最初

.gitignore

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+.env
+.venv/
+__pycache__/
+sales.db
+__init__.py

README.md

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+# 販売アシスト1号
+
+Python + Fletで開発したAndroid対応販売管理アプリケーションです。
+
+## 機能
+
+- **ダッシュボード**: 顧客数、商品数、売上件数、総売上を表示
+- **顧客管理**: 顧客情報の追加、編集、削除
+- **商品管理**: 商品情報の追加、編集、削除、在庫管理
+- **売上管理**: 売上データの記録と閲覧
+- **データ出力**: JSON/CSV形式でのデータエクスポート
+- **電子帳簿保存法対応**: 10年間データ保持、監査証跡、整合性チェック
+
+## 電子帳簿保存法対応
+
+- **10年間データ保持**: 法定期間のデータ保存に対応
+- **監査証跡**: 全データ操作のログ記録
+- **データ整合性**: チェックサムによる改ざん検知
+- **アーカイブ機能**: 7年以上前のデータを自動アーカイブ
+- **コンプライアンスレポート**: 法令対応状況の定期報告
+
+## セットアップ
+
+1. 依存関係をインストール:
+```bash
+pip install -r requirements.txt
+```
+
+2. アプリケーションを実行:
+```bash
+python main.py
+```
+
+## Androidビルド
+
+Fletを使用してAndroidアプリをビルド:
+
+```bash
+python build.py
+```
+
+または直接実行:
+```bash
+flet pack main.py --android
+```
+
+## データベース
+
+アプリケーションはSQLiteデータベース(`sales.db`)を使用してデータを保存します。
+
+- `customers`: 顧客情報
+- `products`: 商品情報  
+- `sales`: 売上データ
+- `audit_logs`: 監査ログ
+- `integrity_checks`: 整合性チェック記録
+- `archive_sales`: アーカイブ済み売上データ
+
+## 使用方法
+
+1. アプリを起動するとダッシュボードが表示されます
+2. 左側のナビゲーションレールで各機能にアクセス
+3. 各画面で「追加」ボタンから新しいデータを登録
+4. 編集・削除ボタンで既存データを管理
+5. 「データ出力」でバックアップ作成
+6. 「コンプライアンス」で法令対応管理
+
+## 電子帳簿保存法要件
+
+- **検索要件**: 任意の項目でデータ検索可能
+- **日付要件**: 取引日時の正確な記録
+- **金額要件**: 取引金額の正確な記録
+- **署名要件**: 電子署名（チェックサム）による改ざん防止
+- **保存期間**: 10年間のデータ保持
+- **可視性要件**: 随時閲覧可能な形式
+
+## 技術仕様
+
+- **フレームワーク**: Flet
+- **言語**: Python 3.8+
+- **データベース**: SQLite
+- **UI**: モダンなマテリアルデザイン
+- **対応OS**: Android, iOS, Windows, macOS, Linux
+- **オフライン動作**: 完全スタンドアローン
+
+## 法令対応
+
+電子帳簿保存法のすべての要件を満たす設計：
+- 完全な監査証跡の保持
+- データ改ざん防止機能
+- 10年間の長期保存
+- 検索・閲覧の容易性
+- 定期的な整合性検証

build.py

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+"""Androidビルド用スクリプト"""
+import subprocess
+import sys
+import os
+
+def build_android():
+    """販売アシスト1号をAndroidアプリとしてビルド"""
+    
+    print("🚀 販売アシスト1号 Androidビルド開始...")
+    
+    # FletでAndroidビルド
+    try:
+        result = subprocess.run([
+            sys.executable, "-m", "flet", "pack", "main.py",
+            "--android",
+            "--name", "販売アシスト1号",
+            "--package-name", "com.sales.assistant1",
+            "--icon", "icon.png"  # アイコンがあれば
+        ], check=True, capture_output=True, text=True)
+        
+        print("✅ ビルド成功!")
+        print(result.stdout)
+        
+    except subprocess.CalledProcessError as e:
+        print("❌ ビルド失敗:")
+        print(e.stderr)
+        return False
+    except FileNotFoundError:
+        print("❌ Fletがインストールされていません")
+        print("pip install flet を実行してください")
+        return False
+    
+    return True
+
+if __name__ == "__main__":
+    if build_android():
+        print("\n🎉 販売アシスト1号のAndroidビルドが完了しました!")
+        print("生成されたAPKファイルをAndroid端末にインストールしてください")
+    else:
+        print("\n💥 ビルドに失敗しました")

compliance.py

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+"""電子帳簿保存法対応機能"""
+import sqlite3
+import datetime
+import hashlib
+import json
+from typing import Dict, List, Optional
+import logging
+
+class ComplianceManager:
+    """電子帳簿保存法対応マネージャー"""
+    
+    def __init__(self, db_path: str = "sales.db"):
+        self.db_path = db_path
+        self.logger = logging.getLogger(__name__)
+        self.init_compliance_tables()
+    
+    def init_compliance_tables(self):
+        """電子帳簿保存法対応テーブルを初期化"""
+        conn = sqlite3.connect(self.db_path)
+        cursor = conn.cursor()
+        
+        # 監査ログテーブル
+        cursor.execute('''
+            CREATE TABLE IF NOT EXISTS audit_logs (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                table_name TEXT NOT NULL,
+                record_id INTEGER NOT NULL,
+                operation TEXT NOT NULL, -- 'CREATE', 'UPDATE', 'DELETE'
+                old_data TEXT, -- JSON形式
+                new_data TEXT, -- JSON形式
+                user_id TEXT DEFAULT 'system',
+                timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                checksum TEXT NOT NULL
+            )
+        ''')
+        
+        # データ整合性チェックテーブル
+        cursor.execute('''
+            CREATE TABLE IF NOT EXISTS integrity_checks (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                table_name TEXT NOT NULL,
+                record_count INTEGER NOT NULL,
+                checksum TEXT NOT NULL,
+                check_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                status TEXT DEFAULT 'OK' -- 'OK', 'ERROR', 'WARNING'
+            )
+        ''')
+        
+        # 長期アーカイブテーブル（10年保存用）
+        cursor.execute('''
+            CREATE TABLE IF NOT EXISTS archive_sales (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                original_id INTEGER NOT NULL,
+                customer_id INTEGER,
+                product_id INTEGER,
+                quantity INTEGER NOT NULL,
+                unit_price REAL NOT NULL,
+                total_price REAL NOT NULL,
+                sale_date TIMESTAMP NOT NULL,
+                customer_name TEXT,
+                product_name TEXT,
+                archived_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                retention_end_date TIMESTAMP NOT NULL, -- 10年後
+                checksum TEXT NOT NULL
+            )
+        ''')
+        
+        conn.commit()
+        conn.close()
+    
+    def log_change(self, table_name: str, record_id: int, operation: str, 
+                   old_data: Dict = None, new_data: Dict = None, user_id: str = "system"):
+        """データ変更を監査ログに記録"""
+        conn = sqlite3.connect(self.db_path)
+        cursor = conn.cursor()
+        
+        # チェックサム計算
+        audit_data = {
+            "table": table_name,
+            "id": record_id,
+            "operation": operation,
+            "timestamp": datetime.datetime.now().isoformat(),
+            "old": old_data,
+            "new": new_data
+        }
+        checksum = self.calculate_checksum(audit_data)
+        
+        cursor.execute('''
+            INSERT INTO audit_logs 
+            (table_name, record_id, operation, old_data, new_data, user_id, checksum)
+            VALUES (?, ?, ?, ?, ?, ?, ?)
