feat: add lock flags and refresh theme

lib/main.dart

@@ -22,9 +22,43 @@ class MyApp extends StatelessWidget {
     return MaterialApp(
       title: '販売アシスト1号',
       theme: ThemeData(
-        primarySwatch: Colors.blueGrey,
+        colorScheme: ColorScheme.fromSeed(seedColor: Colors.indigo.shade700).copyWith(
+          primary: Colors.indigo.shade700,
+          secondary: Colors.deepOrange.shade400,
+          surface: Colors.grey.shade50,
+          onSurface: Colors.blueGrey.shade900,
+        ),
+        scaffoldBackgroundColor: Colors.grey.shade50,
+        appBarTheme: AppBarTheme(
+          backgroundColor: Colors.indigo.shade700,
+          foregroundColor: Colors.white,
+          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),
+          ),
+        ),
+        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',
       ),
       home: const InvoiceHistoryScreen(),
     );
@@ -54,54 +88,20 @@ class _InvoiceFlowScreenState extends State<InvoiceFlowScreen> {
 
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
+    // 入力フォーム自身が Scaffold を持つため、ここではそのまま返す
-      appBar: AppBar(
+    return InvoiceInputForm(
-        leading: const BackButton(),
+      onInvoiceGenerated: (invoice, path) async {
-        title: const Text("販売アシスト1号 V1.5.02"),
+        // GPSの記録を試みる
-        backgroundColor: Colors.blueGrey,
+        final locationService = LocationService();
-      ),
+        final position = await locationService.getCurrentLocation();
-      drawer: Drawer(
+        if (position != null) {
-        child: ListView(
+          final customerRepo = CustomerRepository();
-          padding: EdgeInsets.zero,
+          await customerRepo.addGpsHistory(invoice.customer.id, position.latitude, position.longitude);
-          children: [
+          debugPrint("GPS recorded for customer ${invoice.customer.id}");
-            const DrawerHeader(
+        }
-              decoration: BoxDecoration(color: Colors.blueGrey),
+        _handleInvoiceGenerated(invoice, path);
-              child: Text("メニュー", style: TextStyle(color: Colors.white, fontSize: 24)),
+        if (widget.onComplete != null) widget.onComplete!();
-            ),
+      },
-            ListTile(
-              leading: const Icon(Icons.add_task),
-              title: const Text("新規伝票作成"),
-              onTap: () => Navigator.pop(context),
-            ),
-            ListTile(
-              leading: const Icon(Icons.history),
-              title: const Text("伝票履歴"),
-              onTap: () {
-                Navigator.pop(context);
-                Navigator.push(
-                  context,
-                  MaterialPageRoute(builder: (context) => const InvoiceHistoryScreen()),
-                );
-              },
-            ),
-          ],
-        ),
-      ),
-      // 入力フォームを表示
-      body: InvoiceInputForm(
-        onInvoiceGenerated: (invoice, path) async {
-          // GPSの記録を試みる
-          final locationService = LocationService();
-          final position = await locationService.getCurrentLocation();
-          if (position != null) {
-            final customerRepo = CustomerRepository();
-            await customerRepo.addGpsHistory(invoice.customer.id, position.latitude, position.longitude);
-            debugPrint("GPS recorded for customer ${invoice.customer.id}");
-          }
-          _handleInvoiceGenerated(invoice, path);
-          if (widget.onComplete != null) widget.onComplete!();
-        },
-      ),
     );
   }
 }

lib/models/customer_model.dart

@@ -10,6 +10,7 @@ class Customer {
   final String? odooId;     // Odoo側のID
   final bool isSynced;      // 同期フラグ
   final DateTime updatedAt; // 最終更新日時
+  final bool isLocked;      // ロック
 
   Customer({
     required this.id,
@@ -22,6 +23,7 @@ class Customer {
     this.odooId,
     this.isSynced = false,
     DateTime? updatedAt,
+    this.isLocked = false,
   }) : updatedAt = updatedAt ?? DateTime.now();
 
