
+
+String normalizeMailSendMethod(String? value) {
+  if (value == kMailSendMethodDeviceMailer) {
+    return kMailSendMethodDeviceMailer;
+  }
+  return kMailSendMethodSmtp;
+}

lib/constants/mail_templates.dart

@@ -0,0 +1,32 @@
+const String kMailPlaceholderFilename = '{{FILENAME}}';
+const String kMailPlaceholderHash = '{{HASH}}';
+const String kMailPlaceholderCompanyName = '{{COMPANY_NAME}}';
+const String kMailPlaceholderCompanyEmail = '{{COMPANY_EMAIL}}';
+const String kMailPlaceholderCompanyTel = '{{COMPANY_TEL}}';
+const String kMailPlaceholderCompanyAddress = '{{COMPANY_ADDRESS}}';
+const String kMailPlaceholderCompanyReg = '{{COMPANY_REG}}';
+const String kMailPlaceholderStaffName = '{{STAFF_NAME}}';
+const String kMailPlaceholderStaffEmail = '{{STAFF_EMAIL}}';
+const String kMailPlaceholderStaffMobile = '{{STAFF_MOBILE}}';
+const String kMailPlaceholderBankAccounts = '{{BANK_ACCOUNTS}}';
+const String kMailPlaceholderAccountsList = '{{ACCOUNTS}}';
+
+const String kMailTemplateIdDefault = 'default';
+const String kMailTemplateIdNone = 'none';
+
+const String kMailHeaderTemplateKey = 'mail_header_template';
+const String kMailFooterTemplateKey = 'mail_footer_template';
+const String kMailHeaderTextKey = 'mail_header_text';
+const String kMailFooterTextKey = 'mail_footer_text';
+
+const String kMailHeaderTemplateDefault = '【請求書送付のお知らせ】\nファイル名: $kMailPlaceholderFilename\nHASH: $kMailPlaceholderHash';
+const String kMailFooterTemplateDefault =
+    '---\n$kMailPlaceholderCompanyName\n$kMailPlaceholderCompanyAddress\nTEL: $kMailPlaceholderCompanyTel / MAIL: $kMailPlaceholderCompanyEmail\n担当: $kMailPlaceholderStaffName ($kMailPlaceholderStaffMobile) $kMailPlaceholderStaffEmail\n$kMailPlaceholderBankAccounts\n登録番号: $kMailPlaceholderCompanyReg\nファイル名: $kMailPlaceholderFilename\nHASH: $kMailPlaceholderHash';
+
+String applyMailTemplate(String template, Map<String, String> values) {
+  var result = template;
+  values.forEach((placeholder, value) {
+    result = result.replaceAll(placeholder, value);
+  });
+  return result;
+}

lib/main.dart

@@ -1,85 +1,295 @@
 // lib/main.dart
 // version: 1.5.02 (Update: Date selection & Tax fix)
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 
 // --- 独自モジュールのインポート ---
 import 'models/invoice_models.dart'; // Invoice, InvoiceItem モデル
 import 'screens/invoice_input_screen.dart'; // 入力フォーム画面
 import 'screens/invoice_detail_page.dart'; // 詳細表示・編集画面
 import 'screens/invoice_history_screen.dart'; // 履歴画面
+import 'screens/dashboard_screen.dart'; // ダッシュボード
 import 'services/location_service.dart'; // 位置情報サービス
 import 'services/customer_repository.dart'; // 顧客リポジトリ
+import 'services/app_settings_repository.dart';
+import 'services/theme_controller.dart';
+import 'utils/build_expiry_info.dart';
 
-void main() {
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  await AppThemeController.instance.load();
+  final expiryInfo = BuildExpiryInfo.fromEnvironment();
+  if (expiryInfo.isExpired) {
+    runApp(ExpiredApp(expiryInfo: expiryInfo));
+    return;
+  }
   runApp(const MyApp());
 }
 
-class MyApp extends StatelessWidget {
+class MyApp extends StatefulWidget {
   const MyApp({super.key});
 
+  @override
+  State<MyApp> createState() => _MyAppState();
+}
+
+class _MyAppState extends State<MyApp> {
+  final TransformationController _zoomController = TransformationController();
+  int _activePointers = 0;
+
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
+    return ValueListenableBuilder<ThemeMode>(
-      title: '販売アシスト1号',
+      valueListenable: AppThemeController.instance.notifier,
-      theme: ThemeData(
+      builder: (context, mode, _) => MaterialApp(
-        colorScheme: ColorScheme.fromSeed(seedColor: Colors.indigo.shade700).copyWith(
+        title: '販売アシスト1号',
-          primary: Colors.indigo.shade700,
+        navigatorObservers: [
-          secondary: Colors.deepOrange.shade400,
+          _ZoomResetObserver(_zoomController),
-          surface: Colors.grey.shade50,
+        ],
-          onSurface: Colors.blueGrey.shade900,
+        theme: ThemeData(
-        ),
+          colorScheme: ColorScheme.fromSeed(seedColor: Colors.indigo.shade700).copyWith(
-        scaffoldBackgroundColor: Colors.grey.shade50,
+            primary: Colors.indigo.shade700,
-        appBarTheme: AppBarTheme(
+            secondary: Colors.deepOrange.shade400,
-          backgroundColor: Colors.indigo.shade700,
+            surface: Colors.grey.shade100,
-          foregroundColor: Colors.white,
+            onSurface: Colors.blueGrey.shade900,
-          elevation: 0,
-        ),
-        elevatedButtonTheme: ElevatedButtonThemeData(
-          style: ElevatedButton.styleFrom(
-            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
-            padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
-            textStyle: const TextStyle(fontWeight: FontWeight.bold),
           ),
-        ),
+          scaffoldBackgroundColor: Colors.grey.shade100,
-        outlinedButtonTheme: OutlinedButtonThemeData(
+          appBarTheme: AppBarTheme(
-          style: OutlinedButton.styleFrom(
+            backgroundColor: Colors.indigo.shade700,
-            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+            foregroundColor: Colors.white,
-            side: BorderSide(color: Colors.indigo.shade700),
+            elevation: 0,
-            padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
-            textStyle: const TextStyle(fontWeight: FontWeight.bold),
           ),
-        ),
+          elevatedButtonTheme: ElevatedButtonThemeData(
-        inputDecorationTheme: InputDecorationTheme(
+            style: ElevatedButton.styleFrom(
-          border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
+              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
-          focusedBorder: OutlineInputBorder(
+              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
-            borderRadius: BorderRadius.circular(12),
+              textStyle: const TextStyle(fontWeight: FontWeight.bold),
-            borderSide: BorderSide(color: Colors.indigo.shade700, width: 1.4),
-          ),
-        ),
-        visualDensity: VisualDensity.adaptivePlatformDensity,
-        useMaterial3: true,
-        fontFamily: 'IPAexGothic',
-      ),
-      builder: (context, child) {
-        final mq = MediaQuery.of(context);
-        return GestureDetector(
-          behavior: HitTestBehavior.translucent,
-          onTap: () => FocusScope.of(context).unfocus(),
-          child: AnimatedPadding(
-            duration: const Duration(milliseconds: 200),
-            curve: Curves.easeOut,
-            padding: EdgeInsets.only(bottom: mq.viewInsets.bottom),
-            child: InteractiveViewer(
-              panEnabled: false,
-              scaleEnabled: true,
-              minScale: 0.8,
-              maxScale: 4.0,
-              child: child ?? const SizedBox.shrink(),
             ),
           ),
-        );
+          outlinedButtonTheme: OutlinedButtonThemeData(
+            style: OutlinedButton.styleFrom(
+              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+              side: BorderSide(color: Colors.indigo.shade700),
+              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
+              textStyle: const TextStyle(fontWeight: FontWeight.bold),
+            ),
+          ),
+          inputDecorationTheme: InputDecorationTheme(
+            border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
+            focusedBorder: OutlineInputBorder(
+              borderRadius: BorderRadius.circular(12),
+              borderSide: BorderSide(color: Colors.indigo.shade700, width: 1.4),
+            ),
+          ),
+          visualDensity: VisualDensity.adaptivePlatformDensity,
+          useMaterial3: true,
+          fontFamily: 'IPAexGothic',
+        ),
+        darkTheme: ThemeData(
+          brightness: Brightness.dark,
+          colorScheme: ColorScheme(
+            brightness: Brightness.dark,
+            primary: const Color(0xFF66D9EF),
+            onPrimary: const Color(0xFF1E1F1C),
+            secondary: const Color(0xFFF92672),
+            onSecondary: const Color(0xFF1E1F1C),
+            surface: const Color(0xFF272822),
+            onSurface: const Color(0xFFF8F8F2),
+            error: Colors.red.shade300,
+            onError: const Color(0xFF1E1F1C),
+          ),
+          scaffoldBackgroundColor: const Color(0xFF272822),
+          appBarTheme: const AppBarTheme(
+            backgroundColor: Color(0xFF32332A),
+            foregroundColor: Color(0xFFF8F8F2),
+            elevation: 0,
+          ),
+          elevatedButtonTheme: ElevatedButtonThemeData(
+            style: ElevatedButton.styleFrom(
+              backgroundColor: const Color(0xFF66D9EF),
+              foregroundColor: const Color(0xFF1E1F1C),
+              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
+              textStyle: const TextStyle(fontWeight: FontWeight.bold),
+            ),
+          ),
+          outlinedButtonTheme: OutlinedButtonThemeData(
+            style: OutlinedButton.styleFrom(
+              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+              side: const BorderSide(color: Color(0xFF66D9EF)),
+              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
+              textStyle: const TextStyle(fontWeight: FontWeight.bold),
+            ),
+          ),
+          inputDecorationTheme: const InputDecorationTheme(
+            filled: true,
+            fillColor: Color(0xFF32332A),
+            border: OutlineInputBorder(borderRadius: BorderRadius.all(Radius.circular(12))),
+            focusedBorder: OutlineInputBorder(
+              borderRadius: BorderRadius.all(Radius.circular(12)),
+              borderSide: BorderSide(color: Color(0xFF66D9EF), width: 1.4),
+            ),
+          ),
+          snackBarTheme: const SnackBarThemeData(
+            backgroundColor: Color(0xFF32332A),
+            contentTextStyle: TextStyle(color: Color(0xFFF8F8F2)),
+          ),
+          visualDensity: VisualDensity.adaptivePlatformDensity,
+          useMaterial3: true,
+          fontFamily: 'IPAexGothic',
+        ),
+        themeMode: mode,
+        builder: (context, child) {
+          final mq = MediaQuery.of(context);
+          return Listener(
+            onPointerDown: (_) => setState(() => _activePointers++),
+            onPointerUp: (_) => setState(() => _activePointers = (_activePointers - 1).clamp(0, 10)),
+            onPointerCancel: (_) => setState(() => _activePointers = (_activePointers - 1).clamp(0, 10)),
+            child: GestureDetector(
+              behavior: HitTestBehavior.translucent,
+              onTap: () => FocusScope.of(context).unfocus(),
+              child: AnimatedPadding(
+                duration: const Duration(milliseconds: 200),
+                curve: Curves.easeOut,
+                padding: EdgeInsets.only(bottom: mq.viewInsets.bottom),
+                child: InteractiveViewer(
+                  panEnabled: false,
+                  scaleEnabled: true,
+                  minScale: 0.8,
+                  maxScale: 4.0,
+                  transformationController: _zoomController,
+                  child: IgnorePointer(
+                    ignoring: _activePointers > 1,
+                    child: child ?? const SizedBox.shrink(),
+                  ),
+                ),
+              ),
+            ),
+          );
+        },
+        home: const _HomeDecider(),
+      ),
+    );
+  }
+}
+
+class ExpiredApp extends StatelessWidget {
+  final BuildExpiryInfo expiryInfo;
+  const ExpiredApp({super.key, required this.expiryInfo});
+
+  String _format(DateTime? timestamp) {
+    if (timestamp == null) return '不明';
+    final local = timestamp.toLocal();
+    String two(int v) => v.toString().padLeft(2, '0');
+    return '${local.year}/${two(local.month)}/${two(local.day)} ${two(local.hour)}:${two(local.minute)}';
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final buildText = _format(expiryInfo.buildTimestamp);
+    final expiryText = _format(expiryInfo.expiryTimestamp);
+    return MaterialApp(
+      debugShowCheckedModeBanner: false,
+      home: Scaffold(
+        backgroundColor: Colors.black,
+        body: Center(
+          child: Padding(
+            padding: const EdgeInsets.all(32),
+            child: Column(
+              mainAxisSize: MainAxisSize.min,
+              crossAxisAlignment: CrossAxisAlignment.center,
+              children: [
+                const Icon(Icons.lock_clock, size: 72, color: Colors.white),
+                const SizedBox(height: 24),
+                const Text(
+                  'このビルドは有効期限を過ぎています',
+                  style: TextStyle(color: Colors.white, fontSize: 20, fontWeight: FontWeight.bold),
+                  textAlign: TextAlign.center,
+                ),
+                const SizedBox(height: 16),
+                Text('ビルド日時: $buildText', style: const TextStyle(color: Colors.white70)),
+                const SizedBox(height: 4),
+                Text('有効期限: $expiryText', style: const TextStyle(color: Colors.white70)),
+                const SizedBox(height: 24),
+                const Text(
+                  '最新版を取得してインストールしてください。',
+                  style: TextStyle(color: Colors.white70),
+                  textAlign: TextAlign.center,
+                ),
+                const SizedBox(height: 24),
+                ElevatedButton.icon(
+                  style: ElevatedButton.styleFrom(backgroundColor: Colors.white, foregroundColor: Colors.black87),
+                  onPressed: () => SystemNavigator.pop(),
+                  icon: const Icon(Icons.exit_to_app),
+                  label: const Text('アプリを終了する'),
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class _ZoomResetObserver extends NavigatorObserver {
+  final TransformationController controller;
+  _ZoomResetObserver(this.controller);
+
+  void _reset() {
+    controller.value = Matrix4.identity();
+  }
+
+  @override
+  void didPush(Route route, Route? previousRoute) {
+    super.didPush(route, previousRoute);
+    _reset();
+  }
+
+  @override
+  void didPop(Route route, Route? previousRoute) {
+    super.didPop(route, previousRoute);
+    _reset();
+  }
+
+  @override
+  void didReplace({Route? newRoute, Route? oldRoute}) {
+    super.didReplace(newRoute: newRoute, oldRoute: oldRoute);
+    _reset();
+  }
+}
+
+class _HomeDecider extends StatefulWidget {
+  const _HomeDecider();
+
+  @override
+  State<_HomeDecider> createState() => _HomeDeciderState();
+}
+
+class _HomeDeciderState extends State<_HomeDecider> {
+  final _settings = AppSettingsRepository();
+  late Future<String> _homeFuture;
+
+  @override
+  void initState() {
+    super.initState();
+    _homeFuture = _settings.getHomeMode();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return FutureBuilder<String>(
+      future: _homeFuture,
+      builder: (context, snapshot) {
+        if (snapshot.connectionState != ConnectionState.done) {
+          return const Scaffold(body: Center(child: CircularProgressIndicator()));
+        }
+        final mode = snapshot.data ?? 'invoice_history';
+        if (mode == 'dashboard') {
+          return const DashboardScreen();
+        }
+        return const InvoiceHistoryScreen();
       },
-      home: const InvoiceHistoryScreen(),
     );
   }
 }

lib/models/customer_model.dart

@@ -13,6 +13,7 @@ class Customer {
   final bool isSynced;      // 同期フラグ
   final DateTime updatedAt; // 最終更新日時
   final bool isLocked;      // ロック
+  final bool isHidden;      // 非表示
   final String? headChar1;  // インデックス1
   final String? headChar2;  // インデックス2
 
@@ -30,6 +31,7 @@ class Customer {
     this.isSynced = false,
     DateTime? updatedAt,
     this.isLocked = false,
+    this.isHidden = false,
     this.headChar1,
     this.headChar2,
   }) : updatedAt = updatedAt ?? DateTime.now();
@@ -57,6 +59,7 @@ class Customer {
       'head_char2': headChar2,
       'is_locked': isLocked ? 1 : 0,
       'is_synced': isSynced ? 1 : 0,
+      'is_hidden': isHidden ? 1 : 0,
       'updated_at': updatedAt.toIso8601String(),
     };
   }
@@ -75,6 +78,7 @@ class Customer {
       odooId: map['odoo_id'],
       isLocked: (map['is_locked'] ?? 0) == 1,
       isSynced: map['is_synced'] == 1,
+      isHidden: (map['is_hidden'] ?? 0) == 1,
       updatedAt: DateTime.parse(map['updated_at']),
       headChar1: map['head_char1'],
       headChar2: map['head_char2'],
@@ -93,6 +97,7 @@ class Customer {
     bool? isSynced,
     DateTime? updatedAt,
     bool? isLocked,
+    bool? isHidden,
     String? email,
     int? contactVersionId,
     String? headChar1,
@@ -112,6 +117,7 @@ class Customer {
       isSynced: isSynced ?? this.isSynced,
       updatedAt: updatedAt ?? this.updatedAt,
       isLocked: isLocked ?? this.isLocked,
+      isHidden: isHidden ?? this.isHidden,
       headChar1: headChar1 ?? this.headChar1,
       headChar2: headChar2 ?? this.headChar2,
     );

lib/models/invoice_models.dart

@@ -66,6 +66,10 @@ enum DocumentType {
 }
 
 class Invoice {
+  static const String lockStatement =
+      '正式発行ボタン押下時にこの伝票はロックされ、以後の編集・削除はできません。ロック状態はハッシュチェーンで保護されます。';
+  static const String hashDescription =
+      'metaJson = JSON.stringify({id, invoiceNumber, customer, date, total, documentType, hash, lockStatement, companySnapshot, companySealHash}); metaHash = SHA-256(metaJson).';
   final String id;
   final Customer customer;
   final DateTime date;
@@ -88,6 +92,10 @@ class Invoice {
   final String? contactEmailSnapshot;
   final String? contactTelSnapshot;
   final String? contactAddressSnapshot;
+  final String? companySnapshot; // 追加: 発行時会社情報スナップショット
+  final String? companySealHash; // 追加: 角印画像ハッシュ
+  final String? metaJson;
+  final String? metaHash;
 
   Invoice({
     String? id,
@@ -112,6 +120,10 @@ class Invoice {
     this.contactEmailSnapshot,
     this.contactTelSnapshot,
     this.contactAddressSnapshot,
+    this.companySnapshot,
+    this.companySealHash,
+    this.metaJson,
+    this.metaHash,
   })  : id = id ?? DateTime.now().millisecondsSinceEpoch.toString(),
         terminalId = terminalId ?? "T1", // デフォルト端末ID
         updatedAt = updatedAt ?? DateTime.now();
@@ -132,6 +144,13 @@ class Invoice {
     }
   }
 
+  static const Map<DocumentType, String> _docTypeShortLabel = {
+    DocumentType.estimation: '見積',
+    DocumentType.delivery: '納品',
+    DocumentType.invoice: '請求',
+    DocumentType.receipt: '領収',
+  };
+
   String get invoiceNumberPrefix {
     switch (documentType) {
       case DocumentType.estimation: return "EST";
@@ -143,13 +162,74 @@ class Invoice {
 
   String get invoiceNumber => "$invoiceNumberPrefix-$terminalId-${DateFormat('yyyyMMdd').format(date)}-${id.substring(id.length > 4 ? id.length - 4 : 0)}";
 
-  // 表示用の宛名（スナップショットがあれば優先）
+  // 表示用の宛名（スナップショットがあれば優先）。必ず敬称を付与。
-  String get customerNameForDisplay => customerFormalNameSnapshot ?? customer.formalName;
+  String get customerNameForDisplay {
+    final base = customerFormalNameSnapshot ?? customer.formalName;
+    final hasHonorific = RegExp(r'(様|御中|殿)$').hasMatch(base);
+    return hasHonorific ? base : '$base ${customer.title}';
+  }
 
   int get subtotal => items.fold(0, (sum, item) => sum + item.subtotal);
   int get tax => (subtotal * taxRate).floor();
   int get totalAmount => subtotal + tax;
 
+  String get _projectLabel {
+    if (subject != null && subject!.trim().isNotEmpty) {
+      return subject!.trim();
+    }
+    return '案件';
+  }
+
+  String get mailTitleCore {
+    final dateStr = DateFormat('yyyyMMdd').format(date);
+    final docLabel = _docTypeShortLabel[documentType] ?? documentTypeName.replaceAll('書', '');
+    final customerCompact = customerNameForDisplay.replaceAll(RegExp(r'\s+'), '');
+    final amountStr = NumberFormat('#,###').format(totalAmount);
+    final buffer = StringBuffer()
+      ..write(dateStr)
+      ..write('($docLabel)')
+      ..write(_projectLabel)
+      ..write('@')
+      ..write(customerCompact)
+      ..write('_')
+      ..write(amountStr)
+      ..write('円');
+    final raw = buffer.toString();
+    return _sanitizeForFile(raw);
+  }
+
+  String get mailAttachmentFileName => '$mailTitleCore.PDF';
+
+  String get mailBodyText => '請求書をお送りします。ご確認ください。';
+
+  static String _sanitizeForFile(String input) {
+    var sanitized = input.replaceAll(RegExp(r'[\\/:*?"<>|]'), '-');
+    sanitized = sanitized.replaceAll(RegExp(r'[\r\n]+'), '');
+    sanitized = sanitized.replaceAll('　', '');
+    sanitized = sanitized.replaceAll(' ', '');
+    return sanitized;
+  }
+
+  Map<String, dynamic> metaPayload() {
+    return {
+      'id': id,
+      'invoiceNumber': invoiceNumber,
+      'customer': customerNameForDisplay,
+      'date': date.toIso8601String(),
+      'total': totalAmount,
+      'documentType': documentType.name,
+      'hash': contentHash,
+      'lockStatement': lockStatement,
+      'hashDescription': hashDescription,
+      'companySnapshot': companySnapshot,
+      'companySealHash': companySealHash,
+    };
+  }
+
+  String get metaJsonValue => metaJson ?? jsonEncode(metaPayload());
+
+  String get metaHashValue => metaHash ?? sha256.convert(utf8.encode(metaJsonValue)).toString();
+
   Map<String, dynamic> toMap() {
     return {
       'id': id,
@@ -175,6 +255,10 @@ class Invoice {
       'contact_email_snapshot': contactEmailSnapshot,
       'contact_tel_snapshot': contactTelSnapshot,
       'contact_address_snapshot': contactAddressSnapshot,
+      'company_snapshot': companySnapshot,
+      'company_seal_hash': companySealHash,
+      'meta_json': metaJsonValue,
+      'meta_hash': metaHashValue,
     };
   }
 
@@ -201,6 +285,10 @@ class Invoice {
     String? contactEmailSnapshot,
     String? contactTelSnapshot,
     String? contactAddressSnapshot,
+    String? companySnapshot,
+    String? companySealHash,
+    String? metaJson,
+    String? metaHash,
   }) {
     return Invoice(
       id: id ?? this.id,
@@ -225,6 +313,10 @@ class Invoice {
       contactEmailSnapshot: contactEmailSnapshot ?? this.contactEmailSnapshot,
       contactTelSnapshot: contactTelSnapshot ?? this.contactTelSnapshot,
       contactAddressSnapshot: contactAddressSnapshot ?? this.contactAddressSnapshot,
+      companySnapshot: companySnapshot ?? this.companySnapshot,
+      companySealHash: companySealHash ?? this.companySealHash,
+      metaJson: metaJson ?? this.metaJson,
+      metaHash: metaHash ?? this.metaHash,
     );
   }
 

lib/models/product_model.dart

@@ -7,6 +7,7 @@ class Product {
   final int stockQuantity; // 追加
   final String? odooId;
   final bool isLocked; // ロック
+  final bool isHidden; // 非表示
 
   Product({
     required this.id,
@@ -17,6 +18,7 @@ class Product {
     this.stockQuantity = 0, // 追加
     this.odooId,
     this.isLocked = false,
+    this.isHidden = false,
   });
 
   Map<String, dynamic> toMap() {
@@ -29,6 +31,7 @@ class Product {
       'stock_quantity': stockQuantity, // 追加
       'is_locked': isLocked ? 1 : 0,
       'odoo_id': odooId,
+      'is_hidden': isHidden ? 1 : 0,
     };
   }
 
@@ -42,6 +45,7 @@ class Product {
       stockQuantity: map['stock_quantity'] ?? 0, // 追加
       isLocked: (map['is_locked'] ?? 0) == 1,
       odooId: map['odoo_id'],
+      isHidden: (map['is_hidden'] ?? 0) == 1,
     );
   }
 
