统一弹窗风格：Material Design 3 规范，消除颜色不一致

- 所有 AlertDialog 替换为 ModernDialog
- ConfirmDialog/AssetDialogs 去掉 GlassPanel，统一 surfaceContainer 背景
- 按钮统一 FilledButton + TextButton
- 修复 import 路径

flutter_monisuo/lib/ui/pages/trade/components/confirm_dialog.dart

@@ -2,8 +2,6 @@ import 'package:flutter/material.dart';
 import '../../../../core/theme/app_spacing.dart';
 import '../../../../core/theme/app_theme.dart';
 import '../../../../core/theme/app_theme_extension.dart';
-import '../../../components/glass_panel.dart';
-import '../../../components/neon_glow.dart';
 
 /// 交易確認對話框
 ///
@@ -27,15 +25,19 @@ class ConfirmDialog extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final theme = Theme.of(context);
     final actionColor = isBuy
         ? context.appColors.up
         : context.appColors.down;
 
     return Dialog(
-      backgroundColor: Colors.transparent,
-      child: GlassPanel(
-        borderRadius: BorderRadius.circular(AppRadius.lg),
-        padding: EdgeInsets.all(AppSpacing.lg),
+      shape: RoundedRectangleBorder(
+        borderRadius: BorderRadius.circular(AppRadius.xl),
+      ),
+      backgroundColor: theme.colorScheme.surfaceContainer,
+      child: Container(
+        padding: const EdgeInsets.all(AppSpacing.lg),
+        constraints: const BoxConstraints(maxWidth: 400),
         child: Column(
           mainAxisSize: MainAxisSize.min,
           crossAxisAlignment: CrossAxisAlignment.start,
@@ -59,22 +61,23 @@ class ConfirmDialog extends StatelessWidget {
             Row(
               children: [
                 Expanded(
-                  child: NeonButton(
-                    text: '取消',
-                    type: NeonButtonType.outline,
+                  child: TextButton(
                     onPressed: () => Navigator.of(context).pop(false),
-                    height: 44,
-                    showGlow: false,
+                    style: TextButton.styleFrom(
+                      minimumSize: const Size.fromHeight(44),
+                    ),
+                    child: const Text('取消'),
                   ),
                 ),
                 SizedBox(width: AppSpacing.sm),
                 Expanded(
-                  child: NeonButton(
-                    text: '確認${isBuy ? '買入' : '賣出'}',
-                    type: isBuy ? NeonButtonType.tertiary : NeonButtonType.error,
+                  child: FilledButton(
                     onPressed: () => Navigator.of(context).pop(true),
-                    height: 44,
-                    showGlow: true,
+                    style: FilledButton.styleFrom(
+                      backgroundColor: actionColor,
+                      minimumSize: const Size.fromHeight(44),
+                    ),
+                    child: Text('確認${isBuy ? '買入' : '賣出'}'),
                   ),
                 ),
               ],