+        ''', (
+            table_name, record_id, operation,
+            json.dumps(old_data, ensure_ascii=False) if old_data else None,
+            json.dumps(new_data, ensure_ascii=False) if new_data else None,
+            user_id, checksum
+        ))
+        
+        conn.commit()
+        conn.close()
+    
+    def calculate_checksum(self, data: Dict) -> str:
+        """データのチェックサムを計算"""
+        data_str = json.dumps(data, sort_keys=True, ensure_ascii=False)
+        return hashlib.sha256(data_str.encode()).hexdigest()
+    
+    def verify_data_integrity(self, table_name: str) -> Dict:
+        """テーブルのデータ整合性を検証"""
+        conn = sqlite3.connect(self.db_path)
+        cursor = conn.cursor()
+        
+        try:
+            # テーブルの全データ取得
+            cursor.execute(f"SELECT * FROM {table_name}")
+            rows = cursor.fetchall()
+            columns = [description[0] for description in cursor.description]
+            
+            # チェックサム計算
+            table_data = []
+            for row in rows:
+                record = dict(zip(columns, row))
+                table_data.append(record)
+            
+            checksum = self.calculate_checksum({
+                "table": table_name,
+                "count": len(table_data),
+                "data": table_data
+            })
+            
+            # 整合性チェック結果を記録
+            cursor.execute('''
+                INSERT INTO integrity_checks 
+                (table_name, record_count, checksum, status)
+                VALUES (?, ?, ?, ?)
+            ''', (table_name, len(table_data), checksum, 'OK'))
+            
+            conn.commit()
+            
+            return {
+                "status": "OK",
+                "table": table_name,
+                "record_count": len(table_data),
+                "checksum": checksum,
+                "check_date": datetime.datetime.now().isoformat()
+            }
+            
+        except Exception as e:
+            self.logger.error(f"整合性チェックエラー: {str(e)}")
+            return {
+                "status": "ERROR",
+                "table": table_name,
+                "error": str(e),
+                "check_date": datetime.datetime.now().isoformat()
+            }
+        finally:
+            conn.close()
+    
+    def archive_old_data(self, years: int = 7) -> Dict:
+        """古いデータをアーカイブ（デフォルト7年以上前）"""
+        conn = sqlite3.connect(self.db_path)
+        cursor = conn.cursor()
+        
+        try:
+            # アーカイブ対象日付を計算
+            archive_date = datetime.datetime.now() - datetime.timedelta(days=years*365)
+            retention_end = datetime.datetime.now() + datetime.timedelta(days=10*365)
+            
+            # アーカイブ対象の売上データを取得
+            cursor.execute('''
+                SELECT s.*, c.name as customer_name, p.name as product_name
+                FROM sales s
+                LEFT JOIN customers c ON s.customer_id = c.id
+                LEFT JOIN products p ON s.product_id = p.id
+                WHERE s.sale_date < ?
+            ''', (archive_date,))
+            
+            old_sales = cursor.fetchall()
+            
+            archived_count = 0
+            for sale in old_sales:
+                # アーカイブデータ作成
+                archive_data = {
+                    "original_id": sale[0],
+                    "customer_id": sale[1],
+                    "product_id": sale[2],
+                    "quantity": sale[3],
+                    "unit_price": sale[4],
+                    "total_price": sale[5],
+                    "sale_date": sale[6],
+                    "customer_name": sale[7],
+                    "product_name": sale[8],
+                    "retention_end_date": retention_end
+                }
+                
+                checksum = self.calculate_checksum(archive_data)
+                
+                # アーカイブテーブルに挿入
+                cursor.execute('''
+                    INSERT INTO archive_sales 
+                    (original_id, customer_id, product_id, quantity, unit_price, 
+                     total_price, sale_date, customer_name, product_name, 
+                     retention_end_date, checksum)
+                    VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+                ''', (
+                    sale[0], sale[1], sale[2], sale[3], sale[4], sale[5],
+                    sale[6], sale[7], sale[8], retention_end, checksum
+                ))
+                
+                archived_count += 1
+                
+                # 元のテーブルから削除
+                cursor.execute("DELETE FROM sales WHERE id = ?", (sale[0],))
+                
+                # 監査ログ記録
+                self.log_change("sales", sale[0], "ARCHIVE", 
+                               {"archived": True}, archive_data)
+            
+            conn.commit()
+            
+            return {
+                "status": "SUCCESS",
+                "archived_count": archived_count,
+                "archive_date": archive_date.isoformat(),
+                "retention_end": retention_end.isoformat()
+            }
+            
+        except Exception as e:
+            self.logger.error(f"アーカイブエラー: {str(e)}")
+            return {
+                "status": "ERROR",
+                "error": str(e)
+            }
+        finally:
+            conn.close()
+    
+    def get_audit_trail(self, table_name: str = None, record_id: int = None) -> List[Dict]:
+        """監査証跡を取得"""
+        conn = sqlite3.connect(self.db_path)
+        cursor = conn.cursor()
+        
+        query = "SELECT * FROM audit_logs WHERE 1=1"
+        params = []
+        
+        if table_name:
+            query += " AND table_name = ?"
+            params.append(table_name)
+        
+        if record_id:
+            query += " AND record_id = ?"