@@ -50,15 +54,22 @@ class Product {
     String? name,
     int? defaultUnitPrice,
     String? barcode,
+    String? category,
+    int? stockQuantity,
     String? odooId,
     bool? isLocked,
+    bool? isHidden,
   }) {
     return Product(
       id: id ?? this.id,
       name: name ?? this.name,
       defaultUnitPrice: defaultUnitPrice ?? this.defaultUnitPrice,
+      barcode: barcode ?? this.barcode,
+      category: category ?? this.category,
+      stockQuantity: stockQuantity ?? this.stockQuantity,
       odooId: odooId ?? this.odooId,
       isLocked: isLocked ?? this.isLocked,
+      isHidden: isHidden ?? this.isHidden,
     );
   }
 }

lib/screens/business_profile_screen.dart

@@ -0,0 +1,471 @@
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_contacts/flutter_contacts.dart';
+import 'package:image_picker/image_picker.dart';
+
+import '../constants/company_profile_keys.dart';
+// NOTE: mail template placeholders may rely on fields edited here.
+import '../models/company_model.dart';
+import '../services/company_profile_service.dart';
+import '../services/company_repository.dart';
+import '../widgets/contact_picker_sheet.dart';
+import '../widgets/keyboard_inset_wrapper.dart';
+
+class BusinessProfileScreen extends StatefulWidget {
+  const BusinessProfileScreen({super.key});
+
+  @override
+  State<BusinessProfileScreen> createState() => _BusinessProfileScreenState();
+}
+
+class _BusinessProfileScreenState extends State<BusinessProfileScreen> {
+  final _service = CompanyProfileService();
+  final _companyRepo = CompanyRepository();
+  final _companyNameCtrl = TextEditingController();
+  final _companyZipCtrl = TextEditingController();
+  final _companyAddrCtrl = TextEditingController();
+  final _companyTelCtrl = TextEditingController();
+  final _companyFaxCtrl = TextEditingController();
+  final _companyEmailCtrl = TextEditingController();
+  final _companyUrlCtrl = TextEditingController();
+  final _companyRegCtrl = TextEditingController();
+  final _staffNameCtrl = TextEditingController();
+  final _staffEmailCtrl = TextEditingController();
+  final _staffMobileCtrl = TextEditingController();
+
+  final List<_BankControllers> _bankCtrls = List.generate(
+    kCompanyBankSlotCount,
+    (_) => _BankControllers(),
+  );
+
+  bool _loading = true;
+  double _taxRate = 0.10;
+  String _taxDisplayMode = 'normal';
+  String? _sealPath;
+  CompanyInfo? _legacyInfo;
+
+  @override
+  void initState() {
+    super.initState();
+    _load();
+  }
+
+  Future<void> _load() async {
+    final profile = await _service.loadProfile();
+    final legacyInfo = await _companyRepo.getCompanyInfo();
+    if (!mounted) return;
+    setState(() {
+      _companyNameCtrl.text = profile.companyName.isNotEmpty ? profile.companyName : legacyInfo.name;
+      _companyZipCtrl.text = profile.companyZip.isNotEmpty ? profile.companyZip : (legacyInfo.zipCode ?? '');
+      _companyAddrCtrl.text = profile.companyAddress.isNotEmpty ? profile.companyAddress : (legacyInfo.address ?? '');
+      _companyTelCtrl.text = profile.companyTel.isNotEmpty ? profile.companyTel : (legacyInfo.tel ?? '');
+      _companyFaxCtrl.text = profile.companyFax.isNotEmpty ? profile.companyFax : (legacyInfo.fax ?? '');
+      _companyEmailCtrl.text = profile.companyEmail.isNotEmpty ? profile.companyEmail : (legacyInfo.email ?? '');
+      _companyUrlCtrl.text = profile.companyUrl.isNotEmpty ? profile.companyUrl : (legacyInfo.url ?? '');
+      _companyRegCtrl.text = profile.companyReg.isNotEmpty ? profile.companyReg : (legacyInfo.registrationNumber ?? '');
+      _staffNameCtrl.text = profile.staffName;
+      _staffEmailCtrl.text = profile.staffEmail;
+      _staffMobileCtrl.text = profile.staffMobile;
+      for (var i = 0; i < _bankCtrls.length; i++) {
+        final ctrl = _bankCtrls[i];
+        if (i < profile.bankAccounts.length) {
+          final acc = profile.bankAccounts[i];
+          ctrl.bankName.text = acc.bankName;
+          ctrl.branchName.text = acc.branchName;
+          ctrl.accountType = acc.accountType;
+          ctrl.accountNumber.text = acc.accountNumber;
+          ctrl.holderName.text = acc.holderName;
+          ctrl.isActive = acc.isActive;
+        }
+      }
+      _taxRate = legacyInfo.defaultTaxRate;
+      _taxDisplayMode = legacyInfo.taxDisplayMode;
+      _sealPath = legacyInfo.sealPath;
+      _legacyInfo = legacyInfo;
+      _loading = false;
+    });
+  }
+
+  Future<void> _save() async {
+    final accounts = _bankCtrls
+        .map(
+          (c) => CompanyBankAccount(
+            bankName: c.bankName.text,
+            branchName: c.branchName.text,
+            accountType: c.accountType,
+            accountNumber: c.accountNumber.text,
+            holderName: c.holderName.text,
+            isActive: c.isActive,
+          ),
+        )
+        .toList();
+    final activeCount = accounts.where((a) => a.isActive && a.bankName.trim().isNotEmpty).length;
+    if (activeCount > kCompanyBankActiveLimit) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text('振込口座は最大$kCompanyBankActiveLimit件まで有効化できます')),
+      );
+      return;
+    }
+
+    final profile = CompanyProfile(
+      companyName: _companyNameCtrl.text.trim(),
+      companyZip: _companyZipCtrl.text.trim(),
+      companyAddress: _companyAddrCtrl.text.trim(),
+      companyTel: _companyTelCtrl.text.trim(),
+      companyFax: _companyFaxCtrl.text.trim(),
+      companyEmail: _companyEmailCtrl.text.trim(),
+      companyUrl: _companyUrlCtrl.text.trim(),
+      companyReg: _companyRegCtrl.text.trim(),
+      staffName: _staffNameCtrl.text.trim(),
+      staffEmail: _staffEmailCtrl.text.trim(),
+      staffMobile: _staffMobileCtrl.text.trim(),
+      bankAccounts: accounts,
+    );
+    await _service.saveProfile(profile);
+    await _companyRepo.saveCompanyInfo(
+      (_legacyInfo ?? CompanyInfo(name: _companyNameCtrl.text.trim().isEmpty ? '未設定' : _companyNameCtrl.text.trim())).copyWith(
+        name: _companyNameCtrl.text.trim(),
+        zipCode: _companyZipCtrl.text.trim(),
+        address: _companyAddrCtrl.text.trim(),
+        tel: _companyTelCtrl.text.trim(),
+        fax: _companyFaxCtrl.text.trim(),
+        email: _companyEmailCtrl.text.trim(),
+        url: _companyUrlCtrl.text.trim(),
+        registrationNumber: _companyRegCtrl.text.trim().isEmpty ? null : _companyRegCtrl.text.trim(),
+        defaultTaxRate: _taxRate,
+        taxDisplayMode: _taxDisplayMode,
+        sealPath: _sealPath,
+      ),
+    );
+    if (!mounted) return;
+    ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('自社情報を保存しました')));
+  }
+
+  Future<void> _pickSeal(ImageSource source) async {
+    final picker = ImagePicker();
+    final image = await picker.pickImage(source: source, imageQuality: 85);
+    if (image == null) return;
+    setState(() {
+      _sealPath = image.path;
+    });
+  }
+
+  Future<void> _pickContacts(bool forCompany) async {
+    final granted = await FlutterContacts.requestPermission(readonly: true);
+    if (!granted) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('連絡先へのアクセス権限が必要です')));
+      }
+      return;
+    }
+    final contacts = await FlutterContacts.getContacts(withProperties: true, withAccounts: true);
+    if (!mounted) return;
+    final selected = await showModalBottomSheet<Contact?>(
+      context: context,
+      isScrollControlled: true,
+      backgroundColor: Colors.transparent,
+      builder: (context) => ContactPickerSheet(contacts: contacts, title: forCompany ? '会社情報を電話帳から' : '担当者を電話帳から'),
+    );
+    if (selected == null) return;
+    if (forCompany) {
+      if (selected.organizations.isNotEmpty) {
+        _companyNameCtrl.text = selected.organizations.first.company;
+      } else {
+        _companyNameCtrl.text = selected.displayName;
+      }
+      if (selected.addresses.isNotEmpty) {
+        final addr = selected.addresses.first;
+        _companyAddrCtrl.text = [addr.postalCode, addr.state, addr.city, addr.street].where((e) => e.trim().isNotEmpty).join(' ');
+      }
+      if (selected.phones.isNotEmpty) {
+        _companyTelCtrl.text = selected.phones.first.number;
+      }
+      if (selected.emails.isNotEmpty) {
+        _companyEmailCtrl.text = selected.emails.first.address;
+      }
+    } else {
+      _staffNameCtrl.text = selected.displayName;
+      if (selected.phones.isNotEmpty) {
+        _staffMobileCtrl.text = selected.phones.first.number;
+      }
+      if (selected.emails.isNotEmpty) {
+        _staffEmailCtrl.text = selected.emails.first.address;
+      }
+    }
+  }
+
+  @override
+  void dispose() {
+    _companyNameCtrl.dispose();
+    _companyZipCtrl.dispose();
+    _companyAddrCtrl.dispose();
+    _companyTelCtrl.dispose();
+    _companyFaxCtrl.dispose();
+    _companyEmailCtrl.dispose();
+    _companyUrlCtrl.dispose();
+    _companyRegCtrl.dispose();
+    _staffNameCtrl.dispose();
+    _staffEmailCtrl.dispose();
+    _staffMobileCtrl.dispose();
+    for (final ctrl in _bankCtrls) {
+      ctrl.dispose();
+    }
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('F2:自社情報'),
+        backgroundColor: Colors.indigo,
+        actions: [
+          IconButton(onPressed: _save, icon: const Icon(Icons.save)),
+        ],
+      ),
+      body: _loading
+          ? const Center(child: CircularProgressIndicator())
+          : KeyboardInsetWrapper(
+              basePadding: const EdgeInsets.all(16),
+              extraBottom: 24,
+              child: ListView(
+                children: [
+                  _section('会社情報', _buildCompanySection()),
+                  _section('担当者情報', _buildStaffSection()),
+                  _section('消費税設定', _buildTaxSection()),
+                  _section('印影（角印）', _buildSealSection()),
+                  _section('振込先口座 (最大2件まで有効)', _buildBankSection()),
+                ],
+              ),
+            ),
+    );
+  }
+
+  Widget _section(String title, Widget child) {
+    return Card(
+      margin: const EdgeInsets.only(bottom: 16),
+      child: Padding(
+        padding: const EdgeInsets.all(16),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text(title, style: const TextStyle(fontSize: 16, fontWeight: FontWeight.bold)),
+            const SizedBox(height: 8),
+            child,
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildCompanySection() {
+    return Column(
+      children: [
+        TextField(controller: _companyNameCtrl, decoration: const InputDecoration(labelText: '自社名')),
+        const SizedBox(height: 8),
+        TextField(controller: _companyZipCtrl, decoration: const InputDecoration(labelText: '郵便番号')),
+        const SizedBox(height: 8),
+        TextField(controller: _companyAddrCtrl, decoration: const InputDecoration(labelText: '住所')),
+        const SizedBox(height: 8),
+        TextField(controller: _companyTelCtrl, decoration: const InputDecoration(labelText: '電話番号')),
+        const SizedBox(height: 8),
+        TextField(controller: _companyFaxCtrl, decoration: const InputDecoration(labelText: 'FAX番号')),
+        const SizedBox(height: 8),
+        TextField(controller: _companyEmailCtrl, decoration: const InputDecoration(labelText: '代表メールアドレス')),
+        const SizedBox(height: 8),
+        TextField(controller: _companyUrlCtrl, decoration: const InputDecoration(labelText: 'URL')),
+        const SizedBox(height: 8),
+        TextField(controller: _companyRegCtrl, decoration: const InputDecoration(labelText: '登録番号(T番号)')),
+        const SizedBox(height: 12),
+        Align(
+          alignment: Alignment.centerRight,
+          child: OutlinedButton.icon(
+            onPressed: () => _pickContacts(true),
+            icon: const Icon(Icons.import_contacts),
+            label: const Text('電話帳から取り込む'),
+          ),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildStaffSection() {
+    return Column(
+      children: [
+        TextField(controller: _staffNameCtrl, decoration: const InputDecoration(labelText: '担当者名')),
+        const SizedBox(height: 8),
+        TextField(controller: _staffEmailCtrl, decoration: const InputDecoration(labelText: '担当者メール')),
+        const SizedBox(height: 8),
+        TextField(controller: _staffMobileCtrl, decoration: const InputDecoration(labelText: '担当者携帯番号')),
+        const SizedBox(height: 12),
+        Align(
+          alignment: Alignment.centerRight,
+          child: OutlinedButton.icon(
+            onPressed: () => _pickContacts(false),
+            icon: const Icon(Icons.smartphone),
+            label: const Text('電話帳から取り込む'),
+          ),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildBankSection() {
+    return Column(
+      children: List.generate(_bankCtrls.length, (index) {
+        final ctrl = _bankCtrls[index];
+        return Card(
+          margin: const EdgeInsets.only(bottom: 12),
+          color: ctrl.isActive ? Colors.green.shade50 : null,
+          child: Padding(
+            padding: const EdgeInsets.all(12),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Row(
+                  children: [
+                    Text('口座 ${index + 1}', style: const TextStyle(fontWeight: FontWeight.bold)),
+                    const Spacer(),
+                    Switch(
+                      value: ctrl.isActive,
+                      onChanged: (v) {
+                        setState(() => ctrl.isActive = v);
+                      },
+                    ),
+                  ],
+                ),
+                TextField(controller: ctrl.bankName, decoration: const InputDecoration(labelText: '銀行名')),
+                const SizedBox(height: 8),
+                TextField(controller: ctrl.branchName, decoration: const InputDecoration(labelText: '支店名')),
+                const SizedBox(height: 8),
+                DropdownButtonFormField<String>(
+                  initialValue: ctrl.accountType,
+                  decoration: const InputDecoration(labelText: '種別'),
+                  items: kAccountTypeOptions.map((e) => DropdownMenuItem(value: e, child: Text(e))).toList(),
+                  onChanged: (v) => setState(() => ctrl.accountType = v ?? '普通'),
+                ),
+                const SizedBox(height: 8),
+                TextField(controller: ctrl.accountNumber, decoration: const InputDecoration(labelText: '口座番号')),
+                const SizedBox(height: 8),
+                TextField(controller: ctrl.holderName, decoration: const InputDecoration(labelText: '名義人')),
+              ],
+            ),
+          ),
+        );
+      }),
+    );
+  }
+
+  Widget _buildTaxSection() {
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        const Text('デフォルト消費税率', style: TextStyle(fontWeight: FontWeight.bold)),
+        const SizedBox(height: 8),
+        Wrap(
+          spacing: 8,
+          children: [
+            ChoiceChip(
+              label: const Text('10%'),
+              selected: _taxRate == 0.10,
+              onSelected: (_) => setState(() => _taxRate = 0.10),
+            ),
+            ChoiceChip(
+              label: const Text('8%'),
+              selected: _taxRate == 0.08,
+              onSelected: (_) => setState(() => _taxRate = 0.08),
+            ),
+            ChoiceChip(
+              label: const Text('0%'),
+              selected: _taxRate == 0.0,
+              onSelected: (_) => setState(() => _taxRate = 0.0),
+            ),
+          ],
+        ),
+        const SizedBox(height: 16),
+        const Text('消費税の表示設定 (T番号未取得時など)', style: TextStyle(fontWeight: FontWeight.bold)),
+        const SizedBox(height: 8),
+        Wrap(
+          spacing: 8,
+          children: [
+            ChoiceChip(
+              label: const Text('通常表示'),
+              selected: _taxDisplayMode == 'normal',
+              onSelected: (_) => setState(() => _taxDisplayMode = 'normal'),
+            ),
+            ChoiceChip(
+              label: const Text('表示しない'),
+              selected: _taxDisplayMode == 'hidden',
+              onSelected: (_) => setState(() => _taxDisplayMode = 'hidden'),
+            ),
+            ChoiceChip(
+              label: const Text('「税別」と表示'),
+              selected: _taxDisplayMode == 'text_only',
+              onSelected: (_) => setState(() => _taxDisplayMode = 'text_only'),
+            ),
+          ],
+        ),
+      ],
+    );
+  }
+
+  Widget _buildSealSection() {
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Container(
+          height: 180,
+          width: double.infinity,
+          decoration: BoxDecoration(
+            border: Border.all(color: Colors.grey.shade400),
+            borderRadius: BorderRadius.circular(12),
+            color: Colors.grey.shade50,
+          ),
+          child: _sealPath == null
+              ? const Center(child: Icon(Icons.crop_original, size: 48, color: Colors.grey))
+              : ClipRRect(
+                  borderRadius: BorderRadius.circular(10),
+                  child: Image.file(File(_sealPath!), fit: BoxFit.contain),
+                ),
+        ),
+        const SizedBox(height: 12),
+        Wrap(
+          spacing: 12,
+          runSpacing: 8,
+          children: [
+            OutlinedButton.icon(
+              onPressed: () => _pickSeal(ImageSource.camera),
+              icon: const Icon(Icons.camera_alt),
+              label: const Text('カメラで取り込む'),
+            ),
+            OutlinedButton.icon(
+              onPressed: () => _pickSeal(ImageSource.gallery),
+              icon: const Icon(Icons.photo_library),
+              label: const Text('アルバムから選択'),
+            ),
+          ],
+        ),
+        const SizedBox(height: 6),
+        const Text('白い紙に押した判子を真上から撮影してください', style: TextStyle(fontSize: 12, color: Colors.grey)),
+      ],
+    );
+  }
+}
+
+class _BankControllers {
+  final bankName = TextEditingController();
+  final branchName = TextEditingController();
+  final accountNumber = TextEditingController();
+  final holderName = TextEditingController();
+  String accountType = '普通';
+  bool isActive = false;
+
+  void dispose() {
+    bankName.dispose();
+    branchName.dispose();
+    accountNumber.dispose();
+    holderName.dispose();
+  }
+}
+

lib/screens/company_info_screen.dart

@@ -71,6 +71,7 @@ class _CompanyInfoScreenState extends State<CompanyInfoScreen> {
     if (_isLoading) return const Scaffold(body: Center(child: CircularProgressIndicator()));
 
     return Scaffold(
+      resizeToAvoidBottomInset: false,
       appBar: AppBar(
         title: const Text("F1:自社情報"),
         backgroundColor: Colors.indigo,

lib/screens/customer_master_screen.dart

@@ -6,11 +6,13 @@ import 'package:shared_preferences/shared_preferences.dart';
 import 'dart:convert';
 import '../models/customer_model.dart';
 import '../services/customer_repository.dart';
+import '../widgets/contact_picker_sheet.dart';
 
 class CustomerMasterScreen extends StatefulWidget {
   final bool selectionMode;
+  final bool showHidden;
 
-  const CustomerMasterScreen({super.key, this.selectionMode = false});
+  const CustomerMasterScreen({super.key, this.selectionMode = false, this.showHidden = false});
 
   @override
   State<CustomerMasterScreen> createState() => _CustomerMasterScreenState();
@@ -87,6 +89,12 @@ class _CustomerMasterScreenState extends State<CustomerMasterScreen> {
   }
 
   Future<void> _showContactUpdateDialog(Customer customer) async {
+    if (customer.isLocked) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('ロック中の顧客は連絡先を更新できません')));
+      }
+      return;
+    }
     final emailController = TextEditingController(text: customer.email ?? "");
     final telController = TextEditingController(text: customer.tel ?? "");
     final addressController = TextEditingController(text: customer.address ?? "");
@@ -130,7 +138,7 @@ class _CustomerMasterScreenState extends State<CustomerMasterScreen> {
   Future<void> _loadCustomers() async {
     setState(() => _isLoading = true);
     try {
-      final customers = await _customerRepo.getAllCustomers();
+      final customers = await _customerRepo.getAllCustomers(includeHidden: widget.showHidden);
       if (!mounted) return;
       setState(() {
         _customers = customers;
@@ -149,13 +157,20 @@ class _CustomerMasterScreenState extends State<CustomerMasterScreen> {
     List<Customer> list = _customers.where((c) {
       return c.displayName.toLowerCase().contains(query) || c.formalName.toLowerCase().contains(query);
     }).toList();
+    if (!widget.showHidden) {
+      list = list.where((c) => !c.isHidden).toList();
+    }
     // Kana filtering disabled temporarily for stability
     switch (_sortKey) {
       case 'name_desc':
-        list.sort((a, b) => _normalizedName(b.displayName).compareTo(_normalizedName(a.displayName)));
+        list.sort((a, b) => widget.showHidden
+            ? b.id.compareTo(a.id)
+            : _normalizedName(b.displayName).compareTo(_normalizedName(a.displayName)));
         break;
       default:
-        list.sort((a, b) => _normalizedName(a.displayName).compareTo(_normalizedName(b.displayName)));
+        list.sort((a, b) => widget.showHidden
+            ? b.id.compareTo(a.id)
+            : _normalizedName(a.displayName).compareTo(_normalizedName(b.displayName)));
     }
     _filtered = list;
   }
@@ -205,16 +220,6 @@ class _CustomerMasterScreenState extends State<CustomerMasterScreen> {
 
   late final Map<String, String> _defaultKanaMap = _buildDefaultKanaMap();
 
-  String _normalizeIndexChar(String input) {
-    var s = input.replaceAll(RegExp(r"\s+|\u3000"), "");
-    if (s.isEmpty) return '';
-    String ch = s.characters.first;
-    final code = ch.codeUnitAt(0);
-    if (code >= 0x30A1 && code <= 0x30F6) {
-      ch = String.fromCharCode(code - 0x60); // katakana -> hiragana
-    }
-    return ch;
-  }
 
   Future<void> _addOrEditCustomer({Customer? customer}) async {
     final isEdit = customer != null;
@@ -244,26 +249,8 @@ class _CustomerMasterScreenState extends State<CustomerMasterScreen> {
       final Contact? picked = await showModalBottomSheet<Contact>(
         context: context,
         isScrollControlled: true,
-        builder: (ctx) => SafeArea(
+        backgroundColor: Colors.transparent,
-          child: SizedBox(
+        builder: (ctx) => ContactPickerSheet(contacts: contacts, title: isEdit ? '電話帳から上書き' : '電話帳から新規入力'),
-            height: MediaQuery.of(ctx).size.height * 0.6,
-            child: ListView.builder(
-              itemCount: contacts.length,
-              itemBuilder: (_, i) {
-                final c = contacts[i];
-                final orgCompany = c.organizations.isNotEmpty ? c.organizations.first.company : '';
-                final personParts = [c.name.last, c.name.first].where((v) => v.isNotEmpty).toList();
-                final person = personParts.isNotEmpty ? personParts.join(' ').trim() : c.displayName;
-                final label = orgCompany.isNotEmpty ? orgCompany : person;
-                return ListTile(
-                  title: Text(label),
-                  subtitle: person.isNotEmpty ? Text(person) : null,
-                  onTap: () => Navigator.pop(ctx, c),
-                );
-              },
-            ),
-          ),
-        ),
       );
       if (!mounted) return;
       if (picked != null) {
@@ -404,22 +391,25 @@ class _CustomerMasterScreenState extends State<CustomerMasterScreen> {
                 TextButton(
                   onPressed: () {
                     if (displayNameController.text.isEmpty || formalNameController.text.isEmpty) {
+                      ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text("表示名と正式名称は必須です")));
                       return;
                     }
-                    final head1 = _normalizeIndexChar(head1Controller.text);
+                    final head1 = head1Controller.text.trim();
-                    final head2 = _normalizeIndexChar(head2Controller.text);
+                    final head2 = head2Controller.text.trim();
+                    final locked = customer?.isLocked ?? false;
+                    final newId = locked ? const Uuid().v4() : (customer?.id ?? const Uuid().v4());
                     final newCustomer = Customer(
-                      id: customer?.id ?? const Uuid().v4(),
+                      id: newId,
-                      displayName: displayNameController.text,
+                      displayName: displayNameController.text.trim(),
-                      formalName: formalNameController.text,
+                      formalName: formalNameController.text.trim(),
                       title: selectedTitle,
-                      department: departmentController.text.isEmpty ? null : departmentController.text,
+                      department: departmentController.text.trim().isEmpty ? null : departmentController.text.trim(),
-                      address: addressController.text.isEmpty ? null : addressController.text,
+                      address: addressController.text.trim().isEmpty ? null : addressController.text.trim(),
-                      tel: telController.text.isEmpty ? null : telController.text,
+                      tel: telController.text.trim().isEmpty ? null : telController.text.trim(),
-                      email: emailController.text.isEmpty ? null : emailController.text,
+                      email: emailController.text.trim().isEmpty ? null : emailController.text.trim(),
-                      headChar1: head1.isEmpty ? _headKana(displayNameController.text) : head1,
+                      headChar1: head1.isEmpty ? null : head1,
                       headChar2: head2.isEmpty ? null : head2,
-                      isLocked: customer?.isLocked ?? false,
+                      isLocked: false,
                     );
                     Navigator.pop(context, newCustomer);
                   },
@@ -783,7 +773,12 @@ class _CustomerMasterScreenState extends State<CustomerMasterScreen> {
                       ),
                       title: Text(c.displayName, style: TextStyle(fontWeight: FontWeight.bold, color: c.isLocked ? Colors.grey : Colors.black87)),
                       subtitle: Text("${c.formalName} ${c.title}"),
-                      onTap: widget.selectionMode ? () => Navigator.pop(context, c) : () => _showDetailPane(c),
+                      onTap: widget.selectionMode
+                          ? () {
+                              if (c.isHidden) return; // do not select hidden
+                              Navigator.pop(context, c);
+                            }
+                          : () => _showDetailPane(c),
                       trailing: widget.selectionMode
                           ? null
                           : IconButton(
@@ -861,23 +856,33 @@ class _CustomerMasterScreenState extends State<CustomerMasterScreen> {
               leading: const Icon(Icons.edit),
               title: const Text('編集'),
               enabled: !c.isLocked,
-              onTap: c.isLocked
+              onTap: () {
-                  ? null
+                Navigator.pop(context);
-                  : () {
+                _addOrEditCustomer(customer: c);
-                      Navigator.pop(context);
+              },
-                      _addOrEditCustomer(customer: c);
-                    },
             ),
             ListTile(
               leading: const Icon(Icons.contact_mail),
               title: const Text('連絡先を更新'),
+              enabled: !c.isLocked,
               onTap: () {
+                if (c.isLocked) return;
                 Navigator.pop(context);
                 _showContactUpdateDialog(c);
               },
             ),
             ListTile(
-              leading: const Icon(Icons.delete, color: Colors.redAccent),
+              leading: const Icon(Icons.visibility_off),
+              title: const Text('非表示にする'),
+              onTap: () async {
+                Navigator.pop(context);
+                await _customerRepo.setHidden(c.id, true);
+                if (!mounted) return;
+                _loadCustomers();
+              },
+            ),
+            ListTile(
+              leading: const Icon(Icons.delete_outline, color: Colors.redAccent),
               title: const Text('削除', style: TextStyle(color: Colors.redAccent)),
               enabled: !c.isLocked,
               onTap: c.isLocked
@@ -957,10 +962,12 @@ class _CustomerMasterScreenState extends State<CustomerMasterScreen> {
                   ),
                   const SizedBox(width: 8),
                   OutlinedButton.icon(
-                    onPressed: () {
+                    onPressed: c.isLocked
-                      Navigator.pop(context);
+                        ? null
-                      _showContactUpdateSheet(c);
+                        : () {
-                    },
+                            Navigator.pop(context);
+                            _showContactUpdateSheet(c);
+                          },
                     icon: const Icon(Icons.contact_mail),
                     label: const Text("連絡先を更新"),
                   ),
@@ -1018,7 +1025,9 @@ class _CustomerMasterScreenState extends State<CustomerMasterScreen> {
               ListTile(
                 leading: const Icon(Icons.contact_mail),
                 title: const Text('連絡先を更新'),
+                enabled: !c.isLocked,
                 onTap: () {
+                  if (c.isLocked) return;
                   Navigator.pop(context);
                   _showContactUpdateDialog(c);
                 },

lib/screens/customer_picker_modal.dart

@@ -4,6 +4,7 @@ import 'package:uuid/uuid.dart';
 import '../models/customer_model.dart';
 import '../services/customer_repository.dart';
 import '../widgets/keyboard_inset_wrapper.dart';
+import '../widgets/contact_picker_sheet.dart';
 