   String get invoiceName {
@@ -42,6 +44,7 @@ class Customer {
       'address': address,
       'tel': tel,
       'odoo_id': odooId,
+      'is_locked': isLocked ? 1 : 0,
       'is_synced': isSynced ? 1 : 0,
       'updated_at': updatedAt.toIso8601String(),
     };
@@ -57,6 +60,7 @@ class Customer {
       address: map['address'],
       tel: map['tel'],
       odooId: map['odoo_id'],
+      isLocked: (map['is_locked'] ?? 0) == 1,
       isSynced: map['is_synced'] == 1,
       updatedAt: DateTime.parse(map['updated_at']),
     );
@@ -73,6 +77,7 @@ class Customer {
     String? odooId,
     bool? isSynced,
     DateTime? updatedAt,
+    bool? isLocked,
   }) {
     return Customer(
       id: id ?? this.id,
@@ -85,6 +90,7 @@ class Customer {
       odooId: odooId ?? this.odooId,
       isSynced: isSynced ?? this.isSynced,
       updatedAt: updatedAt ?? this.updatedAt,
+      isLocked: isLocked ?? this.isLocked,
     );
   }
 }

lib/models/invoice_models.dart

@@ -83,6 +83,7 @@ class Invoice {
   final String terminalId; // 追加: 端末識別子
   final bool isDraft; // 追加: 下書きフラグ
   final String? subject; // 追加: 案件名
+  final bool isLocked; // 追加: ロック
 
   Invoice({
     String? id,
@@ -102,6 +103,7 @@ class Invoice {
     String? terminalId, // 追加
     this.isDraft = false, // 追加: デフォルトは通常
     this.subject, // 追加: 案件
+    this.isLocked = false,
   })  : id = id ?? DateTime.now().millisecondsSinceEpoch.toString(),
         terminalId = terminalId ?? "T1", // デフォルト端末ID
         updatedAt = updatedAt ?? DateTime.now();
@@ -160,6 +162,7 @@ class Invoice {
       'content_hash': contentHash, // 追加
       'is_draft': isDraft ? 1 : 0, // 追加
       'subject': subject, // 追加
+      'is_locked': isLocked ? 1 : 0,
     };
   }
 
@@ -181,6 +184,7 @@ class Invoice {
     String? terminalId,
     bool? isDraft,
     String? subject,
+    bool? isLocked,
   }) {
     return Invoice(
       id: id ?? this.id,
@@ -200,6 +204,7 @@ class Invoice {
       terminalId: terminalId ?? this.terminalId,
       isDraft: isDraft ?? this.isDraft,
       subject: subject ?? this.subject,
+      isLocked: isLocked ?? this.isLocked,
     );
   }
 

lib/models/product_model.dart

@@ -6,6 +6,7 @@ class Product {
   final String? category;
   final int stockQuantity; // 追加
   final String? odooId;
+  final bool isLocked; // ロック
 
   Product({
     required this.id,
@@ -15,6 +16,7 @@ class Product {
     this.category,
     this.stockQuantity = 0, // 追加
     this.odooId,
+    this.isLocked = false,
   });
 
   Map<String, dynamic> toMap() {
@@ -25,6 +27,7 @@ class Product {
       'barcode': barcode,
       'category': category,
       'stock_quantity': stockQuantity, // 追加
+      'is_locked': isLocked ? 1 : 0,
       'odoo_id': odooId,
     };
   }
@@ -37,6 +40,7 @@ class Product {
       barcode: map['barcode'],
       category: map['category'],
       stockQuantity: map['stock_quantity'] ?? 0, // 追加
+      isLocked: (map['is_locked'] ?? 0) == 1,
       odooId: map['odoo_id'],
     );
   }
@@ -47,12 +51,14 @@ class Product {
     int? defaultUnitPrice,
     String? barcode,
     String? odooId,
+    bool? isLocked,
   }) {
     return Product(
       id: id ?? this.id,
       name: name ?? this.name,
       defaultUnitPrice: defaultUnitPrice ?? this.defaultUnitPrice,
       odooId: odooId ?? this.odooId,
+      isLocked: isLocked ?? this.isLocked,
     );
   }
 }

