class TooltipManager { private activeCloser: (() => void) | null = null register(closeFn: () => void) { if (this.activeCloser) this.activeCloser() this.activeCloser = closeFn } clear(closeFn: () => void) { if (this.activeCloser === closeFn) this.activeCloser = null } } export const tooltipManager = new TooltipManager()