ios: disable self-destruct on LA mode change to "system", create new profile with past timestamp (#2416)

apps/ios/Shared/Views/LocalAuth/LocalAuthView.swift

@@ -58,7 +58,7 @@ struct LocalAuthView: View {
                 if let displayName = displayName, displayName != "" {
                     profile = Profile(displayName: displayName, fullName: "")
                 }
-                m.currentUser = try apiCreateActiveUser(profile)
+                m.currentUser = try apiCreateActiveUser(profile, pastTimestamp: true)
                 onboardingStageDefault.set(.onboardingComplete)
                 m.onboardingStage = .onboardingComplete
                 try startChat()

apps/ios/Shared/Views/UserSettings/PrivacySettings.swift

@@ -338,6 +338,7 @@ struct SimplexLockView: View {
                         switch laResult {
                         case .success:
                             _ = kcAppPassword.remove()
+                            resetSelfDestruct()
                             laAlert = .laTurnedOnAlert
                         case .failed, .unavailable:
                             currentLAMode = .passcode