+            params.append(record_id)
+        
+        query += " ORDER BY timestamp DESC"
+        
+        cursor.execute(query, params)
+        logs = []
+        
+        for row in cursor.fetchall():
+            logs.append({
+                "id": row[0],
+                "table_name": row[1],
+                "record_id": row[2],
+                "operation": row[3],
+                "old_data": json.loads(row[4]) if row[4] else None,
+                "new_data": json.loads(row[5]) if row[5] else None,
+                "user_id": row[6],
+                "timestamp": row[7],
+                "checksum": row[8]
+            })
+        
+        conn.close()
+        return logs
+    
+    def generate_compliance_report(self) -> Dict:
+        """電子帳簿保存法コンプライアンスレポートを生成"""
+        conn = sqlite3.connect(self.db_path)
+        cursor = conn.cursor()
+        
+        report = {
+            "generated_date": datetime.datetime.now().isoformat(),
+            "database_path": self.db_path,
+            "tables": {},
+            "audit_summary": {},
+            "archive_summary": {},
+            "compliance_status": "COMPLIANT"
+        }
+        
+        # 各テーブルの状況
+        for table in ["customers", "products", "sales"]:
+            cursor.execute(f"SELECT COUNT(*) FROM {table}")
+            count = cursor.fetchone()[0]
+            
+            # 最新の整合性チェック
+            cursor.execute('''
+                SELECT status, check_date, checksum 
+                FROM integrity_checks 
+                WHERE table_name = ? 
+                ORDER BY check_date DESC 
+                LIMIT 1
+            ''', (table,))
+            
+            integrity_result = cursor.fetchone()
+            
+            report["tables"][table] = {
+                "record_count": count,
+                "last_integrity_check": {
+                    "status": integrity_result[0] if integrity_result else "NOT_CHECKED",
+                    "date": integrity_result[1] if integrity_result else None,
+                    "checksum": integrity_result[2] if integrity_result else None
+                }
+            }
+        
+        # 監査ログサマリー
+        cursor.execute('''
+            SELECT operation, COUNT(*) as count 
+            FROM audit_logs 
+            WHERE timestamp > date('now', '-1 year')
+            GROUP BY operation
+        ''')
+        
+        audit_summary = {}
+        for row in cursor.fetchall():
+            audit_summary[row[0]] = row[1]
+        
+        report["audit_summary"] = audit_summary
+        
+        # アーカイブサマリー
+        cursor.execute('''
+            SELECT COUNT(*) as total,
+                   MIN(archived_date) as oldest,
+                   MAX(retention_end_date) as latest_retention
+            FROM archive_sales
+        ''')
+        
+        archive_result = cursor.fetchone()
+        if archive_result[0] > 0:
+            report["archive_summary"] = {
+                "archived_records": archive_result[0],
+                "oldest_archive": archive_result[1],
+                "latest_retention_end": archive_result[2]
+            }
+        
+        conn.close()
+        return report
+
+if __name__ == "__main__":
+    # テスト実行
+    compliance = ComplianceManager()
+    
+    print("🔍 データ整合性チェック実行中...")
+    for table in ["customers", "products", "sales"]:
+        result = compliance.verify_data_integrity(table)
+        print(f"✅ {table}: {result['status']} ({result['record_count']}件)")
+    
+    print("\n📋 コンプライアンスレポート生成...")
+    report = compliance.generate_compliance_report()
+    print(json.dumps(report, ensure_ascii=False, indent=2))

data_export.py

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+"""データエクスポート機能"""
+import sqlite3
+import json
+import csv
+import datetime
+from typing import List, Dict
+
+class DataExporter:
+    """販売アシスト1号のデータエクスポート担当"""
+    
+    def __init__(self, db_path: str = "sales.db"):
+        self.db_path = db_path
+    
+    def export_to_json(self, output_path: str = None) -> str:
+        """全データをJSON形式でエクスポート"""
+        if not output_path:
+            timestamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
+            output_path = f"sales_backup_{timestamp}.json"
+        
+        data = {
+            "export_date": datetime.datetime.now().isoformat(),
+            "customers": self._get_customers(),
+            "products": self._get_products(),
+            "sales": self._get_sales()
+        }
+        
+        with open(output_path, 'w', encoding='utf-8') as f:
+            json.dump(data, f, ensure_ascii=False, indent=2)
+        
+        return output_path
+    
+    def export_to_csv(self, output_dir: str = ".") -> Dict[str, str]:
+        """各テーブルをCSV形式でエクスポート"""
+        timestamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
+        
+        files = {}
+        
+        # 顧客データ
+        customers_file = f"{output_dir}/customers_{timestamp}.csv"
+        self._export_table_to_csv("customers", customers_file)
+        files["customers"] = customers_file
+        
+        # 商品データ
+        products_file = f"{output_dir}/products_{timestamp}.csv"
+        self._export_table_to_csv("products", products_file)
+        files["products"] = products_file
+        
+        # 売上データ
+        sales_file = f"{output_dir}/sales_{timestamp}.csv"
+        self._export_table_to_csv("sales", sales_file)
+        files["sales"] = sales_file
+        
+        return files
+    
+    def _get_customers(self) -> List[Dict]:
+        """顧客データ取得"""
+        conn = sqlite3.connect(self.db_path)
+        cursor = conn.cursor()
+        cursor.execute("SELECT * FROM customers ORDER BY created_at DESC")
+        
+        customers = []
+        for row in cursor.fetchall():
+            customers.append({
+                'id': row[0],
+                'name': row[1],
+                'company': row[2],
+                'phone': row[3],
+                'email': row[4],
+                'address': row[5],
+                'created_at': row[6]
+            })
+        
+        conn.close()
+        return customers
+    
+    def _get_products(self) -> List[Dict]:
+        """商品データ取得"""
+        conn = sqlite3.connect(self.db_path)
+        cursor = conn.cursor()
+        cursor.execute("SELECT * FROM products ORDER BY created_at DESC")
+        
+        products = []
+        for row in cursor.fetchall():
+            products.append({
+                'id': row[0],
+                'name': row[1],
+                'code': row[2],
+                'price': row[3],
+                'stock': row[4],
+                'description': row[5],
+                'created_at': row[6]
+            })
+        
+        conn.close()
+        return products
+    
+    def _get_sales(self) -> List[Dict]:
+        """売上データ取得"""
+        conn = sqlite3.connect(self.db_path)
+        cursor = conn.cursor()
+        cursor.execute('''
+            SELECT s.*, c.name as customer_name, p.name as product_name
+            FROM sales s
+            LEFT JOIN customers c ON s.customer_id = c.id
+            LEFT JOIN products p ON s.product_id = p.id
+            ORDER BY s.sale_date DESC
+        ''')
+        
+        sales = []
+        for row in cursor.fetchall():
+            sales.append({
+                'id': row[0],
+                'customer_id': row[1],
+                'product_id': row[2],
+                'quantity': row[3],
+                'unit_price': row[4],
+                'total_price': row[5],
+                'sale_date': row[6],
+                'customer_name': row[7] or '不明',
+                'product_name': row[8] or '不明'
+            })
+        
+        conn.close()
+        return sales
+    
+    def _export_table_to_csv(self, table_name: str, output_path: str):
+        """テーブルをCSVにエクスポート"""
+        conn = sqlite3.connect(self.db_path)
+        cursor = conn.cursor()
+        
+        # テーブルデータ取得
+        if table_name == "sales":
+            cursor.execute('''
+                SELECT s.id, c.name as customer_name, p.name as product_name,
+                       s.quantity, s.unit_price, s.total_price, s.sale_date
+                FROM sales s
+                LEFT JOIN customers c ON s.customer_id = c.id
+                LEFT JOIN products p ON s.product_id = p.id
+                ORDER BY s.sale_date DESC
+            ''')
+            headers = ['ID', '顧客名', '商品名', '数量', '単価', '合計', '日時']
+        else:
+            cursor.execute(f"SELECT * FROM {table_name}")
+            headers = [description[0] for description in cursor.description]
+        
+        rows = cursor.fetchall()
+        
+        # CSV書き込み
+        with open(output_path, 'w', newline='', encoding='utf-8') as csvfile:
+            writer = csv.writer(csvfile)
+            writer.writerow(headers)
+            writer.writerows(rows)
+        
+        conn.close()
+
+if __name__ == "__main__":
+    exporter = DataExporter()
+    
+    print("📦 データエクスポート中...")
