[Bug]: Desktop Clients don't show existing share links

### ⚠️ 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](https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule) and [Desktop Releases](https://nextcloud.com/install/#install-clients) for supported versions.
- [x] I agree to follow Nextcloud's [Code of Conduct](https://nextcloud.com/contribute/code-of-conduct/)

### Bug description

All users have been shared a folder to collaborate.

Using the desktop app on Windows or macOS, I create an external link to share a file that lies within said folder.
After closing the share dialogue, I go back to it. The "copy link" icon is gone and the existing link is not shown.
The link works though.

I go to the web interface where I can see the link.
I open the Android app where I can see it, too.

To clearify: This happens ONLY in folders that I am not the owner of (that are shared with me). For all shares created in ones own folders, it work.

Has been an issue at least since April 2025.

### Steps to reproduce

### Expected behavior

When a file/folder has been shared via link, this should be visible in the desktop client software

### Which files are affected by this bug

any file or folder within a shared folder

### Operating system

Windows

### Which version of the operating system you are running.

Windows 11

### Package

Official Linux AppImage

### Nextcloud Server version

31.0.8

### Nextcloud Desktop Client version

3.17.1

### 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 Enabled

### Are you using an external user-backend?

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

### Nextcloud Server logs

```shell

```

### Additional info

_No response_