refactor: 将前端从 uni-app x 重构为 Flutter

变更内容:
- 删除 uni-app x 项目 (app/ 目录)
- 新增 Flutter 项目 (flutter_monisuo/ 目录)
- 新增部署脚本 (deploy/ 目录)

Flutter 项目功能:
- 用户登录/注册
- 首页资产概览
- 行情币种列表
- 交易买卖操作
- 资产账户管理
- 充值/提现/划转
- 深色主题
- JWT Token 认证

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

flutter_monisuo/pubspec.yaml

@@ -0,0 +1,52 @@
+name: flutter_monisuo
+description: 模拟所 - 虚拟货币模拟交易平台
+publish_to: 'none'
+version: 1.0.0+1
+
+environment:
+  sdk: '>=3.0.0 <4.0.0'
+
+dependencies:
+  flutter:
+    sdk: flutter
+
+  # 状态管理
+  provider: ^6.1.1
+
+  # 网络请求
+  dio: ^5.4.0
+
+  # 本地存储
+  shared_preferences: ^2.2.2
+
+  # 路由管理
+  go_router: ^13.0.0
+
+  # UI组件
+  flutter_svg: ^2.0.9
+  shimmer: ^3.0.0
+  pull_to_refresh: ^2.0.0
+
+  # 工具类
+  intl: ^0.18.1
+  decimal: ^2.3.3
+
+  # 图标
+  cupertino_icons: ^1.0.6
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+  flutter_lints: ^3.0.1
+
+flutter:
+  uses-material-design: true
+
+  assets:
+    - assets/images/
+    - assets/icons/tabbar/
+
+  fonts:
+    - family: AppIcons
+      fonts:
+        - asset: assets/fonts/AppIcons.ttf