 /// 顧客マスターからの選択、登録、編集、削除を行うモーダル
 class CustomerPickerModal extends StatefulWidget {
@@ -55,7 +56,8 @@ class _CustomerPickerModalState extends State<CustomerPickerModal> {
         final Contact? selectedContact = await showModalBottomSheet<Contact?>(
           context: context,
           isScrollControlled: true,
-          builder: (context) => _PhoneContactListSelector(contacts: contacts),
+          backgroundColor: Colors.transparent,
+          builder: (context) => ContactPickerSheet(contacts: contacts, title: '電話帳から顧客候補を選択'),
         );
 
         if (!context.mounted) return;
@@ -316,66 +318,3 @@ class _CustomerPickerModalState extends State<CustomerPickerModal> {
   }
 }
 
-/// 電話帳から一人選ぶための内部ウィジェット
-class _PhoneContactListSelector extends StatefulWidget {
-  final List<Contact> contacts;
-  const _PhoneContactListSelector({required this.contacts});
-
-  @override
-  State<_PhoneContactListSelector> createState() => _PhoneContactListSelectorState();
-}
-
-class _PhoneContactListSelectorState extends State<_PhoneContactListSelector> {
-  List<Contact> _filtered = [];
-  final _searchController = TextEditingController();
-
-  @override
-  void initState() {
-    super.initState();
-    _filtered = widget.contacts;
-  }
-
-  void _onSearch(String q) {
-    setState(() {
-      _filtered = widget.contacts
-          .where((c) {
-            final org = c.organizations.isNotEmpty ? c.organizations.first.company : '';
-            final label = org.isNotEmpty ? org : c.displayName;
-            return label.toLowerCase().contains(q.toLowerCase());
-          })
-          .toList();
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return FractionallySizedBox(
-      heightFactor: 0.8,
-      child: Column(
-        children: [
-          Padding(
-            padding: const EdgeInsets.all(16.0),
-            child: TextField(
-              controller: _searchController,
-              decoration: const InputDecoration(hintText: "電話帳から検索...", prefixIcon: Icon(Icons.search)),
-              onChanged: _onSearch,
-            ),
-          ),
-          Expanded(
-            child: ListView.builder(
-              itemCount: _filtered.length,
-              itemBuilder: (context, index) => ListTile(
-                title: Text(
-                  _filtered[index].organizations.isNotEmpty && _filtered[index].organizations.first.company.isNotEmpty
-                      ? _filtered[index].organizations.first.company
-                      : _filtered[index].displayName,
-                ),
-                onTap: () => Navigator.pop(context, _filtered[index]),
-              ),
-            ),
-          ),
-        ],
-      ),
-    );
-  }
-}

lib/screens/dashboard_screen.dart

@@ -0,0 +1,281 @@
+import 'dart:io';
+import 'package:flutter/material.dart';
+import '../services/app_settings_repository.dart';
+import 'invoice_history_screen.dart';
+import 'invoice_input_screen.dart';
+import 'invoice_detail_page.dart';
+import 'customer_master_screen.dart';
+import 'product_master_screen.dart';
+import 'settings_screen.dart';
+import 'master_hub_page.dart';
+import '../models/invoice_models.dart';
+import '../services/location_service.dart';
+import '../services/customer_repository.dart';
+import '../widgets/slide_to_unlock.dart';
+import '../config/app_config.dart';
+
+class DashboardScreen extends StatefulWidget {
+  const DashboardScreen({super.key});
+
+  @override
+  State<DashboardScreen> createState() => _DashboardScreenState();
+}
+
+class _DashboardScreenState extends State<DashboardScreen> {
+  final _repo = AppSettingsRepository();
+  bool _loading = true;
+  bool _statusEnabled = true;
+  String _statusText = '工事中';
+  List<DashboardMenuItem> _menu = [];
+  bool _historyUnlocked = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _load();
+  }
+
+  Future<void> _load() async {
+    final statusEnabled = await _repo.getDashboardStatusEnabled();
+    final statusText = await _repo.getDashboardStatusText();
+    final rawMenu = await _repo.getDashboardMenu();
+    final enabledRoutes = AppConfig.enabledRoutes;
+    final menu = rawMenu.where((m) => enabledRoutes.contains(m.route)).toList();
+    final unlocked = await _repo.getDashboardHistoryUnlocked();
+    setState(() {
+      _statusEnabled = statusEnabled;
+      _statusText = statusText;
+      _menu = menu;
+      _loading = false;
+      _historyUnlocked = unlocked;
+    });
+  }
+
+  void _navigate(DashboardMenuItem item) async {
+    Widget? target;
+    final enabledRoutes = AppConfig.enabledRoutes;
+    if (!enabledRoutes.contains(item.route)) {
+      ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('この機能は現在ご利用いただけません')));
+      return;
+    }
+    switch (item.route) {
+      case 'invoice_history':
+        if (!_historyUnlocked) {
+          ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('ロックを解除してください')));
+          return;
+        }
+        target = const InvoiceHistoryScreen(initialUnlocked: true);
+        break;
+      case 'invoice_input':
+        target = InvoiceInputForm(
+          onInvoiceGenerated: (invoice, path) async {
+            final locationService = LocationService();
+            final pos = await locationService.getCurrentLocation();
+            if (pos != null) {
+              final customerRepo = CustomerRepository();
+              await customerRepo.addGpsHistory(invoice.customer.id, pos.latitude, pos.longitude);
+            }
+            if (!mounted) return;
+            Navigator.push(
+              context,
+              MaterialPageRoute(builder: (_) => InvoiceDetailPage(invoice: invoice)),
+            );
+          },
+          initialDocumentType: DocumentType.invoice,
+        );
+        break;
+      case 'customer_master':
+        target = const CustomerMasterScreen();
+        break;
+      case 'product_master':
+        target = const ProductMasterScreen();
+        break;
+      case 'master_hub':
+        target = const MasterHubPage();
+        break;
+      case 'settings':
+        target = const SettingsScreen();
+        break;
+      default:
+        target = const InvoiceHistoryScreen();
+        break;
+    }
+
+    await Navigator.push(context, MaterialPageRoute(builder: (_) => target!));
+    if (item.route == 'settings') {
+      await _load();
+    }
+  }
+
+  Widget _tile(DashboardMenuItem item) {
+    return GestureDetector(
+      onTap: () => _navigate(item),
+      child: Container(
+        decoration: BoxDecoration(
+          color: Colors.white,
+          borderRadius: BorderRadius.circular(12),
+          boxShadow: [
+            BoxShadow(color: Colors.black12, blurRadius: 6, offset: const Offset(0, 2)),
+          ],
+        ),
+        padding: const EdgeInsets.all(16),
+        child: Row(
+          children: [
+            _leading(item),
+            const SizedBox(width: 12),
+            Expanded(
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Text(item.title, style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 16)),
+                  const SizedBox(height: 4),
+                  Text(_routeLabel(item.route), style: const TextStyle(color: Colors.grey)),
+                ],
+              ),
+            ),
+            const Icon(Icons.chevron_right, color: Colors.grey),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _leading(DashboardMenuItem item) {
+    if (item.customIconPath != null && File(item.customIconPath!).existsSync()) {
+      return CircleAvatar(backgroundImage: FileImage(File(item.customIconPath!)), radius: 22);
+    }
+    return CircleAvatar(
+      radius: 22,
+      backgroundColor: Colors.indigo.shade50,
+      foregroundColor: Colors.indigo.shade700,
+      child: Icon(_iconForName(item.iconName ?? 'list_alt')),
+    );
+  }
+
+  IconData _iconForName(String name) {
+    return kIconsMap[name] ?? Icons.apps;
+  }
+
+  String _routeLabel(String route) {
+    switch (route) {
+      case 'invoice_history':
+        return 'A2:伝票一覧';
+      case 'invoice_input':
+        return 'A1:伝票入力';
+      case 'customer_master':
+        return 'C1:顧客マスター';
+      case 'product_master':
+        return 'P1:商品マスター';
+      case 'master_hub':
+        return 'M1:マスター管理';
+      case 'settings':
+        return 'S1:設定';
+      default:
+        return route;
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        automaticallyImplyLeading: false,
+        title: const Text('D1:ダッシュボード'),
+        actions: [
+          IconButton(icon: const Icon(Icons.refresh), onPressed: _load),
+          IconButton(
+            icon: const Icon(Icons.settings),
+            onPressed: () async {
+              await Navigator.push(context, MaterialPageRoute(builder: (_) => const SettingsScreen()));
+              await _load();
+            },
+          ),
+        ],
+      ),
+      body: _loading
+          ? const Center(child: CircularProgressIndicator())
+          : RefreshIndicator(
+              onRefresh: _load,
+              child: ListView(
+                padding: const EdgeInsets.all(16),
+                children: [
+                  Padding(
+                    padding: const EdgeInsets.only(bottom: 16),
+                    child: _historyUnlocked
+                        ? Row(
+                            children: [
+                              const Icon(Icons.lock_open, color: Colors.green),
+                              const SizedBox(width: 8),
+                              const Expanded(child: Text('A2ロック解除済')),
+                              OutlinedButton.icon(
+                                onPressed: () async {
+                                  setState(() => _historyUnlocked = false);
+                                  await _repo.setDashboardHistoryUnlocked(false);
+                                },
+                                icon: const Icon(Icons.lock),
+                                label: const Text('再ロック'),
+                              ),
+                            ],
+                          )
+                        : SlideToUnlock(
+                            isLocked: !_historyUnlocked,
+                            onUnlocked: () async {
+                              setState(() => _historyUnlocked = true);
+                              await _repo.setDashboardHistoryUnlocked(true);
+                            },
+                            text: 'スライドでロック解除 (A2)',
+                          ),
+                  ),
+                  if (_statusEnabled)
+                    Container(
+                      width: double.infinity,
+                      padding: const EdgeInsets.all(16),
+                      margin: const EdgeInsets.only(bottom: 16),
+                      decoration: BoxDecoration(
+                        color: Colors.orange.shade50,
+                        borderRadius: BorderRadius.circular(12),
+                        border: Border.all(color: Colors.orange.shade200),
+                      ),
+                      child: Row(
+                        children: [
+                          const Icon(Icons.info_outline, color: Colors.orange),
+                          const SizedBox(width: 12),
+                          Expanded(child: Text(_statusText, style: const TextStyle(fontWeight: FontWeight.bold))),
+                        ],
+                      ),
+                    ),
+                  ..._menu.map((e) => Padding(
+                        padding: const EdgeInsets.only(bottom: 12),
+                        child: _tile(e),
+                      )),
+                  if (_menu.isEmpty)
+                    const Center(
+                      child: Padding(
+                        padding: EdgeInsets.all(24),
+                        child: Text('メニューが未設定です。設定画面から追加してください。'),
+                      ),
+                    )
+                ],
+              ),
+            ),
+    );
+  }
+}
+
+// fallback icon map for dashboard
+const Map<String, IconData> kIconsMap = {
+  'list_alt': Icons.list_alt,
+  'edit_note': Icons.edit_note,
+  'history': Icons.history,
+  'settings': Icons.settings,
+  'invoice': Icons.receipt_long,
+  'customer': Icons.people,
+  'product': Icons.inventory_2,
+  'menu': Icons.menu,
+  'analytics': Icons.analytics,
+  'map': Icons.map,
+  'master': Icons.storage,
+  'qr': Icons.qr_code,
+  'camera': Icons.camera_alt,
+  'contact': Icons.contact_mail,
+};

lib/screens/email_settings_screen.dart

@@ -0,0 +1,586 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../constants/mail_send_method.dart';
+import '../constants/mail_templates.dart';
+import '../services/app_settings_repository.dart';
+import '../services/email_sender.dart';
+
+class EmailSettingsScreen extends StatefulWidget {
+  const EmailSettingsScreen({super.key});
+
+  @override
+  State<EmailSettingsScreen> createState() => _EmailSettingsScreenState();
+}
+
+class _EmailSettingsScreenState extends State<EmailSettingsScreen> {
+  final _appSettingsRepo = AppSettingsRepository();
+
+  final _smtpHostCtrl = TextEditingController();
+  final _smtpPortCtrl = TextEditingController(text: '587');
+  final _smtpUserCtrl = TextEditingController();
+  final _smtpPassCtrl = TextEditingController();
+  final _smtpBccCtrl = TextEditingController();
+  final _mailHeaderCtrl = TextEditingController();
+  final _mailFooterCtrl = TextEditingController();
+
+  bool _smtpTls = true;
+  bool _smtpIgnoreBadCert = false;
+  bool _loadingLogs = false;
+  String _mailSendMethod = kMailSendMethodSmtp;
+  List<String> _smtpLogs = [];
+  String _mailHeaderTemplateId = kMailTemplateIdDefault;
+  String _mailFooterTemplateId = kMailTemplateIdDefault;
+
+  static const _kSmtpHost = 'smtp_host';
+  static const _kSmtpPort = 'smtp_port';
+  static const _kSmtpUser = 'smtp_user';
+  static const _kSmtpPass = 'smtp_pass';
+  static const _kSmtpTls = 'smtp_tls';
+  static const _kSmtpBcc = 'smtp_bcc';
+  static const _kSmtpIgnoreBadCert = 'smtp_ignore_bad_cert';
+  static const _kMailSendMethod = kMailSendMethodPrefKey;
+  static const _kMailHeaderTemplate = kMailHeaderTemplateKey;
+  static const _kMailFooterTemplate = kMailFooterTemplateKey;
+  static const _kMailHeaderText = kMailHeaderTextKey;
+  static const _kMailFooterText = kMailFooterTextKey;
+  static const _kCryptKey = 'test';
+
+  @override
+  void initState() {
+    super.initState();
+    _loadAll();
+  }
+
+  @override
+  void dispose() {
+    _smtpHostCtrl.dispose();
+    _smtpPortCtrl.dispose();
+    _smtpUserCtrl.dispose();
+    _smtpPassCtrl.dispose();
+    _smtpBccCtrl.dispose();
+    _mailHeaderCtrl.dispose();
+    _mailFooterCtrl.dispose();
+    super.dispose();
+  }
+
+  Future<void> _loadAll() async {
+    final prefs = await SharedPreferences.getInstance();
+    final hostPref = prefs.getString(_kSmtpHost);
+    final smtpHost = hostPref ?? await _appSettingsRepo.getString(_kSmtpHost) ?? '';
+    final portPref = prefs.getString(_kSmtpPort);
+    final smtpPort = (portPref ?? await _appSettingsRepo.getString(_kSmtpPort) ?? '587').trim().isEmpty
+        ? '587'
+        : (portPref ?? await _appSettingsRepo.getString(_kSmtpPort) ?? '587');
+    final userPref = prefs.getString(_kSmtpUser);
+    final smtpUser = userPref ?? await _appSettingsRepo.getString(_kSmtpUser) ?? '';
+    final passPref = prefs.getString(_kSmtpPass);
+    final smtpPassEncrypted = passPref ?? await _appSettingsRepo.getString(_kSmtpPass) ?? '';
+    final smtpPass = _decryptWithFallback(smtpPassEncrypted);
+    final tlsPrefExists = prefs.containsKey(_kSmtpTls);
+    final smtpTls = tlsPrefExists ? (prefs.getBool(_kSmtpTls) ?? true) : await _appSettingsRepo.getBool(_kSmtpTls, defaultValue: true);
+    final bccPref = prefs.getString(_kSmtpBcc);
+    final smtpBcc = bccPref ?? await _appSettingsRepo.getString(_kSmtpBcc) ?? '';
+    final ignorePrefExists = prefs.containsKey(_kSmtpIgnoreBadCert);
+    final smtpIgnoreBadCert = ignorePrefExists
+        ? (prefs.getBool(_kSmtpIgnoreBadCert) ?? false)
+        : await _appSettingsRepo.getBool(_kSmtpIgnoreBadCert, defaultValue: false);
+
+    final mailSendMethodPref = prefs.getString(_kMailSendMethod);
+    final mailSendMethodDb = await _appSettingsRepo.getString(_kMailSendMethod) ?? kMailSendMethodSmtp;
+    final resolvedMailSendMethod = normalizeMailSendMethod(mailSendMethodPref ?? mailSendMethodDb);
+
+    final headerTemplatePref = prefs.getString(_kMailHeaderTemplate);
+    final headerTemplateDb = await _appSettingsRepo.getString(_kMailHeaderTemplate) ?? kMailTemplateIdDefault;
+    final resolvedHeaderTemplate = headerTemplatePref ?? headerTemplateDb;
+    final headerTextPref = prefs.getString(_kMailHeaderText);
+    final headerTextDb = await _appSettingsRepo.getString(_kMailHeaderText) ?? kMailHeaderTemplateDefault;
+    final resolvedHeaderText = headerTextPref ?? headerTextDb;
+
+    final footerTemplatePref = prefs.getString(_kMailFooterTemplate);
+    final footerTemplateDb = await _appSettingsRepo.getString(_kMailFooterTemplate) ?? kMailTemplateIdDefault;
+    final resolvedFooterTemplate = footerTemplatePref ?? footerTemplateDb;
+    final footerTextPref = prefs.getString(_kMailFooterText);
+    final footerTextDb = await _appSettingsRepo.getString(_kMailFooterText) ?? kMailFooterTemplateDefault;
+    final resolvedFooterText = footerTextPref ?? footerTextDb;
+
+    final needsPrefSync =
+        hostPref == null ||
+            portPref == null ||
+            userPref == null ||
+            passPref == null ||
+            bccPref == null ||
+            !tlsPrefExists ||
+            !ignorePrefExists ||
+            mailSendMethodPref == null ||
+            headerTemplatePref == null ||
+            headerTextPref == null ||
+            footerTemplatePref == null ||
+            footerTextPref == null;
+    if (needsPrefSync) {
+      await _saveSmtpPrefs(
+        host: smtpHost,
+        port: smtpPort,
+        user: smtpUser,
+        encryptedPass: smtpPassEncrypted,
+        tls: smtpTls,
+        bcc: smtpBcc,
+        ignoreBadCert: smtpIgnoreBadCert,
+        mailSendMethod: resolvedMailSendMethod,
+        headerTemplate: resolvedHeaderTemplate,
+        headerText: resolvedHeaderText,
+        footerTemplate: resolvedFooterTemplate,
+        footerText: resolvedFooterText,
+      );
+    }
+
+    setState(() {
+      _smtpHostCtrl.text = smtpHost;
+      _smtpPortCtrl.text = smtpPort;
+      _smtpUserCtrl.text = smtpUser;
+      _smtpPassCtrl.text = smtpPass;
+      _smtpBccCtrl.text = smtpBcc;
+      _smtpTls = smtpTls;
+      _smtpIgnoreBadCert = smtpIgnoreBadCert;
+      _mailSendMethod = resolvedMailSendMethod;
+      _mailHeaderTemplateId = resolvedHeaderTemplate;
+      _mailFooterTemplateId = resolvedFooterTemplate;
+      _mailHeaderCtrl.text = resolvedHeaderText;
+      _mailFooterCtrl.text = resolvedFooterText;
+    });
+
+    await _loadSmtpLogs();
+  }
+
+  Future<void> _loadSmtpLogs() async {
+    setState(() => _loadingLogs = true);
+    final logs = await EmailSender.loadLogs();
+    if (!mounted) return;
+    setState(() {
+      _smtpLogs = logs;
+      _loadingLogs = false;
+    });
+  }
+
+  Future<void> _clearSmtpLogs() async {
+    await EmailSender.clearLogs();
+    await _loadSmtpLogs();
+  }
+
+  Future<void> _copySmtpLogs() async {
+    if (_smtpLogs.isEmpty) return;
+    await Clipboard.setData(ClipboardData(text: _smtpLogs.join('\n')));
+    _showSnackbar('ログをクリップボードにコピーしました');
+  }
+
+  Future<void> _saveSmtp() async {
+    final host = _smtpHostCtrl.text.trim();
+    final port = _smtpPortCtrl.text.trim().isEmpty ? '587' : _smtpPortCtrl.text.trim();
+    final user = _smtpUserCtrl.text.trim();
+    final passPlain = _smtpPassCtrl.text;
+    final passEncrypted = _encrypt(passPlain);
+    final bcc = _smtpBccCtrl.text.trim();
+
+    if (bcc.isEmpty) {
+      _showSnackbar('BCCは必須項目です');
+      return;
+    }
+
+    await _appSettingsRepo.setString(_kSmtpHost, host);
+    await _appSettingsRepo.setString(_kSmtpPort, port);
+    await _appSettingsRepo.setString(_kSmtpUser, user);
+    await _appSettingsRepo.setString(_kSmtpPass, passEncrypted);
+    await _appSettingsRepo.setBool(_kSmtpTls, _smtpTls);
+    await _appSettingsRepo.setString(_kSmtpBcc, bcc);
+    await _appSettingsRepo.setBool(_kSmtpIgnoreBadCert, _smtpIgnoreBadCert);
+    await _appSettingsRepo.setString(_kMailSendMethod, _mailSendMethod);
+    await _appSettingsRepo.setString(_kMailHeaderTemplate, _mailHeaderTemplateId);
+    await _appSettingsRepo.setString(_kMailFooterTemplate, _mailFooterTemplateId);
+    await _appSettingsRepo.setString(_kMailHeaderText, _mailHeaderCtrl.text);
+    await _appSettingsRepo.setString(_kMailFooterText, _mailFooterCtrl.text);
+
+    await _saveSmtpPrefs(
+      host: host,
+      port: port,
+      user: user,
+      encryptedPass: passEncrypted,
+      tls: _smtpTls,
+      bcc: bcc,
+      ignoreBadCert: _smtpIgnoreBadCert,
+      mailSendMethod: _mailSendMethod,
+      headerTemplate: _mailHeaderTemplateId,
+      headerText: _mailHeaderCtrl.text,
+      footerTemplate: _mailFooterTemplateId,
+      footerText: _mailFooterCtrl.text,
+    );
+    _showSnackbar('メール設定を保存しました');
+  }
+
+  Future<void> _saveSmtpPrefs({
+    required String host,
+    required String port,
+    required String user,
+    required String encryptedPass,
+    required bool tls,
+    required String bcc,
+    required bool ignoreBadCert,
+    required String mailSendMethod,
+    required String headerTemplate,
+    required String headerText,
+    required String footerTemplate,
+    required String footerText,
+  }) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString(_kSmtpHost, host);
+    await prefs.setString(_kSmtpPort, port);
+    await prefs.setString(_kSmtpUser, user);
+    await prefs.setString(_kSmtpPass, encryptedPass);
+    await prefs.setBool(_kSmtpTls, tls);
+    await prefs.setString(_kSmtpBcc, bcc);
+    await prefs.setBool(_kSmtpIgnoreBadCert, ignoreBadCert);
+    await prefs.setString(_kMailSendMethod, mailSendMethod);
+    await prefs.setString(_kMailHeaderTemplate, headerTemplate);
+    await prefs.setString(_kMailHeaderText, headerText);
+    await prefs.setString(_kMailFooterTemplate, footerTemplate);
+    await prefs.setString(_kMailFooterText, footerText);
+  }
+
+  Future<void> _testSmtp() async {
+    try {
+      if (_mailSendMethod != kMailSendMethodSmtp) {
+        _showSnackbar('SMTPテストは送信方法を「SMTP」に設定した時のみ利用できます');
+        return;
+      }
+      await _saveSmtp();
+      final config = await EmailSender.loadConfigFromPrefs();
+      if (config == null || config.bcc.isEmpty) {
+        _showSnackbar('ホスト/ユーザー/パスワード/BCCを入力してください');
+        return;
+      }
+
+      await EmailSender.sendTest(config: config);
+      _showSnackbar('テスト送信に成功しました');
+    } catch (e) {
+      _showSnackbar('テスト送信に失敗しました: $e');
+    }
+    await _loadSmtpLogs();
+  }
+
+  Future<void> _updateMailSendMethod(String method) async {
+    final normalized = normalizeMailSendMethod(method);
+    setState(() => _mailSendMethod = normalized);
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString(_kMailSendMethod, normalized);
+    await _appSettingsRepo.setString(_kMailSendMethod, normalized);
+  }
+
+  void _applyHeaderTemplate(String templateId) {
+    setState(() => _mailHeaderTemplateId = templateId);
+    if (templateId == kMailTemplateIdDefault) {
+      _mailHeaderCtrl.text = kMailHeaderTemplateDefault;
+    } else if (templateId == kMailTemplateIdNone) {
+      _mailHeaderCtrl.clear();
+    }
+  }
+
+  void _applyFooterTemplate(String templateId) {
+    setState(() => _mailFooterTemplateId = templateId);
+    if (templateId == kMailTemplateIdDefault) {
+      _mailFooterCtrl.text = kMailFooterTemplateDefault;
+    } else if (templateId == kMailTemplateIdNone) {
+      _mailFooterCtrl.clear();
+    }
+  }
+
+  String _encrypt(String plain) {
+    if (plain.isEmpty) return '';
+    final pb = utf8.encode(plain);
+    final kb = utf8.encode(_kCryptKey);
+    final ob = List<int>.generate(pb.length, (i) => pb[i] ^ kb[i % kb.length]);
+    return base64Encode(ob);
+  }
+
+  String _decryptWithFallback(String cipher) {
+    if (cipher.isEmpty) return '';
+    try {
+      final ob = base64Decode(cipher);
+      final kb = utf8.encode(_kCryptKey);
+      final pb = List<int>.generate(ob.length, (i) => ob[i] ^ kb[i % kb.length]);
+      return utf8.decode(pb);
+    } catch (_) {
+      return cipher;
+    }
+  }
+
+  void _showSnackbar(String msg) {
+    ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(msg)));
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final bottomInset = MediaQuery.of(context).viewInsets.bottom;
+    final listBottomPadding = 24 + bottomInset;
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('SM:メール設定'),
+        backgroundColor: Colors.indigo,
+      ),
+      body: Padding(
+        padding: const EdgeInsets.all(16),
+        child: ListView(
+          keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
+          padding: EdgeInsets.only(bottom: listBottomPadding),
+          children: [
+            _section(
+              title: '送信設定',
+              subtitle: 'SMTP / 端末メーラー切り替えやBCC必須設定',
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  DropdownButtonFormField<String>(
+                    decoration: const InputDecoration(labelText: '送信方法'),
+                    initialValue: _mailSendMethod,
+                    items: const [
+                      DropdownMenuItem(value: kMailSendMethodSmtp, child: Text('SMTPサーバー経由')),
+                      DropdownMenuItem(value: kMailSendMethodDeviceMailer, child: Text('端末メーラーで送信')),
+                    ],
+                    onChanged: (value) {
+                      if (value != null) {
+                        _updateMailSendMethod(value);
+                      }
+                    },
+                  ),
+                  const SizedBox(height: 8),
+                  if (_mailSendMethod == kMailSendMethodDeviceMailer)
+                    Container(
+                      width: double.infinity,
+                      padding: const EdgeInsets.all(12),
+                      decoration: BoxDecoration(
+                        color: Colors.orange.shade50,
+                        border: Border.all(color: Colors.orange.shade200),
+                        borderRadius: BorderRadius.circular(8),
+                      ),
+                      child: const Text(
+                        '端末メーラーで送信する場合もBCCは必須です。SMTP設定は保持されますが、送信時は端末のメールアプリが起動します。',
+                        style: TextStyle(fontSize: 12, color: Colors.black87),
+                      ),
+                    ),
+                  const SizedBox(height: 12),
+                  TextField(
+                    controller: _smtpHostCtrl,
+                    decoration: const InputDecoration(labelText: 'SMTPホスト名'),
+                    enabled: _mailSendMethod == kMailSendMethodSmtp,
+                  ),
+                  TextField(
+                    controller: _smtpPortCtrl,
+                    decoration: const InputDecoration(labelText: 'SMTPポート番号'),
+                    keyboardType: TextInputType.number,
+                    enabled: _mailSendMethod == kMailSendMethodSmtp,
+                  ),
+                  TextField(
+                    controller: _smtpUserCtrl,
+                    decoration: const InputDecoration(labelText: 'SMTPユーザー名'),
+                    enabled: _mailSendMethod == kMailSendMethodSmtp,
+                  ),
+                  TextField(
+                    controller: _smtpPassCtrl,
+                    decoration: const InputDecoration(labelText: 'SMTPパスワード'),
+                    obscureText: true,
+                    enabled: _mailSendMethod == kMailSendMethodSmtp,
+                  ),
+                  TextField(
+                    controller: _smtpBccCtrl,
+                    decoration: const InputDecoration(labelText: 'BCC (カンマ区切り可) *必須'),
+                  ),
+                  SwitchListTile(
+                    title: const Text('STARTTLS を使用'),
+                    value: _smtpTls,
+                    onChanged: _mailSendMethod == kMailSendMethodSmtp ? (v) => setState(() => _smtpTls = v) : null,
+                  ),
+                  SwitchListTile(
+                    title: const Text('証明書検証をスキップ（開発用）'),
+                    subtitle: const Text('自己署名/ホスト名不一致を許可します'),
+                    value: _smtpIgnoreBadCert,
+                    onChanged: _mailSendMethod == kMailSendMethodSmtp ? (v) => setState(() => _smtpIgnoreBadCert = v) : null,
+                  ),
+                  const SizedBox(height: 8),
+                  Row(
+                    children: [
+                      Expanded(
+                        child: ElevatedButton.icon(
+                          icon: const Icon(Icons.save),
+                          label: const Text('保存'),
+                          onPressed: _saveSmtp,
+                        ),
+                      ),
+                      const SizedBox(width: 12),
+                      Expanded(
+                        child: ElevatedButton.icon(
+                          icon: const Icon(Icons.send),
+                          label: const Text('BCC宛にテスト送信'),
+                          onPressed: _mailSendMethod == kMailSendMethodSmtp ? _testSmtp : null,
+                        ),
+                      ),
+                    ],
+                  ),
+                ],
+              ),
+            ),
+            _section(
+              title: '通信ログ',
+              subtitle: '最大1000行まで保持されます（SMTP/端末メーラー共通）',
+              child: Column(
+                children: [
+                  Row(
+                    children: [
+                      const Expanded(child: Text('ログ一覧', style: TextStyle(fontWeight: FontWeight.bold))),
+                      IconButton(
+                        tooltip: '再読込',
+                        icon: const Icon(Icons.refresh),
+                        onPressed: _loadingLogs ? null : _loadSmtpLogs,
+                      ),
+                      IconButton(
+                        tooltip: 'コピー',
+                        icon: const Icon(Icons.copy),
+                        onPressed: _smtpLogs.isEmpty ? null : _copySmtpLogs,
+                      ),
+                      IconButton(
+                        tooltip: 'クリア',
+                        icon: const Icon(Icons.delete_outline),
+                        onPressed: _smtpLogs.isEmpty ? null : _clearSmtpLogs,
+                      ),
+                    ],
+                  ),
+                  const SizedBox(height: 8),
+                  Container(
+                    height: 220,
+                    decoration: BoxDecoration(
+                      color: Colors.grey.shade100,
+                      border: Border.all(color: Colors.grey.shade300),
+                      borderRadius: BorderRadius.circular(8),
+                    ),
+                    child: _loadingLogs
+                        ? const Center(child: CircularProgressIndicator())
+                        : _smtpLogs.isEmpty
+                            ? const Center(child: Text('ログなし'))
+                            : Scrollbar(
+                                child: SelectionArea(
+                                  child: ListView.builder(
+                                    padding: const EdgeInsets.all(8),
+                                    itemCount: _smtpLogs.length,
+                                    itemBuilder: (context, index) => Text(
+                                      _smtpLogs[index],
+                                      style: const TextStyle(fontSize: 12, fontFamily: 'monospace'),
+                                    ),
+                                  ),
+                                ),
+                              ),
+                  ),
+                ],
+              ),
+            ),
+            _section(
+              title: 'メール本文ヘッダ/フッタ',
+              subtitle: 'テンプレを選択して編集するか、自由にテキストを入力できます（{{FILENAME}}, {{HASH}} が利用可）',
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Text('ヘッダテンプレ', style: Theme.of(context).textTheme.labelLarge),
+                  const SizedBox(height: 4),
+                  Row(
+                    children: [
+                      Expanded(
+                        child: DropdownButtonFormField<String>(
+                          initialValue: _mailHeaderTemplateId,
+                          items: const [
+                            DropdownMenuItem(value: kMailTemplateIdDefault, child: Text('デフォルト')), 
+                            DropdownMenuItem(value: kMailTemplateIdNone, child: Text('なし / 空テンプレ')),
+                          ],
+                          onChanged: (v) {
+                            if (v != null) {
+                              _applyHeaderTemplate(v);
+                            }
+                          },
+                        ),
+                      ),
+                      const SizedBox(width: 8),
+                      OutlinedButton(
+                        onPressed: () => _applyHeaderTemplate(_mailHeaderTemplateId),
+                        child: const Text('テンプレ適用'),
+                      ),
+                    ],
+                  ),
+                  const SizedBox(height: 8),
+                  TextField(
+                    controller: _mailHeaderCtrl,
+                    keyboardType: TextInputType.multiline,
+                    maxLines: null,
+                    decoration: const InputDecoration(border: OutlineInputBorder(), hintText: 'メールヘッダ文…'),
+                  ),
+                  const SizedBox(height: 16),
+                  Text('フッタテンプレ', style: Theme.of(context).textTheme.labelLarge),
+                  const SizedBox(height: 4),
+                  Row(
+                    children: [
+                      Expanded(
+                        child: DropdownButtonFormField<String>(
+                          initialValue: _mailFooterTemplateId,
+                          items: const [
+                            DropdownMenuItem(value: kMailTemplateIdDefault, child: Text('デフォルト')),
+                            DropdownMenuItem(value: kMailTemplateIdNone, child: Text('なし / 空テンプレ')),
+                          ],
+                          onChanged: (v) {
+                            if (v != null) {
+                              _applyFooterTemplate(v);
+                            }
+                          },
+                        ),
+                      ),
+                      const SizedBox(width: 8),
+                      OutlinedButton(
+                        onPressed: () => _applyFooterTemplate(_mailFooterTemplateId),
+                        child: const Text('テンプレ適用'),
+                      ),
+                    ],
+                  ),
+                  const SizedBox(height: 8),
+                  TextField(
+                    controller: _mailFooterCtrl,
+                    keyboardType: TextInputType.multiline,
+                    maxLines: null,
+                    decoration: const InputDecoration(border: OutlineInputBorder(), hintText: 'メールフッタ文…'),
+                  ),
+                  const SizedBox(height: 8),
+                  const Text('※ {{FILENAME}} と {{HASH}} は送信時に自動置換されます。'),
+                ],
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _section({required String title, required String subtitle, required Widget child}) {
+    return Card(
+      margin: const EdgeInsets.only(bottom: 16),
+      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+      child: Padding(
+        padding: const EdgeInsets.all(16),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text(title, style: const TextStyle(fontSize: 16, fontWeight: FontWeight.bold)),
+            const SizedBox(height: 4),
+            Text(subtitle, style: const TextStyle(color: Colors.grey)),
+            const SizedBox(height: 12),
+            child,
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/screens/invoice_detail_page.dart

