/// OpenHarmony 交易记录模型
class Transaction {
final String id;
final String title;
final double amount;
final DateTime date;
final TransactionType type;
final String category;
final String? note;
final List tags;
final bool isPinned; // 新增：是否置顶

Transaction({
required this.id,
required this.title,
required this.amount,
required this.date,
required this.type,
required this.category,
this.note,
this.tags = const [],
this.isPinned = false, // 默认不置顶
});
}

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