newlines in `Edit` mode aren't preserved in `Preview` mode

Please make a clear and concise description of what the bug is.

Steps to reproduce

1. create a note that contains checklists
2. toggle between Preview and Edit mode

Expected behaviour

I expect the newlines that I put in the note in Edit mode to be preserved in Preview mode.

Actual behaviour/Screenshots

this

turns into

Server

Please complete the following information.

• Notes app version: 4.8.1
• Nextcloud version: nextcloud:27.0.1-apache
• Database: PostgreSQL

Nextcloud configuration:

{
    "system": {
        "htaccess.RewriteBase": "\/",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "***REMOVED SENSITIVE VALUE***"
        ],
        "filelocking.enabled": true,
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 6379,
            "timeout": 0
        },
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "27.0.1.2",
        "overwrite.cli.url": "***REMOVED SENSITIVE VALUE***",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "overwriteprotocol": "https",
        "updater.secret": "***REMOVED SENSITIVE VALUE***",
        "loglevel": 2,
        "maintenance": false
    }
}

Client

Please complete the following information.

• Browser (incl. version): firefox 115.3.1esr
• OS: Debian

Start by reproducing the issue with a note containing checklists, following the reported steps to toggle between Edit and Preview modes. Compare the entered text with the preview output and trace the frontend path responsible for converting the note to Preview mode. Done means newlines entered in Edit mode remain preserved in Preview mode.