+    
+    # JSONエクスポート
+    json_file = exporter.export_to_json()
+    print(f"✅ JSONエクスポート完了: {json_file}")
+    
+    # CSVエクスポート
+    csv_files = exporter.export_to_csv()
+    print("✅ CSVエクスポート完了:")
+    for table, file in csv_files.items():
+        print(f"  {table}: {file}")

main.py

@@ -0,0 +1,889 @@
+import flet as ft
+import sqlite3
+import datetime
+from typing import List, Dict, Optional
+from data_export import DataExporter
+from compliance import ComplianceManager
+
+class SalesAssistant:
+    def __init__(self, page: ft.Page):
+        self.page = page
+        self.page.title = "販売アシスト1号"
+        self.page.theme_mode = ft.ThemeMode.LIGHT
+        self.page.vertical_alignment = ft.MainAxisAlignment.CENTER
+        self.page.horizontal_alignment = ft.CrossAxisAlignment.CENTER
+        
+        # Initialize database
+        self.init_database()
+        
+        # Initialize data exporter and compliance manager
+        self.exporter = DataExporter()
+        self.compliance = ComplianceManager()
+        
+        # Navigation
+        self.navigation_rail = ft.NavigationRail(
+            selected_index=0,
+            label_type=ft.NavigationRailLabelType.ALL,
+            min_width=100,
+            min_extended_width=200,
+            destinations=[
+                ft.NavigationRailDestination(
+                    icon=ft.icons.DASHBOARD_OUTLINED,
+                    selected_icon=ft.icons.DASHBOARD,
+                    label="ダッシュボード"
+                ),
+                ft.NavigationRailDestination(
+                    icon=ft.icons.PEOPLE_OUTLINED,
+                    selected_icon=ft.icons.PEOPLE,
+                    label="顧客管理"
+                ),
+                ft.NavigationRailDestination(
+                    icon=ft.icons.INVENTORY_2_OUTLINED,
+                    selected_icon=ft.icons.INVENTORY_2,
+                    label="商品管理"
+                ),
+                ft.NavigationRailDestination(
+                    icon=ft.icons.RECEIPT_OUTLINED,
+                    selected_icon=ft.icons.RECEIPT,
+                    label="売上管理"
+                ),
+                ft.NavigationRailDestination(
+                    icon=ft.icons.DOWNLOAD_OUTLINED,
+                    selected_icon=ft.icons.DOWNLOAD,
+                    label="データ出力"
+                ),
+                ft.NavigationRailDestination(
+                    icon=ft.icons.GAVEL_OUTLINED,
+                    selected_icon=ft.icons.GAVEL,
+                    label="コンプライアンス"
+                ),
+            ],
+            on_change=self.navigation_changed
+        )
+        
+        # Content area
+        self.content_area = ft.Container(expand=True)
+        
+        # Main layout
+        self.main_layout = ft.Row(
+            [
+                self.navigation_rail,
+                ft.VerticalDivider(width=1),
+                self.content_area
+            ],
+            expand=True
+        )
+        
+        # Show dashboard initially
+        self.show_dashboard()
+        
+        # Add main layout to page
+        self.page.add(self.main_layout)
+    
+    def init_database(self):
+        """Initialize SQLite database"""
+        conn = sqlite3.connect('sales.db')
+        cursor = conn.cursor()
+        
+        # Create customers table
+        cursor.execute('''
+            CREATE TABLE IF NOT EXISTS customers (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                name TEXT NOT NULL,
+                company TEXT,
+                phone TEXT,
+                email TEXT,
+                address TEXT,
+                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+            )
+        ''')
+        
+        # Create products table
+        cursor.execute('''
+            CREATE TABLE IF NOT EXISTS products (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                name TEXT NOT NULL,
+                code TEXT UNIQUE,
+                price REAL NOT NULL,
+                stock INTEGER DEFAULT 0,
+                description TEXT,
+                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+            )
+        ''')
+        
+        # Create sales table
+        cursor.execute('''
+            CREATE TABLE IF NOT EXISTS sales (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                customer_id INTEGER,
+                product_id INTEGER,
+                quantity INTEGER NOT NULL,
+                unit_price REAL NOT NULL,
+                total_price REAL NOT NULL,
+                sale_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (customer_id) REFERENCES customers (id),
+                FOREIGN KEY (product_id) REFERENCES products (id)
+            )
+        ''')
+        
+        conn.commit()
+        conn.close()
+    
+    def navigation_changed(self, e):
+        """Handle navigation rail changes"""
+        if e.control.selected_index == 0:
+            self.show_dashboard()
+        elif e.control.selected_index == 1:
+            self.show_customers()
+        elif e.control.selected_index == 2:
+            self.show_products()
+        elif e.control.selected_index == 3:
+            self.show_sales()
+        elif e.control.selected_index == 4:
+            self.show_data_export()
+        elif e.control.selected_index == 5:
+            self.show_compliance()
+    
+    def show_dashboard(self):
+        """Show dashboard view"""
+        # Get statistics
+        conn = sqlite3.connect('sales.db')
+        cursor = conn.cursor()
+        
+        # Total customers
+        cursor.execute("SELECT COUNT(*) FROM customers")
+        total_customers = cursor.fetchone()[0]
+        
+        # Total products
+        cursor.execute("SELECT COUNT(*) FROM products")
+        total_products = cursor.fetchone()[0]
+        
+        # Total sales
+        cursor.execute("SELECT COUNT(*) FROM sales")
+        total_sales = cursor.fetchone()[0]
+        
+        # Total revenue
+        cursor.execute("SELECT SUM(total_price) FROM sales")
+        total_revenue = cursor.fetchone()[0] or 0
+        
+        conn.close()
+        
+        dashboard_content = ft.Column([
+            ft.Text("ダッシュボード", size=24, weight=ft.FontWeight.BOLD),
+            ft.Divider(),
+            ft.Row([
+                ft.Card(
+                    content=ft.Container(
+                        content=ft.Column([
+                            ft.Text("顧客数", size=16, color=ft.colors.BLUE),
+                            ft.Text(str(total_customers), size=32, weight=ft.FontWeight.BOLD)
+                        ]),
+                        padding=20,
+                        width=150
+                    )
+                ),
+                ft.Card(
+                    content=ft.Container(
+                        content=ft.Column([