lib/screens/invoice_history_screen.dart

@@ -327,6 +327,7 @@ class _InvoiceHistoryScreenState extends State<InvoiceHistoryScreen> {
         label: const Text("新規伝票作成"),
         icon: const Icon(Icons.add),
         backgroundColor: Colors.indigo,
+        foregroundColor: Colors.white,
       ),
     );
   }

lib/screens/invoice_input_screen.dart

@@ -129,24 +129,31 @@ class _InvoiceInputFormState extends State<InvoiceInputForm> {
     );
 
     setState(() => _isSaving = true);
-    
+    try {
-    // PDF生成有無に関わらず、まずは保存
+      // PDF生成有無に関わらず、まずは保存
-    if (generatePdf) {
+      if (generatePdf) {
-      setState(() => _status = "PDFを生成中...");
+        setState(() => _status = "PDFを生成中...");
-      final path = await generateInvoicePdf(invoice);
+        final path = await generateInvoicePdf(invoice);
-      if (path != null) {
+        if (path != null) {
-        final updatedInvoice = invoice.copyWith(filePath: path);
+          final updatedInvoice = invoice.copyWith(filePath: path);
-        await _repository.saveInvoice(updatedInvoice);
+          await _repository.saveInvoice(updatedInvoice);
-        if (mounted) widget.onInvoiceGenerated(updatedInvoice, path);
+          if (mounted) widget.onInvoiceGenerated(updatedInvoice, path);
-        if (mounted) ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text("伝票を保存し、PDFを生成しました")));
+          if (mounted) ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text("伝票を保存し、PDFを生成しました")));
+        } else {
+          if (mounted) ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text("PDF生成に失敗しました")));
+        }
+      } else {
+        await _repository.saveInvoice(invoice);
+        if (mounted) ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text("伝票を保存しました（PDF未生成）")));
+        if (mounted) Navigator.pop(context);
       }
-    } else {
+    } catch (e) {
-      await _repository.saveInvoice(invoice);
+      if (mounted) {
-      if (mounted) ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text("伝票を保存しました（PDF未生成）")));
+        ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('保存に失敗しました: $e')));
-      if (mounted) Navigator.pop(context);
+      }
+    } finally {
+      if (mounted) setState(() => _isSaving = false);
     }
-    
-    if (mounted) setState(() => _isSaving = false);
   }
 
