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/asset_service.dart

@@ -0,0 +1,86 @@
+import '../../core/constants/api_endpoints.dart';
+import '../../core/network/dio_client.dart';
+import '../models/account_models.dart';
+
+/// 资产服务
+class AssetService {
+  final DioClient _client;
+
+  AssetService(this._client);
+
+  /// 获取资产总览
+  Future<ApiResponse<AssetOverview>> getOverview() async {
+    final response = await _client.get<Map<String, dynamic>>(
+      ApiEndpoints.assetOverview,
+    );
+
+    if (response.success && response.data != null) {
+      return ApiResponse.success(
+        AssetOverview.fromJson(response.data!),
+        response.message,
+      );
+    }
+    return ApiResponse.fail(response.message ?? '获取资产总览失败');
+  }
+
+  /// 获取资金账户
+  Future<ApiResponse<AccountFund>> getFundAccount() async {
+    final response = await _client.get<Map<String, dynamic>>(
+      ApiEndpoints.fundAccount,
+    );
+
+    if (response.success && response.data != null) {
+      return ApiResponse.success(
+        AccountFund.fromJson(response.data!),
+        response.message,
+      );
+    }
+    return ApiResponse.fail(response.message ?? '获取资金账户失败');
+  }
+
+  /// 获取交易账户
+  Future<ApiResponse<List<AccountTrade>>> getTradeAccount() async {
+    final response = await _client.get<Map<String, dynamic>>(
+      ApiEndpoints.tradeAccount,
+    );
+
+    if (response.success && response.data != null) {
+      final list = response.data!['list'] as List?;
+      final accounts = list?.map((e) => AccountTrade.fromJson(e as Map<String, dynamic>)).toList() ?? [];
+      return ApiResponse.success(accounts, response.message);
+    }
+    return ApiResponse.fail(response.message ?? '获取交易账户失败');
+  }
+
+  /// 资金划转
+  Future<ApiResponse<void>> transfer({
+    required int direction,
+    required String amount,
+  }) async {
+    return _client.post<void>(
+      ApiEndpoints.transfer,
+      data: {
+        'direction': direction,
+        'amount': amount,
+      },
+    );
+  }
+
+  /// 获取资金流水
+  Future<ApiResponse<Map<String, dynamic>>> getFlow({
+    int? flowType,
+    int pageNum = 1,
+    int pageSize = 20,
+  }) async {
+    final params = <String, dynamic>{
+      'pageNum': pageNum,
+      'pageSize': pageSize,
+    };
+    if (flowType != null) params['flowType'] = flowType;
+
+    return _client.get<Map<String, dynamic>>(
+      ApiEndpoints.assetFlow,
+      queryParameters: params,
+    );
+  }
+}