chore: 初始化脚手架 — sunny_mochi 企业级 Flutter 模板

Core 基础设施：Flavor 三包体系、Drift+SQLCipher 加密数据库
7 拦截器 Dio 网络栈、CrashReporter 崩溃日志、Sealed Failure 错误体系
5 色板主题系统、Auth 认证骨架（Clean Architecture）、Dev Panel、Mock Adapter

通过验证：flutter analyze（0 errors）、flutter test（全绿）、staging APK 74.8MB

lib/features/auth/data/models/user_model.g.dart

@@ -0,0 +1,44 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'user_model.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_UserModel _$UserModelFromJson(Map<String, dynamic> json) => _UserModel(
+  userId: json['userId'] as String?,
+  username: json['username'] as String?,
+  realName: json['realName'] as String?,
+  phone: json['phone'] as String?,
+  avatar: json['avatar'] as String?,
+  token: json['token'] as String?,
+  tokenName: json['tokenName'] as String?,
+  refreshToken: json['refreshToken'] as String?,
+  email: json['email'] as String?,
+  birthday: json['birthday'] == null
+      ? null
+      : DateTime.parse(json['birthday'] as String),
+  gender: (json['gender'] as num?)?.toInt(),
+  employeeNo: json['employeeNo'] as String?,
+  company: json['company'] as String?,
+  department: json['department'] as String?,
+);
+
+Map<String, dynamic> _$UserModelToJson(_UserModel instance) =>
+    <String, dynamic>{
+      'userId': instance.userId,
+      'username': instance.username,
+      'realName': instance.realName,
+      'phone': instance.phone,
+      'avatar': instance.avatar,
+      'token': instance.token,
+      'tokenName': instance.tokenName,
+      'refreshToken': instance.refreshToken,
+      'email': instance.email,
+      'birthday': instance.birthday?.toIso8601String(),
+      'gender': instance.gender,
+      'employeeNo': instance.employeeNo,
+      'company': instance.company,
+      'department': instance.department,
+    };