[Bug]: Mentioning users in comment doesn't render user names

[st3iny]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

No user names are rendered when mentioning users in the comment rich text editor in files.

Steps to reproduce

1. Open the sidebar of a file.
2. Start typing a comment and mention someone by typing @user....
3. Some results are shown but only the avatar is rendered.

Expected behavior

The avatar and user name should be rendered for each autocomplete result.

It turns out that the OCS endpoint returns an object like: { "label": "user..." }
But NcAutoCompleteResult expects: { "title": "user..." }

Installation method

None

Nextcloud Server version

master

Operating system

None

PHP engine version

None

Web server

None

Database engine version

None

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

Can be reproduced on c.nc.c.

[st3iny]

Rendering of inserted mentions is also broken in a similar way:

[st3iny]

Fixed by nextcloud-libraries/nextcloud-vue#5215