[Bug]: GUI is unhelpful in case of file name too long

[ysalmon]

⚠️ Before submitting, please verify the following: ⚠️

• [X] This is a bug, not a question or a configuration issue.
• [X] This issue is not already reported on Github (I've searched it).
• [X] Nextcloud Server and Desktop Client are up to date. See Server Maintenance and Release Schedule and Desktop Releases for supported versions.
• [X] I agree to follow Nextcloud's Code of Conduct

Bug description

Sometimes, file names on the server are too long to sync to an ext4 filesystem. The client reports it, but in a fashion that is unhelpful :

• the main dialog will show the beginning of the offending file name,
• the parameters dialog show an error message on a red background, with the end of the offending file name,
• neither give a way to copy the file name.

Also, the .nextcloudsync.log does not contain a message pertaining to this.

Steps to reproduce

1. Have a very long file name on the server and a client syncing to an ext4 filesystem.
2. Observe.

Expected behavior

There should be a way to copy the offending file name (trough a contextual menu, a button, or a link).

Which files are affected by this bug

the point of this bug report is that it is cumbersome to get that information

Operating system

Linux

Which version of the operating system you are running.

KUbuntu 22.04

Package

Other

Nextcloud Server version

n/a

Nextcloud Desktop Client version

3.13.0

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

Updated from a minor version (ex. 3.4.2 to 3.4.4)

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

Are you using an external user-backend?

• [ ] Default internal user-backend
• [ ] LDAP/ Active Directory
• [ ] SSO - SAML
• [ ] Other

Nextcloud Server logs

No response

Additional info

No response