@@ -12,6 +12,7 @@ import '../services/company_repository.dart';
 import 'product_picker_modal.dart';
 import '../models/company_model.dart';
 import '../widgets/keyboard_inset_wrapper.dart';
+import '../services/app_settings_repository.dart';
 
 class _DetailSnapshot {
   final String formalName;
@@ -31,6 +32,25 @@ class _DetailSnapshot {
   });
 }
 
+class _DraftBadge extends StatelessWidget {
+  const _DraftBadge();
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 2),
+      decoration: BoxDecoration(
+        color: Colors.orange.shade100,
+        borderRadius: BorderRadius.circular(10),
+      ),
+      child: const Text(
+        '下書き',
+        style: TextStyle(fontSize: 11, fontWeight: FontWeight.w700, color: Colors.orange),
+      ),
+    );
+  }
+}
+
 List<InvoiceItem> _cloneItemsDetail(List<InvoiceItem> source) {
   return source
       .map((e) => InvoiceItem(
@@ -63,14 +83,16 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
   late double _taxRate; // 追加
   late bool _includeTax; // 追加
   String? _currentFilePath;
-  final _invoiceRepo = InvoiceRepository();
+  final InvoiceRepository _invoiceRepo = InvoiceRepository();
-  final _customerRepo = CustomerRepository();
+  final CustomerRepository _customerRepo = CustomerRepository();
-  final _companyRepo = CompanyRepository();
+  final CompanyRepository _companyRepo = CompanyRepository();
+  final AppSettingsRepository _settingsRepo = AppSettingsRepository(); // 追加
   CompanyInfo? _companyInfo;
   bool _showFormalWarning = true;
   final List<_DetailSnapshot> _undoStack = [];
   final List<_DetailSnapshot> _redoStack = [];
   bool _isApplyingSnapshot = false;
+  bool _summaryIsBlue = false; // デフォルトは白
 
   @override
   void initState() {
@@ -84,6 +106,13 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
     _includeTax = _currentInvoice.taxRate > 0; // 初期化
     _isEditing = false;
     _loadCompanyInfo();
+    _loadSummaryTheme();
+  }
+
+  Future<void> _loadSummaryTheme() async {
+    final saved = await _settingsRepo.getSummaryTheme();
+    if (!mounted) return;
+    setState(() => _summaryIsBlue = saved == 'blue');
   }
 
   Future<void> _loadCompanyInfo() async {
@@ -186,12 +215,39 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
     SharePlus.instance.share(ShareParams(text: csvData, subject: '請求書データ_CSV'));
   }
 
+  Future<void> _pickSummaryColor() async {
+    final selected = await showModalBottomSheet<String>(
+      context: context,
+      shape: const RoundedRectangleBorder(borderRadius: BorderRadius.vertical(top: Radius.circular(16))),
+      builder: (context) => SafeArea(
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            ListTile(
+              leading: const Icon(Icons.palette, color: Colors.indigo),
+              title: const Text('インディゴ'),
+              onTap: () => Navigator.pop(context, 'blue'),
+            ),
+            ListTile(
+              leading: const Icon(Icons.palette, color: Colors.grey),
+              title: const Text('白'),
+              onTap: () => Navigator.pop(context, 'white'),
+            ),
+          ],
+        ),
+      ),
+    );
+    if (selected == null) return;
+    setState(() => _summaryIsBlue = selected == 'blue');
+    await _settingsRepo.setSummaryTheme(selected);
+  }
+
   @override
   Widget build(BuildContext context) {
     final fmt = NumberFormat("#,###");
     final isDraft = _currentInvoice.isDraft;
     final docTypeName = _currentInvoice.documentTypeName;
-    final themeColor = Colors.white; // 常に明色
+    final themeColor = Theme.of(context).scaffoldBackgroundColor;
     final textColor = Colors.black87;
 
     final locked = _currentInvoice.isLocked;
@@ -292,18 +348,18 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
                   padding: const EdgeInsets.all(10),
                   margin: const EdgeInsets.only(bottom: 8),
                   decoration: BoxDecoration(
-                    color: Colors.indigo.shade800,
+                    color: Colors.indigo, // 合計金額と同じカラー
                     borderRadius: BorderRadius.circular(8),
-                    border: Border.all(color: Colors.indigo.shade900),
+                    border: Border.all(color: Colors.indigo.shade700),
                   ),
                   child: Row(
                     children: [
                       const Icon(Icons.edit_note, color: Colors.white70),
                       const SizedBox(width: 8),
-                      Expanded(
+                      const Expanded(
                         child: Text(
-                          "下書き: 未確定・PDFは正式発行で確定",
+                          "未確定・PDFは正式発行で確定",
-                          style: const TextStyle(color: Colors.white70),
+                          style: TextStyle(color: Colors.white70),
                         ),
                       ),
                       const SizedBox(width: 8),
@@ -314,7 +370,7 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
                           borderRadius: BorderRadius.circular(16),
                         ),
                         child: Text(
-                          "下書${docTypeName}",
+                          "下書$docTypeName",
                           style: const TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 12),
                         ),
                       ),
@@ -406,8 +462,15 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
             width: double.infinity,
             padding: const EdgeInsets.all(12),
             decoration: BoxDecoration(
-              color: Colors.grey.shade100,
+              color: Colors.white,
               borderRadius: BorderRadius.circular(12),
+              boxShadow: [
+                BoxShadow(
+                  color: Colors.black.withValues(alpha: 0.08),
+                  blurRadius: 8,
+                  offset: const Offset(0, 4),
+                ),
+              ],
             ),
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
@@ -417,25 +480,34 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
                 Text("${_currentInvoice.customerNameForDisplay} ${_currentInvoice.customer.title}",
                     style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold, color: textColor)),
                 if (_currentInvoice.subject?.isNotEmpty ?? false) ...[
-                  const SizedBox(height: 6),
+                  const SizedBox(height: 8),
-                  Text("件名: ${_currentInvoice.subject}",
+                  const Text("件名", style: TextStyle(fontSize: 12, fontWeight: FontWeight.bold, color: Colors.black54)),
-                      style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold, color: Colors.indigo)),
+                  const SizedBox(height: 2),
-                ],
-                if (_currentInvoice.customer.department != null && _currentInvoice.customer.department!.isNotEmpty)
-                  Text(_currentInvoice.customer.department!, style: TextStyle(fontSize: 14, color: textColor)),
-                if ((_currentInvoice.contactAddressSnapshot ?? _currentInvoice.customer.address) != null)
-                  Text("住所: ${_currentInvoice.contactAddressSnapshot ?? _currentInvoice.customer.address}", style: TextStyle(color: textColor)),
-                if ((_currentInvoice.contactTelSnapshot ?? _currentInvoice.customer.tel) != null)
-                  Text("TEL: ${_currentInvoice.contactTelSnapshot ?? _currentInvoice.customer.tel}", style: TextStyle(color: textColor)),
-                if ((_currentInvoice.contactEmailSnapshot ?? _currentInvoice.customer.email) != null)
-                  Text("メール: ${_currentInvoice.contactEmailSnapshot ?? _currentInvoice.customer.email}", style: TextStyle(color: textColor)),
-                if (_currentInvoice.notes?.isNotEmpty ?? false) ...[
-                  const SizedBox(height: 6),
                   Text(
-                    "備考: ${_currentInvoice.notes}",
+                    _currentInvoice.subject!,
-                    style: TextStyle(color: textColor.withAlpha((0.9 * 255).round())),
+                    style: const TextStyle(fontSize: 16, fontWeight: FontWeight.bold, color: Colors.indigo),
                   ),
                 ],
+                const SizedBox(height: 6),
+                Padding(
+                  padding: const EdgeInsets.only(left: 8.0),
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      if (_currentInvoice.customer.department != null && _currentInvoice.customer.department!.isNotEmpty)
+                        Text(_currentInvoice.customer.department!, style: TextStyle(fontSize: 14, color: textColor)),
+                      if ((_currentInvoice.contactEmailSnapshot ?? _currentInvoice.customer.email) != null)
+                        Text("メール: ${_currentInvoice.contactEmailSnapshot ?? _currentInvoice.customer.email}", style: TextStyle(color: textColor)),
+                      if (_currentInvoice.notes?.isNotEmpty ?? false) ...[
+                        const SizedBox(height: 6),
+                        Text(
+                          "備考: ${_currentInvoice.notes}",
+                          style: TextStyle(color: textColor.withAlpha((0.9 * 255).round())),
+                        ),
+                      ],
+                    ],
+                  ),
+                ),
               ],
             ),
           ),
@@ -520,32 +592,43 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
     final int tax = (subtotal * currentTaxRate).floor();
     final int total = subtotal + tax;
 
-    return Container(
+    final bool useBlue = _summaryIsBlue;
-      width: double.infinity,
+    final Color bgColor = useBlue ? Colors.indigo : Colors.white;
-      padding: const EdgeInsets.all(16),
+    final Color borderColor = useBlue ? Colors.transparent : Colors.grey.shade300;
-      decoration: BoxDecoration(
+    final Color labelColor = useBlue ? Colors.white70 : Colors.black87;
-        color: Colors.indigo,
+    final Color totalColor = useBlue ? Colors.white : Colors.black87;
-        borderRadius: BorderRadius.circular(12),
+    final Color dividerColor = useBlue ? Colors.white24 : Colors.grey.shade300;
-      ),
+
-      child: Column(
+    return GestureDetector(
-        crossAxisAlignment: CrossAxisAlignment.start,
+      onLongPress: _pickSummaryColor,
-        children: [
+      child: Container(
-          _buildSummaryRow("小計", "￥${formatter.format(subtotal)}", Colors.white70),
+        width: double.infinity,
-          if (currentTaxRate > 0) ...[
+        padding: const EdgeInsets.all(16),
-            const Divider(color: Colors.white24),
+        decoration: BoxDecoration(
-            if (_companyInfo?.taxDisplayMode == 'normal')
+          color: bgColor,
-              _buildSummaryRow("消費税 (${(currentTaxRate * 100).toInt()}%)", "￥${formatter.format(tax)}", Colors.white70),
+          borderRadius: BorderRadius.circular(12),
-            if (_companyInfo?.taxDisplayMode == 'text_only')
+          border: Border.all(color: borderColor),
-              _buildSummaryRow("消費税", "（税別）", Colors.white70),
+        ),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            _buildSummaryRow("小計", "￥${formatter.format(subtotal)}", labelColor),
+            if (currentTaxRate > 0) ...[
+              Divider(color: dividerColor),
+              if (_companyInfo?.taxDisplayMode == 'normal')
+                _buildSummaryRow("消費税 (${(currentTaxRate * 100).toInt()}%)", "￥${formatter.format(tax)}", labelColor),
+              if (_companyInfo?.taxDisplayMode == 'text_only')
+                _buildSummaryRow("消費税", "（税別）", labelColor),
+            ],
+            Divider(color: dividerColor),
+            _buildSummaryRow(
+              currentTaxRate > 0 ? "合計金額 (税込)" : "合計金額",
+              "￥${formatter.format(total)}",
+              totalColor,
+              isTotal: true,
+            ),
           ],
-          const Divider(color: Colors.white24),
+        ),
-          _buildSummaryRow(
-            currentTaxRate > 0 ? "合計金額 (税込)" : "合計金額",
-            "￥${formatter.format(total)}",
-            Colors.white,
-            isTotal: true,
-          ),
-        ],
       ),
     );
   }
@@ -721,7 +804,13 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
               mainAxisSize: MainAxisSize.min,
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
-                const Text("この下書き伝票を「確定」として正式に発行しますか？"),
+                Row(
+                  children: const [
+                    _DraftBadge(),
+                    SizedBox(width: 8),
+                    Expanded(child: Text("この伝票を「確定」として正式に発行しますか？")),
+                  ],
+                ),
                 const SizedBox(height: 8),
                 if (showWarning)
                   Container(
@@ -785,7 +874,15 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
         children: [
           const Icon(Icons.drafts, color: Colors.orange),
           const SizedBox(width: 12),
-          const Expanded(child: Text("下書き状態として保持", style: TextStyle(fontWeight: FontWeight.bold))),
+          const Expanded(
+            child: Row(
+              children: [
+                _DraftBadge(),
+                SizedBox(width: 8),
+                Text("状態として保持", style: TextStyle(fontWeight: FontWeight.bold)),
+              ],
+            ),
+          ),
           Switch(
             value: _currentInvoice.isDraft,
             onChanged: (val) {

lib/screens/invoice_history/invoice_history_item.dart

@@ -25,86 +25,171 @@ class InvoiceHistoryItem extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return ListTile(
+    final cardColor = invoice.isDraft ? Colors.orange.shade50 : Colors.white;
-      tileColor: invoice.isDraft ? Colors.orange.shade50 : null,
+    final iconBg = isUnlocked
-      leading: CircleAvatar(
+        ? _docTypeColor(invoice.documentType).withValues(alpha: 0.18)
-        backgroundColor: invoice.isDraft
+        : Colors.grey.shade200;
-            ? Colors.orange.shade100
+    final iconColor = isUnlocked ? _docTypeColor(invoice.documentType) : Colors.grey;
-            : (isUnlocked ? Colors.indigo.shade100 : Colors.grey.shade200),
+
-        child: Stack(
+    final hasSubject = invoice.subject?.isNotEmpty ?? false;
-          children: [
+    final firstItemDesc = invoice.items.isNotEmpty ? invoice.items.first.description : '';
-            Align(
+    final othersCount = invoice.items.length > 1 ? invoice.items.length - 1 : 0;
-              alignment: Alignment.center,
+    final subjectLine = hasSubject ? invoice.subject! : firstItemDesc;
-              child: Icon(
+    final subjectDisplay = hasSubject
-                invoice.isDraft ? Icons.edit_note : Icons.description_outlined,
+        ? subjectLine
-                color: invoice.isDraft
+        : (othersCount > 0 ? "$subjectLine 他$othersCount件" : subjectLine);
-                    ? Colors.orange
+    final customerName = invoice.customerNameForDisplay.endsWith('様')
-                    : (isUnlocked ? Colors.indigo : Colors.grey),
+        ? invoice.customerNameForDisplay
+        : '${invoice.customerNameForDisplay} 様';
+    final subjectColor = invoice.isLocked ? Colors.grey.shade500 : Colors.indigo.shade700;
+    final amountColor = invoice.isLocked ? Colors.grey.shade500 : Colors.black87;
+    final dateColor = Colors.black87;
+
+    return Card(
+      color: cardColor,
+      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+      elevation: invoice.isDraft ? 1.5 : 0.5,
+      margin: const EdgeInsets.symmetric(horizontal: 12, vertical: 3),
+      child: InkWell(
+        borderRadius: BorderRadius.circular(12),
+        onTap: onTap,
+        onLongPress: onLongPress,
+        child: Padding(
+          padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
+          child: Row(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              CircleAvatar(
+                backgroundColor: iconBg,
+                child: Stack(
+                  children: [
+                    Align(
+                      alignment: Alignment.center,
+                      child: Icon(
+                        _docTypeIcon(invoice.documentType),
+                        color: iconColor,
+                      ),
+                    ),
+                    if (invoice.isLocked)
+                      const Align(
+                        alignment: Alignment.bottomRight,
+                        child: Icon(Icons.lock, size: 14, color: Colors.redAccent),
+                      ),
+                  ],
+                ),
               ),
-            ),
+              const SizedBox(width: 12),
-            if (invoice.isLocked)
+              Expanded(
-              const Align(
+                child: Row(
-                alignment: Alignment.bottomRight,
+                  crossAxisAlignment: CrossAxisAlignment.start,
-                child: Icon(Icons.lock, size: 14, color: Colors.redAccent),
+                  children: [
+                    Expanded(
+                      child: Column(
+                        crossAxisAlignment: CrossAxisAlignment.start,
+                        children: [
+                          Text(
+                            customerName,
+                            style: TextStyle(
+                              fontSize: 16,
+                              fontWeight: FontWeight.w700,
+                              color: invoice.isLocked ? Colors.grey : Colors.black87,
+                            ),
+                            maxLines: 1,
+                            overflow: TextOverflow.ellipsis,
+                          ),
+                          const SizedBox(height: 3),
+                          Text(
+                            subjectDisplay,
+                            style: TextStyle(
+                              fontSize: 14,
+                              fontWeight: FontWeight.w600,
+                              color: subjectColor,
+                            ),
+                            maxLines: 1,
+                            overflow: TextOverflow.ellipsis,
+                          ),
+                        ],
+                      ),
+                    ),
+                    const SizedBox(width: 8),
+                    Column(
+                      crossAxisAlignment: CrossAxisAlignment.end,
+                      mainAxisSize: MainAxisSize.min,
+                      children: [
+                        Row(
+                          mainAxisSize: MainAxisSize.min,
+                          children: [
+                            if (invoice.isDraft)
+                              Container(
+                                padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 2),
+                                margin: const EdgeInsets.only(right: 6),
+                                decoration: BoxDecoration(
+                                  color: Colors.orange.shade100,
+                                  borderRadius: BorderRadius.circular(10),
+                                ),
+                                child: const Text(
+                                  '下書き',
+                                  style: TextStyle(fontSize: 11, fontWeight: FontWeight.w700, color: Colors.orange),
+                                ),
+                              ),
+                            Text(
+                              dateFormatter.format(invoice.date),
+                              style: TextStyle(fontSize: 12, color: dateColor),
+                            ),
+                          ],
+                        ),
+                        const SizedBox(height: 2),
+                        ConstrainedBox(
+                          constraints: const BoxConstraints(maxWidth: 140),
+                          child: Text(
+                            invoice.invoiceNumber,
+                            style: const TextStyle(fontSize: 10.5, color: Colors.grey),
+                            maxLines: 1,
+                            overflow: TextOverflow.ellipsis,
+                            textAlign: TextAlign.right,
+                          ),
+                        ),
+                        const SizedBox(height: 8),
+                        Text(
+                          "￥${amountFormatter.format(invoice.totalAmount)}",
+                          style: TextStyle(fontWeight: FontWeight.bold, fontSize: 13, color: amountColor),
+                          textAlign: TextAlign.right,
+                        ),
+                      ],
+                    ),
+                  ],
+                ),
               ),
-          ],
+            ],
-        ),
-      ),
-      title: Column(
-        crossAxisAlignment: CrossAxisAlignment.start,
-        children: [
-          Text(
-            invoice.customerNameForDisplay,
-            style: TextStyle(
-              fontWeight: FontWeight.bold,
-              color: invoice.isLocked ? Colors.grey : Colors.black87,
-            ),
           ),
-          if (invoice.subject?.isNotEmpty ?? false)
-            Text(
-              invoice.subject!,
-              style: TextStyle(
-                fontSize: 13,
-                color: Colors.indigo.shade700,
-                fontWeight: FontWeight.normal,
-              ),
-              maxLines: 1,
-              overflow: TextOverflow.ellipsis,
-            ),
-        ],
-      ),
-      subtitle: Text("${dateFormatter.format(invoice.date)} - ${invoice.invoiceNumber}"),
-      trailing: SizedBox(
-        height: 48,
-        child: Column(
-          mainAxisSize: MainAxisSize.min,
-          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
-          crossAxisAlignment: CrossAxisAlignment.end,
-          children: [
-            Text(
-              "￥${amountFormatter.format(invoice.totalAmount)}",
-              style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 13),
-            ),
-            if (invoice.isSynced)
-              const Icon(Icons.sync, size: 14, color: Colors.green)
-            else
-              const Icon(Icons.sync_disabled, size: 14, color: Colors.orange),
-            IconButton(
-              padding: EdgeInsets.zero,
-              constraints: const BoxConstraints.tightFor(width: 28, height: 24),
-              icon: const Icon(Icons.edit, size: 16),
-              tooltip: invoice.isLocked
-                  ? "ロック中"
-                  : (isUnlocked ? "編集" : "アンロックして編集"),
-              onPressed: (invoice.isLocked || !isUnlocked)
-                  ? null
-                  : onEdit,
-            ),
-          ],
         ),
       ),
-      onTap: onTap,
-      onLongPress: onLongPress,
     );
   }
+
+  IconData _docTypeIcon(DocumentType type) {
+    switch (type) {
+      case DocumentType.estimation:
+        return Icons.request_quote;
+      case DocumentType.delivery:
+        return Icons.local_shipping;
+      case DocumentType.invoice:
+        return Icons.receipt_long;
+      case DocumentType.receipt:
+        return Icons.task_alt;
+    }
+  }
+
+  Color _docTypeColor(DocumentType type) {
+    switch (type) {
+      case DocumentType.estimation:
+        return Colors.blue;
+      case DocumentType.delivery:
+        return Colors.teal;
+      case DocumentType.invoice:
+        return Colors.indigo;
+      case DocumentType.receipt:
+        return Colors.green;
+    }
+  }
 }

