Not possible to add photos in Signal when iOS "limited access" is enabled

[itsamemarkus]

Bug description

When having limited access for Signal enabled, you can not select new photos that Signal should have access to within the Signal app. You have to enter privacy settings each time.

Technical details about Limited Access:

https://developer.apple.com/documentation/photokit/delivering_an_enhanced_privacy_experience_in_your_photos_app

Steps to reproduce

• only allow limited access for photos when Signal asks for it initially (or enable limited access via privacy settings later)
• Create new message
• Photos button

Actual result: no photos (or only the manually selected ones via settings) are displayed and there is no option to add photos.

Expected result: Signal shows system prompt with photos to select that Signal should have access to. This is example on how this looks with Strava

I think it would be nice if this would work more easily with a privacy centric app.

Device info

Device: iPhone 15 Pro

iOS version: 17.5.1

Signal version: 7.17 (171)