Shared By filter opens an empty dropdown without incoming shares #3861

Initial Checklist

• I understand this is a bug report and questions should be posted in the Community Discussions
• I searched issues and couldn’t find anything (or linked relevant results below)

Bug Description

The Shared By filter opens an empty dropdown when no files or folders have been shared with the user.

Regression introduced by #3554: the shared ItemFilter component now hides the option search whenever its items list is empty. Only the tag filters received a replacement message; Shared By was left blank. Previously, its search input remained visible.

Reproduction Steps

1. Sign in as a user with no incoming shares.
2. Open Shared with me.
3. Click Shared By.

Expected Outcome

Filters with no options show their configured empty-state message or keep the search input visible as before. Shared By stays available and explains that people who share files and folders with you will appear here.

Actual Outcome

The dropdown is empty, with no explanation.