   void _showPreview() {
@@ -202,7 +209,7 @@ class _InvoiceInputFormState extends State<InvoiceInputForm> {
       backgroundColor: themeColor,
       appBar: AppBar(
         leading: const BackButton(),
-        title: Text(_isDraft ? "伝票作成 (下書き)" : "販売アシスト1号 V1.5.05"),
+        title: Text(_isDraft ? "伝票作成 (下書き)" : "販売アシスト1号 V1.5.06"),
         backgroundColor: _isDraft ? Colors.black87 : Colors.blueGrey,
       ),
       body: Stack(
@@ -374,102 +381,98 @@ class _InvoiceInputFormState extends State<InvoiceInputForm> {
             child: Center(child: Text("商品が追加されていません", style: TextStyle(color: Colors.grey))),
           )
         else
-          ..._items.asMap().entries.map((entry) {
+          ReorderableListView.builder(
-            final idx = entry.key;
+            shrinkWrap: true,
-            final item = entry.value;
+            physics: const NeverScrollableScrollPhysics(),
-            return Card(
+            itemCount: _items.length,
-              margin: const EdgeInsets.only(bottom: 8),
+            onReorder: (oldIndex, newIndex) {
-              child: ListTile(
+              setState(() {
-                title: Text(item.description),
+                if (newIndex > oldIndex) newIndex -= 1;
-                subtitle: Text("￥${fmt.format(item.unitPrice)} x ${item.quantity}"),
+                final item = _items.removeAt(oldIndex);
-                trailing: Row(
+                _items.insert(newIndex, item);
-                  mainAxisSize: MainAxisSize.min,
+              });
-                  children: [
+            },
-                    Text("￥${fmt.format(item.unitPrice * item.quantity)}", style: const TextStyle(fontWeight: FontWeight.bold)),
+            buildDefaultDragHandles: false,
-                    const SizedBox(width: 8),
+            itemBuilder: (context, idx) {
-                    if (idx > 0)
+              final item = _items[idx];
-                      IconButton(
+              return ReorderableDelayedDragStartListener(
-                        icon: const Icon(Icons.arrow_upward, size: 20),
+                key: ValueKey('item_${idx}_${item.description}'),
-                        onPressed: () => setState(() {
+                index: idx,
-                          final temp = _items[idx];
+                child: Card(
-                          _items[idx] = _items[idx - 1];
+                  margin: const EdgeInsets.only(bottom: 8),
-                          _items[idx - 1] = temp;
+                  child: ListTile(
-                        }),
+                    title: Text(item.description),
-                        tooltip: "上へ",
+                    subtitle: Text("￥${fmt.format(item.unitPrice)} x ${item.quantity}"),
-                      ),
+                    trailing: Row(
-                    if (idx < _items.length - 1)
+                      mainAxisSize: MainAxisSize.min,
-                      IconButton(
+                      children: [
-                        icon: const Icon(Icons.arrow_downward, size: 20),
+                        Text("￥${fmt.format(item.unitPrice * item.quantity)}", style: const TextStyle(fontWeight: FontWeight.bold)),
-                        onPressed: () => setState(() {
+                        const SizedBox(width: 8),
-                          final temp = _items[idx];
+                        IconButton(
-                          _items[idx] = _items[idx + 1];
+                          icon: const Icon(Icons.remove_circle_outline, color: Colors.redAccent),
-                          _items[idx + 1] = temp;
+                          onPressed: () => setState(() => _items.removeAt(idx)),
-                        }),
+                          tooltip: "削除",
-                        tooltip: "下へ",
-                      ),
-                    IconButton(
-                      icon: const Icon(Icons.remove_circle_outline, color: Colors.redAccent),
-                      onPressed: () => setState(() => _items.removeAt(idx)),
-                      tooltip: "削除",
-                    ),
-                  ],
-                ),
-                onTap: () {
-                  // 簡易編集ダイアログ
-                  final descCtrl = TextEditingController(text: item.description);
-                  final qtyCtrl = TextEditingController(text: item.quantity.toString());
-                  final priceCtrl = TextEditingController(text: item.unitPrice.toString());
-                  showDialog(
-                    context: context,
-                    builder: (context) => AlertDialog(
-                      title: const Text("明細の編集"),
-                      content: Column(
-                        mainAxisSize: MainAxisSize.min,
-                        children: [
-                          TextField(controller: descCtrl, decoration: const InputDecoration(labelText: "品名 / 項目")),
-                          TextField(controller: qtyCtrl, decoration: const InputDecoration(labelText: "数量"), keyboardType: TextInputType.number),
-                          TextField(controller: priceCtrl, decoration: const InputDecoration(labelText: "単価"), keyboardType: TextInputType.number),
