/**
 * Enable / disable hit-testing on an interactive object (Phaser v4).
 *
 * v4 (4.2.1 Giedi) quirk — the trap behind the dead sub-bar buttons:
 * the Phaser 3 idiom `obj.ignorePointer = true` is a NO-OP in the INPUT
 * system (that property belongs to the physics world — matter.js — only).
 * v4's InputManager gates hit-testing on `obj.input.enabled` (see
 * InputManager.inputCandidate: `if (!i || !i.enabled || ...) return false`),
 * and a pointer press lands on only the single TOPMOST hit (topOnly) —
 * so an invisible rect that was "supposed to be off" keeps swallowing
 * every click beneath it, forever.
 *
 * Use this wherever the old code wrote `ignorePointer`:
 *
 *   setInteractiveEnabled(obj, false)  // the object stops catching clicks
 *   setInteractiveEnabled(obj, true)   // it catches them again
 *
 * No-op if the object never got setInteractive() — safe either way.
 */
export function setInteractiveEnabled(obj, enabled) {
  if (obj && obj.input) obj.input.enabled = !!enabled;
  return obj;
}