Multi-selection doesn't work properly in collections

[kandykarter]

This issue respects the following points:

• This issue is not already reported on GitHub (I've searched it).
• I agree to follow Jellyfin's Code of Conduct.
• This report addresses only a single issue; If you encounter multiple issues, kindly create separate reports for each one.

Describe the bug

When editing a collection, "Select All" selects the poster image and none of the contents of the collection. Additionally, when selecting multiple items within a collection, the multi select "three dots" menu does not contain any useful items like "Remove from Collection". Makes it a chore to edit collections, especially when using them with list importers like jellyfin-auto-collections instead of the tmdb collections plugin.

Reproduction Steps

Go to any collection and select multiple items in it. "Remove from collections" will not appear in the context menu. Click "Select all" and it will select the poster image for the collection, instead of the contents.

Expected/Actual behaviour

Multi-selection should work like it does in other sections on jellyfin-web.

Logs

No response

Server version

10.10.7

Web version

10.10.7 (f4b8aa0)

Build version

10.10.7

Platform

Web, firefox on linux

Browser

Firefox, but also all other web wrapper clients

Additional information

No response