first commit

lib/models/fuel_entry.dart

@@ -0,0 +1,39 @@
+class FuelEntry {
+  final String id;
+  final String vehicleId;
+  final DateTime date;
+  final double gallons;
+  final double pricePerGallon;
+  final double totalCost;
+  final String? receiptImagePath;
+
+  FuelEntry({
+    required this.id,
+    required this.vehicleId,
+    required this.date,
+    required this.gallons,
+    required this.pricePerGallon,
+    required this.totalCost,
+    this.receiptImagePath,
+  });
+
+  Map<String, dynamic> toJson() => {
+        'id': id,
+        'vehicleId': vehicleId,
+        'date': date.toIso8601String(),
+        'gallons': gallons,
+        'pricePerGallon': pricePerGallon,
+        'totalCost': totalCost,
+        'receiptImagePath': receiptImagePath,
+      };
+
+  factory FuelEntry.fromJson(Map<String, dynamic> json) => FuelEntry(
+        id: json['id'] as String,
+        vehicleId: json['vehicleId'] as String,
+        date: DateTime.parse(json['date'] as String),
+        gallons: (json['gallons'] as num).toDouble(),
+        pricePerGallon: (json['pricePerGallon'] as num).toDouble(),
+        totalCost: (json['totalCost'] as num).toDouble(),
+        receiptImagePath: json['receiptImagePath'] as String?,
+      );
+}