* Fix changelog page crash when GitHub release notes are unavailable
* Refactor changelog view to handle missing avatars gracefully and improve session sign-out logic in tests
* Enhance changelog view to display fallback messages for unavailable release notes and publication dates
* Update onboarding system tests to reflect UI changes and improve assertions
- Changed button labels from "Get started" to "Continue" and "Complete" to align with updated UI.
- Updated text assertions for clarity, changing "Set your preferences" to "Configure your preferences".
- Adjusted locale selection options to include language codes.
- Enhanced validation error handling in preferences form.
- Improved navigation assertions to ensure accurate path checks.
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