lib/screens/invoice_history/invoice_history_list.dart

@@ -41,7 +41,7 @@ class InvoiceHistoryList extends StatelessWidget {
 
     return ListView.builder(
       keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
-      padding: const EdgeInsets.only(bottom: 120), // FAB分の固定余白
+      padding: const EdgeInsets.fromLTRB(12, 0, 12, 120), // 横揃えとFAB余白
       itemCount: invoices.length,
       itemBuilder: (context, index) {
         final invoice = invoices[index];

lib/screens/invoice_history_screen.dart

@@ -10,6 +10,8 @@ import 'customer_master_screen.dart';
 import 'invoice_input_screen.dart';
 import 'settings_screen.dart';
 import 'company_info_screen.dart';
+import 'dashboard_screen.dart';
+import '../services/app_settings_repository.dart';
 import '../widgets/slide_to_unlock.dart';
 // InvoiceFlowScreen import removed; using inline type picker
 import 'package:package_info_plus/package_info_plus.dart';
@@ -17,7 +19,8 @@ import '../widgets/invoice_pdf_preview_page.dart';
 import 'invoice_history/invoice_history_list.dart';
 
 class InvoiceHistoryScreen extends StatefulWidget {
-  const InvoiceHistoryScreen({super.key});
+  final bool initialUnlocked;
+  const InvoiceHistoryScreen({super.key, this.initialUnlocked = false});
 
   @override
   State<InvoiceHistoryScreen> createState() => _InvoiceHistoryScreenState();
@@ -26,6 +29,7 @@ class InvoiceHistoryScreen extends StatefulWidget {
 class _InvoiceHistoryScreenState extends State<InvoiceHistoryScreen> {
   final InvoiceRepository _invoiceRepo = InvoiceRepository();
   final CustomerRepository _customerRepo = CustomerRepository();
+  final AppSettingsRepository _settingsRepo = AppSettingsRepository();
   List<Invoice> _invoices = [];
   List<Invoice> _filteredInvoices = [];
   bool _isLoading = true;
@@ -35,12 +39,26 @@ class _InvoiceHistoryScreenState extends State<InvoiceHistoryScreen> {
   DateTime? _startDate;
   DateTime? _endDate;
   String _appVersion = "1.0.0";
+  bool _useDashboardHome = false;
 
   @override
   void initState() {
     super.initState();
+    _isUnlocked = widget.initialUnlocked;
     _loadData();
     _loadVersion();
+    _loadHomeMode();
+  }
+
+  Future<void> _loadHomeMode() async {
+    final mode = await _settingsRepo.getHomeMode();
+    if (!mounted) return;
+    setState(() {
+      _useDashboardHome = mode == 'dashboard';
+      if (_useDashboardHome && widget.initialUnlocked) {
+        _isUnlocked = true;
+      }
+    });
   }
 
   Future<void> _showInvoiceActions(Invoice invoice) async {
@@ -198,20 +216,20 @@ class _InvoiceHistoryScreenState extends State<InvoiceHistoryScreen> {
     final dateFormatter = DateFormat('yyyy/MM/dd');
     return Scaffold(
       resizeToAvoidBottomInset: false,
-      drawer: _isUnlocked
+      drawer: (_useDashboardHome || !_isUnlocked)
-          ? Drawer(
+          ? null
+          : Drawer(
               child: ListView(
                 padding: EdgeInsets.zero,
                 children: [
                   DrawerHeader(
-                    decoration: BoxDecoration(color: Colors.indigo.shade700),
+                    decoration: const BoxDecoration(color: Colors.indigo),
                     child: Column(
                       crossAxisAlignment: CrossAxisAlignment.start,
-                      mainAxisAlignment: MainAxisAlignment.end,
+                      children: const [
-                      children: [
+                        Text("販売アシスト1号", style: TextStyle(color: Colors.white, fontSize: 20)),
-                        const Text("メニュー", style: TextStyle(color: Colors.white, fontSize: 20, fontWeight: FontWeight.bold)),
+                        SizedBox(height: 8),
-                        const SizedBox(height: 8),
+                        Text("メニュー", style: TextStyle(color: Colors.white70)),
-                        Text("v$_appVersion", style: const TextStyle(color: Colors.white70)),
                       ],
                     ),
                   ),
@@ -257,10 +275,27 @@ class _InvoiceHistoryScreenState extends State<InvoiceHistoryScreen> {
                   ),
                 ],
               ),
-            )
+            ),
-          : null,
       appBar: AppBar(
-        // leading removed
+        automaticallyImplyLeading: false,
+        leading: _useDashboardHome
+            ? IconButton(
+                icon: const Icon(Icons.arrow_back),
+                onPressed: () {
+                  Navigator.pushReplacement(
+                    context,
+                    MaterialPageRoute(builder: (_) => const DashboardScreen()),
+                  );
+                },
+              )
+            : (_isUnlocked
+                ? Builder(
+                    builder: (ctx) => IconButton(
+                      icon: const Icon(Icons.menu),
+                      onPressed: () => Scaffold.of(ctx).openDrawer(),
+                    ),
+                  )
+                : null),
         title: GestureDetector(
           onLongPress: () {
             Navigator.push(
@@ -307,19 +342,41 @@ class _InvoiceHistoryScreenState extends State<InvoiceHistoryScreen> {
           preferredSize: const Size.fromHeight(60),
           child: Padding(
             padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 8.0),
-            child: TextField(
+            child: Container(
-              decoration: InputDecoration(
+              decoration: BoxDecoration(
-                hintText: "検索 (顧客名、伝票番号...)",
+                color: Colors.grey.shade50,
-                prefixIcon: const Icon(Icons.search),
+                borderRadius: BorderRadius.circular(16),
-                filled: true,
+                boxShadow: [
-                fillColor: Colors.white,
+                  // outer shadow
-                border: OutlineInputBorder(borderRadius: BorderRadius.circular(12), borderSide: BorderSide.none),
+                  BoxShadow(
-                isDense: true,
+                    color: Colors.black.withValues(alpha: 0.08),
+                    blurRadius: 12,
+                    offset: const Offset(0, 4),
+                  ),
+                  // faux inset highlight
+                  BoxShadow(
+                    color: Colors.white.withValues(alpha: 0.9),
+                    blurRadius: 4,
+                    spreadRadius: -4,
+                    offset: const Offset(-1, -1),
+                  ),
+                ],
+              ),
+              child: TextField(
+                decoration: InputDecoration(
+                  hintText: "検索 (顧客名、伝票番号...)",
+                  prefixIcon: const Icon(Icons.search),
+                  filled: true,
+                  fillColor: Colors.grey.shade50,
+                  border: OutlineInputBorder(borderRadius: BorderRadius.circular(16), borderSide: BorderSide.none),
+                  isDense: true,
+                  contentPadding: const EdgeInsets.symmetric(vertical: 10),
+                ),
+                onChanged: (val) {
+                  _searchQuery = val;
+                  _applyFilterAndSort();
+                },
               ),
-              onChanged: (val) {
-                _searchQuery = val;
-                _applyFilterAndSort();
-              },
             ),
           ),
         ),
@@ -327,14 +384,15 @@ class _InvoiceHistoryScreenState extends State<InvoiceHistoryScreen> {
       body: SafeArea(
         child: Column(
           children: [
-            Padding(
+            if (!_useDashboardHome)
-              padding: const EdgeInsets.all(16.0),
+              Padding(
-              child: SlideToUnlock(
+                padding: const EdgeInsets.all(16.0),
-                isLocked: !_isUnlocked,
+                child: SlideToUnlock(
-                onUnlocked: _toggleUnlock,
+                  isLocked: !_isUnlocked,
-                text: "スライドでロック解除",
+                  onUnlocked: _toggleUnlock,
+                  text: "スライドでロック解除",
+                ),
               ),
-            ),
             Expanded(
               child: _isLoading
                   ? const Center(child: CircularProgressIndicator())
@@ -347,8 +405,9 @@ class _InvoiceHistoryScreenState extends State<InvoiceHistoryScreen> {
                         await Navigator.push(
                           context,
                           MaterialPageRoute(
-                            builder: (context) => InvoiceDetailPage(
+                            builder: (context) => InvoiceInputForm(
-                              invoice: invoice,
+                              existingInvoice: invoice,
+                              onInvoiceGenerated: (inv, path) {},
                             ),
                           ),
                         );
@@ -393,23 +452,23 @@ class _InvoiceHistoryScreenState extends State<InvoiceHistoryScreen> {
           mainAxisSize: MainAxisSize.min,
           children: [
             ListTile(
-              leading: const Icon(Icons.insert_drive_file_outlined),
+              leading: CircleAvatar(backgroundColor: Colors.blue.withValues(alpha: 0.12), child: const Icon(Icons.request_quote, color: Colors.blue)),
-              title: const Text('下書き: 見積書', style: TextStyle(fontSize: 24)),
+              title: const Text('見積書', style: TextStyle(fontSize: 20, fontWeight: FontWeight.w700)),
               onTap: () => _startNew(DocumentType.estimation),
             ),
             ListTile(
-              leading: const Icon(Icons.local_shipping_outlined),
+              leading: CircleAvatar(backgroundColor: Colors.teal.withValues(alpha: 0.12), child: const Icon(Icons.local_shipping, color: Colors.teal)),
-              title: const Text('下書き: 納品書', style: TextStyle(fontSize: 24)),
+              title: const Text('納品書', style: TextStyle(fontSize: 20, fontWeight: FontWeight.w700)),
               onTap: () => _startNew(DocumentType.delivery),
             ),
             ListTile(
-              leading: const Icon(Icons.request_quote_outlined),
+              leading: CircleAvatar(backgroundColor: Colors.indigo.withValues(alpha: 0.12), child: const Icon(Icons.receipt_long, color: Colors.indigo)),
-              title: const Text('下書き: 請求書', style: TextStyle(fontSize: 24)),
+              title: const Text('請求書', style: TextStyle(fontSize: 20, fontWeight: FontWeight.w700)),
               onTap: () => _startNew(DocumentType.invoice),
             ),
             ListTile(
-              leading: const Icon(Icons.receipt_long_outlined),
+              leading: CircleAvatar(backgroundColor: Colors.green.withValues(alpha: 0.12), child: const Icon(Icons.task_alt, color: Colors.green)),
-              title: const Text('下書き: 領収書', style: TextStyle(fontSize: 24)),
+              title: const Text('領収書', style: TextStyle(fontSize: 20, fontWeight: FontWeight.w700)),
               onTap: () => _startNew(DocumentType.receipt),
             ),
           ],
@@ -426,6 +485,8 @@ class _InvoiceHistoryScreenState extends State<InvoiceHistoryScreen> {
         builder: (_) => InvoiceInputForm(
           onInvoiceGenerated: (inv, path) {},
           initialDocumentType: type,
+          startViewMode: false,
+          showNewBadge: true,
         ),
       ),
     );

lib/screens/master_hub_page.dart

@@ -0,0 +1,80 @@
+import 'package:flutter/material.dart';
+import 'customer_master_screen.dart';
+import 'product_master_screen.dart';
+import 'settings_screen.dart';
+
+class MasterHubPage extends StatelessWidget {
+  const MasterHubPage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final items = <MasterEntry>[
+      MasterEntry(
+        title: '顧客マスター',
+        description: '顧客情報の管理・編集',
+        icon: Icons.people,
+        builder: (_) => const CustomerMasterScreen(),
+      ),
+      MasterEntry(
+        title: '商品マスター',
+        description: '商品情報の管理・編集',
+        icon: Icons.inventory_2,
+        builder: (_) => const ProductMasterScreen(),
+      ),
+      MasterEntry(
+        title: '設定',
+        description: 'アプリ設定・メニュー管理',
+        icon: Icons.settings,
+        builder: (_) => const SettingsScreen(),
+      ),
+    ];
+
+    return Scaffold(
+      appBar: AppBar(
+        title: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: const [
+            Text('マスター管理'),
+            Text('ScreenID: 03', style: TextStyle(fontSize: 11, color: Colors.white70)),
+          ],
+        ),
+      ),
+      body: ListView.separated(
+        padding: const EdgeInsets.all(16),
+        itemBuilder: (context, index) {
+          final item = items[index];
+          return Card(
+            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+            elevation: 1,
+            child: ListTile(
+              leading: CircleAvatar(
+                backgroundColor: Colors.indigo.shade50,
+                foregroundColor: Colors.indigo.shade700,
+                child: Icon(item.icon),
+              ),
+              title: Text(item.title, style: const TextStyle(fontWeight: FontWeight.bold)),
+              subtitle: Text(item.description),
+              trailing: const Icon(Icons.chevron_right),
+              onTap: () => Navigator.push(context, MaterialPageRoute(builder: item.builder)),
+            ),
+          );
+        },
+        separatorBuilder: (context, _) => const SizedBox(height: 12),
+        itemCount: items.length,
+      ),
+    );
+  }
+}
+
+class MasterEntry {
+  final String title;
+  final String description;
+  final IconData icon;
+  final WidgetBuilder builder;
+  const MasterEntry({
+    required this.title,
+    required this.description,
+    required this.icon,
+    required this.builder,
+  });
+}

lib/screens/product_master_screen.dart

@@ -6,8 +6,9 @@ import 'barcode_scanner_screen.dart';
 
 class ProductMasterScreen extends StatefulWidget {
   final bool selectionMode;
+  final bool showHidden;
 
-  const ProductMasterScreen({super.key, this.selectionMode = false});
+  const ProductMasterScreen({super.key, this.selectionMode = false, this.showHidden = false});
 
   @override
   State<ProductMasterScreen> createState() => _ProductMasterScreenState();
@@ -30,7 +31,7 @@ class _ProductMasterScreenState extends State<ProductMasterScreen> {
 
   Future<void> _loadProducts() async {
     setState(() => _isLoading = true);
-    final products = await _productRepo.getAllProducts();
+    final products = await _productRepo.getAllProducts(includeHidden: widget.showHidden);
     if (!mounted) return;
     setState(() {
       _products = products;
@@ -47,6 +48,12 @@ class _ProductMasterScreenState extends State<ProductMasterScreen> {
                (p.barcode?.toLowerCase().contains(query) ?? false) ||
                (p.category?.toLowerCase().contains(query) ?? false);
       }).toList();
+      if (!widget.showHidden) {
+        _filteredProducts = _filteredProducts.where((p) => !p.isHidden).toList();
+      }
+      if (widget.showHidden) {
+        _filteredProducts.sort((a, b) => b.id.compareTo(a.id));
+      }
     });
   }
 
@@ -106,16 +113,19 @@ class _ProductMasterScreenState extends State<ProductMasterScreen> {
                 ElevatedButton(
                   onPressed: () {
                     if (nameController.text.isEmpty) return;
+                    final locked = product?.isLocked ?? false;
+                    final newId = locked ? const Uuid().v4() : (product?.id ?? const Uuid().v4());
                     Navigator.pop(
                       context,
                       Product(
-                        id: product?.id ?? const Uuid().v4(),
+                        id: newId,
                         name: nameController.text.trim(),
                         defaultUnitPrice: int.tryParse(priceController.text) ?? 0,
                         barcode: barcodeController.text.isEmpty ? null : barcodeController.text.trim(),
                         category: categoryController.text.isEmpty ? null : categoryController.text.trim(),
                         stockQuantity: int.tryParse(stockController.text) ?? 0,
                         odooId: product?.odooId,
+                        isLocked: false,
                       ),
                     );
                   },
@@ -188,10 +198,19 @@ class _ProductMasterScreenState extends State<ProductMasterScreen> {
                             ],
                           ),
                         ),
-                        title: Text(p.name, style: TextStyle(fontWeight: FontWeight.bold, color: p.isLocked ? Colors.grey : Colors.black87)),
+                        title: Text(
+                          p.name + (p.isHidden ? " (非表示)" : ""),
+                          style: TextStyle(
+                            fontWeight: FontWeight.bold,
+                            color: p.isHidden
+                                ? Colors.grey
+                                : (p.isLocked ? Colors.grey : Colors.black87),
+                          ),
+                        ),
                         subtitle: Text("${p.category ?? '未分類'} - ￥${p.defaultUnitPrice} (在庫: ${p.stockQuantity})"),
                         onTap: () {
                           if (widget.selectionMode) {
+                            if (p.isHidden) return; // safety: do not return hidden in selection
                             Navigator.pop(context, p);
                           } else {
                             _showDetailPane(p);
@@ -212,6 +231,16 @@ class _ProductMasterScreenState extends State<ProductMasterScreen> {
                                       _showEditDialog(product: p);
                                     },
                                   ),
+                                  if (!p.isHidden)
+                                    ListTile(
+                                      leading: const Icon(Icons.visibility_off),
+                                      title: const Text("非表示にする"),
+                                      onTap: () async {
+                                        Navigator.pop(ctx);
+                                        await _productRepo.setHidden(p.id, true);
+                                        if (mounted) _loadProducts();
+                                      },
+                                    ),
                                   if (!p.isLocked)
                                     ListTile(
                                       leading: const Icon(Icons.delete_outline, color: Colors.redAccent),

lib/screens/settings_screen.dart

@@ -1,7 +1,12 @@
+import 'dart:io';
 import 'package:flutter/material.dart';
 import 'dart:convert';
-import 'package:shared_preferences/shared_preferences.dart';
+import 'package:image_picker/image_picker.dart';
+import '../services/app_settings_repository.dart';
+import '../services/theme_controller.dart';
 import 'company_info_screen.dart';
+import 'email_settings_screen.dart';
+import 'business_profile_screen.dart';
 
 class SettingsScreen extends StatefulWidget {
   const SettingsScreen({super.key});
@@ -10,28 +15,22 @@ class SettingsScreen extends StatefulWidget {
   State<SettingsScreen> createState() => _SettingsScreenState();
 }
 
+// シンプルなアイコンマップ（拡張可）
+const Map<String, IconData> kIconsMap = {
+  'list_alt': Icons.list_alt,
+  'edit_note': Icons.edit_note,
+  'history': Icons.history,
+  'settings': Icons.settings,
+  'invoice': Icons.receipt_long,
+  'dashboard': Icons.dashboard,
+  'home': Icons.home,
+  'info': Icons.info,
+  'mail': Icons.mail,
+  'shopping_cart': Icons.shopping_cart,
+};
+
 class _SettingsScreenState extends State<SettingsScreen> {
-  // Company
+  final _appSettingsRepo = AppSettingsRepository();
-  final _companyNameCtrl = TextEditingController();
-  final _companyZipCtrl = TextEditingController();
-  final _companyAddrCtrl = TextEditingController();
-  final _companyTelCtrl = TextEditingController();
-  final _companyRegCtrl = TextEditingController();
-  final _companyFaxCtrl = TextEditingController();
-  final _companyEmailCtrl = TextEditingController();
-  final _companyUrlCtrl = TextEditingController();
-
-  // Staff
-  final _staffNameCtrl = TextEditingController();
-  final _staffMailCtrl = TextEditingController();
-
-  // SMTP
-  final _smtpHostCtrl = TextEditingController();
-  final _smtpPortCtrl = TextEditingController(text: '587');
-  final _smtpUserCtrl = TextEditingController();
-  final _smtpPassCtrl = TextEditingController();
-  final _smtpBccCtrl = TextEditingController();
-  bool _smtpTls = true;
 
   // External sync (母艦システム「お局様」連携)
   final _externalHostCtrl = TextEditingController();
@@ -47,85 +46,55 @@ class _SettingsScreenState extends State<SettingsScreen> {
   final _kanaKeyCtrl = TextEditingController();
   final _kanaValCtrl = TextEditingController();
 
-  // SharedPreferences keys
+  // Dashboard / Home
-  static const _kCompanyName = 'company_name';
+  bool _homeDashboard = false;
-  static const _kCompanyZip = 'company_zip';
+  bool _statusEnabled = true;
-  static const _kCompanyAddr = 'company_addr';
+  final _statusTextCtrl = TextEditingController(text: '工事中');
-  static const _kCompanyTel = 'company_tel';
+  List<DashboardMenuItem> _menuItems = [];
-  static const _kCompanyReg = 'company_reg';
+  bool _loadingAppSettings = true;
-  static const _kCompanyFax = 'company_fax';
-  static const _kCompanyEmail = 'company_email';
-  static const _kCompanyUrl = 'company_url';
-
-  static const _kStaffName = 'staff_name';
-  static const _kStaffMail = 'staff_mail';
-
-  static const _kSmtpHost = 'smtp_host';
-  static const _kSmtpPort = 'smtp_port';
-  static const _kSmtpUser = 'smtp_user';
-  static const _kSmtpPass = 'smtp_pass';
-  static const _kSmtpTls = 'smtp_tls';
-  static const _kSmtpBcc = 'smtp_bcc';
 
   static const _kExternalHost = 'external_host';
   static const _kExternalPass = 'external_pass';
 
-  static const _kCryptKey = 'test';
-
   static const _kBackupPath = 'backup_path';
 
   @override
   void dispose() {
-    _companyNameCtrl.dispose();
-    _companyZipCtrl.dispose();
-    _companyAddrCtrl.dispose();
-    _companyTelCtrl.dispose();
-    _companyRegCtrl.dispose();
-    _companyFaxCtrl.dispose();
-    _companyEmailCtrl.dispose();
-    _companyUrlCtrl.dispose();
-    _staffNameCtrl.dispose();
-    _staffMailCtrl.dispose();
-    _smtpHostCtrl.dispose();
-    _smtpPortCtrl.dispose();
-    _smtpUserCtrl.dispose();
-    _smtpPassCtrl.dispose();
-    _smtpBccCtrl.dispose();
     _externalHostCtrl.dispose();
     _externalPassCtrl.dispose();
     _backupPathCtrl.dispose();
     _kanaKeyCtrl.dispose();
     _kanaValCtrl.dispose();
+    _statusTextCtrl.dispose();
     super.dispose();
   }
 
   Future<void> _loadAll() async {
     await _loadKanaMap();
-    final prefs = await SharedPreferences.getInstance();
+    final externalHost = await _appSettingsRepo.getString(_kExternalHost) ?? '';
+    final externalPass = await _appSettingsRepo.getString(_kExternalPass) ?? '';
+
+    final backupPath = await _appSettingsRepo.getString(_kBackupPath) ?? '';
+    final theme = await _appSettingsRepo.getTheme();
+
     setState(() {
-      _companyNameCtrl.text = prefs.getString(_kCompanyName) ?? '';
+      _externalHostCtrl.text = externalHost;
-      _companyZipCtrl.text = prefs.getString(_kCompanyZip) ?? '';
+      _externalPassCtrl.text = externalPass;
-      _companyAddrCtrl.text = prefs.getString(_kCompanyAddr) ?? '';
-      _companyTelCtrl.text = prefs.getString(_kCompanyTel) ?? '';
-      _companyRegCtrl.text = prefs.getString(_kCompanyReg) ?? '';
-      _companyFaxCtrl.text = prefs.getString(_kCompanyFax) ?? '';
-      _companyEmailCtrl.text = prefs.getString(_kCompanyEmail) ?? '';
-      _companyUrlCtrl.text = prefs.getString(_kCompanyUrl) ?? '';
 
-      _staffNameCtrl.text = prefs.getString(_kStaffName) ?? '';
+      _backupPathCtrl.text = backupPath;
-      _staffMailCtrl.text = prefs.getString(_kStaffMail) ?? '';
+      _theme = theme;
+    });
 