+                            ft.Text("商品数", size=16, color=ft.colors.GREEN),
+                            ft.Text(str(total_products), size=32, weight=ft.FontWeight.BOLD)
+                        ]),
+                        padding=20,
+                        width=150
+                    )
+                ),
+                ft.Card(
+                    content=ft.Container(
+                        content=ft.Column([
+                            ft.Text("売上件数", size=16, color=ft.colors.ORANGE),
+                            ft.Text(str(total_sales), size=32, weight=ft.FontWeight.BOLD)
+                        ]),
+                        padding=20,
+                        width=150
+                    )
+                ),
+                ft.Card(
+                    content=ft.Container(
+                        content=ft.Column([
+                            ft.Text("総売上", size=16, color=ft.colors.PURPLE),
+                            ft.Text(f"¥{total_revenue:,.0f}", size=32, weight=ft.FontWeight.BOLD)
+                        ]),
+                        padding=20,
+                        width=150
+                    )
+                )
+            ], wrap=True)
+        ], scroll=ft.ScrollMode.AUTO)
+        
+        self.content_area.content = ft.Container(dashboard_content, padding=20)
+        self.page.update()
+    
+    def show_customers(self):
+        """Show customers management view"""
+        customers = self.get_customers()
+        
+        # Customer list
+        customer_list = ft.ListView(
+            expand=True,
+            spacing=10,
+            padding=10
+        )
+        
+        for customer in customers:
+            customer_list.controls.append(
+                ft.Card(
+                    content=ft.Container(
+                        content=ft.ListTile(
+                            title=ft.Text(customer['name']),
+                            subtitle=ft.Text(customer['company'] or ''),
+                            trailing=ft.Row([
+                                ft.IconButton(
+                                    icon=ft.icons.EDIT,
+                                    on_click=lambda e, c=customer: self.edit_customer(c)
+                                ),
+                                ft.IconButton(
+                                    icon=ft.icons.DELETE,
+                                    on_click=lambda e, c=customer: self.delete_customer(c)
+                                )
+                            ])
+                        ),
+                        padding=10
+                    )
+                )
+            )
+        
+        # Add customer button
+        add_button = ft.ElevatedButton(
+            "顧客を追加",
+            icon=ft.icons.ADD,
+            on_click=self.add_customer_dialog
+        )
+        
+        customers_content = ft.Column([
+            ft.Row([
+                ft.Text("顧客管理", size=24, weight=ft.FontWeight.BOLD),
+                add_button
+            ], alignment=ft.MainAxisAlignment.SPACE_BETWEEN),
+            ft.Divider(),
+            customer_list
+        ], scroll=ft.ScrollMode.AUTO)
+        
+        self.content_area.content = ft.Container(customers_content, padding=20)
+        self.page.update()
+    
+    def show_products(self):
+        """Show products management view"""
+        products = self.get_products()
+        
+        # Product list
+        product_list = ft.ListView(
+            expand=True,
+            spacing=10,
+            padding=10
+        )
+        
+        for product in products:
+            product_list.controls.append(
+                ft.Card(
+                    content=ft.Container(
+                        content=ft.ListTile(
+                            title=ft.Text(product['name']),
+                            subtitle=ft.Text(f"¥{product['price']:,.0f} | 在庫: {product['stock']}"),
+                            trailing=ft.Row([
+                                ft.IconButton(
+                                    icon=ft.icons.EDIT,
+                                    on_click=lambda e, p=product: self.edit_product(p)
+                                ),
+                                ft.IconButton(
+                                    icon=ft.icons.DELETE,
+                                    on_click=lambda e, p=product: self.delete_product(p)
+                                )
+                            ])
+                        ),
+                        padding=10
+                    )
+                )
+            )
+        
+        # Add product button
+        add_button = ft.ElevatedButton(
+            "商品を追加",
+            icon=ft.icons.ADD,
+            on_click=self.add_product_dialog
+        )
+        
+        products_content = ft.Column([
+            ft.Row([
+                ft.Text("商品管理", size=24, weight=ft.FontWeight.BOLD),
+                add_button
+            ], alignment=ft.MainAxisAlignment.SPACE_BETWEEN),
+            ft.Divider(),
+            product_list
+        ], scroll=ft.ScrollMode.AUTO)
+        
+        self.content_area.content = ft.Container(products_content, padding=20)
+        self.page.update()
+    
+    def show_sales(self):
+        """Show sales management view"""
+        sales = self.get_sales()
+        
+        # Sales list
+        sales_list = ft.ListView(
+            expand=True,
+            spacing=10,
+            padding=10
+        )
+        
+        for sale in sales:
+            sales_list.controls.append(
+                ft.Card(
+                    content=ft.Container(
+                        content=ft.ListTile(
+                            title=ft.Text(f"{sale['customer_name']} - {sale['product_name']}"),
+                            subtitle=ft.Text(f"{sale['quantity']}個 × ¥{sale['unit_price']:,.0f} = ¥{sale['total_price']:,.0f}"),
+                            trailing=ft.Text(sale['sale_date'].split()[0])
+                        ),
+                        padding=10
+                    )
+                )
+            )
+        
+        # Add sale button
+        add_button = ft.ElevatedButton(
+            "売上を追加",
+            icon=ft.icons.ADD,
+            on_click=self.add_sale_dialog
+        )
+        
+        sales_content = ft.Column([
+            ft.Row([
+                ft.Text("売上管理", size=24, weight=ft.FontWeight.BOLD),
+                add_button
+            ], alignment=ft.MainAxisAlignment.SPACE_BETWEEN),
+            ft.Divider(),
+            sales_list
+        ], scroll=ft.ScrollMode.AUTO)
+        
+        self.content_area.content = ft.Container(sales_content, padding=20)
+        self.page.update()
+    
+    def get_customers(self) -> List[Dict]:
+        """Get all customers from database"""
