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/mine/kyc_page.dart

@@ -10,6 +10,7 @@ import '../../../core/theme/app_theme.dart';
 import '../../../providers/auth_provider.dart';
 import '../../components/glass_panel.dart';
 import '../../components/neon_glow.dart';
+import '../../shared/modern_dialog.dart';
 
 /// KYC 實名認證頁面
 class KycPage extends StatefulWidget {
@@ -431,61 +432,41 @@ class _KycPageState extends State<KycPage> {
       if (!mounted) return;
 
       if (response.success) {
-        showDialog(
+        ModernDialog.show(
           context: context,
-          builder: (ctx) => AlertDialog(
-            title: Row(
-              children: [
-                NeonIcon(
-                  icon: Icons.check_circle,
-                  color: AppColorScheme.up,
-                  size: 20,
-                ),
-                SizedBox(width: AppSpacing.sm),
-                const Text('認證成功'),
-              ],
-            ),
-            content: const Text('您的實名認證已通過，現在可以進行提現操作'),
-            actions: [
-              TextButton(
-                child: const Text('確定'),
-                onPressed: () {
-                  Navigator.of(ctx).pop();
-                  Navigator.of(context).pop();
-                },
+          titleWidget: Row(
+            children: [
+              NeonIcon(
+                icon: Icons.check_circle,
+                color: AppColorScheme.up,
+                size: 20,
               ),
+              SizedBox(width: AppSpacing.sm),
+              const Text('認證成功'),
             ],
           ),
+          description: '您的實名認證已通過，現在可以進行提現操作',
+          actions: [
+            ModernDialogAction(
+              label: '確定',
+              isPrimary: true,
+              onPressed: () => Navigator.of(context).pop(),
+            ),
+          ],
         );
       } else {
-        showDialog(
+        ModernDialog.info(
           context: context,
-          builder: (ctx) => AlertDialog(
-            title: const Text('認證失敗'),
-            content: Text(response.message ?? '請稍後重試'),
-            actions: [
-              TextButton(
-                child: const Text('確定'),
-                onPressed: () => Navigator.of(ctx).pop(),
-              ),
-            ],
-          ),
+          title: '認證失敗',
+          description: response.message ?? '請稍後重試',
         );
       }
     } catch (e) {
       if (mounted) {
-        showDialog(
+        ModernDialog.info(
           context: context,
-          builder: (ctx) => AlertDialog(
-            title: const Text('認證失敗'),
-            content: Text(e.toString()),
-            actions: [
-              TextButton(
-                child: const Text('確定'),
-                onPressed: () => Navigator.of(ctx).pop(),
-              ),
-            ],
-          ),
+          title: '認證失敗',
+          description: e.toString(),
         );
       }
     } finally {