-                        ],
-                      ),
-                      actions: [
-                        TextButton.icon(
-                          icon: const Icon(Icons.search, size: 18),
-                          label: const Text("マスター参照"),
-                          onPressed: () {
-                             showModalBottomSheet(
-                               context: context,
-                               isScrollControlled: true,
-                               builder: (context) => ProductPickerModal(
-                                 onItemSelected: (selected) {
-                                   descCtrl.text = selected.description;
-                                   priceCtrl.text = selected.unitPrice.toString();
-                                   Navigator.pop(context); // close picker
-                                 },
-                               ),
-                             );
-                          },
-                        ),
-                        TextButton(onPressed: () => Navigator.pop(context), child: const Text("キャンセル")),
-                        ElevatedButton(
-                          onPressed: () {
-                            setState(() {
-                              _items[idx] = item.copyWith(
-                                description: descCtrl.text,
-                                quantity: int.tryParse(qtyCtrl.text) ?? item.quantity,
-                                unitPrice: int.tryParse(priceCtrl.text) ?? item.unitPrice,
-                              );
-                            });
-                            Navigator.pop(context);
-                          },
-                          child: const Text("更新"),
                         ),
                       ],
                     ),
-                  );
+                    onTap: () {
-                },
+                      // 簡易編集ダイアログ
-              ),
+                      final descCtrl = TextEditingController(text: item.description);
-            );
+                      final qtyCtrl = TextEditingController(text: item.quantity.toString());
-          }),
+                      final priceCtrl = TextEditingController(text: item.unitPrice.toString());
+                      showDialog(
+                        context: context,
+                        builder: (context) => AlertDialog(
+                          title: const Text("明細の編集"),
+                          content: Column(
+                            mainAxisSize: MainAxisSize.min,
+                            children: [
+                              TextField(controller: descCtrl, decoration: const InputDecoration(labelText: "品名 / 項目")),
+                              TextField(controller: qtyCtrl, decoration: const InputDecoration(labelText: "数量"), keyboardType: TextInputType.number),
+                              TextField(controller: priceCtrl, decoration: const InputDecoration(labelText: "単価"), keyboardType: TextInputType.number),
+                            ],
+                          ),
+                          actions: [
+                            TextButton.icon(
+                              icon: const Icon(Icons.search, size: 18),
+                              label: const Text("マスター参照"),
+                              onPressed: () {
+                                 showModalBottomSheet(
+                                   context: context,
+                                   isScrollControlled: true,
+                                   builder: (context) => ProductPickerModal(
+                                     onItemSelected: (selected) {
+                                       descCtrl.text = selected.description;
+                                       priceCtrl.text = selected.unitPrice.toString();
+                                       Navigator.pop(context); // close picker
+                                     },
+                                   ),
+                                 );
+                              },
+                            ),
+                            TextButton(onPressed: () => Navigator.pop(context), child: const Text("キャンセル")),
+                            ElevatedButton(
+                              onPressed: () {
+                                setState(() {
+                                  _items[idx] = item.copyWith(
+                                    description: descCtrl.text,
+                                    quantity: int.tryParse(qtyCtrl.text) ?? item.quantity,
+                                    unitPrice: int.tryParse(priceCtrl.text) ?? item.unitPrice,
+                                  );
+                                });
+                                Navigator.pop(context);
+                              },
+                              child: const Text("更新"),
+                            ),
+                          ],
+                        ),
+                      );
+                    },
+                  ),
+                ),
+              );
+            },
+          ),
       ],
     );
   }