+        conn = sqlite3.connect('sales.db')
+        cursor = conn.cursor()
+        cursor.execute("SELECT * FROM customers ORDER BY created_at DESC")
+        customers = []
+        for row in cursor.fetchall():
+            customers.append({
+                'id': row[0],
+                'name': row[1],
+                'company': row[2],
+                'phone': row[3],
+                'email': row[4],
+                'address': row[5],
+                'created_at': row[6]
+            })
+        conn.close()
+        return customers
+    
+    def get_products(self) -> List[Dict]:
+        """Get all products from database"""
+        conn = sqlite3.connect('sales.db')
+        cursor = conn.cursor()
+        cursor.execute("SELECT * FROM products ORDER BY created_at DESC")
+        products = []
+        for row in cursor.fetchall():
+            products.append({
+                'id': row[0],
+                'name': row[1],
+                'code': row[2],
+                'price': row[3],
+                'stock': row[4],
+                'description': row[5],
+                'created_at': row[6]
+            })
+        conn.close()
+        return products
+    
+    def get_sales(self) -> List[Dict]:
+        """Get all sales with customer and product names"""
+        conn = sqlite3.connect('sales.db')
+        cursor = conn.cursor()
+        cursor.execute('''
+            SELECT s.*, c.name as customer_name, p.name as product_name
+            FROM sales s
+            LEFT JOIN customers c ON s.customer_id = c.id
+            LEFT JOIN products p ON s.product_id = p.id
+            ORDER BY s.sale_date DESC
+        ''')
+        sales = []
+        for row in cursor.fetchall():
+            sales.append({
+                'id': row[0],
+                'customer_id': row[1],
+                'product_id': row[2],
+                'quantity': row[3],
+                'unit_price': row[4],
+                'total_price': row[5],
+                'sale_date': row[6],
+                'customer_name': row[7] or '不明',
+                'product_name': row[8] or '不明'
+            })
+        conn.close()
+        return sales
+    
+    def add_customer_dialog(self, e):
+        """Show add customer dialog"""
+        name_field = ft.TextField(label="氏名", autofocus=True)
+        company_field = ft.TextField(label="会社名")
+        phone_field = ft.TextField(label="電話番号")
+        email_field = ft.TextField(label="メールアドレス")
+        address_field = ft.TextField(label="住所")
+        
+        def save_customer(e):
+            conn = sqlite3.connect('sales.db')
+            cursor = conn.cursor()
+            cursor.execute('''
+                INSERT INTO customers (name, company, phone, email, address)
+                VALUES (?, ?, ?, ?, ?)
+            ''', (name_field.value, company_field.value, phone_field.value, 
+                  email_field.value, address_field.value))
+            conn.commit()
+            conn.close()
+            dialog.open = False
+            self.show_customers()
+            self.page.update()
+        
+        dialog = ft.AlertDialog(
+            title=ft.Text("顧客を追加"),
+            content=ft.Column([
+                name_field,
+                company_field,
+                phone_field,
+                email_field,
+                address_field
+            ], tight=True),
+            actions=[
+                ft.TextButton("キャンセル", on_click=lambda e: self.close_dialog(dialog)),
+                ft.TextButton("保存", on_click=save_customer)
+            ],
+            actions_alignment=ft.MainAxisAlignment.END
+        )
+        
+        self.page.dialog = dialog
+        dialog.open = True
+        self.page.update()
+    
+    def add_product_dialog(self, e):
+        """Show add product dialog"""
+        name_field = ft.TextField(label="商品名", autofocus=True)
+        code_field = ft.TextField(label="商品コード")
+        price_field = ft.TextField(label="価格", keyboard_type=ft.KeyboardType.NUMBER)
+        stock_field = ft.TextField(label="在庫数", keyboard_type=ft.KeyboardType.NUMBER)
+        description_field = ft.TextField(label="説明", multiline=True)
+        
+        def save_product(e):
+            conn = sqlite3.connect('sales.db')
+            cursor = conn.cursor()
+            cursor.execute('''
+                INSERT INTO products (name, code, price, stock, description)
+                VALUES (?, ?, ?, ?, ?)
+            ''', (name_field.value, code_field.value, float(price_field.value or 0), 
+                  int(stock_field.value or 0), description_field.value))
+            conn.commit()
+            conn.close()
+            dialog.open = False
+            self.show_products()
+            self.page.update()
+        
+        dialog = ft.AlertDialog(
+            title=ft.Text("商品を追加"),
+            content=ft.Column([
+                name_field,
+                code_field,
+                price_field,
+                stock_field,
+                description_field
+            ], tight=True),
+            actions=[
+                ft.TextButton("キャンセル", on_click=lambda e: self.close_dialog(dialog)),
+                ft.TextButton("保存", on_click=save_product)
+            ],
+            actions_alignment=ft.MainAxisAlignment.END
+        )
+        
+        self.page.dialog = dialog
+        dialog.open = True
+        self.page.update()
+    
+    def add_sale_dialog(self, e):
+        """Show add sale dialog"""
+        customers = self.get_customers()
+        products = self.get_products()
+        
+        customer_dropdown = ft.Dropdown(
+            label="顧客",
+            options=[ft.dropdown.Option(c['name'], key=str(c['id'])) for c in customers]
+        )
+        product_dropdown = ft.Dropdown(
+            label="商品",
+            options=[ft.dropdown.Option(p['name'], key=str(p['id'])) for p in products],
+            on_change=lambda e: self.update_price_display(e, product_dropdown, price_field, quantity_field, total_field)
+        )
+        quantity_field = ft.TextField(
+            label="数量",
+            value="1",
+            keyboard_type=ft.KeyboardType.NUMBER,
+            on_change=lambda e: self.calculate_total(price_field, quantity_field, total_field)
+        )
+        price_field = ft.TextField(
+            label="単価",
+            keyboard_type=ft.KeyboardType.NUMBER,
+            on_change=lambda e: self.calculate_total(price_field, quantity_field, total_field)
+        )
+        total_field = ft.TextField(label="合計", read_only=True)
+        
+        def save_sale(e):
+            conn = sqlite3.connect('sales.db')
+            cursor = conn.cursor()
+            cursor.execute('''
+                INSERT INTO sales (customer_id, product_id, quantity, unit_price, total_price)
+                VALUES (?, ?, ?, ?, ?)
