[Feature] New utility for unassigned faces

I have searched the existing feature requests to make sure this is not a duplicate request.

• Yes

The feature

Dear immich Team,

My feature request refers to the following closed issue:

It would be highly beneficial if there were a way to filter photos containing unassigned faces, allowing users to review and assign these faces one by one if desired.

One possible solution is to add a new filter option specifically for photos with unassigned faces. Alternatively, considering the recent introduction of the Utilities section, this functionality could be integrated there, alongside the duplicate detection feature.

Thank you for considering this suggestion.
(I hope I did not miss that you already work on it or that somebody already requested this :) )

Platform

• Server
• Web
• Mobile