create project

frontend/lib/models/bill.dart

@@ -0,0 +1,48 @@
+enum BillType { expense, income }
+
+class Bill {
+  final String id;
+  final String userId;
+  final String? familyId;
+  final BillType type;
+  final double amount;
+  final String category;
+  final String note;
+  final String emoji;
+  final String time;
+  final String date;
+  final String createdAt;
+
+  const Bill({
+    required this.id,
+    required this.userId,
+    this.familyId,
+    required this.type,
+    required this.amount,
+    required this.category,
+    this.note = '',
+    this.emoji = '📝',
+    required this.time,
+    required this.date,
+    this.createdAt = '',
+  });
+
+  bool get isExpense => type == BillType.expense;
+  bool get isIncome => type == BillType.income;
+
+  factory Bill.fromJson(Map<String, dynamic> json) {
+    return Bill(
+      id: json['id'] as String? ?? '',
+      userId: json['userId'] as String? ?? '',
+      familyId: json['familyId'] as String?,
+      type: json['type'] as String? == 'income' ? BillType.income : BillType.expense,
+      amount: (json['amount'] as num?)?.toDouble() ?? 0,
+      category: json['category'] as String? ?? '',
+      note: json['note'] as String? ?? '',
+      emoji: json['emoji'] as String? ?? '📝',
+      time: json['time'] as String? ?? '00:00',
+      date: json['date'] as String? ?? '',
+      createdAt: json['createdAt'] as String? ?? '',
+    );
+  }
+}