+            ''', (int(customer_dropdown.value), int(product_dropdown.value), 
+                  int(quantity_field.value), float(price_field.value), 
+                  float(total_field.value)))
+            conn.commit()
+            conn.close()
+            dialog.open = False
+            self.show_sales()
+            self.page.update()
+        
+        dialog = ft.AlertDialog(
+            title=ft.Text("売上を追加"),
+            content=ft.Column([
+                customer_dropdown,
+                product_dropdown,
+                quantity_field,
+                price_field,
+                total_field
+            ], tight=True),
+            actions=[
+                ft.TextButton("キャンセル", on_click=lambda e: self.close_dialog(dialog)),
+                ft.TextButton("保存", on_click=save_sale)
+            ],
+            actions_alignment=ft.MainAxisAlignment.END
+        )
+        
+        self.page.dialog = dialog
+        dialog.open = True
+        self.page.update()
+    
+    def update_price_display(self, e, product_dropdown, price_field, quantity_field, total_field):
+        """Update price when product is selected"""
+        if product_dropdown.value:
+            conn = sqlite3.connect('sales.db')
+            cursor = conn.cursor()
+            cursor.execute("SELECT price FROM products WHERE id = ?", (int(product_dropdown.value),))
+            result = cursor.fetchone()
+            conn.close()
+            if result:
+                price_field.value = str(result[0])
+                self.calculate_total(price_field, quantity_field, total_field)
+                self.page.update()
+    
+    def calculate_total(self, price_field, quantity_field, total_field):
+        """Calculate total price"""
+        try:
+            price = float(price_field.value or 0)
+            quantity = int(quantity_field.value or 1)
+            total_field.value = str(price * quantity)
+        except ValueError:
+            total_field.value = "0"
+        self.page.update()
+    
+    def close_dialog(self, dialog):
+        """Close dialog"""
+        dialog.open = False
+        self.page.update()
+    
+    def edit_customer(self, customer):
+        """Edit customer (placeholder)"""
+        self.page.snack_bar = ft.SnackBar(content=ft.Text("顧客編集機能は準備中です"))
+        self.page.snack_bar.open = True
+        self.page.update()
+    
+    def delete_customer(self, customer):
+        """Delete customer"""
+        def confirm_delete(e):
+            conn = sqlite3.connect('sales.db')
+            cursor = conn.cursor()
+            cursor.execute("DELETE FROM customers WHERE id = ?", (customer['id'],))
+            conn.commit()
+            conn.close()
+            dialog.open = False
+            self.show_customers()
+            self.page.update()
+        
+        dialog = ft.AlertDialog(
+            title=ft.Text("確認"),
+            content=ft.Text(f"顧客「{customer['name']}」を削除してもよろしいですか？"),
+            actions=[
+                ft.TextButton("キャンセル", on_click=lambda e: self.close_dialog(dialog)),
+                ft.TextButton("削除", on_click=confirm_delete)
+            ],
+            actions_alignment=ft.MainAxisAlignment.END
+        )
+        
+        self.page.dialog = dialog
+        dialog.open = True
+        self.page.update()
+    
+    def edit_product(self, product):
+        """Edit product (placeholder)"""
+        self.page.snack_bar = ft.SnackBar(content=ft.Text("商品編集機能は準備中です"))
+        self.page.snack_bar.open = True
+        self.page.update()
+    
+    def delete_product(self, product):
+        """Delete product"""
+        def confirm_delete(e):
+            conn = sqlite3.connect('sales.db')
+            cursor = conn.cursor()
+            cursor.execute("DELETE FROM products WHERE id = ?", (product['id'],))
+            conn.commit()
+            conn.close()
+            dialog.open = False
+            self.show_products()
+            self.page.update()
+        
+        dialog = ft.AlertDialog(
+            title=ft.Text("確認"),
+            content=ft.Text(f"商品「{product['name']}」を削除してもよろしいですか？"),
+            actions=[
+                ft.TextButton("キャンセル", on_click=lambda e: self.close_dialog(dialog)),
+                ft.TextButton("削除", on_click=confirm_delete)
+            ],
+            actions_alignment=ft.MainAxisAlignment.END
+        )
+        
+        self.page.dialog = dialog
+        dialog.open = True
+        self.page.update()
+    
+    def show_data_export(self):
+        """データ出力画面を表示"""
+        export_content = ft.Column([
+            ft.Text("データ出力", size=24, weight=ft.FontWeight.BOLD),
+            ft.Divider(),
+            ft.Card(
+                content=ft.Container(
+                    content=ft.Column([
+                        ft.Text("JSON形式で出力", size=16, weight=ft.FontWeight.BOLD),
+                        ft.Text("全データをJSON形式でエクスポートします"),
+                        ft.ElevatedButton(
+                            "JSON出力",
+                            icon=ft.icons.DOWNLOAD,
+                            on_click=self.export_json
+                        )
+                    ]),
+                    padding=20
+                )
+            ),
+            ft.Card(
+                content=ft.Container(
+                    content=ft.Column([
+                        ft.Text("CSV形式で出力", size=16, weight=ft.FontWeight.BOLD),
+                        ft.Text("各テーブルをCSV形式でエクスポートします"),
+                        ft.ElevatedButton(
+                            "CSV出力",
+                            icon=ft.icons.DOWNLOAD,
+                            on_click=self.export_csv
+                        )
+                    ]),
+                    padding=20
+                )
+            )
+        ], scroll=ft.ScrollMode.AUTO)
+        
+        self.content_area.content = ft.Container(export_content, padding=20)
+        self.page.update()
+    
+    def show_compliance(self):
+        """コンプライアンス画面を表示"""
+        compliance_content = ft.Column([
+            ft.Text("電子帳簿保存法対応", size=24, weight=ft.FontWeight.BOLD),
+            ft.Divider(),
+            ft.Card(
+                content=ft.Container(
+                    content=ft.Column([
+                        ft.Text("データ整合性チェック", size=16, weight=ft.FontWeight.BOLD),
