* 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
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