ViewState.swift

final class ViewPresenter {
    init(dataObserver: DataObserver) {
        // Call to main actor-isolated initializer 'init(dataObserver:)' in a synchronous nonisolated context
        self.viewState = ViewState(dataObserver: dataObserver)
    }

    let viewState: ViewState
}

@MainActor final class ViewState: ObservableObject {
    let dataObserver: DataObserver

    init(dataObserver: DataObserver) {
        self.dataObserver = dataObserver
    }

    @Published private(set) var status: Status = .loading
    @Published private(set) var contacts: [Contact] = []
}