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/lib/data/services/fund_service.dart

@@ -0,0 +1,80 @@
+import '../../core/constants/api_endpoints.dart';
+import '../../core/network/dio_client.dart';
+import '../models/order_models.dart';
+
+/// 充提服务
+class FundService {
+  final DioClient _client;
+
+  FundService(this._client);
+
+  /// 申请充值
+  Future<ApiResponse<Map<String, dynamic>>> deposit({
+    required String amount,
+    String? remark,
+  }) async {
+    return _client.post<Map<String, dynamic>>(
+      ApiEndpoints.deposit,
+      data: {
+        'amount': amount,
+        if (remark != null) 'remark': remark,
+      },
+    );
+  }
+
+  /// 申请提现
+  Future<ApiResponse<Map<String, dynamic>>> withdraw({
+    required String amount,
+    String? remark,
+  }) async {
+    return _client.post<Map<String, dynamic>>(
+      ApiEndpoints.withdraw,
+      data: {
+        'amount': amount,
+        if (remark != null) 'remark': remark,
+      },
+    );
+  }
+
+  /// 取消订单
+  Future<ApiResponse<void>> cancelOrder(String orderNo) async {
+    return _client.post<void>(
+      ApiEndpoints.cancelOrder,
+      data: {'orderNo': orderNo},
+    );
+  }
+
+  /// 获取充提记录
+  Future<ApiResponse<Map<String, dynamic>>> getOrders({
+    int? type,
+    int pageNum = 1,
+    int pageSize = 20,
+  }) async {
+    final params = <String, dynamic>{
+      'pageNum': pageNum,
+      'pageSize': pageSize,
+    };
+    if (type != null) params['type'] = type;
+
+    return _client.get<Map<String, dynamic>>(
+      ApiEndpoints.fundOrders,
+      queryParameters: params,
+    );
+  }
+
+  /// 获取充提订单详情
+  Future<ApiResponse<OrderFund>> getOrderDetail(String orderNo) async {
+    final response = await _client.get<Map<String, dynamic>>(
+      ApiEndpoints.fundOrders,
+      queryParameters: {'orderNo': orderNo},
+    );
+
+    if (response.success && response.data != null) {
+      return ApiResponse.success(
+        OrderFund.fromJson(response.data!),
+        response.message,
+      );
+    }
+    return ApiResponse.fail(response.message ?? '获取订单详情失败');
+  }
+}