chore: flesh out settings template and lock badges

lib/screens/invoice_detail_page.dart

@@ -150,6 +150,8 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
     final themeColor = isDraft ? Colors.blueGrey.shade800 : Colors.white;
     final textColor = isDraft ? Colors.white : Colors.black87;
 
+    final locked = _currentInvoice.isLocked;
+
     return Scaffold(
       backgroundColor: themeColor,
       appBar: AppBar(
@@ -157,6 +159,15 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
         title: Text(isDraft ? "伝票詳細 (下書き)" : "販売アシスト1号 伝票詳細"),
         backgroundColor: isDraft ? Colors.black87 : Colors.blueGrey,
         actions: [
+          if (locked)
+            Padding(
+              padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 14),
+              child: Chip(
+                label: const Text("ロック中", style: TextStyle(color: Colors.white)),
+                avatar: const Icon(Icons.lock, size: 16, color: Colors.white),
+                backgroundColor: Colors.redAccent,
+              ),
+            ),
           if (isDraft && !_isEditing)
             TextButton.icon(
               icon: const Icon(Icons.check_circle_outline, color: Colors.orangeAccent),
@@ -165,50 +176,42 @@ class _InvoiceDetailPageState extends State<InvoiceDetailPage> {
             ),
           if (!_isEditing) ...[
             IconButton(icon: const Icon(Icons.grid_on), onPressed: _exportCsv, tooltip: "CSV出力"),
-            if (widget.isUnlocked)
+            if (widget.isUnlocked && !locked)
               IconButton(
                 icon: const Icon(Icons.copy),
                 tooltip: "コピーして新規作成",
                 onPressed: () async {
-                  // 新しいIDを生成して複製
                   final newId = DateTime.now().millisecondsSinceEpoch.toString();
                   final duplicateInvoice = _currentInvoice.copyWith(
                     id: newId,
                     date: DateTime.now(),
-                    isDraft: true, // 下書きとして開始
+                    isDraft: true,
                   );
-                  
                   await Navigator.push(
                     context,
                     MaterialPageRoute(
                       builder: (context) => InvoiceInputForm(
-                        onInvoiceGenerated: (inv, path) {
+                        onInvoiceGenerated: (inv, path) {},
-                           // ここでは特に何もしない（詳細画面は元の伝票を表示し続けるため）
-                           // ただし、履歴画面に戻った時にリロードされる必要がある（HistoryScreen側で対応済み）
-                        },
                         existingInvoice: duplicateInvoice,
                       ),
                     ),
                   );
                 },
               ),
-            if (widget.isUnlocked)
+            if (widget.isUnlocked && !locked)
               IconButton(
-                icon: const Icon(Icons.edit_note), // アイコン変更
+                icon: const Icon(Icons.edit_note),
                 tooltip: "詳細編集",
                 onPressed: () async {
                   await Navigator.push(
                     context,
                     MaterialPageRoute(
                       builder: (context) => InvoiceInputForm(
-                        onInvoiceGenerated: (inv, path) {
+                        onInvoiceGenerated: (inv, path) {},
-                          // 保存完了時のコールバック（必要なら）
-                        },
                         existingInvoice: _currentInvoice,
                       ),
                     ),
                   );
-                  // 戻ってきたらデータを再読み込み（リポジトリから取得）
                   final repo = InvoiceRepository();
                   final customerRepo = CustomerRepository();
                   final customers = await customerRepo.getAllCustomers();

lib/screens/invoice_history_screen.dart

@@ -297,17 +297,26 @@ class _InvoiceHistoryScreenState extends State<InvoiceHistoryScreen> {
                               backgroundColor: invoice.isDraft 
                                   ? Colors.orange.shade100 
                                   : (_isUnlocked ? Colors.indigo.shade100 : Colors.grey.shade200),
-                              child: Icon(
+                              child: Stack(
-                                invoice.isDraft ? Icons.edit_note : Icons.description_outlined,
+                                children: [
-                                color: invoice.isDraft 
+                                  Align(
-                                    ? Colors.orange 
+                                    alignment: Alignment.center,
-                                    : (_isUnlocked ? Colors.indigo : Colors.grey),
+                                    child: Icon(
+                                      invoice.isDraft ? Icons.edit_note : Icons.description_outlined,
+                                      color: invoice.isDraft 
+                                          ? Colors.orange 
+                                          : (_isUnlocked ? Colors.indigo : Colors.grey),
+                                    ),
+                                  ),
+                                  if (invoice.isLocked)
+                                    const Align(alignment: Alignment.bottomRight, child: Icon(Icons.lock, size: 14, color: Colors.redAccent)),
+                                ],
                               ),
                             ),
                             title: Column(
                               crossAxisAlignment: CrossAxisAlignment.start,
                               children: [
-                                Text(invoice.customerNameForDisplay, style: const TextStyle(fontWeight: FontWeight.bold)),
+                                Text(invoice.customerNameForDisplay, style: TextStyle(fontWeight: FontWeight.bold, color: invoice.isLocked ? Colors.grey : Colors.black87)),
                                 if (invoice.subject?.isNotEmpty ?? false)
                                   Text(
                                     invoice.subject!,
@@ -343,6 +352,10 @@ class _InvoiceHistoryScreenState extends State<InvoiceHistoryScreen> {
                               _loadData();
                             },
                             onLongPress: () async {
+                              if (invoice.isLocked) {
+                                ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text("ロック中の伝票は削除できません")));
+                                return;
+                              }
                               if (!_isUnlocked) {
                                 ScaffoldMessenger.of(context).showSnackBar(
                                   const SnackBar(content: Text("削除するにはアンロックが必要です")),

