Key backup Rust API adoption (#1952)

* 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>

ElementX/Sources/Screens/SecureBackup/SecureBackupScreen/SecureBackupScreenViewModel.swift

@@ -55,8 +55,8 @@ class SecureBackupScreenViewModel: SecureBackupScreenViewModelType, SecureBackup
             actionsSubject.send(.recoveryKey)
         case .keyBackup:
             switch secureBackupController.keyBackupState.value {
-            case .disabled:
-                enableKeyBackup()
+            case .disabled, .unknown:
+                enableBackup()
             case .enabled:
                 actionsSubject.send(.keyBackup)
             default:
@@ -67,11 +67,11 @@ class SecureBackupScreenViewModel: SecureBackupScreenViewModelType, SecureBackup
     
     // MARK: - Private
     
-    private func enableKeyBackup() {
+    private func enableBackup() {
         Task {
             let loadingIndicatorIdentifier = "SecureBackupScreenLoading"
             userIndicatorController?.submitIndicator(.init(id: loadingIndicatorIdentifier, type: .modal, title: L10n.commonLoading, persistent: true))
-            switch await secureBackupController.enableBackup() {
+            switch await secureBackupController.enable() {
             case .success:
                 break
             case .failure(let error):

ElementX/Sources/Screens/SecureBackup/SecureBackupScreen/View/SecureBackupScreen.swift

@@ -77,12 +77,10 @@ struct SecureBackupScreen: View {
             ListRow(label: .plain(title: L10n.screenChatBackupKeyBackupActionDisable, role: .destructive), kind: .navigationLink {
                 context.send(viewAction: .keyBackup)
             })
-        case .disabled, .enabling:
+        case .disabled, .enabling, .unknown:
             ListRow(label: .plain(title: L10n.screenChatBackupKeyBackupActionEnable), kind: .navigationLink {
                 context.send(viewAction: .keyBackup)
             })
-        default:
-            ListRow(label: .plain(title: L10n.commonLoading), details: .isWaiting(true), kind: .label)
         }
     }