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/market_service.dart

@@ -0,0 +1,55 @@
+import '../../core/constants/api_endpoints.dart';
+import '../../core/network/dio_client.dart';
+import '../models/coin.dart';
+
+/// 行情服务
+class MarketService {
+  final DioClient _client;
+
+  MarketService(this._client);
+
+  /// 获取币种列表
+  Future<ApiResponse<List<Coin>>> getCoinList() async {
+    final response = await _client.get<Map<String, dynamic>>(
+      ApiEndpoints.coinList,
+    );
+
+    if (response.success && response.data != null) {
+      final list = response.data!['list'] as List?;
+      final coins = list?.map((e) => Coin.fromJson(e as Map<String, dynamic>)).toList() ?? [];
+      return ApiResponse.success(coins, response.message);
+    }
+    return ApiResponse.fail(response.message ?? '获取币种列表失败');
+  }
+
+  /// 获取币种详情
+  Future<ApiResponse<Coin>> getCoinDetail(String code) async {
+    final response = await _client.get<Map<String, dynamic>>(
+      ApiEndpoints.coinDetail,
+      queryParameters: {'code': code},
+    );
+
+    if (response.success && response.data != null) {
+      return ApiResponse.success(
+        Coin.fromJson(response.data!),
+        response.message,
+      );
+    }
+    return ApiResponse.fail(response.message ?? '获取币种详情失败');
+  }
+
+  /// 搜索币种
+  Future<ApiResponse<List<Coin>>> searchCoins(String keyword) async {
+    final response = await _client.get<Map<String, dynamic>>(
+      ApiEndpoints.coinSearch,
+      queryParameters: {'keyword': keyword},
+    );
+
+    if (response.success && response.data != null) {
+      final list = response.data!['list'] as List?;
+      final coins = list?.map((e) => Coin.fromJson(e as Map<String, dynamic>)).toList() ?? [];
+      return ApiResponse.success(coins, response.message);
+    }
+    return ApiResponse.fail(response.message ?? '搜索失败');
+  }
+}