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/models/account_models.dart

@@ -0,0 +1,166 @@
+/// 资产总览模型
+class AssetOverview {
+  final String totalAsset;
+  final String fundBalance;
+  final String tradeBalance;
+  final String totalProfit;
+
+  AssetOverview({
+    required this.totalAsset,
+    required this.fundBalance,
+    required this.tradeBalance,
+    required this.totalProfit,
+  });
+
+  factory AssetOverview.fromJson(Map<String, dynamic> json) {
+    return AssetOverview(
+      totalAsset: json['totalAsset']?.toString() ?? '0.00',
+      fundBalance: json['fundBalance']?.toString() ?? '0.00',
+      tradeBalance: json['tradeBalance']?.toString() ?? '0.00',
+      totalProfit: json['totalProfit']?.toString() ?? '0.00',
+    );
+  }
+}
+
+/// 资金账户模型
+class AccountFund {
+  final int id;
+  final int userId;
+  final String balance;
+  final String frozenBalance;
+  final DateTime? updateTime;
+
+  AccountFund({
+    required this.id,
+    required this.userId,
+    required this.balance,
+    required this.frozenBalance,
+    this.updateTime,
+  });
+
+  factory AccountFund.fromJson(Map<String, dynamic> json) {
+    return AccountFund(
+      id: json['id'] as int? ?? 0,
+      userId: json['userId'] as int? ?? 0,
+      balance: json['balance']?.toString() ?? '0.00',
+      frozenBalance: json['frozenBalance']?.toString() ?? '0.00',
+      updateTime: json['updateTime'] != null
+          ? DateTime.tryParse(json['updateTime'])
+          : null,
+    );
+  }
+}
+
+/// 交易账户模型（持仓）
+class AccountTrade {
+  final int id;
+  final int userId;
+  final String coinCode;
+  final String quantity;
+  final String avgPrice;
+  final String totalCost;
+  final String currentValue;
+  final String profit;
+  final double profitRate;
+  final DateTime? updateTime;
+
+  AccountTrade({
+    required this.id,
+    required this.userId,
+    required this.coinCode,
+    required this.quantity,
+    required this.avgPrice,
+    required this.totalCost,
+    required this.currentValue,
+    required this.profit,
+    required this.profitRate,
+    this.updateTime,
+  });
+
+  factory AccountTrade.fromJson(Map<String, dynamic> json) {
+    return AccountTrade(
+      id: json['id'] as int? ?? 0,
+      userId: json['userId'] as int? ?? 0,
+      coinCode: json['coinCode'] as String? ?? '',
+      quantity: json['quantity']?.toString() ?? '0',
+      avgPrice: json['avgPrice']?.toString() ?? '0.00',
+      totalCost: json['totalCost']?.toString() ?? '0.00',
+      currentValue: json['currentValue']?.toString() ?? '0.00',
+      profit: json['profit']?.toString() ?? '0.00',
+      profitRate: (json['profitRate'] as num?)?.toDouble() ?? 0,
+      updateTime: json['updateTime'] != null
+          ? DateTime.tryParse(json['updateTime'])
+          : null,
+    );
+  }
+
+  /// 格式化盈亏率
+  String get formattedProfitRate {
+    final prefix = profitRate >= 0 ? '+' : '';
+    return '$prefix${profitRate.toStringAsFixed(2)}%';
+  }
+
+  /// 是否盈利
+  bool get isProfit => profitRate >= 0;
+}
+
+/// 资金流水模型
+class AccountFlow {
+  final int id;
+  final int userId;
+  final String flowType;
+  final String amount;
+  final String balanceBefore;
+  final String balanceAfter;
+  final String remark;
+  final DateTime? createTime;
+
+  AccountFlow({
+    required this.id,
+    required this.userId,
+    required this.flowType,
+    required this.amount,
+    required this.balanceBefore,
+    required this.balanceAfter,
+    required this.remark,
+    this.createTime,
+  });
+
+  factory AccountFlow.fromJson(Map<String, dynamic> json) {
+    return AccountFlow(
+      id: json['id'] as int? ?? 0,
+      userId: json['userId'] as int? ?? 0,
+      flowType: json['flowType']?.toString() ?? '',
+      amount: json['amount']?.toString() ?? '0.00',
+      balanceBefore: json['balanceBefore']?.toString() ?? '0.00',
+      balanceAfter: json['balanceAfter']?.toString() ?? '0.00',
+      remark: json['remark']?.toString() ?? '',
+      createTime: json['createTime'] != null
+          ? DateTime.tryParse(json['createTime'])
+          : null,
+    );
+  }
+
+  /// 流水类型文字
+  String get flowTypeText {
+    switch (flowType) {
+      case '1':
+        return '充值';
+      case '2':
+        return '提现';
+      case '3':
+        return '转入交易账户';
+      case '4':
+        return '从交易账户转出';
+      case '5':
+        return '卖出收入';
+      case '6':
+        return '买入支出';
+      default:
+        return '未知';
+    }
+  }
+
+  /// 是否为收入
+  bool get isIncome => ['1', '3', '5'].contains(flowType);
+}