lib/services/database_helper.dart

@@ -2,7 +2,7 @@ import 'package:sqflite/sqflite.dart';
 import 'package:path/path.dart';
 
 class DatabaseHelper {
-  static const _databaseVersion = 13;
+  static const _databaseVersion = 15;
   static final DatabaseHelper _instance = DatabaseHelper._internal();
   static Database? _database;
 
@@ -97,6 +97,14 @@ class DatabaseHelper {
     if (oldVersion < 13) {
       await db.execute('ALTER TABLE company_info ADD COLUMN registration_number TEXT');
     }
+    if (oldVersion < 14) {
+      await _safeAddColumn(db, 'invoices', 'subject TEXT');
+    }
+    if (oldVersion < 15) {
+      await _safeAddColumn(db, 'invoices', 'is_locked INTEGER DEFAULT 0');
+      await _safeAddColumn(db, 'customers', 'is_locked INTEGER DEFAULT 0');
+      await _safeAddColumn(db, 'products', 'is_locked INTEGER DEFAULT 0');
+    }
   }
 
   Future<void> _onCreate(Database db, int version) async {
@@ -110,6 +118,7 @@ class DatabaseHelper {
         address TEXT,
         tel TEXT,
         odoo_id TEXT,
+        is_locked INTEGER DEFAULT 0,
         is_synced INTEGER DEFAULT 0,
         updated_at TEXT NOT NULL
       )
@@ -135,6 +144,7 @@ class DatabaseHelper {
         barcode TEXT,
         category TEXT,
         stock_quantity INTEGER DEFAULT 0,
+        is_locked INTEGER DEFAULT 0,
         odoo_id TEXT
       )
     ''');
@@ -148,6 +158,7 @@ class DatabaseHelper {
         customer_id TEXT NOT NULL,
         date TEXT NOT NULL,
         notes TEXT,
+        subject TEXT,
         file_path TEXT,
         total_amount INTEGER,
         tax_rate REAL DEFAULT 0.10,
@@ -161,6 +172,7 @@ class DatabaseHelper {
         terminal_id TEXT DEFAULT "T1",
         content_hash TEXT,
         is_draft INTEGER DEFAULT 0,
+        is_locked INTEGER DEFAULT 0,
         FOREIGN KEY (customer_id) REFERENCES customers (id)
       )
     ''');
@@ -212,4 +224,12 @@ class DatabaseHelper {
       )
     ''');
   }
+
+  Future<void> _safeAddColumn(Database db, String table, String columnDef) async {
+    try {
+      await db.execute('ALTER TABLE ' + table + ' ADD COLUMN ' + columnDef);
+    } catch (_) {
+      // Ignore if the column already exists.
+    }
+  }
 }

lib/services/invoice_repository.dart

@@ -13,6 +13,9 @@ class InvoiceRepository {
   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 Invoice toSave = invoice.isDraft ? invoice : invoice.copyWith(isLocked: true);
+
     await db.transaction((txn) async {
       // 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）
       final List<Map<String, dynamic>> oldItems = await txn.query(
@@ -34,7 +37,7 @@ class InvoiceRepository {
       // 伝票ヘッダーの保存
       await txn.insert(
         'invoices',
-        invoice.toMap(),
+        toSave.toMap(),
         conflictAlgorithm: ConflictAlgorithm.replace,
       );
 
@@ -53,8 +56,16 @@ class InvoiceRepository {
             'UPDATE products SET stock_quantity = stock_quantity - ? WHERE id = ?',
             [item.quantity, item.productId],
           );
+          if (!invoice.isDraft) {
+            await txn.execute('UPDATE products SET is_locked = 1 WHERE id = ?', [item.productId]);
+          }
         }
       }
+
+      // 顧客をロック
+      if (!invoice.isDraft) {
+        await txn.execute('UPDATE customers SET is_locked = 1 WHERE id = ?', [invoice.customer.id]);
+      }
     });
 
     await _logRepo.logAction(
@@ -114,6 +125,7 @@ class InvoiceRepository {
         terminalId: iMap['terminal_id'] ?? "T1",
         isDraft: (iMap['is_draft'] ?? 0) == 1,
         subject: iMap['subject'],
+        isLocked: (iMap['is_locked'] ?? 0) == 1,
       ));
     }
     return invoices;

lib/widgets/slide_to_unlock.dart

@@ -18,7 +18,7 @@ class SlideToUnlock extends StatefulWidget {
 
 class _SlideToUnlockState extends State<SlideToUnlock> {
   double _position = 0.0;
-  final double _thumbSize = 50.0;
+  final double _thumbSize = 56.0;
 
   @override
   Widget build(BuildContext context) {
@@ -27,7 +27,7 @@ class _SlideToUnlockState extends State<SlideToUnlock> {
     return LayoutBuilder(
       builder: (context, constraints) {
         final double maxWidth = constraints.maxWidth;
-        final double trackWidth = maxWidth - _thumbSize - 8; // 余白を考慮
+        final double trackWidth = (maxWidth - _thumbSize - 12).clamp(0, maxWidth);
 
         return Container(
           height: 64,
@@ -81,7 +81,7 @@ class _SlideToUnlockState extends State<SlideToUnlock> {
                     }
                   },
                   child: Container(
-                    width: maxWidth * 0.25, // 少し横長に
+                    width: _thumbSize,
                     height: 56,
                     decoration: BoxDecoration(
                       gradient: const LinearGradient(