import AppKitimport SwiftUI @MainActorenum MenuPasteboardCopy {    typealias DeferredAction = @MainActor @Sendable () -> Void    typealias Scheduler = @MainActor @Sendable (@escaping DeferredAction) -> Void    typealias Writer = @MainActor @Sendable (String) -> Void     static func perform(        _ text: String,        scheduler: Scheduler = Self.schedule,        writer: @escaping Writer = Self.write,        completion: @escaping DeferredAction = {})    {        scheduler {            writer(text)            completion()        }    }     private static func schedule(_ action: @escaping DeferredAction) {        DispatchQueue.main.async(execute: action)    }     private static func write(_ text: String) {        let pasteboard = NSPasteboard.general        pasteboard.clearContents()        pasteboard.setString(text, forType: .string)    }} struct ClickToCopyOverlay: NSViewRepresentable {    let copyText: String     func makeNSView(context: Context) -> ClickToCopyView {        ClickToCopyView(copyText: self.copyText)    }     func updateNSView(_ nsView: ClickToCopyView, context: Context) {        // Guard against no-op writes to avoid AppKit view invalidation on every        // parent card SwiftUI diff (each MenuCardView body re-eval runs through        // .overlay { ClickToCopyOverlay(...) }, which calls updateNSView even        // when copyText is unchanged).        guard nsView.copyText != self.copyText else { return }        nsView.copyText = self.copyText    }} final class ClickToCopyView: NSView {    var copyText: String    private let copyAction: (String) -> Void     init(        copyText: String,        copyAction: @escaping (String) -> Void = { MenuPasteboardCopy.perform($0) })    {        self.copyText = copyText        self.copyAction = copyAction        super.init(frame: .zero)        self.wantsLayer = false    }     @available(*, unavailable)    required init?(coder: NSCoder) {        fatalError("init(coder:) has not been implemented")    }     override func acceptsFirstMouse(for event: NSEvent?) -> Bool {        true    }     override func mouseDown(with event: NSEvent) {        _ = event        self.copyAction(self.copyText)    }}