Add presentation layer for GetEmailContent

lib/features/mailbox/presentation/mailbox_controller.dart

@@ -98,8 +98,8 @@ class MailboxController extends BaseController {
     } catch (e) {}
   }
 
-  SelectMode getSelectMode(PresentationMailbox presentationMailbox, PresentationMailbox selectedMailbox) {
-    return presentationMailbox.id == selectedMailbox.id
+  SelectMode getSelectMode(PresentationMailbox presentationMailbox, PresentationMailbox? selectedMailbox) {
+    return presentationMailbox.id == selectedMailbox?.id
       ? SelectMode.ACTIVE
       : SelectMode.INACTIVE;
   }

lib/features/mailbox/presentation/mailbox_view.dart

@@ -86,7 +86,7 @@ class MailboxView extends GetWidget<MailboxController> {
 
   Widget _buildCloseScreenButton(BuildContext context) {
     return Padding(
-      padding: EdgeInsets.only(left: 24, top: responsiveUtils.isMobile(context) ? 0 : 12),
+      padding: EdgeInsets.only(left: 16, top: responsiveUtils.isMobile(context) ? 0 : 12),
       child: IconButton(
         key: Key('mailbox_close_button'),
         onPressed: () => controller.closeMailboxScreen(),

lib/features/mailbox/presentation/widgets/storage_widget_builder.dart

@@ -17,7 +17,7 @@ class StorageWidgetBuilder {
       padding: EdgeInsets.only(left: 40, top: 16, bottom: 20, right: 40),
       color: AppColor.storageBackgroundColor,
       alignment: Alignment.bottomLeft,
-      height: 112,
+      height: 100,
       child: Column(
         mainAxisAlignment: MainAxisAlignment.start,
         crossAxisAlignment: CrossAxisAlignment.start,

lib/features/mailbox/presentation/widgets/user_information_widget_builder.dart

@@ -33,7 +33,10 @@ class UserInformationWidgetBuilder {
             _onOpenUserInformationActionClick!();
           }
         },
-        leading: SvgPicture.asset(_imagePaths.icTMailLogo, width: 40, height: 40, fit: BoxFit.fill),
+        leading: AvatarBuilder()
+          .text('J')
+          .size(40)
+          .build(),
         title: Transform(
           transform: Matrix4.translationValues(0.0, 0.0, 0.0),
           child: Text(