ai-web/app/Support/MarkdownRenderer.php

<?php

declare(strict_types=1);

namespace App\Support;

use Illuminate\Support\Str;

class MarkdownRenderer
{
    public function render(?string $content): string
    {
        $markdown = trim((string) $content);

        if ($markdown === '') {
            return '';
        }

        $markdown = $this->normalizeStorageLinks($markdown);

        return (string) Str::markdown($markdown, [
            'html_input' => 'strip',
            'allow_unsafe_links' => false,
        ]);
    }

    private function normalizeStorageLinks(string $markdown): string
    {
        $pattern = '/https?:\/\/(?:localhost|127\.0\.0\.1)(?::\d+)?\/storage\/([^\s)"\'\<\>]+)/i';
        $normalized = preg_replace($pattern, '/storage/$1', $markdown);

        return is_string($normalized) ? $normalized : $markdown;
    }
}