Mole/app/MoleApp.swift

import SwiftUI

class AppDelegate: NSObject, NSApplicationDelegate {
  func applicationDidFinishLaunching(_ notification: Notification) {
    NSApp.setActivationPolicy(.regular)
    NSApp.activate(ignoringOtherApps: true)
    NSApp.windows.first?.makeKeyAndOrderFront(nil)
  }
}

@main
struct MoleApp: App {
  @NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate

  var body: some Scene {
    WindowGroup("Mole") {
      ContentView()
    }
    .windowStyle(.hiddenTitleBar)
    .windowResizability(.contentSize)
  }
}