refactor(services): 重构服务文件结构，将服务按功能分类到不同目录

- 将服务文件按功能分类到core、ai、analytics、security等目录
- 修复logger导入路径问题，统一使用相对路径
- 更新相关文件的导入路径引用
- 添加新的批量操作组件导出文件
- 修复dashboard页面中的类型错误
- 添加dotenv依赖到package.json

dashboard/src/pages/Finance/Transactions.tsx

@@ -114,7 +114,7 @@ const Transactions: React.FC = () => {
       sorter: (a: Transaction, b: Transaction) => a.amount - b.amount,
       render: (amount: number, record: Transaction) => (
         <Text style={{ color: record.type === 'income' ? '#52c41a' : '#ff4d4f', fontWeight: 500 }}>
-          {record.type === 'income' ? '+' : '-'}${amount.toFixed(2)}
+          {record.type === 'income' ? '+' : '-'}${(amount || 0).toFixed(2)}
         </Text>
       ),
     },
@@ -125,13 +125,17 @@ const Transactions: React.FC = () => {
       filters: [
         { text: '收入', value: 'income' },
         { text: '支出', value: 'expense' },
+        { text: '退款', value: 'refund' },
+        { text: '费用', value: 'fee' },
       ],
       render: (type: string) => {
         const typeConfig = {
           income: { text: '收入', color: 'success' },
           expense: { text: '支出', color: 'error' },
+          refund: { text: '退款', color: 'warning' },
+          fee: { text: '费用', color: 'processing' },
         };
-        const config = typeConfig[type as keyof typeof typeConfig];
+        const config = typeConfig[type as keyof typeof typeConfig] || { text: type, color: 'default' };
         return <Tag color={config.color}>{config.text}</Tag>;
       },
     },