math_cms/app/Filament/Resources/TextbookResource/Pages/EditTextbook.php

<?php

namespace App\Filament\Resources\TextbookResource\Pages;

use App\Filament\Resources\TextbookResource;
use Filament\Resources\Pages\EditRecord;

class EditTextbook extends EditRecord
{
    protected static string $resource = TextbookResource::class;

    protected string $view = 'filament.resources.textbook-resource.edit-record';
}