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/providers/auth_provider.dart

@@ -0,0 +1,151 @@
+import 'dart:convert';
+import 'package:flutter/material.dart';
+import '../core/network/dio_client.dart';
+import '../core/storage/local_storage.dart';
+import '../data/models/user.dart';
+import '../data/services/user_service.dart';
+
+/// 认证状态管理
+class AuthProvider extends ChangeNotifier {
+  final UserService _userService;
+
+  User? _user;
+  bool _isLoggedIn = false;
+  bool _isLoading = false;
+  String? _token;
+
+  AuthProvider(this._userService) {
+    _checkAuth();
+  }
+
+  // Getters
+  User? get user => _user;
+  bool get isLoggedIn => _isLoggedIn;
+  bool get isLoading => _isLoading;
+  String? get token => _token;
+
+  /// 检查登录状态
+  Future<void> _checkAuth() async {
+    _isLoading = true;
+    notifyListeners();
+
+    _token = LocalStorage.getToken();
+    _isLoggedIn = _token != null && _token!.isNotEmpty;
+
+    if (_isLoggedIn) {
+      final userJson = LocalStorage.getUserInfo();
+      if (userJson != null) {
+        _user = User.fromJson(userJson);
+      }
+    }
+
+    _isLoading = false;
+    notifyListeners();
+  }
+
+  /// 登录
+  Future<ApiResponse<User>> login(String username, String password) async {
+    _isLoading = true;
+    notifyListeners();
+
+    try {
+      final response = await _userService.login(username, password);
+
+      if (response.success && response.data != null) {
+        _token = response.data!['token'] as String?;
+        final userJson = response.data!['user'] as Map<String, dynamic>? ??
+            response.data!['userInfo'] as Map<String, dynamic>?;
+
+        if (_token != null) {
+          await LocalStorage.saveToken(_token!);
+        }
+        if (userJson != null) {
+          await LocalStorage.saveUserInfo(userJson);
+          _user = User.fromJson(userJson);
+        }
+
+        _isLoggedIn = true;
+        notifyListeners();
+        return ApiResponse.success(_user!, response.message);
+      }
+
+      _isLoading = false;
+      notifyListeners();
+      return ApiResponse.fail(response.message ?? '登录失败');
+    } catch (e) {
+      _isLoading = false;
+      notifyListeners();
+      return ApiResponse.fail('登录失败: $e');
+    }
+  }
+
+  /// 注册
+  Future<ApiResponse<User>> register(String username, String password) async {
+    _isLoading = true;
+    notifyListeners();
+
+    try {
+      final response = await _userService.register(username, password);
+
+      if (response.success && response.data != null) {
+        _token = response.data!['token'] as String?;
+        final userJson = response.data!['userInfo'] as Map<String, dynamic>?;
+
+        if (_token != null) {
+          await LocalStorage.saveToken(_token!);
+        }
+        if (userJson != null) {
+          await LocalStorage.saveUserInfo(userJson);
+          _user = User.fromJson(userJson);
+        }
+
+        _isLoggedIn = true;
+        notifyListeners();
+        return ApiResponse.success(_user!, response.message);
+      }
+
+      _isLoading = false;
+      notifyListeners();
+      return ApiResponse.fail(response.message ?? '注册失败');
+    } catch (e) {
+      _isLoading = false;
+      notifyListeners();
+      return ApiResponse.fail('注册失败: $e');
+    }
+  }
+
+  /// 退出登录
+  Future<void> logout() async {
+    _isLoading = true;
+    notifyListeners();
+
+    try {
+      await _userService.logout();
+    } catch (_) {
+      // 忽略退出登录的接口错误
+    }
+
+    await LocalStorage.clearUserData();
+    _user = null;
+    _token = null;
+    _isLoggedIn = false;
+    _isLoading = false;
+    notifyListeners();
+  }
+
+  /// 刷新用户信息
+  Future<void> refreshUserInfo() async {
+    if (!_isLoggedIn) return;
+
+    try {
+      final response = await _userService.getUserInfo();
+      if (response.success && response.data != null) {
+        _user = response.data;
+        await LocalStorage.saveUserInfo(_user!.toJson());
+        notifyListeners();
+      }
+    } catch (_) {
+      // 忽略错误
+    }
+  }
+}