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/profile_card.dart

@@ -1,60 +1,59 @@
 import 'package:flutter/material.dart';
 import 'package:lucide_icons_flutter/lucide_icons.dart';
-import '../../../../core/theme/app_spacing.dart';
 import '../../../../core/theme/app_theme.dart';
-import '../../../../core/theme/app_theme_extension.dart';
 import 'avatar_circle.dart';
 
-/// 用戶資料卡片 - 頭像 + 用戶名 + 徽章 + chevron
+/// 用户资料卡片
 class ProfileCard extends StatelessWidget {
   final dynamic user;
   const ProfileCard({super.key, required this.user});
 
   @override
   Widget build(BuildContext context) {
+    final colorScheme = Theme.of(context).colorScheme;
+
     return Container(
       width: double.infinity,
-      padding: const EdgeInsets.all(20),
+      padding: const EdgeInsets.all(16),
       decoration: BoxDecoration(
-        color: context.appColors.surfaceCard,
-        borderRadius: BorderRadius.circular(AppRadius.lg),
+        color: colorScheme.surface,
+        borderRadius: BorderRadius.circular(14),
         border: Border.all(
-          color: context.appColors.ghostBorder,
+          color: colorScheme.outlineVariant.withValues(alpha: 0.5),
         ),
       ),
       child: Row(
         children: [
-          // Avatar
           AvatarCircle(
-            radius: 24,
-            fontSize: 18,
+            radius: 22,
+            fontSize: 16,
             text: user?.avatarText,
           ),
           const SizedBox(width: 12),
-          // Name + badge column
           Expanded(
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
                 Text(
                   user?.username ?? '未登錄',
-                  style: AppTextStyles.headlineLarge(context),
+                  style: AppTextStyles.bodyLarge(context).copyWith(
+                    fontWeight: FontWeight.w600,
+                  ),
                 ),
-                const SizedBox(height: 4),
+                const SizedBox(height: 2),
                 Text(
                   '普通用戶',
-                  style: AppTextStyles.bodyMedium(context).copyWith(
-                    fontWeight: FontWeight.normal,
+                  style: AppTextStyles.bodySmall(context).copyWith(
+                    color: colorScheme.onSurfaceVariant,
                   ),
                 ),
               ],
             ),
           ),
-          // Chevron
           Icon(
             LucideIcons.chevronRight,
             size: 16,
-            color: context.colors.onSurfaceVariant,
+            color: colorScheme.onSurfaceVariant,
           ),
         ],
       ),