update patch 1

app/Models/Menu.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Menu extends Model
+{
+    use HasFactory;
+
+    protected $fillable = ['title', 'url', 'icon', 'parent_id', 'order'];
+
+    public function parent()
+    {
+        return $this->belongsTo(Menu::class, 'parent_id');
+    }
+
+    public function children()
+    {
+        return $this->hasMany(Menu::class, 'parent_id')->orderBy('order');
+    }
+}