ios: fix backgrounding error

ios/QueueCube/Views/ContentView.swift

@@ -121,9 +121,15 @@ extension ContentView
                         await clearConnectionErrorIfNecessary()
                         await handle(event: event)
                     case .error(let error):
+                        // Ignore if we're in the bg
+                        guard scenePhase == .active else { break }
+                    
                         // Check if this is a backgrounding error (connection abort)
-                        let nsError = error as NSError
-                        let isBackgroundingError = nsError.code == 53
+                        var isBackgroundingError = false
+                        if case let .websocketError(wsError) = error {
+                            let nsError = wsError as NSError
+                            isBackgroundingError = nsError.code == 53
+                        }
 
                         // Only show connection error to user if it's not a backgrounding error
                         if !isBackgroundingError {