portal/app/app/Mail/ImportCompletedNotification.php

<?php

declare(strict_types=1);

namespace App\Mail;

use App\Models\ImportLog;
use Illuminate\Bus\Queueable;
use Illuminate\Mail\Mailable;
use Illuminate\Mail\Mailables\Content;
use Illuminate\Mail\Mailables\Envelope;
use Illuminate\Queue\SerializesModels;

/**
 * Уведомление о завершении CSV-импорта исторических лидов (ТЗ §6.6).
 */
class ImportCompletedNotification extends Mailable
{
    use Queueable;
    use SerializesModels;

    /**
     * @param  string  $outcome  'done' | 'failed'
     */
    public function __construct(
        public ImportLog $log,
        public string $outcome,
    ) {}

    public function envelope(): Envelope
    {
        $subject = $this->outcome === 'done'
            ? 'Импорт данных завершён — Лидерра'
            : 'Импорт данных не удался — Лидерра';

        return new Envelope(subject: $subject);
    }

    public function content(): Content
    {
        return new Content(
            markdown: 'mail.import-completed',
            with: [
                'log' => $this->log,
                'outcome' => $this->outcome,
            ],
        );
    }
}