TF-3410 Remove stroke for thread view or email view in desktop

lib/features/email/presentation/email_view.dart

@@ -80,9 +80,8 @@ class EmailView extends GetWidget<SingleEmailController> {
           child: Container(
             clipBehavior: Clip.antiAlias,
             decoration: controller.responsiveUtils.isWebDesktop(context)
-              ? BoxDecoration(
-                  borderRadius: BorderRadius.circular(20),
-                  border: Border.all(color: AppColor.colorBorderBodyThread, width: 1),
+              ? const BoxDecoration(
+                  borderRadius: BorderRadius.all(Radius.circular(20)),
                   color: Colors.white)
               : const BoxDecoration(color: Colors.white),
             margin: _getMarginEmailView(context),

lib/features/mailbox_dashboard/presentation/mailbox_dashboard_view_web.dart

@@ -222,9 +222,8 @@ class MailboxDashBoardView extends BaseMailboxDashBoardView {
   Widget _buildThreadViewForWebDesktop(BuildContext context) {
     return Container(
       margin: const EdgeInsetsDirectional.only(end: 16, bottom: 16),
-      decoration: BoxDecoration(
-        borderRadius: const BorderRadius.all(Radius.circular(20)),
-        border: Border.all(color: AppColor.colorBorderBodyThread, width: 1),
+      decoration: const BoxDecoration(
+        borderRadius: BorderRadius.all(Radius.circular(20)),
         color: Colors.white),
       child: ClipRRect(
         borderRadius: const BorderRadius.all(Radius.circular(20)),