feat:更新统计模块

lib/models/stats.dart

@@ -0,0 +1,34 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'stats.g.dart';
+
+@JsonSerializable()
+class SummaryStats {
+  final int recipeCount;
+  final int categoryCount;
+  final int workCount;
+
+  const SummaryStats({
+    required this.recipeCount,
+    required this.categoryCount,
+    required this.workCount,
+  });
+
+  factory SummaryStats.fromJson(Map<String, dynamic> json) =>
+      _$SummaryStatsFromJson(json);
+
+  Map<String, dynamic> toJson() => _$SummaryStatsToJson(this);
+}
+
+@JsonSerializable()
+class ChartData {
+  final String name;
+  final double value;
+
+  const ChartData({required this.name, required this.value});
+
+  factory ChartData.fromJson(Map<String, dynamic> json) =>
+      _$ChartDataFromJson(json);
+
+  Map<String, dynamic> toJson() => _$ChartDataToJson(this);
+}

lib/models/stats.g.dart

@@ -0,0 +1,30 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'stats.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+SummaryStats _$SummaryStatsFromJson(Map<String, dynamic> json) => SummaryStats(
+  recipeCount: (json['recipeCount'] as num).toInt(),
+  categoryCount: (json['categoryCount'] as num).toInt(),
+  workCount: (json['workCount'] as num).toInt(),
+);
+
+Map<String, dynamic> _$SummaryStatsToJson(SummaryStats instance) =>
+    <String, dynamic>{
+      'recipeCount': instance.recipeCount,
+      'categoryCount': instance.categoryCount,
+      'workCount': instance.workCount,
+    };
+
+ChartData _$ChartDataFromJson(Map<String, dynamic> json) => ChartData(
+  name: json['name'] as String,
+  value: (json['value'] as num).toDouble(),
+);
+
+Map<String, dynamic> _$ChartDataToJson(ChartData instance) => <String, dynamic>{
+  'name': instance.name,
+  'value': instance.value,
+};