-      _smtpHostCtrl.text = prefs.getString(_kSmtpHost) ?? '';
+    final homeMode = await _appSettingsRepo.getHomeMode();
-      _smtpPortCtrl.text = prefs.getString(_kSmtpPort) ?? '587';
+    final statusEnabled = await _appSettingsRepo.getDashboardStatusEnabled();
-      _smtpUserCtrl.text = prefs.getString(_kSmtpUser) ?? '';
+    final statusText = await _appSettingsRepo.getDashboardStatusText();
-      _smtpPassCtrl.text = _decryptWithFallback(prefs.getString(_kSmtpPass) ?? '');
+    final menu = await _appSettingsRepo.getDashboardMenu();
-      _smtpTls = prefs.getBool(_kSmtpTls) ?? true;
+    setState(() {
-      _smtpBccCtrl.text = prefs.getString(_kSmtpBcc) ?? '';
+      _homeDashboard = homeMode == 'dashboard';
-
+      _statusEnabled = statusEnabled;
-      _externalHostCtrl.text = prefs.getString(_kExternalHost) ?? '';
+      _statusTextCtrl.text = statusText;
-      _externalPassCtrl.text = prefs.getString(_kExternalPass) ?? '';
+      _menuItems = menu;
-
+      _loadingAppSettings = false;
-      _backupPathCtrl.text = prefs.getString(_kBackupPath) ?? '';
     });
   }
 
@@ -139,55 +108,156 @@ class _SettingsScreenState extends State<SettingsScreen> {
     ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(msg)));
   }
 
-  Future<void> _saveCompany() async {
+  Future<void> _saveAppSettings() async {
-    final prefs = await SharedPreferences.getInstance();
+    await _appSettingsRepo.setHomeMode(_homeDashboard ? 'dashboard' : 'invoice_history');
-    await prefs.setString(_kCompanyName, _companyNameCtrl.text);
+    await _appSettingsRepo.setDashboardStatusEnabled(_statusEnabled);
-    await prefs.setString(_kCompanyZip, _companyZipCtrl.text);
+    await _appSettingsRepo.setDashboardStatusText(_statusTextCtrl.text.trim().isEmpty ? '工事中' : _statusTextCtrl.text.trim());
-    await prefs.setString(_kCompanyAddr, _companyAddrCtrl.text);
+    await _appSettingsRepo.setDashboardMenu(_menuItems);
-    await prefs.setString(_kCompanyTel, _companyTelCtrl.text);
+    _showSnackbar('ホーム/ダッシュボード設定を保存しました');
-    await prefs.setString(_kCompanyReg, _companyRegCtrl.text);
-    await prefs.setString(_kCompanyFax, _companyFaxCtrl.text);
-    await prefs.setString(_kCompanyEmail, _companyEmailCtrl.text);
-    await prefs.setString(_kCompanyUrl, _companyUrlCtrl.text);
-    _showSnackbar('自社情報を保存しました');
   }
 
-  Future<void> _saveStaff() async {
+  Future<void> _persistMenu() async {
-    final prefs = await SharedPreferences.getInstance();
+    await _appSettingsRepo.setDashboardMenu(_menuItems);
-    await prefs.setString(_kStaffName, _staffNameCtrl.text);
-    await prefs.setString(_kStaffMail, _staffMailCtrl.text);
-    _showSnackbar('担当者情報を保存しました');
   }
 
-  Future<void> _saveSmtp() async {
+  void _addMenuItem() async {
-    final prefs = await SharedPreferences.getInstance();
+    final titleCtrl = TextEditingController();
-    await prefs.setString(_kSmtpHost, _smtpHostCtrl.text);
+    String route = 'invoice_history';
-    await prefs.setString(_kSmtpPort, _smtpPortCtrl.text);
+    final iconCtrl = TextEditingController(text: 'list_alt');
-    await prefs.setString(_kSmtpUser, _smtpUserCtrl.text);
+    String? customIconPath;
-    await prefs.setString(_kSmtpPass, _encrypt(_smtpPassCtrl.text));
+    await showDialog(
-    await prefs.setBool(_kSmtpTls, _smtpTls);
+      context: context,
-    await prefs.setString(_kSmtpBcc, _smtpBccCtrl.text);
+      builder: (ctx) => AlertDialog(
-    _showSnackbar('SMTP設定を保存しました');
+        title: const Text('メニューを追加'),
+        content: SingleChildScrollView(
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              TextField(controller: titleCtrl, decoration: const InputDecoration(labelText: 'タイトル')),
+              DropdownButtonFormField<String>(
+                initialValue: route,
+                decoration: const InputDecoration(labelText: '遷移先'),
+                items: const [
+                  DropdownMenuItem(value: 'invoice_history', child: Text('A2:伝票一覧')),
+                  DropdownMenuItem(value: 'invoice_input', child: Text('A1:伝票入力')),
+                  DropdownMenuItem(value: 'customer_master', child: Text('C1:顧客マスター')),
+                  DropdownMenuItem(value: 'product_master', child: Text('P1:商品マスター')),
+                  DropdownMenuItem(value: 'master_hub', child: Text('M1:マスター管理')),
+                  DropdownMenuItem(value: 'settings', child: Text('S1:設定')),
+                ],
+                onChanged: (v) => route = v ?? 'invoice_history',
+              ),
+              TextField(controller: iconCtrl, decoration: const InputDecoration(labelText: 'Materialアイコン名 (例: list_alt)')),
+              const SizedBox(height: 8),
+              Row(
+                children: [
+                  Expanded(child: Text(customIconPath ?? 'カスタムアイコン: 未選択', style: const TextStyle(fontSize: 12))),
+                  IconButton(
+                    icon: const Icon(Icons.image_search),
+                    tooltip: 'ギャラリーから選択',
+                    onPressed: () async {
+                      final picker = ImagePicker();
+                      final picked = await picker.pickImage(source: ImageSource.gallery);
+                      if (picked != null) {
+                        setState(() {
+                          customIconPath = picked.path;
+                        });
+                      }
+                    },
+                  ),
+                ],
+              ),
+            ],
+          ),
+        ),
+        actions: [
+          TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('キャンセル')),
+          ElevatedButton(
+            onPressed: () {
+              if (titleCtrl.text.trim().isEmpty) return;
+              setState(() {
+                _menuItems = [
+                  ..._menuItems,
+                  DashboardMenuItem(
+                    id: DateTime.now().millisecondsSinceEpoch.toString(),
+                    title: titleCtrl.text.trim(),
+                    route: route,
+                    iconName: iconCtrl.text.trim().isEmpty ? 'list_alt' : iconCtrl.text.trim(),
+                    customIconPath: customIconPath,
+                  ),
+                ];
+              });
+              _persistMenu();
+              Navigator.pop(ctx);
+            },
+            child: const Text('追加'),
+          ),
+        ],
+      ),
+    );
+  }
+
+  void _removeMenuItem(String id) {
+    setState(() {
+      _menuItems = _menuItems.where((e) => e.id != id).toList();
+    });
+    _persistMenu();
+  }
+
+  void _reorderMenu(int oldIndex, int newIndex) {
+    setState(() {
+      if (newIndex > oldIndex) newIndex -= 1;
+      final item = _menuItems.removeAt(oldIndex);
+      _menuItems.insert(newIndex, item);
+    });
+    _persistMenu();
+  }
+
+  String _routeLabel(String route) {
+    switch (route) {
+      case 'invoice_history':
+        return 'A2:伝票一覧';
+      case 'invoice_input':
+        return 'A1:伝票入力';
+      case 'customer_master':
+        return 'C1:顧客マスター';
+      case 'product_master':
+        return 'P1:商品マスター';
+      case 'master_hub':
+        return 'M1:マスター管理';
+      case 'settings':
+        return 'S1:設定';
+      default:
+        return route;
+    }
+  }
+
+  IconData _iconForName(String name) {
+    return kIconsMap[name] ?? Icons.apps;
+  }
+
+  Widget _menuLeading(DashboardMenuItem item) {
+    if (item.customIconPath != null && File(item.customIconPath!).existsSync()) {
+      return CircleAvatar(backgroundImage: FileImage(File(item.customIconPath!)));
+    }
+    return Icon(item.iconName != null ? _iconForName(item.iconName!) : Icons.apps);
   }
 
   Future<void> _saveExternalSync() async {
-    final prefs = await SharedPreferences.getInstance();
+    await _appSettingsRepo.setString(_kExternalHost, _externalHostCtrl.text);
-    await prefs.setString(_kExternalHost, _externalHostCtrl.text);
+    await _appSettingsRepo.setString(_kExternalPass, _externalPassCtrl.text);
-    await prefs.setString(_kExternalPass, _externalPassCtrl.text);
     _showSnackbar('外部同期設定を保存しました');
   }
 
   Future<void> _saveBackup() async {
-    final prefs = await SharedPreferences.getInstance();
+    await _appSettingsRepo.setString(_kBackupPath, _backupPathCtrl.text);
-    await prefs.setString(_kBackupPath, _backupPathCtrl.text);
     _showSnackbar('バックアップ設定を保存しました');
   }
 
   void _pickBackupPath() => _showSnackbar('バックアップ先の選択は後で実装');
 
   Future<void> _loadKanaMap() async {
-    final prefs = await SharedPreferences.getInstance();
+    final json = await _appSettingsRepo.getString('customKanaMap');
-    final json = prefs.getString('customKanaMap');
     if (json != null && json.isNotEmpty) {
       try {
         final Map<String, dynamic> decoded = jsonDecode(json);
@@ -199,31 +269,10 @@ class _SettingsScreenState extends State<SettingsScreen> {
   }
 
   Future<void> _saveKanaMap() async {
-    final prefs = await SharedPreferences.getInstance();
+    await _appSettingsRepo.setString('customKanaMap', jsonEncode(_customKanaMap));
-    await prefs.setString('customKanaMap', jsonEncode(_customKanaMap));
     _showSnackbar('かなインデックスを保存しました');
   }
 
-  String _encrypt(String plain) {
-    if (plain.isEmpty) return '';
-    final pb = utf8.encode(plain);
-    final kb = utf8.encode(_kCryptKey);
-    final ob = List<int>.generate(pb.length, (i) => pb[i] ^ kb[i % kb.length]);
-    return base64Encode(ob);
-  }
-
-  String _decryptWithFallback(String cipher) {
-    if (cipher.isEmpty) return '';
-    try {
-      final ob = base64Decode(cipher);
-      final kb = utf8.encode(_kCryptKey);
-      final pb = List<int>.generate(ob.length, (i) => ob[i] ^ kb[i % kb.length]);
-      return utf8.decode(pb);
-    } catch (_) {
-      return cipher; // 旧プレーンテキストも許容
-    }
-  }
-
   @override
   Widget build(BuildContext context) {
     final bottomInset = MediaQuery.of(context).viewInsets.bottom;
@@ -247,33 +296,68 @@ class _SettingsScreenState extends State<SettingsScreen> {
           physics: const AlwaysScrollableScrollPhysics(),
           padding: EdgeInsets.only(bottom: listBottomPadding),
           children: [
-            Container(
+            _section(
-              width: double.infinity,
+              title: 'ホームモード / ダッシュボード',
-              padding: const EdgeInsets.all(14),
+              subtitle: 'ダッシュボードをホームにする・ステータス表示・メニュー管理 (設定はDB保存)',
-              margin: const EdgeInsets.only(bottom: 16),
+              child: Column(
-              decoration: BoxDecoration(
+                crossAxisAlignment: CrossAxisAlignment.start,
-                color: Colors.indigo.shade50,
-                borderRadius: BorderRadius.circular(12),
-                border: Border.all(color: Colors.indigo.shade100),
-              ),
-              child: Row(
                 children: [
-                  const Icon(Icons.business, color: Colors.indigo, size: 28),
+                  SwitchListTile(
-                  const SizedBox(width: 12),
+                    title: const Text('ホームをダッシュボードにする'),
-                  const Expanded(
+                    value: _homeDashboard,
-                    child: Text(
+                    onChanged: _loadingAppSettings ? null : (v) => setState(() => _homeDashboard = v),
-                      "自社情報を開く",
-                      style: TextStyle(fontWeight: FontWeight.bold, color: Colors.indigo),
-                    ),
                   ),
-                  ElevatedButton.icon(
+                  SwitchListTile(
-                    onPressed: () => Navigator.push(context, MaterialPageRoute(builder: (_) => const CompanyInfoScreen())),
+                    title: const Text('ステータスを表示する'),
-                    icon: const Icon(Icons.chevron_right),
+                    value: _statusEnabled,
-                    label: const Text("詳細"),
+                    onChanged: _loadingAppSettings ? null : (v) => setState(() => _statusEnabled = v),
-                    style: ElevatedButton.styleFrom(
+                  ),
-                      backgroundColor: Colors.indigo,
+                  TextField(
-                      foregroundColor: Colors.white,
+                    controller: _statusTextCtrl,
-                      padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
+                    enabled: !_loadingAppSettings && _statusEnabled,
+                    decoration: const InputDecoration(labelText: 'ステータス文言', hintText: '例: 工事中'),
+                  ),
+                  const SizedBox(height: 8),
+                  Row(
+                    children: [
+                      ElevatedButton.icon(
+                        icon: const Icon(Icons.add),
+                        label: const Text('メニューを追加'),
+                        onPressed: _loadingAppSettings ? null : _addMenuItem,
+                      ),
+                      const SizedBox(width: 12),
+                      Text('ドラッグで並べ替え / ゴミ箱で削除', style: Theme.of(context).textTheme.bodySmall),
+                    ],
+                  ),
+                  const SizedBox(height: 8),
+                  _loadingAppSettings
+                      ? const Center(child: Padding(padding: EdgeInsets.all(12), child: CircularProgressIndicator()))
+                      : ReorderableListView.builder(
+                          shrinkWrap: true,
+                          physics: const NeverScrollableScrollPhysics(),
+                          itemCount: _menuItems.length,
+                          onReorder: _reorderMenu,
+                          itemBuilder: (ctx, index) {
+                            final item = _menuItems[index];
+                            return ListTile(
+                              key: ValueKey(item.id),
+                              leading: _menuLeading(item),
+                              title: Text(item.title),
+                              subtitle: Text(_routeLabel(item.route)),
+                              trailing: IconButton(
+                                icon: const Icon(Icons.delete_forever, color: Colors.redAccent),
+                                onPressed: () => _removeMenuItem(item.id),
+                              ),
+                            );
+                          },
+                        ),
+                  const SizedBox(height: 8),
+                  Align(
+                    alignment: Alignment.centerRight,
+                    child: ElevatedButton.icon(
+                      icon: const Icon(Icons.save),
+                      label: const Text('ホーム設定を保存'),
+                      onPressed: _loadingAppSettings ? null : _saveAppSettings,
                     ),
                   ),
                 ],
@@ -281,32 +365,30 @@ class _SettingsScreenState extends State<SettingsScreen> {
             ),
             _section(
               title: '自社情報',
-              subtitle: '会社名・住所・登録番号など',
+              subtitle: '会社・担当者・振込口座・電話帳取り込み',
               child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
-                  TextField(controller: _companyNameCtrl, decoration: const InputDecoration(labelText: '会社名')),
+                  const Text('自社/担当者情報、振込口座設定、メールフッタをまとめて編集できます。'),
-                  TextField(controller: _companyZipCtrl, decoration: const InputDecoration(labelText: '郵便番号')),
+                  const SizedBox(height: 12),
-                  TextField(controller: _companyAddrCtrl, decoration: const InputDecoration(labelText: '住所')),
-                  TextField(controller: _companyTelCtrl, decoration: const InputDecoration(labelText: '電話番号')),
-                  TextField(controller: _companyFaxCtrl, decoration: const InputDecoration(labelText: 'FAX番号')),
-                  TextField(controller: _companyEmailCtrl, decoration: const InputDecoration(labelText: 'メールアドレス')),
-                  TextField(controller: _companyUrlCtrl, decoration: const InputDecoration(labelText: 'URL')),
-                  TextField(controller: _companyRegCtrl, decoration: const InputDecoration(labelText: '登録番号 (インボイス)')),
-                  const SizedBox(height: 8),
                   Row(
                     children: [
                       OutlinedButton.icon(
-                        icon: const Icon(Icons.upload_file),
+                        icon: const Icon(Icons.info_outline),
-                        label: const Text('画面で編集'),
+                        label: const Text('旧画面 (税率/印影)'),
                         onPressed: () async {
                           await Navigator.push(context, MaterialPageRoute(builder: (context) => const CompanyInfoScreen()));
                         },
                       ),
                       const SizedBox(width: 8),
-                      ElevatedButton.icon(
+                      Expanded(
-                        icon: const Icon(Icons.save),
+                        child: ElevatedButton.icon(
-                        label: const Text('保存'),
+                          icon: const Icon(Icons.business),
-                        onPressed: _saveCompany,
+                          label: const Text('自社情報ページを開く'),
+                          onPressed: () async {
+                            await Navigator.push(context, MaterialPageRoute(builder: (context) => const BusinessProfileScreen()));
+                          },
+                        ),
                       ),
                     ],
                   ),
@@ -314,40 +396,25 @@ class _SettingsScreenState extends State<SettingsScreen> {
               ),
             ),
             _section(
-              title: '担当者情報',
+              title: 'メール設定（SM画面へ）',
-              subtitle: '署名や連絡先（送信者情報）',
+              subtitle: 'SMTP・端末メーラー・BCC必須・ログ閲覧など',
               child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
-                  TextField(controller: _staffNameCtrl, decoration: const InputDecoration(labelText: '担当者名')),
+                  const Text('メール送信に関する設定は専用画面でまとめて編集できます。'),
-                  TextField(controller: _staffMailCtrl, decoration: const InputDecoration(labelText: 'メールアドレス')),
+                  const SizedBox(height: 12),
-                  const SizedBox(height: 8),
+                  Align(
-                  ElevatedButton.icon(
+                    alignment: Alignment.centerRight,
-                    icon: const Icon(Icons.save),
+                    child: ElevatedButton.icon(
-                    label: const Text('保存'),
+                      icon: const Icon(Icons.mail_outline),
-                    onPressed: _saveStaff,
+                      label: const Text('メール設定を開く'),
-                  ),
+                      onPressed: () async {
-                ],
+                        await Navigator.push(
-              ),
+                          context,
-            ),
+                          MaterialPageRoute(builder: (context) => const EmailSettingsScreen()),
-            _section(
+                        );
-              title: 'SMTP情報',
+                      },
-              subtitle: 'メール送信サーバ設定（テンプレ）',
+                    ),
-              child: Column(
-                children: [
-                  TextField(controller: _smtpHostCtrl, decoration: const InputDecoration(labelText: 'ホスト名')),
-                  TextField(controller: _smtpPortCtrl, decoration: const InputDecoration(labelText: 'ポート番号'), keyboardType: TextInputType.number),
-                  TextField(controller: _smtpUserCtrl, decoration: const InputDecoration(labelText: 'ユーザー名')),
-                  TextField(controller: _smtpPassCtrl, decoration: const InputDecoration(labelText: 'パスワード'), obscureText: true),
-                  TextField(controller: _smtpBccCtrl, decoration: const InputDecoration(labelText: 'BCC (カンマ区切り可)')),
-                  SwitchListTile(
-                    title: const Text('STARTTLS を使用'),
-                    value: _smtpTls,
-                    onChanged: (v) => setState(() => _smtpTls = v),
-                  ),
-                  ElevatedButton.icon(
-                    icon: const Icon(Icons.save),
-                    label: const Text('保存'),
-                    onPressed: _saveSmtp,
                   ),
                 ],
               ),
@@ -413,7 +480,12 @@ class _SettingsScreenState extends State<SettingsScreen> {
                   ElevatedButton.icon(
                     icon: const Icon(Icons.save),
                     label: const Text('保存'),
-                    onPressed: () => _showSnackbar('テーマ設定を保存（テンプレ）: $_theme'),
+                    onPressed: () async {
+                      await _appSettingsRepo.setTheme(_theme);
+                      await AppThemeController.instance.setTheme(_theme);
+                      if (!mounted) return;
+                      _showSnackbar('テーマ設定を保存しました');
+                    },
                   ),
                 ],
               ),

lib/services/app_settings_repository.dart

@@ -0,0 +1,144 @@
+import 'dart:convert';
+import 'package:sqflite/sqflite.dart';
+import 'database_helper.dart';
+
+class AppSettingsRepository {
+  static const _kHomeMode = 'home_mode'; // 'invoice_history' or 'dashboard'
+  static const _kDashboardStatusEnabled = 'dashboard_status_enabled';
+  static const _kDashboardStatusText = 'dashboard_status_text';
+  static const _kDashboardMenu = 'dashboard_menu';
+  static const _kDashboardHistoryUnlocked = 'dashboard_history_unlocked';
+  static const _kTheme = 'app_theme'; // light / dark / system
+  static const _kSummaryTheme = 'summary_theme'; // 'white' or 'blue'
+
+  final DatabaseHelper _dbHelper = DatabaseHelper();
+
+  Future<void> _ensureTable() async {
+    final db = await _dbHelper.database;
+    await db.execute('''
+      CREATE TABLE IF NOT EXISTS app_settings (
+        key TEXT PRIMARY KEY,
+        value TEXT
+      )
+    ''');
+  }
+
+  Future<String> getHomeMode() async {
+    final v = await _getValue(_kHomeMode);
+    return v ?? 'invoice_history';
+  }
+
+  Future<void> setHomeMode(String mode) async {
+    await _setValue(_kHomeMode, mode);
+  }
+
+  Future<bool> getDashboardStatusEnabled() async {
+    final v = await _getValue(_kDashboardStatusEnabled);
+    if (v == null) return true; // デフォルト表示ON
+    return v == '1' || v.toLowerCase() == 'true';
+  }
+
+  Future<void> setDashboardStatusEnabled(bool enabled) async {
+    await _setValue(_kDashboardStatusEnabled, enabled ? '1' : '0');
+  }
+
+  Future<String> getDashboardStatusText() async {
+    return await _getValue(_kDashboardStatusText) ?? '工事中';
+  }
+
+  Future<void> setDashboardStatusText(String text) async {
+    await _setValue(_kDashboardStatusText, text);
+  }
+
+  Future<List<DashboardMenuItem>> getDashboardMenu() async {
+    final raw = await _getValue(_kDashboardMenu);
+    if (raw == null || raw.isEmpty) {
+      return [DashboardMenuItem(id: 'a2', title: '伝票一覧', route: 'invoice_history', iconName: 'list_alt')];
+    }
+    try {
+      final decoded = jsonDecode(raw);
+      if (decoded is List) {
+        return decoded.map((e) => DashboardMenuItem.fromJson(e as Map<String, dynamic>)).toList();
+      }
+    } catch (_) {}
+    return [DashboardMenuItem(id: 'a2', title: '伝票一覧', route: 'invoice_history', iconName: 'list_alt')];
+  }
+
+  Future<void> setDashboardMenu(List<DashboardMenuItem> items) async {
+    final raw = jsonEncode(items.map((e) => e.toJson()).toList());
+    await _setValue(_kDashboardMenu, raw);
+  }
+
+  Future<bool> getDashboardHistoryUnlocked() async => getBool(_kDashboardHistoryUnlocked, defaultValue: false);
+  Future<void> setDashboardHistoryUnlocked(bool unlocked) async => setBool(_kDashboardHistoryUnlocked, unlocked);
+
+  Future<String> getTheme() async => await getString(_kTheme) ?? 'system';
+  Future<void> setTheme(String theme) async => setString(_kTheme, theme);
+
+  Future<String> getSummaryTheme() async => await getString(_kSummaryTheme) ?? 'white';
+  Future<void> setSummaryTheme(String theme) async => setString(_kSummaryTheme, theme);
+
+  // Generic helpers
+  Future<String?> getString(String key) async => _getValue(key);
+  Future<void> setString(String key, String value) async => _setValue(key, value);
+
+  Future<bool> getBool(String key, {bool defaultValue = false}) async {
+    final v = await _getValue(key);
+    if (v == null) return defaultValue;
+    return v == '1' || v.toLowerCase() == 'true';
+  }
+
+  Future<void> setBool(String key, bool value) async => _setValue(key, value ? '1' : '0');
+
+  Future<String?> _getValue(String key) async {
+    await _ensureTable();
+    final db = await _dbHelper.database;
+    final res = await db.query('app_settings', where: 'key = ?', whereArgs: [key], limit: 1);
+    if (res.isEmpty) return null;
+    return res.first['value'] as String?;
+  }
+
+  Future<void> _setValue(String key, String value) async {
+    await _ensureTable();
+    final db = await _dbHelper.database;
+    await db.insert('app_settings', {'key': key, 'value': value}, conflictAlgorithm: ConflictAlgorithm.replace);
+  }
+}
+
+class DashboardMenuItem {
+  final String id;
+  final String title;
+  final String route;
+  final String? iconName; // Material icon name
+  final String? customIconPath; // optional local file path
+
+  DashboardMenuItem({required this.id, required this.title, required this.route, this.iconName, this.customIconPath});
+
+  DashboardMenuItem copyWith({String? id, String? title, String? route, String? iconName, String? customIconPath}) {
+    return DashboardMenuItem(
+      id: id ?? this.id,
+      title: title ?? this.title,
+      route: route ?? this.route,
+      iconName: iconName ?? this.iconName,
+      customIconPath: customIconPath ?? this.customIconPath,
+    );
+  }
+
+  Map<String, dynamic> toJson() => {
+        'id': id,
+        'title': title,
+        'route': route,
+        'iconName': iconName,
+        'customIconPath': customIconPath,
+      };
+
+  factory DashboardMenuItem.fromJson(Map<String, dynamic> json) {
+    return DashboardMenuItem(
+      id: json['id'] as String,
+      title: json['title'] as String,
+      route: json['route'] as String,
+      iconName: json['iconName'] as String?,
+      customIconPath: json['customIconPath'] as String?,
+    );
+  }
+}

