docs: 删除过时的功能规格文档

feat(ui): 重构资产页面UI，移除shadcn_ui依赖并简化设计

- 删除三个过时的功能规格文档（apply-new-styles.md、bottom-nav-labels.md、theme-dynamic-colors.md）
- 重构充值页面(deposit_page.dart)：移除shadcn_ui依赖，简化表单验证和UI设计，使用动态主题颜色
- 重构划转页面(transfer_page.dart)：移除复杂动画和shadcn_ui依赖，简化UI布局和交互逻辑
- 重构提现页面(withdraw_page.dart)：移除shadcn_ui依赖，简化表单验证和网络选择器
- 重构我的页面相关组件：统一使用动态主题颜色，简化菜单项设计和KYC状态显示
- 所有页面现在使用Theme.of(context)获取动态颜色，支持明暗主题切换
- 移除硬编码的颜色引用，提高代码可维护性和主题一致性

flutter_monisuo/lib/ui/pages/mine/components/logout_button.dart

@@ -1,34 +1,29 @@
 import 'package:flutter/material.dart';
-import '../../../../core/theme/app_color_scheme.dart';
-import '../../../../core/theme/app_spacing.dart';
-import '../../../../core/theme/app_theme.dart';
 
-/// 退出登錄按鈕
+/// 退出登录按钮
 class LogoutButton extends StatelessWidget {
   final VoidCallback onLogout;
   const LogoutButton({super.key, required this.onLogout});
 
   @override
   Widget build(BuildContext context) {
-    return GestureDetector(
-      onTap: onLogout,
-      child: Container(
-        width: double.infinity,
-        height: 48,
-        decoration: BoxDecoration(
-          color: AppColorScheme.down.withOpacity(0.05),
-          borderRadius: BorderRadius.circular(AppRadius.lg),
-          border: Border.all(
-            color: AppColorScheme.down.withOpacity(0.15),
+    final colorScheme = Theme.of(context).colorScheme;
+
+    return SizedBox(
+      width: double.infinity,
+      height: 48,
+      child: OutlinedButton(
+        onPressed: onLogout,
+        style: OutlinedButton.styleFrom(
+          foregroundColor: colorScheme.error,
+          side: BorderSide(color: colorScheme.error),
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(14),
           ),
         ),
-        child: Center(
-          child: Text(
-            '退出登錄',
-            style: AppTextStyles.headlineMedium(context).copyWith(
-              color: AppColorScheme.down,
-            ),
-          ),
+        child: const Text(
+          '退出登錄',
+          style: TextStyle(fontSize: 15, fontWeight: FontWeight.w500),
         ),
       ),
     );