[Bug]: Missing hint of default expiration date on link shares

[ElSi-DVT]

⚠️ 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 in the settings a value for "Set default expiry date" is set and "Enforce expiry date" unchecked, there is no hint at creating a link share that an expiration date will be set.
The user thinks that the link share will be valid forever but when clicking on "Customize link" he sees that a expiration date was set automatically.

Steps to reproduce

1. Configure the Sharing settings like this
   • Allow users to share via link and emails
   • Allow public uploads
   • Always ask for a password
   • Enforce password protection
   • Set default expiry date -> Expire after 30 day(s)
   • Enforce expiry date
2. Create a link share.
3. Click on "Customize link" and see that there was set an expiration date.

Expected behavior

It should be like when the option "Enforce expiry date" is enabled, that the user sees in the pop-up when creating the link share that an expiration date is set.
He should be able to change the date or completely uncheck the option.

Or at least a notice should be displayed that an expiry date is set and that it can then be adjusted afterwards.

Nextcloud Server version

27.1.7 28.0.3

[ElSi-DVT]

Still no hint in 27.1.9

[ElSi-DVT]

Still no hint in 28.0.7

[joshtrichards]

Duplicate of #48860 (WIP)