frontend/src/lib/notify.ts

// System notifications for when the tab is buried — the bridge to real
// desktop usage until the Tauri overlay exists. Click = engagement,
// which the caller records as a clicked_through outcome.

export function notifyPermission(): NotificationPermission | "unsupported" {
  return "Notification" in window ? Notification.permission : "unsupported";
}

/** Must be called from a user gesture (settings toggle). */
export async function requestNotifyPermission(): Promise<boolean> {
  if (!("Notification" in window)) return false;
  return (await Notification.requestPermission()) === "granted";
}

export function osNotify(body: string, onClick: () => void): void {
  if (!("Notification" in window) || Notification.permission !== "granted") return;
  const n = new Notification("Puck", { body, silent: true });
  n.onclick = () => {
    window.focus();
    onClick();
    n.close();
  };
}