[Bug]: Missing remote share indicator on receiving shares

[blizzz]

⚠️ 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

When a user receives and accepts a federated share, the share indicator in the files table is missing – it is an empty icon, due to the fact that the avatar endpoint returned a 404 – there is no support for federated avatars in server so far:

Back at NC 27, the uid of the remote user was shown at least. Not great, but better than nothing.

Steps to reproduce

1. As User A on Nextcloud F share a file with User B on Nextcloud L
2. As User B, accept the share and refresh the files page
3. See the incoming file, and check the share indicator

Expected behavior

• the remote avartar, the remote user name, at least remote user id, or an icon that the files was received from a remote user

Installation method

None

Nextcloud Server version

28

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

No response

[skjnldsv]

I guess we can also use the Guest avatar endpoint to show some avatar too :)

[Fenn-CS]

👀 #47441