lib/screens/settings_screen.dart

@@ -1,103 +1,228 @@
 import 'package:flutter/material.dart';
 import 'company_info_screen.dart';
 
-class SettingsScreen extends StatelessWidget {
+class SettingsScreen extends StatefulWidget {
   const SettingsScreen({super.key});
 
-  void _showPlaceholder(BuildContext context, String title) {
+  @override
-    ScaffoldMessenger.of(context).showSnackBar(
+  State<SettingsScreen> createState() => _SettingsScreenState();
-      SnackBar(content: Text('$title の設定は後で追加してください')),
+}
-    );
+
+class _SettingsScreenState extends State<SettingsScreen> {
+  // Company
+  final _companyNameCtrl = TextEditingController();
+  final _companyZipCtrl = TextEditingController();
+  final _companyAddrCtrl = TextEditingController();
+  final _companyTelCtrl = TextEditingController();
+  final _companyRegCtrl = TextEditingController();
+
+  // Staff
+  final _staffNameCtrl = TextEditingController();
+  final _staffMailCtrl = TextEditingController();
+
+  // SMTP
+  final _smtpHostCtrl = TextEditingController();
+  final _smtpPortCtrl = TextEditingController(text: '587');
+  final _smtpUserCtrl = TextEditingController();
+  final _smtpPassCtrl = TextEditingController();
+  bool _smtpTls = true;
+
+  // Backup
+  final _backupPathCtrl = TextEditingController();
+
+  String _theme = 'system';
+
+  @override
+  void dispose() {
+    _companyNameCtrl.dispose();
+    _companyZipCtrl.dispose();
+    _companyAddrCtrl.dispose();
+    _companyTelCtrl.dispose();
+    _companyRegCtrl.dispose();
+    _staffNameCtrl.dispose();
+    _staffMailCtrl.dispose();
+    _smtpHostCtrl.dispose();
+    _smtpPortCtrl.dispose();
+    _smtpUserCtrl.dispose();
+    _smtpPassCtrl.dispose();
+    _backupPathCtrl.dispose();
+    super.dispose();
   }
 
-  void _showThemePicker(BuildContext context) {
+  void _showSnackbar(String msg) {
-    showModalBottomSheet(
+    ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(msg)));
-      context: context,
-      shape: const RoundedRectangleBorder(borderRadius: BorderRadius.vertical(top: Radius.circular(16))),
-      builder: (context) => Padding(
-        padding: const EdgeInsets.all(16),
-        child: Column(
-          mainAxisSize: MainAxisSize.min,
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            const Text('テーマ選択', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 16)),
-            const SizedBox(height: 12),
-            ListTile(
-              leading: const Icon(Icons.brightness_5),
-              title: const Text('ライト'),
-              onTap: () {
-                Navigator.pop(context);
-                _showPlaceholder(context, 'ライトテーマ適用');
-              },
-            ),
-            ListTile(
-              leading: const Icon(Icons.brightness_3),
-              title: const Text('ダーク'),
-              onTap: () {
-                Navigator.pop(context);
-                _showPlaceholder(context, 'ダークテーマ適用');
-              },
-            ),
-            ListTile(
-              leading: const Icon(Icons.brightness_auto),
-              title: const Text('システムに従う'),
-              onTap: () {
-                Navigator.pop(context);
-                _showPlaceholder(context, 'システムテーマ適用');
-              },
-            ),
-          ],
-        ),
-      ),
-    );
   }
 
