Unlinked photo stays unrenamed

[harminius]

Description
The photo naming expression is ignored when the photo is unlinked from the unsaved feature

Environment
Production

Application (+ app version, build, operating system)
Teste on 2026.2.0, Android 16

Steps to reproduce

1. Create a field with custom photo naming in QGIS
2. Create a new feature in mobile
3. Take a photo in the form
4. Unlink the photo before saving the feature
5. Save the feature

Actual results
The photo ignores custom Photo naming settings and is created in the project folder with a default name.

Expected results
Either remove the photo entirely on Unlink
or do not even offer to unlink unsaved photo
or follow the custom naming.

Screenshots