messages implemented

resources/views/web/categories.blade.php

@@ -1,6 +1,16 @@
 @extends('layouts.nova')
 
 @section('content')
+@php
+    $contentTypes = $contentTypes ?? collect([
+        (object) [
+            'name' => 'Categories',
+            'description' => null,
+            'roots' => $categories ?? collect(),
+        ],
+    ]);
+    $subgroups = $subgroups ?? collect();
+@endphp
 <div class="container-fluid legacy-page">
     <div class="effect2 page-header-wrap">
         <header class="page-heading">