Key backup returns (#1951)

* 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

ElementX/Sources/Screens/Settings/SettingsScreen/View/SettingsScreen.swift

@@ -19,8 +19,6 @@ import SFSafeSymbols
 import SwiftUI
 
 struct SettingsScreen: View {
-    @State private var showingLogoutConfirmation = false
-    
     @ObservedObject var context: SettingsScreenViewModel.Context
     
     var body: some View {
@@ -196,16 +194,9 @@ struct SettingsScreen: View {
             ListRow(label: .default(title: L10n.screenSignoutPreferenceItem,
                                     systemIcon: .rectanglePortraitAndArrowRight),
                     kind: .button {
-                        showingLogoutConfirmation = true
+                        context.send(viewAction: .logout)
                     })
                     .accessibilityIdentifier(A11yIdentifiers.settingsScreen.logout)
-                    .alert(L10n.screenSignoutConfirmationDialogTitle, isPresented: $showingLogoutConfirmation) {
-                        Button(L10n.screenSignoutConfirmationDialogSubmit, role: .destructive) {
-                            context.send(viewAction: .logout)
-                        }
-                    } message: {
-                        Text(L10n.screenSignoutConfirmationDialogContent)
-                    }
         } footer: {
             VStack {
                 versionText