+  void _saveCompany() => _showSnackbar('自社情報を保存（テンプレ）');
+  void _saveStaff() => _showSnackbar('担当者情報を保存（テンプレ）');
+  void _saveSmtp() => _showSnackbar('SMTP設定を保存（テンプレ）');
+  void _saveBackup() => _showSnackbar('バックアップ設定を保存（テンプレ）');
+
+  void _pickBackupPath() => _showSnackbar('バックアップ先の選択は後で実装');
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         title: const Text('設定'),
+        actions: [
+          IconButton(
+            icon: const Icon(Icons.info_outline),
+            onPressed: () => _showSnackbar('設定はテンプレ実装です。実際の保存は未実装'),
+          )
+        ],
       ),
       body: ListView(
+        padding: const EdgeInsets.all(16),
         children: [
-          ListTile(
+          _section(
-            leading: const Icon(Icons.business),
+            title: '自社情報',
-            title: const Text('自社情報'),
+            subtitle: '会社名・住所・登録番号など',
-            subtitle: const Text('会社名・住所・登録番号など'),
+            child: Column(
-            onTap: () async {
+              children: [
-              await Navigator.push(context, MaterialPageRoute(builder: (context) => const CompanyInfoScreen()));
+                TextField(controller: _companyNameCtrl, decoration: const InputDecoration(labelText: '会社名')),
-            },
+                TextField(controller: _companyZipCtrl, decoration: const InputDecoration(labelText: '郵便番号')),
+                TextField(controller: _companyAddrCtrl, decoration: const InputDecoration(labelText: '住所')),
+                TextField(controller: _companyTelCtrl, decoration: const InputDecoration(labelText: '電話番号')),
+                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),
+                      label: const Text('画面で編集'),
+                      onPressed: () async {
+                        await Navigator.push(context, MaterialPageRoute(builder: (context) => const CompanyInfoScreen()));
+                      },
+                    ),
+                    const SizedBox(width: 8),
+                    ElevatedButton.icon(
+                      icon: const Icon(Icons.save),
+                      label: const Text('保存'),
+                      onPressed: _saveCompany,
+                    ),
+                  ],
+                ),
+              ],
+            ),
           ),
-          const Divider(height: 1),
+          _section(
-          ListTile(
+            title: '担当者情報',
-            leading: const Icon(Icons.badge_outlined),
+            subtitle: '署名や連絡先（送信者情報）',
-            title: const Text('担当者情報'),
+            child: Column(
-            subtitle: const Text('自社担当者の署名・連絡先'),
+              children: [
-            onTap: () => _showPlaceholder(context, '担当者情報'),
+                TextField(controller: _staffNameCtrl, decoration: const InputDecoration(labelText: '担当者名')),
+                TextField(controller: _staffMailCtrl, decoration: const InputDecoration(labelText: 'メールアドレス')),
+                const SizedBox(height: 8),
+                ElevatedButton.icon(
+                  icon: const Icon(Icons.save),
+                  label: const Text('保存'),
+                  onPressed: _saveStaff,
+                ),
+              ],
+            ),
           ),
-          const Divider(height: 1),
+          _section(
-          ListTile(
+            title: 'SMTP情報',
-            leading: const Icon(Icons.email_outlined),
+            subtitle: 'メール送信サーバ設定（テンプレ）',
-            title: const Text('SMTP情報'),
+            child: Column(
-            subtitle: const Text('メール送信サーバ設定'),
+              children: [
-            onTap: () => _showPlaceholder(context, 'SMTP情報'),
+                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),
+                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,
+                ),
+              ],
+            ),
           ),
-          const Divider(height: 1),
+          _section(
-          ListTile(
+            title: 'バックアップドライブ',
-            leading: const Icon(Icons.cloud_upload_outlined),
+            subtitle: 'バックアップ先のクラウド/ローカル',
-            title: const Text('バックアップドライブ'),
+            child: Column(
-            subtitle: const Text('バックアップ先のクラウド/ローカルドライブ'),
+              children: [
-            onTap: () => _showPlaceholder(context, 'バックアップドライブ'),
+                TextField(controller: _backupPathCtrl, decoration: const InputDecoration(labelText: '保存先パス/URL')), 
+                const SizedBox(height: 8),
+                Row(
+                  children: [
+                    OutlinedButton.icon(
+                      icon: const Icon(Icons.folder_open),
+                      label: const Text('参照'),
+                      onPressed: _pickBackupPath,
+                    ),
+                    const SizedBox(width: 8),
+                    ElevatedButton.icon(
+                      icon: const Icon(Icons.save),
+                      label: const Text('保存'),
+                      onPressed: _saveBackup,
+                    ),
+                  ],
+                ),
+              ],
+            ),
           ),
-          const Divider(height: 1),
+          _section(
-          ListTile(
+            title: 'テーマ選択',
-            leading: const Icon(Icons.palette_outlined),
+            subtitle: '配色や見た目を切り替え（テンプレ）',
-            title: const Text('テーマ選択'),
+            child: Column(
-            subtitle: const Text('配色や見た目を切り替え'),
+              children: [
-            onTap: () => _showThemePicker(context),
+                RadioListTile<String>(
+                  value: 'light',
+                  groupValue: _theme,
+                  title: const Text('ライト'),
+                  onChanged: (v) => setState(() => _theme = v ?? 'light'),
+                ),
+                RadioListTile<String>(
+                  value: 'dark',
+                  groupValue: _theme,
+                  title: const Text('ダーク'),
+                  onChanged: (v) => setState(() => _theme = v ?? 'dark'),
+                ),
+                RadioListTile<String>(
+                  value: 'system',
+                  groupValue: _theme,
+                  title: const Text('システムに従う'),
+                  onChanged: (v) => setState(() => _theme = v ?? 'system'),
+                ),
+                const SizedBox(height: 8),
+                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'),
+                ),
+              ],
+            ),
           ),
         ],
       ),
     );
   }
+
+  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,
+          ],
+        ),
+      ),
+    );
+  }
 }