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/RoomScreen/View/Timeline/EncryptedHistoryRoomTimelineView.swift

@@ -24,7 +24,7 @@ struct EncryptedHistoryRoomTimelineView: View {
     
     var body: some View {
         Label {
-            Text(L10n.screenRoomEncryptedHistoryBanner)
+            Text(title)
                 .font(.compound.bodyMDSemibold)
                 .foregroundColor(.compound.textInfoPrimary)
         } icon: {
@@ -43,6 +43,10 @@ struct EncryptedHistoryRoomTimelineView: View {
         .padding(.horizontal, 8)
         .padding(.vertical, 16)
     }
+    
+    private var title: String {
+        timelineItem.isSessionVerified ? L10n.screenRoomEncryptedHistoryBanner : L10n.screenRoomEncryptedHistoryBannerUnverified
+    }
 }
 
 private struct EncryptedHistoryLabelStyle: LabelStyle {
@@ -56,7 +60,9 @@ private struct EncryptedHistoryLabelStyle: LabelStyle {
 
 struct EncryptedHistoryRoomTimelineView_Previews: PreviewProvider, TestablePreview {
     static var previews: some View {
-        let item = EncryptedHistoryRoomTimelineItem(id: .random)
-        EncryptedHistoryRoomTimelineView(timelineItem: item)
+        VStack {
+            EncryptedHistoryRoomTimelineView(timelineItem: .init(id: .random, isSessionVerified: true))
+            EncryptedHistoryRoomTimelineView(timelineItem: .init(id: .random, isSessionVerified: false))
+        }
     }
 }