Sidebar preview is not rendering markdown

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Steps to reproduce

1. use markdown on last message
2. See unrendered markdown in sidebar preview

Expected behaviour

Either markdown characters should be ignored (good luck with that regex) and not displayed or markdown should be rendered in the room preview

Actual behaviour

Unrendered markdown is shown:

Talk app

Talk app version: c.nc
**Custom Signaling server configured:**c.nc

Custom TURN server configured: c.nc

Custom STUN server configured: c.nc

Browser

Microphone available: yes

Camera available: yes

Operating system: Ubuntu

Browser name: Firefox

Browser version: 125

Browser log

Server configuration

Operating system: c.nc

Web server: c.nc

Database: c.nc

PHP version: c.nc

Nextcloud Version: c.nc

List of activated apps:

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your server installation folder

Nextcloud configuration:

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your Nextcloud installation folder

Server log (data/nextcloud.log)

Insert your server log here

Start by reproducing the issue in a Talk room using markdown in the last message, then trace the sidebar preview rendering entry point in the JavaScript code. No file or test is named in the issue; done means the sidebar preview no longer shows raw markdown and a regression check covers the expected rendering or omission of markdown characters.