Function usePanelReturnTarget

desktop/src/shared/hooks/usePanelReturnTarget.ts:18–40

(resetKey: unknown = null)

 * breadcrumbs from leaking across contexts.
 */
export function usePanelReturnTarget<T>(resetKey: unknown = null): {
  hasTarget: boolean;
  store: PanelReturnTargetStore<T>;
} {
  const storeRef = React.useRef<PanelReturnTargetStore<T> | null>(null);
  storeRef.current ??= createPanelReturnTargetStore<T>();
  const store = storeRef.current;

  const previousResetKeyRef = React.useRef(resetKey);
  if (previousResetKeyRef.current !== resetKey) {
    previousResetKeyRef.current = resetKey;
    // Render-safe silent drop: useSyncExternalStore re-reads the snapshot
    // during this same render, so no notification is needed (or allowed).
    store.reset();
  }

  const hasTarget = React.useSyncExternalStore(
    store.subscribe,
    () => store.peek() != null,
  );

  return { hasTarget, store };
}