feat: 充值/提现页面改为独立全屏页面，优化Toast提示

flutter_monisuo/lib/ui/pages/orders/fund_orders_page.dart

@@ -2,7 +2,6 @@ import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:lucide_icons_flutter/lucide_icons.dart';
-import 'package:bot_toast/bot_toast.dart';
 import 'package:provider/provider.dart';
 import '../../../core/theme/app_color_scheme.dart';
 import '../../../core/theme/app_spacing.dart';
@@ -333,7 +332,7 @@ class _FundOrdersPageState extends State<FundOrdersPage> {
             trailing: GestureDetector(
               onTap: () {
                 Clipboard.setData(ClipboardData(text: order.walletAddress!));
-                ToastUtils.show('地址已複製');
+                ToastUtils.showSuccess('地址已複製');
               },
               child: Icon(LucideIcons.copy, size: 14, color: context.appColors.onSurfaceMuted),
             ),
@@ -474,7 +473,11 @@ class _FundOrdersPageState extends State<FundOrdersPage> {
     if (confirmed == true && mounted) {
       final response = await context.read<AssetProvider>().confirmPay(order.orderNo);
       if (mounted) {
-        BotToast.showText(text: response.success ? '確認成功，請等待審核' : response.message ?? '確認失敗');
+        if (response.success) {
+          ToastUtils.showSuccess('確認成功，請等待審核');
+        } else {
+          ToastUtils.showError(response.message ?? '確認失敗');
+        }
       }
     }
   }
@@ -490,7 +493,11 @@ class _FundOrdersPageState extends State<FundOrdersPage> {
     if (confirmed == true && mounted) {
       final response = await context.read<AssetProvider>().cancelOrder(order.orderNo);
       if (mounted) {
-        BotToast.showText(text: response.success ? '訂單已取消' : response.message ?? '取消失敗');
+        if (response.success) {
+          ToastUtils.showSuccess('訂單已取消');
+        } else {
+          ToastUtils.showError(response.message ?? '取消失敗');
+        }
       }
     }
   }