lib/services/company_profile_service.dart

@@ -0,0 +1,265 @@
+import 'dart:convert';
+
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../constants/company_profile_keys.dart';
+import '../constants/mail_templates.dart';
+import 'app_settings_repository.dart';
+
+class CompanyBankAccount {
+  final String bankName;
+  final String branchName;
+  final String accountType;
+  final String accountNumber;
+  final String holderName;
+  final bool isActive;
+
+  const CompanyBankAccount({
+    this.bankName = '',
+    this.branchName = '',
+    this.accountType = '普通',
+    this.accountNumber = '',
+    this.holderName = '',
+    this.isActive = false,
+  });
+
+  CompanyBankAccount copyWith({
+    String? bankName,
+    String? branchName,
+    String? accountType,
+    String? accountNumber,
+    String? holderName,
+    bool? isActive,
+  }) {
+    return CompanyBankAccount(
+      bankName: bankName ?? this.bankName,
+      branchName: branchName ?? this.branchName,
+      accountType: accountType ?? this.accountType,
+      accountNumber: accountNumber ?? this.accountNumber,
+      holderName: holderName ?? this.holderName,
+      isActive: isActive ?? this.isActive,
+    );
+  }
+
+  Map<String, dynamic> toJson() => {
+        'bankName': bankName,
+        'branchName': branchName,
+        'accountType': accountType,
+        'accountNumber': accountNumber,
+        'holderName': holderName,
+        'isActive': isActive,
+      };
+
+  factory CompanyBankAccount.fromJson(Map<String, dynamic> json) {
+    return CompanyBankAccount(
+      bankName: json['bankName'] as String? ?? '',
+      branchName: json['branchName'] as String? ?? '',
+      accountType: json['accountType'] as String? ?? '普通',
+      accountNumber: json['accountNumber'] as String? ?? '',
+      holderName: json['holderName'] as String? ?? '',
+      isActive: (json['isActive'] as bool?) ?? false,
+    );
+  }
+}
+
+class CompanyProfile {
+  final String companyName;
+  final String companyZip;
+  final String companyAddress;
+  final String companyTel;
+  final String companyFax;
+  final String companyEmail;
+  final String companyUrl;
+  final String companyReg;
+  final String staffName;
+  final String staffEmail;
+  final String staffMobile;
+  final List<CompanyBankAccount> bankAccounts;
+  final double taxRate;
+  final String taxDisplayMode;
+  final String? sealPath;
+
+  const CompanyProfile({
+    this.companyName = '',
+    this.companyZip = '',
+    this.companyAddress = '',
+    this.companyTel = '',
+    this.companyFax = '',
+    this.companyEmail = '',
+    this.companyUrl = '',
+    this.companyReg = '',
+    this.staffName = '',
+    this.staffEmail = '',
+    this.staffMobile = '',
+    List<CompanyBankAccount>? bankAccounts,
+    this.taxRate = 0.10,
+    this.taxDisplayMode = 'normal',
+    this.sealPath,
+  }) : bankAccounts = bankAccounts ?? const [
+          CompanyBankAccount(),
+          CompanyBankAccount(),
+          CompanyBankAccount(),
+          CompanyBankAccount(),
+        ];
+
+  CompanyProfile copyWith({
+    String? companyName,
+    String? companyZip,
+    String? companyAddress,
+    String? companyTel,
+    String? companyFax,
+    String? companyEmail,
+    String? companyUrl,
+    String? companyReg,
+    String? staffName,
+    String? staffEmail,
+    String? staffMobile,
+    List<CompanyBankAccount>? bankAccounts,
+    double? taxRate,
+    String? taxDisplayMode,
+    String? sealPath,
+  }) {
+    return CompanyProfile(
+      companyName: companyName ?? this.companyName,
+      companyZip: companyZip ?? this.companyZip,
+      companyAddress: companyAddress ?? this.companyAddress,
+      companyTel: companyTel ?? this.companyTel,
+      companyFax: companyFax ?? this.companyFax,
+      companyEmail: companyEmail ?? this.companyEmail,
+      companyUrl: companyUrl ?? this.companyUrl,
+      companyReg: companyReg ?? this.companyReg,
+      staffName: staffName ?? this.staffName,
+      staffEmail: staffEmail ?? this.staffEmail,
+      staffMobile: staffMobile ?? this.staffMobile,
+      bankAccounts: bankAccounts ?? this.bankAccounts,
+      taxRate: taxRate ?? this.taxRate,
+      taxDisplayMode: taxDisplayMode ?? this.taxDisplayMode,
+      sealPath: sealPath ?? this.sealPath,
+    );
+  }
+}
+
+class CompanyProfileService {
+  CompanyProfileService({AppSettingsRepository? repo}) : _repo = repo ?? AppSettingsRepository();
+
+  final AppSettingsRepository _repo;
+
+  Future<CompanyProfile> loadProfile() async {
+    final prefs = await SharedPreferences.getInstance();
+
+    Future<String> loadString(String key) async {
+      final prefValue = prefs.getString(key);
+      if (prefValue != null) return prefValue;
+      return await _repo.getString(key) ?? '';
+    }
+
+    final accountsRaw = prefs.getString(kCompanyBankAccountsKey) ?? await _repo.getString(kCompanyBankAccountsKey);
+    final accounts = _decodeAccounts(accountsRaw);
+    final taxRateStr = prefs.getString(kCompanyTaxRateKey) ?? await _repo.getString(kCompanyTaxRateKey);
+    final taxMode = prefs.getString(kCompanyTaxDisplayModeKey) ?? await _repo.getString(kCompanyTaxDisplayModeKey);
+    final sealPath = prefs.getString(kCompanySealPathKey) ?? await _repo.getString(kCompanySealPathKey);
+
+    return CompanyProfile(
+      companyName: await loadString(kCompanyNameKey),
+      companyZip: await loadString(kCompanyZipKey),
+      companyAddress: await loadString(kCompanyAddressKey),
+      companyTel: await loadString(kCompanyTelKey),
+      companyFax: await loadString(kCompanyFaxKey),
+      companyEmail: await loadString(kCompanyEmailKey),
+      companyUrl: await loadString(kCompanyUrlKey),
+      companyReg: await loadString(kCompanyRegKey),
+      staffName: await loadString(kStaffNameKey),
+      staffEmail: await loadString(kStaffEmailKey),
+      staffMobile: await loadString(kStaffMobileKey),
+      bankAccounts: accounts,
+      taxRate: double.tryParse(taxRateStr ?? '') ?? 0.10,
+      taxDisplayMode: taxMode ?? 'normal',
+      sealPath: sealPath?.isNotEmpty == true ? sealPath : null,
+    );
+  }
+
+  Future<void> saveProfile(CompanyProfile profile) async {
+    final prefs = await SharedPreferences.getInstance();
+
+    Future<void> persist(String key, String value) async {
+      await prefs.setString(key, value);
+      await _repo.setString(key, value);
+    }
+
+    await persist(kCompanyNameKey, profile.companyName);
+    await persist(kCompanyZipKey, profile.companyZip);
+    await persist(kCompanyAddressKey, profile.companyAddress);
+    await persist(kCompanyTelKey, profile.companyTel);
+    await persist(kCompanyFaxKey, profile.companyFax);
+    await persist(kCompanyEmailKey, profile.companyEmail);
+    await persist(kCompanyUrlKey, profile.companyUrl);
+    await persist(kCompanyRegKey, profile.companyReg);
+    await persist(kStaffNameKey, profile.staffName);
+    await persist(kStaffEmailKey, profile.staffEmail);
+    await persist(kStaffMobileKey, profile.staffMobile);
+
+    final accountsJson = jsonEncode(profile.bankAccounts.map((e) => e.toJson()).toList());
+    await persist(kCompanyBankAccountsKey, accountsJson);
+    await persist(kCompanyTaxRateKey, profile.taxRate.toString());
+    await persist(kCompanyTaxDisplayModeKey, profile.taxDisplayMode);
+    await persist(kCompanySealPathKey, profile.sealPath ?? '');
+  }
+
+  Future<Map<String, String>> buildMailPlaceholderMap({
+    required String filename,
+    required String hash,
+  }) async {
+    final profile = await loadProfile();
+    final activeAccounts = profile.bankAccounts.where((e) => e.isActive && e.bankName.trim().isNotEmpty).toList();
+    final bankText = _composeBankText(activeAccounts);
+
+    return {
+      kMailPlaceholderFilename: filename,
+      kMailPlaceholderHash: hash,
+      kMailPlaceholderCompanyName: profile.companyName.isNotEmpty ? profile.companyName : '弊社',
+      kMailPlaceholderCompanyEmail: profile.companyEmail.isNotEmpty ? profile.companyEmail : profile.staffEmail,
+      kMailPlaceholderCompanyTel: profile.companyTel,
+      kMailPlaceholderCompanyAddress: profile.companyAddress,
+      kMailPlaceholderCompanyReg: profile.companyReg,
+      kMailPlaceholderStaffName: profile.staffName.isNotEmpty ? profile.staffName : '担当者',
+      kMailPlaceholderStaffEmail: profile.staffEmail,
+      kMailPlaceholderStaffMobile: profile.staffMobile.isNotEmpty ? profile.staffMobile : '---',
+      kMailPlaceholderBankAccounts: bankText,
+    };
+  }
+
+  List<CompanyBankAccount> _decodeAccounts(String? raw) {
+    if (raw == null || raw.isEmpty) {
+      return List.generate(kCompanyBankSlotCount, (_) => const CompanyBankAccount());
+    }
+    try {
+      final decoded = jsonDecode(raw);
+      if (decoded is List) {
+        final list = decoded
+            .map((e) => CompanyBankAccount.fromJson(Map<String, dynamic>.from(e as Map)))
+            .toList();
+        while (list.length < kCompanyBankSlotCount) {
+          list.add(const CompanyBankAccount());
+        }
+        return list.take(kCompanyBankSlotCount).toList();
+      }
+    } catch (_) {
+      // ignore malformed data
+    }
+    return List.generate(kCompanyBankSlotCount, (_) => const CompanyBankAccount());
+  }
+
+  String _composeBankText(List<CompanyBankAccount> accounts) {
+    if (accounts.isEmpty) {
+      return '振込先: ご入金方法は別途ご案内いたします。';
+    }
+    final buffer = StringBuffer('振込先:\n');
+    for (var i = 0; i < accounts.length && i < kCompanyBankActiveLimit; i++) {
+      final acc = accounts[i];
+      buffer.writeln(
+        '(${i + 1}) ${acc.bankName} ${acc.branchName} ${acc.accountType} ${acc.accountNumber} ${acc.holderName}',
+      );
+    }
+    return buffer.toString().trim();
+  }
+}

lib/services/customer_repository.dart

@@ -9,21 +9,28 @@ class CustomerRepository {
   final DatabaseHelper _dbHelper = DatabaseHelper();
   final ActivityLogRepository _logRepo = ActivityLogRepository();
 
-  Future<List<Customer>> getAllCustomers() async {
+  Future<List<Customer>> getAllCustomers({bool includeHidden = false}) async {
     final db = await _dbHelper.database;
+    final filter = includeHidden ? '' : 'WHERE COALESCE(mh.is_hidden, c.is_hidden, 0) = 0';
     List<Map<String, dynamic>> maps = await db.rawQuery('''
-      SELECT c.*, cc.address AS contact_address, cc.tel AS contact_tel, cc.email AS contact_email
+      SELECT c.*, cc.address AS contact_address, cc.tel AS contact_tel, cc.email AS contact_email,
+             COALESCE(mh.is_hidden, c.is_hidden, 0) AS is_hidden
       FROM customers c
       LEFT JOIN customer_contacts cc ON cc.customer_id = c.id AND cc.is_active = 1
-      ORDER BY c.display_name ASC
+      LEFT JOIN master_hidden mh ON mh.master_type = 'customer' AND mh.master_id = c.id
+      $filter
+      ORDER BY ${includeHidden ? 'c.id DESC' : 'c.display_name ASC'}
     ''');
     if (maps.isEmpty) {
       await _generateSampleCustomers(limit: 3);
       maps = await db.rawQuery('''
-        SELECT c.*, cc.address AS contact_address, cc.tel AS contact_tel, cc.email AS contact_email
+        SELECT c.*, cc.address AS contact_address, cc.tel AS contact_tel, cc.email AS contact_email,
+               COALESCE(mh.is_hidden, c.is_hidden, 0) AS is_hidden
         FROM customers c
         LEFT JOIN customer_contacts cc ON cc.customer_id = c.id AND cc.is_active = 1
-        ORDER BY c.display_name ASC
+        LEFT JOIN master_hidden mh ON mh.master_type = 'customer' AND mh.master_id = c.id
+        $filter
+        ORDER BY ${includeHidden ? 'c.id DESC' : 'c.display_name ASC'}
       ''');
     }
     return List.generate(maps.length, (i) => Customer.fromMap(maps[i]));
@@ -128,14 +135,17 @@ class CustomerRepository {
     );
   }
 
-  Future<List<Customer>> searchCustomers(String query) async {
+  Future<List<Customer>> searchCustomers(String query, {bool includeHidden = false}) async {
     final db = await _dbHelper.database;
+    final where = includeHidden ? '' : 'AND COALESCE(mh.is_hidden, c.is_hidden, 0) = 0';
     final List<Map<String, dynamic>> maps = await db.rawQuery('''
-      SELECT c.*, cc.address AS contact_address, cc.tel AS contact_tel, cc.email AS contact_email
+      SELECT c.*, cc.address AS contact_address, cc.tel AS contact_tel, cc.email AS contact_email,
+             COALESCE(mh.is_hidden, c.is_hidden, 0) AS is_hidden
       FROM customers c
       LEFT JOIN customer_contacts cc ON cc.customer_id = c.id AND cc.is_active = 1
-      WHERE c.display_name LIKE ? OR c.formal_name LIKE ?
+      LEFT JOIN master_hidden mh ON mh.master_type = 'customer' AND mh.master_id = c.id
-      ORDER BY c.display_name ASC
+      WHERE (c.display_name LIKE ? OR c.formal_name LIKE ?) $where
+      ORDER BY ${includeHidden ? 'c.id DESC' : 'c.display_name ASC'}
       LIMIT 50
     ''', ['%$query%', '%$query%']);
     return List.generate(maps.length, (i) => Customer.fromMap(maps[i]));
@@ -173,6 +183,25 @@ class CustomerRepository {
     return CustomerContact.fromMap(rows.first);
   }
 
+  Future<void> setHidden(String id, bool hidden) async {
+    final db = await _dbHelper.database;
+    await db.insert(
+      'master_hidden',
+      {
+        'master_type': 'customer',
+        'master_id': id,
+        'is_hidden': hidden ? 1 : 0,
+      },
+      conflictAlgorithm: ConflictAlgorithm.replace,
+    );
+    await _logRepo.logAction(
+      action: hidden ? "HIDE_CUSTOMER" : "UNHIDE_CUSTOMER",
+      targetType: "CUSTOMER",
+      targetId: id,
+      details: hidden ? "顧客を非表示にしました" : "顧客を再表示しました",
+    );
+  }
+
   Future<int> _nextContactVersion(DatabaseExecutor txn, String customerId) async {
     final res = await txn.rawQuery('SELECT MAX(version) as v FROM customer_contacts WHERE customer_id = ?', [customerId]);
     final current = res.first['v'] as int?;

lib/services/database_helper.dart

@@ -2,7 +2,7 @@ import 'package:sqflite/sqflite.dart';
 import 'package:path/path.dart';
 
 class DatabaseHelper {
-  static const _databaseVersion = 20;
+  static const _databaseVersion = 25;
   static final DatabaseHelper _instance = DatabaseHelper._internal();
   static Database? _database;
 
@@ -164,6 +164,37 @@ class DatabaseHelper {
     if (oldVersion < 20) {
       await _safeAddColumn(db, 'customers', 'email TEXT');
     }
+    if (oldVersion < 22) {
+      await db.execute('''
+        CREATE TABLE IF NOT EXISTS app_settings (
+          key TEXT PRIMARY KEY,
+          value TEXT
+        )
+      ''');
+    }
+    if (oldVersion < 23) {
+      await _safeAddColumn(db, 'customers', 'is_hidden INTEGER DEFAULT 0');
+      await _safeAddColumn(db, 'products', 'is_hidden INTEGER DEFAULT 0');
+      await db.execute('CREATE INDEX IF NOT EXISTS idx_customers_hidden ON customers(is_hidden)');
+      await db.execute('CREATE INDEX IF NOT EXISTS idx_products_hidden ON products(is_hidden)');
+    }
+    if (oldVersion < 24) {
+      await db.execute('''
+        CREATE TABLE IF NOT EXISTS master_hidden (
+          master_type TEXT NOT NULL,
+          master_id TEXT NOT NULL,
+          is_hidden INTEGER DEFAULT 0,
+          PRIMARY KEY(master_type, master_id)
+        )
+      ''');
+      await db.execute('CREATE INDEX IF NOT EXISTS idx_master_hidden_type ON master_hidden(master_type)');
+    }
+    if (oldVersion < 25) {
+      await _safeAddColumn(db, 'invoices', 'company_snapshot TEXT');
+      await _safeAddColumn(db, 'invoices', 'company_seal_hash TEXT');
+      await _safeAddColumn(db, 'invoices', 'meta_json TEXT');
+      await _safeAddColumn(db, 'invoices', 'meta_hash TEXT');
+    }
   }
 
   Future<void> _onCreate(Database db, int version) async {
@@ -182,6 +213,7 @@ class DatabaseHelper {
         head_char1 TEXT,
         head_char2 TEXT,
         is_locked INTEGER DEFAULT 0,
+        is_hidden INTEGER DEFAULT 0,
         is_synced INTEGER DEFAULT 0,
         updated_at TEXT NOT NULL
       )
@@ -223,12 +255,23 @@ class DatabaseHelper {
         category TEXT,
         stock_quantity INTEGER DEFAULT 0,
         is_locked INTEGER DEFAULT 0,
+        is_hidden INTEGER DEFAULT 0,
         odoo_id TEXT
       )
     ''');
     await db.execute('CREATE INDEX idx_products_name ON products(name)');
     await db.execute('CREATE INDEX idx_products_barcode ON products(barcode)');
 
+    await db.execute('''
+      CREATE TABLE master_hidden (
+        master_type TEXT NOT NULL,
+        master_id TEXT NOT NULL,
+        is_hidden INTEGER DEFAULT 0,
+        PRIMARY KEY(master_type, master_id)
+      )
+    ''');
+    await db.execute('CREATE INDEX idx_master_hidden_type ON master_hidden(master_type)');
+
     // 伝票マスター
     await db.execute('''
       CREATE TABLE invoices (
@@ -255,6 +298,10 @@ class DatabaseHelper {
         contact_email_snapshot TEXT,
         contact_tel_snapshot TEXT,
         contact_address_snapshot TEXT,
+        company_snapshot TEXT,
+        company_seal_hash TEXT,
+        meta_json TEXT,
+        meta_hash TEXT,
         FOREIGN KEY (customer_id) REFERENCES customers (id)
       )
     ''');
@@ -305,6 +352,13 @@ class DatabaseHelper {
         timestamp TEXT NOT NULL
       )
     ''');
+
+    await db.execute('''
+      CREATE TABLE app_settings (
+        key TEXT PRIMARY KEY,
+        value TEXT
+      )
+    ''');
   }
 
   Future<void> _safeAddColumn(Database db, String table, String columnDef) async {

lib/services/edit_log_repository.dart

@@ -0,0 +1,60 @@
+import 'database_helper.dart';
+
+class EditLogRepository {
+  final DatabaseHelper _dbHelper = DatabaseHelper();
+
+  Future<void> _ensureTable() async {
+    final db = await _dbHelper.database;
+    await db.execute('''
+      CREATE TABLE IF NOT EXISTS edit_logs (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        invoice_id TEXT,
+        message TEXT,
+        created_at INTEGER
+      )
+    ''');
+  }
+
+  Future<void> addLog(String invoiceId, String message) async {
+    await _ensureTable();
+    final db = await _dbHelper.database;
+    final now = DateTime.now().millisecondsSinceEpoch;
+    // cleanup older than 30 days
+    final cutoff = DateTime.now().subtract(const Duration(days: 30)).millisecondsSinceEpoch;
+    await db.delete('edit_logs', where: 'created_at < ?', whereArgs: [cutoff]);
+    await db.insert('edit_logs', {
+      'invoice_id': invoiceId,
+      'message': message,
+      'created_at': now,
+    });
+  }
+
+  Future<List<EditLogEntry>> getLogs(String invoiceId) async {
+    await _ensureTable();
+    final db = await _dbHelper.database;
+    final cutoff = DateTime.now().subtract(const Duration(days: 14)).millisecondsSinceEpoch;
+    final res = await db.query(
+      'edit_logs',
+      where: 'invoice_id = ? AND created_at >= ?',
+      whereArgs: [invoiceId, cutoff],
+      orderBy: 'created_at DESC',
+    );
+    return res
+        .map((e) => EditLogEntry(
+              id: e['id'] as int,
+              invoiceId: e['invoice_id'] as String,
+              message: e['message'] as String,
+              createdAt: DateTime.fromMillisecondsSinceEpoch(e['created_at'] as int),
+            ))
+        .toList();
+  }
+}
+
+class EditLogEntry {
+  final int id;
+  final String invoiceId;
+  final String message;
+  final DateTime createdAt;
+
+  EditLogEntry({required this.id, required this.invoiceId, required this.message, required this.createdAt});
+}

lib/services/email_sender.dart

@@ -0,0 +1,238 @@
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:mailer/mailer.dart';
+import 'package:mailer/smtp_server.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class EmailSenderConfig {
+  final String host;
+  final int port;
+  final String username;
+  final String password;
+  final bool useTls;
+  final bool ignoreBadCert;
+  final List<String> bcc;
+
+  const EmailSenderConfig({
+    required this.host,
+    required this.port,
+    required this.username,
+    required this.password,
+    this.useTls = true,
+    this.ignoreBadCert = false,
+    this.bcc = const [],
+  });
+
+  bool get isValid => host.isNotEmpty && username.isNotEmpty && password.isNotEmpty;
+}
+
+class EmailSender {
+  static const _kCryptKey = 'test';
+  static const _kLogsKey = 'smtp_logs';
+  static const int _kMaxLogLines = 1000;
+
+  static List<String> parseBcc(String raw) {
+    return raw
+        .split(RegExp('[,\n]'))
+        .map((s) => s.trim())
+        .where((s) => s.isNotEmpty)
+        .toList();
+  }
+
+  static String decrypt(String cipher) {
+    if (cipher.isEmpty) return '';
+    try {
+      final ob = base64Decode(cipher);
+      final kb = utf8.encode(_kCryptKey);
+      final pb = List<int>.generate(ob.length, (i) => ob[i] ^ kb[i % kb.length]);
+      return utf8.decode(pb);
+    } catch (_) {
+      return cipher;
+    }
+  }
+
+  static Future<void> _appendLog(String line) async {
+    final prefs = await SharedPreferences.getInstance();
+    final now = DateTime.now().toIso8601String();
+    final entry = '[$now] $line';
+    final existing = List<String>.from(prefs.getStringList(_kLogsKey) ?? const <String>[]);
+    existing.add(entry);
+    if (existing.length > _kMaxLogLines) {
+      final dropCount = existing.length - _kMaxLogLines;
+      existing.removeRange(0, dropCount);
+    }
+    await prefs.setStringList(_kLogsKey, existing);
+  }
+
+  static Future<List<String>> loadLogs() async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.getStringList(_kLogsKey) ?? <String>[];
+  }
+
+  static Future<void> clearLogs() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove(_kLogsKey);
+  }
+
+  static Future<bool> _checkPortOpen(String host, int port, {Duration timeout = const Duration(seconds: 5)}) async {
+    try {
+      final socket = await Socket.connect(host, port, timeout: timeout);
+      await socket.close();
+      await _appendLog('[TEST][PORT][OK] $host:$port reachable');
+      return true;
+    } catch (e) {
+      await _appendLog('[TEST][PORT][NG] $host:$port err=$e');
+      return false;
+    }
+  }
+
+  static Future<bool> _checkAndLogConfig({required EmailSenderConfig config, required String channel}) async {
+    final checks = <String, bool>{
+      'host': config.host.isNotEmpty,
+      'port': config.port > 0,
+      'user': config.username.isNotEmpty,
+      'pass': config.password.isNotEmpty,
+      'bcc': config.bcc.isNotEmpty,
+    };
+
+    String valMask(String key) {
+      switch (key) {
+        case 'host':
+          return config.host;
+        case 'port':
+          return config.port.toString();
+        case 'user':
+          return config.username;
+        case 'pass':
+          return config.password.isNotEmpty ? '***' : '';
+        case 'bcc':
+          return config.bcc.join(',');
+        default:
+          return '';
+      }
+    }
+
+    final summary = checks.entries
+        .map((e) => '${e.key}=${valMask(e.key)} (${e.value ? 'OK' : 'NG'})')
+        .join(' | ');
+    final tail = 'tls=${config.useTls} ignoreBadCert=${config.ignoreBadCert}';
+    await _appendLog('[$channel][CFG] $summary | $tail');
+
+    return checks.values.every((v) => v);
+  }
+
+  static SmtpServer _serverFromConfig(EmailSenderConfig config) {
+    return SmtpServer(
+      config.host,
+      port: config.port,
+      username: config.username,
+      password: config.password,
+      ssl: !config.useTls,
+      allowInsecure: config.ignoreBadCert || !config.useTls,
+      ignoreBadCertificate: config.ignoreBadCert,
+    );
+  }
+
+  static Future<EmailSenderConfig?> loadConfigFromPrefs() async {
+    final prefs = await SharedPreferences.getInstance();
+    final host = (prefs.getString('smtp_host') ?? '').trim();
+    final portStr = (prefs.getString('smtp_port') ?? '587').trim();
+    final user = (prefs.getString('smtp_user') ?? '').trim();
+    final passEncrypted = prefs.getString('smtp_pass') ?? '';
+    final pass = decrypt(passEncrypted).trim();
+    final useTls = prefs.getBool('smtp_tls') ?? true;
+    final ignoreBadCert = prefs.getBool('smtp_ignore_bad_cert') ?? false;
+    final bccRaw = prefs.getString('smtp_bcc') ?? '';
+    final bccList = parseBcc(bccRaw);
+    final port = int.tryParse(portStr) ?? 587;
+
+    final config = EmailSenderConfig(
+      host: host,
+      port: port,
+      username: user,
+      password: pass,
+      useTls: useTls,
+      ignoreBadCert: ignoreBadCert,
+      bcc: bccList,
+    );
+    if (!config.isValid) {
+      await _appendLog('[CFG][NG] host/user/pass が未入力の可能性があります');
+      return null;
+    }
+    return config;
+  }
+
+  static Future<void> sendTest({required EmailSenderConfig config}) async {
+    final server = _serverFromConfig(config);
+    final message = Message()
+      ..from = Address(config.username)
+      ..bccRecipients = config.bcc
+      ..subject = 'SMTPテスト送信'
+      ..text = 'これはテストメールです（BCC送信）';
+
+    final configOk = await _checkAndLogConfig(config: config, channel: 'TEST');
+    if (!configOk) {
+      throw StateError('SMTP設定が不足しています');
+    }
+
+    await _checkPortOpen(config.host, config.port);
+
+    try {
+      await send(message, server);
+      await _appendLog('[TEST][OK] bcc: ${config.bcc.join(',')}');
+    } catch (e) {
+      await _appendLog('[TEST][NG] err=$e (認証/暗号化設定を確認してください)');
+      rethrow;
+    }
+  }
+
+  static Future<void> sendInvoiceEmail({
+    required EmailSenderConfig config,
+    required String toEmail,
+    required File pdfFile,
+    String? subject,
+    String? attachmentFileName,
+    String? body,
+  }) async {
+    final server = _serverFromConfig(config);
+    final message = Message()
+      ..from = Address(config.username)
+      ..recipients = [toEmail]
+      ..bccRecipients = config.bcc
+      ..subject = subject ?? '請求書送付'
+      ..text = body ?? '請求書をお送りします。ご確認ください。'
+      ..attachments = [
+        FileAttachment(pdfFile)
+          ..fileName = attachmentFileName ?? 'invoice.pdf'
+          ..contentType = 'application/pdf'
+      ];
+
+    final configOk = await _checkAndLogConfig(config: config, channel: 'INVOICE');
+    if (!configOk) {
+      throw StateError('SMTP設定が不足しています');
+    }
+
+    try {
+      await send(message, server);
+      await _appendLog('[INVOICE][OK] to: $toEmail bcc: ${config.bcc.join(',')}');
+    } catch (e) {
+      await _appendLog('[INVOICE][NG] to: $toEmail err: $e');
+      rethrow;
+    }
+  }
+
+  static Future<void> logDeviceMailer({
+    required bool success,
+    required String toEmail,
+    required List<String> bcc,
+    String? error,
+  }) async {
+    final status = success ? 'OK' : 'NG';
+    final buffer = StringBuffer('[DEVICE][$status] to: $toEmail bcc: ${bcc.join(',')}');
+    if (error != null && error.isNotEmpty) {
+      buffer.write(' err: $error');
+    }
+    await _appendLog(buffer.toString());
+  }
+}

lib/services/invoice_repository.dart

@@ -1,4 +1,6 @@
 import 'dart:io';
+import 'dart:convert';
+import 'package:crypto/crypto.dart';
 import 'package:sqflite/sqflite.dart';
 import 'package:path_provider/path_provider.dart';
 import '../models/invoice_models.dart';
@@ -6,15 +8,38 @@ import '../models/customer_model.dart';
 import '../models/customer_contact.dart';
 import 'database_helper.dart';
 import 'activity_log_repository.dart';
+import 'company_repository.dart';
 
 class InvoiceRepository {
   final DatabaseHelper _dbHelper = DatabaseHelper();
   final ActivityLogRepository _logRepo = ActivityLogRepository();
+  final CompanyRepository _companyRepo = CompanyRepository();
 
