修复：大量的ScreenUtil误用，导致界面可能出现问题

(cherry picked from commit 2829da5267a14a9e0f43ff56060a68f1f8b2ca6a)

lib/app/widgets/dialogs/kr_dialog.dart

@@ -107,7 +107,7 @@ class KRDialog extends StatelessWidget {
           children: [
             if (icon != null) ...[
               icon!,
-              SizedBox(height: 20.w),
+              SizedBox(height: 20.h),
             ],
             if (title != null) ...[
               Text(
@@ -121,7 +121,7 @@ class KRDialog extends StatelessWidget {
                 ),
                 textAlign: TextAlign.center,
               ),
-              SizedBox(height: 12.w),
+              SizedBox(height: 12.h),
             ],
             if (message != null || customMessageWidget != null) ...[
               Container(
@@ -139,7 +139,7 @@ class KRDialog extends StatelessWidget {
                   ),
                 ),
               ),
-              SizedBox(height: 28.w),
+              SizedBox(height: 28.h),
             ],
             if (cancelText != null) ...[
               Row(