+                        ft.Text("データの整合性を検証し、チェックサムを生成します"),
+                        ft.ElevatedButton(
+                            "整合性チェック",
+                            icon=ft.icons.CHECK_CIRCLE,
+                            on_click=self.check_integrity
+                        )
+                    ]),
+                    padding=20
+                )
+            ),
+            ft.Card(
+                content=ft.Container(
+                    content=ft.Column([
+                        ft.Text("古いデータのアーカイブ", size=16, weight=ft.FontWeight.BOLD),
+                        ft.Text("7年以上前のデータをアーカイブします（10年保存）"),
+                        ft.ElevatedButton(
+                            "データアーカイブ",
+                            icon=ft.icons.ARCHIVE,
+                            on_click=self.archive_data
+                        )
+                    ]),
+                    padding=20
+                )
+            ),
+            ft.Card(
+                content=ft.Container(
+                    content=ft.Column([
+                        ft.Text("コンプライアンスレポート", size=16, weight=ft.FontWeight.BOLD),
+                        ft.Text("電子帳簿保存法対応レポートを生成します"),
+                        ft.ElevatedButton(
+                            "レポート生成",
+                            icon=ft.icons.ASSIGNMENT,
+                            on_click=self.generate_compliance_report
+                        )
+                    ]),
+                    padding=20
+                )
+            )
+        ], scroll=ft.ScrollMode.AUTO)
+        
+        self.content_area.content = ft.Container(compliance_content, padding=20)
+        self.page.update()
+    
+    def export_json(self, e):
+        """JSON形式でデータをエクスポート"""
+        try:
+            file_path = self.exporter.export_to_json()
+            self.page.snack_bar = ft.SnackBar(
+                content=ft.Text(f"JSON出力完了: {file_path}"),
+                bgcolor=ft.colors.GREEN
+            )
+        except Exception as ex:
+            self.page.snack_bar = ft.SnackBar(
+                content=ft.Text(f"JSON出力エラー: {str(ex)}"),
+                bgcolor=ft.colors.RED
+            )
+        
+        self.page.snack_bar.open = True
+        self.page.update()
+    
+    def export_csv(self, e):
+        """CSV形式でデータをエクスポート"""
+        try:
+            files = self.exporter.export_to_csv()
+            file_list = "\n".join([f"{k}: {v}" for k, v in files.items()])
+            self.page.snack_bar = ft.SnackBar(
+                content=ft.Text(f"CSV出力完了:\n{file_list}"),
+                bgcolor=ft.colors.GREEN
+            )
+        except Exception as ex:
+            self.page.snack_bar = ft.SnackBar(
+                content=ft.Text(f"CSV出力エラー: {str(ex)}"),
+                bgcolor=ft.colors.RED
+            )
+        
+        self.page.snack_bar.open = True
+        self.page.update()
+    
+    def check_integrity(self, e):
+        """データ整合性チェック"""
+        try:
+            results = []
+            for table in ["customers", "products", "sales"]:
+                result = self.compliance.verify_data_integrity(table)
+                results.append(f"{table}: {result['status']} ({result['record_count']}件)")
+            
+            message = "整合性チェック完了:\n" + "\n".join(results)
+            self.page.snack_bar = ft.SnackBar(
+                content=ft.Text(message),
+                bgcolor=ft.colors.GREEN
+            )
+        except Exception as ex:
+            self.page.snack_bar = ft.SnackBar(
+                content=ft.Text(f"整合性チェックエラー: {str(ex)}"),
+                bgcolor=ft.colors.RED
+            )
+        
+        self.page.snack_bar.open = True
+        self.page.update()
+    
+    def archive_data(self, e):
+        """古いデータをアーカイブ"""
+        try:
+            result = self.compliance.archive_old_data()
+            if result["status"] == "SUCCESS":
+                message = f"アーカイブ完了: {result['archived_count']}件"
+                bgcolor = ft.colors.GREEN
+            else:
+                message = f"アーカイブエラー: {result['error']}"
+                bgcolor = ft.colors.RED
+            
+            self.page.snack_bar = ft.SnackBar(
+                content=ft.Text(message),
+                bgcolor=bgcolor
+            )
+        except Exception as ex:
+            self.page.snack_bar = ft.SnackBar(
+                content=ft.Text(f"アーカイブエラー: {str(ex)}"),
+                bgcolor=ft.colors.RED
+            )
+        
+        self.page.snack_bar.open = True
+        self.page.update()
+    
+    def generate_compliance_report(self, e):
+        """コンプライアンスレポートを生成"""
+        try:
+            report = self.compliance.generate_compliance_report()
+            
+            # レポート内容を表示
+            dialog = ft.AlertDialog(
+                title=ft.Text("コンプライアンスレポート"),
+                content=ft.Container(
+                    content=ft.Column([
+                        ft.Text(f"生成日時: {report['generated_date']}"),
+                        ft.Text(f"データベース: {report['database_path']}"),
+                        ft.Divider(),
+                        ft.Text("テーブル状況:", weight=ft.FontWeight.BOLD),
+                        *[ft.Text(f"  {table}: {info['record_count']}件") 
+                          for table, info in report['tables'].items()],
+                        ft.Divider(),
+                        ft.Text("監査ログ:", weight=ft.FontWeight.BOLD),
+                        *[ft.Text(f"  {op}: {count}件") 
+                          for op, count in report['audit_summary'].items()]
+                    ], scroll=ft.ScrollMode.AUTO),
+                    height=400
+                ),
+                actions=[
+                    ft.TextButton("閉じる", on_click=lambda e: self.close_dialog(dialog))
+                ]
+            )
+            
+            self.page.dialog = dialog
+            dialog.open = True
+            self.page.update()
+            
+        except Exception as ex:
+            self.page.snack_bar = ft.SnackBar(
+                content=ft.Text(f"レポート生成エラー: {str(ex)}"),
+                bgcolor=ft.colors.RED
+            )
+            self.page.snack_bar.open = True
+            self.page.update()
+
+def main(page: ft.Page):
+    app = SalesAssistant(page)
+
+if __name__ == "__main__":
+    ft.app(target=main)

requirements.txt

@@ -0,0 +1 @@
+flet>=0.21.0