   Future<void> saveInvoice(Invoice invoice) async {
     final db = await _dbHelper.database;
 
     // 正式発行（下書きでない）場合はロックを掛ける
+    final companyInfo = await _companyRepo.getCompanyInfo();
+    String? sealHash;
+    if (companyInfo.sealPath != null) {
+      final file = File(companyInfo.sealPath!);
+      if (await file.exists()) {
+        sealHash = sha256.convert(await file.readAsBytes()).toString();
+      }
+    }
+    final companySnapshot = jsonEncode({
+      'name': companyInfo.name,
+      'zipCode': companyInfo.zipCode,
+      'address': companyInfo.address,
+      'tel': companyInfo.tel,
+      'fax': companyInfo.fax,
+      'email': companyInfo.email,
+      'url': companyInfo.url,
+      'defaultTaxRate': companyInfo.defaultTaxRate,
+      'taxDisplayMode': companyInfo.taxDisplayMode,
+      'registrationNumber': companyInfo.registrationNumber,
+    });
+
     final Invoice toSave = invoice.isDraft ? invoice : invoice.copyWith(isLocked: true);
 
     await db.transaction((txn) async {
@@ -29,6 +54,10 @@ class InvoiceRepository {
         contactEmailSnapshot: activeContact?.email,
         contactTelSnapshot: activeContact?.tel,
         contactAddressSnapshot: activeContact?.address,
+        companySnapshot: companySnapshot,
+        companySealHash: sealHash,
+        metaJson: null,
+        metaHash: null,
       );
 
       // 在庫の調整（更新の場合、以前の数量を戻してから新しい数量を引く）
@@ -150,6 +179,10 @@ class InvoiceRepository {
         contactEmailSnapshot: iMap['contact_email_snapshot'],
         contactTelSnapshot: iMap['contact_tel_snapshot'],
         contactAddressSnapshot: iMap['contact_address_snapshot'],
+        companySnapshot: iMap['company_snapshot'],
+        companySealHash: iMap['company_seal_hash'],
+        metaJson: iMap['meta_json'],
+        metaHash: iMap['meta_hash'],
       ));
     }
     return invoices;
@@ -248,6 +281,21 @@ class InvoiceRepository {
     }
   }
 
+  /// meta_json と meta_hash の整合性を検証する（trueなら一致）。
+  bool verifyInvoiceMeta(Invoice invoice) {
+    final metaJson = invoice.metaJson ?? invoice.metaJsonValue;
+    final expected = sha256.convert(utf8.encode(metaJson)).toString();
+    final stored = invoice.metaHash ?? expected;
+    return expected == stored;
+  }
+
+  /// IDを指定してDBから取得し、メタデータ整合性を検証する。
+  Future<bool> verifyInvoiceMetaById(String id, List<Customer> customers) async {
+    final invoices = await getAllInvoices(customers);
+    final target = invoices.firstWhere((i) => i.id == id, orElse: () => throw Exception('invoice not found'));
+    return verifyInvoiceMeta(target);
+  }
+
   Future<Map<String, int>> getMonthlySales(int year) async {
     final db = await _dbHelper.database;
     final String yearStr = year.toString();

lib/services/pdf_generator.dart

@@ -11,7 +11,15 @@ import 'activity_log_repository.dart';
 
 /// PDFドキュメントの構築（プレビューと実保存の両方で使用）
 Future<pw.Document> buildInvoiceDocument(Invoice invoice) async {
-  final pdf = pw.Document();
+  final metaJson = invoice.metaJsonValue;
+  final metaHash = invoice.metaHashValue;
+
+  final pdf = pw.Document(
+    title: '${invoice.documentTypeName} ${invoice.invoiceNumber}',
+    author: 'h1-app',
+    subject: 'metaHash:$metaHash',
+    keywords: metaJson,
+  );
 
   final fontData = await rootBundle.load("assets/fonts/ipaexg.ttf");
   final ipaex = pw.Font.ttf(fontData);
@@ -221,7 +229,7 @@ Future<pw.Document> buildInvoiceDocument(Invoice invoice) async {
               pw.Container(
                 width: 50,
                 height: 50,
-                child: pw.BarcodeWidget(barcode: pw.Barcode.qrCode(), data: invoice.contentHash, drawText: false),
+                child: pw.BarcodeWidget(barcode: pw.Barcode.qrCode(), data: metaHash, drawText: false),
               ),
             ],
           ),

lib/services/product_repository.dart

@@ -8,27 +8,38 @@ class ProductRepository {
   final DatabaseHelper _dbHelper = DatabaseHelper();
   final ActivityLogRepository _logRepo = ActivityLogRepository();
 
-  Future<List<Product>> getAllProducts() async {
+  Future<List<Product>> getAllProducts({bool includeHidden = false}) async {
     final db = await _dbHelper.database;
-    final List<Map<String, dynamic>> maps = await db.query('products', orderBy: 'name ASC');
+    final String where = includeHidden ? '' : 'WHERE COALESCE(mh.is_hidden, p.is_hidden, 0) = 0';
+    final List<Map<String, dynamic>> maps = await db.rawQuery('''
+      SELECT p.*, COALESCE(mh.is_hidden, p.is_hidden, 0) AS is_hidden
+      FROM products p
+      LEFT JOIN master_hidden mh ON mh.master_type = 'product' AND mh.master_id = p.id
+      $where
+      ORDER BY ${includeHidden ? 'p.id DESC' : 'p.name ASC'}
+    ''');
 
     if (maps.isEmpty) {
       await _generateSampleProducts();
-      return getAllProducts();
+      return getAllProducts(includeHidden: includeHidden);
     }
 
     return List.generate(maps.length, (i) => Product.fromMap(maps[i]));
   }
 
-  Future<List<Product>> searchProducts(String query) async {
+  Future<List<Product>> searchProducts(String query, {bool includeHidden = false}) async {
     final db = await _dbHelper.database;
-    final List<Map<String, dynamic>> maps = await db.query(
+    final args = ['%$query%', '%$query%', '%$query%'];
-      'products',
+    final String whereHidden = includeHidden ? '' : 'AND COALESCE(mh.is_hidden, p.is_hidden, 0) = 0';
-      where: 'name LIKE ? OR barcode LIKE ? OR category LIKE ?',
+    final List<Map<String, dynamic>> maps = await db.rawQuery('''
-      whereArgs: ['%$query%', '%$query%', '%$query%'],
+      SELECT p.*, COALESCE(mh.is_hidden, p.is_hidden, 0) AS is_hidden
-      orderBy: 'name ASC',
+      FROM products p
-      limit: 50,
+      LEFT JOIN master_hidden mh ON mh.master_type = 'product' AND mh.master_id = p.id
-    );
+      WHERE (p.name LIKE ? OR p.barcode LIKE ? OR p.category LIKE ?)
+      $whereHidden
+      ORDER BY ${includeHidden ? 'p.id DESC' : 'p.name ASC'}
+      LIMIT 50
+    ''', args);
     return List.generate(maps.length, (i) => Product.fromMap(maps[i]));
   }
 
@@ -81,4 +92,23 @@ class ProductRepository {
       details: "商品を削除しました",
     );
   }
+
+  Future<void> setHidden(String id, bool hidden) async {
+    final db = await _dbHelper.database;
+    await db.insert(
+      'master_hidden',
+      {
+        'master_type': 'product',
+        'master_id': id,
+        'is_hidden': hidden ? 1 : 0,
+      },
+      conflictAlgorithm: ConflictAlgorithm.replace,
+    );
+    await _logRepo.logAction(
+      action: hidden ? "HIDE_PRODUCT" : "UNHIDE_PRODUCT",
+      targetType: "PRODUCT",
+      targetId: id,
+      details: hidden ? "商品を非表示にしました" : "商品を再表示しました",
+    );
+  }
 }

lib/services/theme_controller.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+import 'app_settings_repository.dart';
+
+class AppThemeController {
+  AppThemeController._internal();
+  static final AppThemeController instance = AppThemeController._internal();
+
+  final AppSettingsRepository _repo = AppSettingsRepository();
+  final ValueNotifier<ThemeMode> notifier = ValueNotifier<ThemeMode>(ThemeMode.system);
+
+  Future<void> load() async {
+    final theme = await _repo.getTheme();
+    notifier.value = _toMode(theme);
+  }
+
+  Future<void> setTheme(String theme) async {
+    await _repo.setTheme(theme);
+    notifier.value = _toMode(theme);
+  }
+
+  ThemeMode _toMode(String v) {
+    switch (v) {
+      case 'light':
+        return ThemeMode.light;
+      case 'dark':
+        return ThemeMode.dark;
+      default:
+        return ThemeMode.system;
+    }
+  }
+}

lib/utils/build_expiry_info.dart

@@ -0,0 +1,39 @@
+import 'package:flutter/foundation.dart';
+
+class BuildExpiryInfo {
+  BuildExpiryInfo._(this.buildTimestamp, this.lifespan, this._hasValidTimestamp);
+
+  factory BuildExpiryInfo.fromEnvironment({Duration lifespan = const Duration(days: 90)}) {
+    const rawTimestamp = String.fromEnvironment('APP_BUILD_TIMESTAMP');
+    if (rawTimestamp.isEmpty) {
+      debugPrint('[BuildExpiry] APP_BUILD_TIMESTAMP is missing; expiry guard disabled.');
+      return BuildExpiryInfo._(null, lifespan, false);
+    }
+
+    final parsed = DateTime.tryParse(rawTimestamp);
+    if (parsed == null) {
+      debugPrint('[BuildExpiry] Invalid APP_BUILD_TIMESTAMP: $rawTimestamp. Expiry guard disabled.');
+      return BuildExpiryInfo._(null, lifespan, false);
+    }
+
+    return BuildExpiryInfo._(parsed.toUtc(), lifespan, true);
+  }
+
+  final DateTime? buildTimestamp;
+  final Duration lifespan;
+  final bool _hasValidTimestamp;
+
+  bool get isEnforced => _hasValidTimestamp && buildTimestamp != null;
+
+  DateTime? get expiryTimestamp => buildTimestamp?.add(lifespan);
+
+  bool get isExpired {
+    if (!isEnforced || expiryTimestamp == null) return false;
+    return DateTime.now().toUtc().isAfter(expiryTimestamp!);
+  }
+
+  Duration? get remaining {
+    if (!isEnforced || expiryTimestamp == null) return null;
+    return expiryTimestamp!.difference(DateTime.now().toUtc());
+  }
+}

lib/widgets/contact_picker_sheet.dart

@@ -0,0 +1,127 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_contacts/flutter_contacts.dart';
+
+class ContactPickerSheet extends StatefulWidget {
+  const ContactPickerSheet({super.key, required this.contacts, this.title = '電話帳から選択'});
+
+  final List<Contact> contacts;
+  final String title;
+
+  @override
+  State<ContactPickerSheet> createState() => _ContactPickerSheetState();
+}
+
+class _ContactPickerSheetState extends State<ContactPickerSheet> {
+  late List<Contact> _filtered;
+  final TextEditingController _searchCtrl = TextEditingController();
+
+  @override
+  void initState() {
+    super.initState();
+    _filtered = widget.contacts;
+  }
+
+  @override
+  void dispose() {
+    _searchCtrl.dispose();
+    super.dispose();
+  }
+
+  void _applyFilter(String query) {
+    final lower = query.toLowerCase();
+    setState(() {
+      _filtered = widget.contacts
+          .where((contact) {
+            final org = contact.organizations.isNotEmpty ? contact.organizations.first.company : '';
+            final label = org.isNotEmpty ? org : contact.displayName;
+            return label.toLowerCase().contains(lower);
+          })
+          .toList();
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    return SafeArea(
+      top: true,
+      child: DraggableScrollableSheet(
+        expand: false,
+        initialChildSize: 0.9,
+        minChildSize: 0.6,
+        maxChildSize: 0.95,
+        builder: (context, controller) {
+          return Material(
+            color: theme.scaffoldBackgroundColor,
+            elevation: 8,
+            borderRadius: const BorderRadius.vertical(top: Radius.circular(24)),
+            child: Column(
+              children: [
+                const SizedBox(height: 12),
+                Container(
+                  width: 48,
+                  height: 4,
+                  decoration: BoxDecoration(color: Colors.grey.shade400, borderRadius: BorderRadius.circular(999)),
+                ),
+                Padding(
+                  padding: const EdgeInsets.fromLTRB(20, 16, 20, 8),
+                  child: Row(
+                    children: [
+                      Expanded(
+                        child: Text(widget.title, style: theme.textTheme.titleMedium?.copyWith(fontWeight: FontWeight.bold)),
+                      ),
+                      IconButton(
+                        tooltip: '閉じる',
+                        onPressed: () => Navigator.pop(context),
+                        icon: const Icon(Icons.close),
+                      ),
+                    ],
+                  ),
+                ),
+                Padding(
+                  padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 8),
+                  child: TextField(
+                    controller: _searchCtrl,
+                    decoration: InputDecoration(
+                      prefixIcon: const Icon(Icons.search),
+                      hintText: '会社名・氏名で検索',
+                      filled: true,
+                      fillColor: theme.colorScheme.surfaceContainerHighest.withValues(alpha: 0.4),
+                      border: OutlineInputBorder(borderRadius: BorderRadius.circular(12), borderSide: BorderSide.none),
+                    ),
+                    onChanged: _applyFilter,
+                  ),
+                ),
+                Expanded(
+                  child: _filtered.isEmpty
+                      ? const Center(child: Text('一致する連絡先が見つかりません'))
+                      : ListView.builder(
+                          controller: controller,
+                          itemCount: _filtered.length,
+                          itemBuilder: (context, index) {
+                            final contact = _filtered[index];
+                            final org = contact.organizations.isNotEmpty ? contact.organizations.first.company : '';
+                            final title = org.isNotEmpty ? org : contact.displayName;
+                            final tel = contact.phones.isNotEmpty ? contact.phones.first.number : null;
+                            final email = contact.emails.isNotEmpty ? contact.emails.first.address : null;
+                            final subtitle = [tel, email].where((v) => v != null && v.trim().isNotEmpty).join(' / ');
+                            return ListTile(
+                              title: Text(title),
+                              subtitle: subtitle.isNotEmpty ? Text(subtitle) : null,
+                              leading: CircleAvatar(
+                                backgroundColor: theme.colorScheme.primary.withValues(alpha: 0.1),
+                                child: Text(title.isNotEmpty ? title.characters.first : '?'),
+                              ),
+                              onTap: () => Navigator.pop(context, contact),
+                            );
+                          },
+                        ),
+                ),
+              ],
+            ),
+          );
+        },
+      ),
+    );
+  }
+}

lib/widgets/invoice_pdf_preview_page.dart

@@ -1,13 +1,19 @@
-import 'dart:typed_data';
 import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:crypto/crypto.dart';
 import 'package:flutter/material.dart';
-import 'package:printing/printing.dart';
+import 'package:flutter_email_sender/flutter_email_sender.dart';
-import '../models/invoice_models.dart';
-import '../services/pdf_generator.dart';
-import 'package:mailer/mailer.dart';
-import 'package:mailer/smtp_server.dart';
-import 'package:shared_preferences/shared_preferences.dart';
 import 'package:path_provider/path_provider.dart';
+import 'package:printing/printing.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../constants/mail_send_method.dart';
+import '../constants/mail_templates.dart';
+import '../models/invoice_models.dart';
+import '../services/company_profile_service.dart';
+import '../services/email_sender.dart';
+import '../services/pdf_generator.dart';
 
 class InvoicePdfPreviewPage extends StatelessWidget {
   final Invoice invoice;
@@ -39,24 +45,17 @@ class InvoicePdfPreviewPage extends StatelessWidget {
   Future<void> _sendEmail(BuildContext context) async {
     try {
       final prefs = await SharedPreferences.getInstance();
-      final host = prefs.getString('smtp_host') ?? '';
+      final mailMethod = normalizeMailSendMethod(prefs.getString(kMailSendMethodPrefKey));
-      final portStr = prefs.getString('smtp_port') ?? '587';
-      final user = prefs.getString('smtp_user') ?? '';
-      final pass = prefs.getString('smtp_pass') ?? '';
-      final useTls = prefs.getBool('smtp_tls') ?? true;
       final bccRaw = prefs.getString('smtp_bcc') ?? '';
-      final bccList = bccRaw.split(',').map((s) => s.trim()).where((s) => s.isNotEmpty).toList();
+      final bccList = EmailSender.parseBcc(bccRaw);
 
-      if (host.isEmpty || user.isEmpty || pass.isEmpty) {
+      if (bccList.isEmpty) {
         if (context.mounted) {
-          ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('SMTP設定を先に保存してください')));
+          ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('BCCは必須項目です（設定画面で登録してください）')));
         }
         return;
       }
 
-      final port = int.tryParse(portStr) ?? 587;
-      final smtpServer = SmtpServer(host, port: port, username: user, password: pass, ignoreBadCertificate: false, ssl: !useTls, allowInsecure: !useTls);
-
       final toEmail = invoice.contactEmailSnapshot ?? invoice.customer.email;
       if (toEmail == null || toEmail.isEmpty) {
         if (context.mounted) {
@@ -66,18 +65,71 @@ class InvoicePdfPreviewPage extends StatelessWidget {
       }
 
       final bytes = await _buildPdfBytes();
+      final fileName = invoice.mailAttachmentFileName;
       final tempDir = await getTemporaryDirectory();
-      final file = File('${tempDir.path}/invoice.pdf');
+      final file = File('${tempDir.path}/$fileName');
       await file.writeAsBytes(bytes, flush: true);
-      final message = Message()
+      final hash = sha256.convert(bytes).toString();
-        ..from = Address(user)
+      final headerTemplate = prefs.getString(kMailHeaderTextKey) ?? kMailHeaderTemplateDefault;
-        ..recipients = [toEmail]
+      final footerTemplate = prefs.getString(kMailFooterTextKey) ?? kMailFooterTemplateDefault;
-        ..bccRecipients = bccList
+      final placeholderMap = await CompanyProfileService().buildMailPlaceholderMap(filename: fileName, hash: hash);
-        ..subject = '請求書送付'
+      final header = applyMailTemplate(headerTemplate, placeholderMap);
-        ..text = '請求書をお送りします。ご確認ください。'
+      final footer = applyMailTemplate(footerTemplate, placeholderMap);
-        ..attachments = [FileAttachment(file)..fileName = 'invoice.pdf'..contentType = 'application/pdf'];
+      final bodyCore = invoice.mailBodyText;
+      final body = [header, bodyCore, footer].where((section) => section.trim().isNotEmpty).join('\n\n');
 
-      await send(message, smtpServer);
+      if (mailMethod == kMailSendMethodDeviceMailer) {
+        final email = Email(
+          body: body,
+          subject: fileName,
+          recipients: [toEmail],
+          bcc: bccList,
+          attachmentPaths: [file.path],
+          isHTML: false,
+        );
+        try {
+          await FlutterEmailSender.send(email);
+          await EmailSender.logDeviceMailer(success: true, toEmail: toEmail, bcc: bccList);
+        } catch (e) {
+          await EmailSender.logDeviceMailer(success: false, toEmail: toEmail, bcc: bccList, error: '$e');
+          rethrow;
+        }
+      } else {
+        final host = prefs.getString('smtp_host') ?? '';
+        final portStr = prefs.getString('smtp_port') ?? '587';
+        final user = prefs.getString('smtp_user') ?? '';
+        final passEncrypted = prefs.getString('smtp_pass') ?? '';
+        final pass = EmailSender.decrypt(passEncrypted);
+        final useTls = prefs.getBool('smtp_tls') ?? true;
+        final ignoreBadCert = prefs.getBool('smtp_ignore_bad_cert') ?? false;
+
+        if (host.isEmpty || user.isEmpty || pass.isEmpty) {
+          if (context.mounted) {
+            ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('SMTP設定を先に保存してください')));
+          }
+          return;
+        }
+
+        final port = int.tryParse(portStr) ?? 587;
+        final smtpConfig = EmailSenderConfig(
+          host: host,
+          port: port,
+          username: user,
+          password: pass,
+          useTls: useTls,
+          ignoreBadCert: ignoreBadCert,
+          bcc: bccList,
+        );
+
+        await EmailSender.sendInvoiceEmail(
+          config: smtpConfig,
+          toEmail: toEmail,
+          pdfFile: file,
+          subject: fileName,
+          attachmentFileName: fileName,
+          body: body,
+        );
+      }
       if (context.mounted) {
         ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('メール送信しました')));
       }
@@ -92,7 +144,15 @@ class InvoicePdfPreviewPage extends StatelessWidget {
   Widget build(BuildContext context) {
     final isDraft = invoice.isDraft;
     return Scaffold(
-      appBar: AppBar(title: const Text("PDFプレビュー")),
+      appBar: AppBar(
+        title: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: const [
+            Text("PDFプレビュー"),
+            Text("ScreenID: 02", style: TextStyle(fontSize: 11, color: Colors.white70)),
+          ],
+        ),
+      ),
       body: Column(
         children: [
           Expanded(
@@ -121,17 +181,28 @@ class InvoicePdfPreviewPage extends StatelessWidget {
                             }
                           : null,
                       icon: const Icon(Icons.check_circle_outline),
-                      label: const Text("正式発行"),
+                      label: Stack(
+                        alignment: Alignment.center,
+                        children: [
+                          const Text("正式発行"),
+                          if (!isDraft || isLocked)
+                            const Positioned(
+                              right: 0,
+                              child: Icon(Icons.lock, size: 16, color: Colors.white70),
+                            ),
+                        ],
+                      ),
                       style: ElevatedButton.styleFrom(backgroundColor: Colors.orange, foregroundColor: Colors.white),
                     ),
                   ),
                   const SizedBox(width: 8),
                   Expanded(
                     child: ElevatedButton.icon(
-                      onPressed: showShare
+                      onPressed: (showShare && (!isDraft || isLocked))
                           ? () async {
                               final bytes = await _buildPdfBytes();
-                              await Printing.sharePdf(bytes: bytes, filename: 'invoice.pdf');
+                              final fileName = invoice.mailAttachmentFileName;
+                              await Printing.sharePdf(bytes: bytes, filename: fileName);
                             }
                           : null,
                       icon: const Icon(Icons.share),
@@ -141,7 +212,7 @@ class InvoicePdfPreviewPage extends StatelessWidget {
                   const SizedBox(width: 8),
                   Expanded(
                     child: ElevatedButton.icon(
-                      onPressed: showEmail
+                      onPressed: (showEmail && (!isDraft || isLocked))
                           ? () async {
                               await _sendEmail(context);
                             }

pubspec.lock

@@ -190,6 +190,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.9+2"
+  flutter_email_sender:
+    dependency: "direct main"
+    description:
+      name: flutter_email_sender
+      sha256: fb515d4e073d238d0daf1d765e5318487b6396d46b96e0ae9745dbc9a133f97a
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.0.3"
   flutter_lints:
     dependency: "direct dev"
     description:

pubspec.yaml

@@ -53,6 +53,7 @@ dependencies:
   printing: ^5.14.2
   shared_preferences: ^2.2.2
   mailer: ^6.0.1
+  flutter_email_sender: ^6.0.3
 
 dev_dependencies:
   flutter_test:

scripts/build_with_expiry.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+PROJECT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+BUILD_MODE="${1:-debug}"
+
+case "${BUILD_MODE}" in
+  debug|profile|release)
+    ;;
+  *)
+    echo "Usage: $0 [debug|profile|release]" >&2
+    exit 1
+    ;;
+esac
+
+cd "${PROJECT_ROOT}"
+
+timestamp="$(date -u +"%Y-%m-%dT%H:%M:%SZ")"
+DART_DEFINE="APP_BUILD_TIMESTAMP=${timestamp}"
+
+echo "[build_with_expiry] Using timestamp: ${timestamp} (UTC)"
+echo "[build_with_expiry] Running flutter analyze..."
+flutter analyze
+
+echo "[build_with_expiry] Building APK (${BUILD_MODE})..."
+case "${BUILD_MODE}" in
+  debug)
+    flutter build apk --debug --dart-define="${DART_DEFINE}"
+    ;;
+  profile)
+    flutter build apk --profile --dart-define="${DART_DEFINE}"
+    ;;
+  release)
+    flutter build apk --release --dart-define="${DART_DEFINE}"
+    ;;
+esac
+
+echo "[build_with_expiry] Done. APK with 90-day lifespan generated."