Shows an orange "DEV" capsule next to the iCloud row in Settings and a
development environment notice at the top of iCloud settings, helping
distinguish CloudKit dev environment from production during development.
- Skip onboarding in tests by setting UserDefaults before launch
- Update all addSource.* identifiers to addRemoteServer.* for new flow
- Switch from identifier-based to text-based element lookups (iOS 26 AXe limitation)
- Add Yattee Server credential support in instance setup
- Update baseline screenshots for Home tab and settings
