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/core/theme/app_theme.dart

@@ -0,0 +1,149 @@
+import 'package:flutter/material.dart';
+import '../constants/app_colors.dart';
+
+/// 应用主题配置
+class AppTheme {
+  AppTheme._();
+
+  /// 深色主题
+  static ThemeData get darkTheme {
+    return ThemeData(
+      useMaterial3: true,
+      brightness: Brightness.dark,
+      scaffoldBackgroundColor: AppColors.background,
+      primaryColor: AppColors.primary,
+      colorScheme: const ColorScheme.dark(
+        primary: AppColors.primary,
+        secondary: AppColors.primaryLight,
+        error: AppColors.error,
+        surface: AppColors.cardBackground,
+      ),
+      appBarTheme: const AppBarTheme(
+        backgroundColor: AppColors.background,
+        foregroundColor: AppColors.textPrimary,
+        elevation: 0,
+        centerTitle: true,
+        titleTextStyle: TextStyle(
+          fontSize: 18,
+          fontWeight: FontWeight.w600,
+          color: AppColors.textPrimary,
+        ),
+      ),
+      inputDecorationTheme: InputDecorationTheme(
+        filled: true,
+        fillColor: AppColors.cardBackground,
+        border: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(12),
+          borderSide: const BorderSide(color: AppColors.border),
+        ),
+        enabledBorder: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(12),
+          borderSide: const BorderSide(color: AppColors.border),
+        ),
+        focusedBorder: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(12),
+          borderSide: const BorderSide(color: AppColors.primary),
+        ),
+        hintStyle: const TextStyle(color: AppColors.textHint),
+        contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
+      ),
+      elevatedButtonTheme: ElevatedButtonThemeData(
+        style: ElevatedButton.styleFrom(
+          backgroundColor: AppColors.primary,
+          foregroundColor: Colors.white,
+          minimumSize: const Size(double.infinity, 48),
+          padding: const EdgeInsets.symmetric(vertical: 14),
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(12),
+          ),
+          textStyle: const TextStyle(
+            fontSize: 16,
+            fontWeight: FontWeight.w600,
+          ),
+        ),
+      ),
+      textButtonTheme: TextButtonThemeData(
+        style: TextButton.styleFrom(
+          foregroundColor: AppColors.primary,
+        ),
+      ),
+      dividerTheme: const DividerThemeData(
+        color: AppColors.border,
+        thickness: 1,
+      ),
+      cardTheme: CardTheme(
+        color: AppColors.cardBackground,
+        elevation: 0,
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(16),
+        ),
+      ),
+    );
+  }
+}
+
+/// 文本样式
+class AppTextStyles {
+  AppTextStyles._();
+
+  static const TextStyle heading1 = TextStyle(
+    fontSize: 28,
+    fontWeight: FontWeight.bold,
+    color: AppColors.textPrimary,
+  );
+
+  static const TextStyle heading2 = TextStyle(
+    fontSize: 24,
+    fontWeight: FontWeight.bold,
+    color: AppColors.textPrimary,
+  );
+
+  static const TextStyle heading3 = TextStyle(
+    fontSize: 18,
+    fontWeight: FontWeight.w600,
+    color: AppColors.textPrimary,
+  );
+
+  static const TextStyle body1 = TextStyle(
+    fontSize: 16,
+    color: AppColors.textPrimary,
+  );
+
+  static const TextStyle body2 = TextStyle(
+    fontSize: 14,
+    color: AppColors.textPrimary,
+  );
+
+  static const TextStyle caption = TextStyle(
+    fontSize: 12,
+    color: AppColors.textSecondary,
+  );
+
+  static const TextStyle hint = TextStyle(
+    fontSize: 14,
+    color: AppColors.textHint,
+  );
+}
+
+/// 间距常量
+class AppSpacing {
+  AppSpacing._();
+
+  static const double xs = 4.0;
+  static const double sm = 8.0;
+  static const double md = 16.0;
+  static const double lg = 24.0;
+  static const double xl = 32.0;
+  static const double xxl = 48.0;
+}
+
+/// 圆角常量
+class AppRadius {
+  AppRadius._();
+
+  static const double sm = 8.0;
+  static const double md = 12.0;
+  static const double lg = 16.0;
+  static const double xl = 24.0;
+  static const double full = 999.0;
+}