feat: support json_serializable configuration (checked, explicit_to_json) in generated models

example/pubspec.lock

@@ -558,7 +558,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "3.1.0"
+    version: "3.1.4"
   term_glyph:
     dependency: transitive
     description:

lib/core/config.dart

@@ -54,6 +54,10 @@ class SwaggerConfig {
   static Map<String, Map<dynamic, EnumKeyMapping>>? get enumKeyMappings =>
       ConfigRepository.loadSync().enumKeyMappings;
 
+  /// 获取 JsonSerializable 配置（从配置文件读取）
+  static JsonSerializableConfig? get jsonSerializableConfig =>
+      ConfigRepository.loadSync().jsonSerializableConfig;
+
   /// 默认文档文件名
   static const String defaultDocumentationFile =
       'generated_api_documentation.md';

lib/core/config_repository.dart

@@ -17,6 +17,28 @@ class EnumKeyMapping {
   final String? description;
 }
 
+/// JSON Serializable 配置
+class JsonSerializableConfig {
+  const JsonSerializableConfig({
+    this.checked = false,
+    this.explicitToJson = false,
+    this.includeIfNull = true,
+  });
+
+  final bool checked;
+  final bool explicitToJson;
+  final bool includeIfNull;
+
+  static JsonSerializableConfig? fromMap(Map<String, dynamic>? map) {
+    if (map == null) return null;
+    return JsonSerializableConfig(
+      checked: map['checked'] as bool? ?? false,
+      explicitToJson: map['explicit_to_json'] as bool? ?? false,
+      includeIfNull: map['include_if_null'] as bool? ?? true,
+    );
+  }
+}
+
 /// 配置仓库
 /// 负责加载和提供配置信息
 class ConfigRepository {
@@ -292,6 +314,15 @@ class ConfigRepository {
     return api?['base_page_result_import'] as String? ?? '';
   }
 
+  /// 获取 JsonSerializable 配置
+  JsonSerializableConfig? get jsonSerializableConfig {
+    final generation = _config['generation'] as Map<String, dynamic>?;
+    final models = generation?['models'] as Map<String, dynamic>?;
+    final jsonSerializable =
+        models?['json_serializable'] as Map<String, dynamic>?;
+    return JsonSerializableConfig.fromMap(jsonSerializable);
+  }
+
   /// 获取枚举键名映射配置
   /// 返回格式: { "EnumName": { value: { "name": "KEY_NAME", "description": "描述" } } }
   Map<String, Map<dynamic, EnumKeyMapping>>? get enumKeyMappings {

lib/pipeline/generate/impl/model/model_content_builders.dart

@@ -127,6 +127,18 @@ String _generateAnnotatedModelCodeWithoutImports(
     buffer.writeln(StringHelper.generateComment(model.description));
   }
 
+  final jsonConfig = SwaggerConfig.jsonSerializableConfig;
+  if (jsonConfig != null) {
+    final params = <String>[];
+    if (jsonConfig.checked) params.add('checked: true');
+    if (jsonConfig.explicitToJson) params.add('explicitToJson: true');
+    if (!jsonConfig.includeIfNull) params.add('includeIfNull: false');
+
+    if (params.isNotEmpty) {
+      buffer.writeln('@JsonSerializable(${params.join(', ')})');
+    }
+  }
+
   buffer
     ..writeln('@freezed')
     ..writeln('abstract class $className with _\$$className {')

lib/pipeline/generate/impl/model/model_file_writers.dart

@@ -44,19 +44,17 @@ String buildSingleModelFile(
     ..writeln();
 
   if (!model.isEnum) {
-    buffer
-      ..writeln(
-        "import 'package:freezed_annotation/freezed_annotation.dart';",
-      )
-      ..writeln();
-  } else {
-    buffer
-      ..writeln(
-        "import 'package:json_annotation/json_annotation.dart';",
-      )
-      ..writeln();
+    buffer.writeln(
+      "import 'package:freezed_annotation/freezed_annotation.dart';",
+    );
   }
 
+  buffer
+    ..writeln(
+      "import 'package:json_annotation/json_annotation.dart';",
+    )
+    ..writeln();
+
   final importedTypes = generator.getImportedTypes(model);
   if (importedTypes.isNotEmpty) {
     buffer