基本完成

lib/api/dto/base_dto.dart

@@ -0,0 +1,15 @@
+class ApiDto<T> {
+  final int code;
+  final String message;
+  final T data;
+
+  ApiDto({required this.code, required this.message, required this.data});
+
+  factory ApiDto.fromJson(Map<String, dynamic> json) {
+    return ApiDto<T>(
+      code: json['code'],
+      message: json['message'],
+      data: json['data'],
+    );
+  }
+}