* Adopt Rust side secure backup APIs (incomplete, based on poljar/backup-pr)
* Implement the home screen recovery key confirmation banner.
* Update with the latest Rust changes.
The loading button for .unknown was incorrect. It should be treated as disabled.
---------
Co-authored-by: Doug <douglase@element.io>
* Converge on UserSessionFlowCoordinator logout confirmation
* Add logout confirmation screen strings to untranslated.
* Fix chat backup learn more URl fragment.
* Implement logout flows that check recovery and key backup for the last session
* Move logout confirmation screen strings to localazy
* Change encrypted timeline item copy to "Waiting for decryption key"
* Use different encrypted history banner based on key backup states
* Introduce a SettingsFlowCoordinator and implement navigation directly to the secure backup screen from the logout flows.
* Fix **mocked** secure backup controller flows
* Simplify encrypted history banner logic
* Address PR comments
