const tabs=[...document.querySelectorAll('.task-tabs [role=tab]')];
function select(tab){
 for(const b of tabs){const on=b===tab;b.setAttribute('aria-selected',String(on));b.tabIndex=on?0:-1;document.getElementById(b.getAttribute('aria-controls')).hidden=!on;}
 document.dispatchEvent(new CustomEvent('taskchange'));
}
tabs.forEach((b,i)=>{b.addEventListener('click',()=>select(b));b.addEventListener('keydown',e=>{if(!['ArrowLeft','ArrowRight','Home','End'].includes(e.key))return;e.preventDefault();const j=e.key==='Home'?0:e.key==='End'?tabs.length-1:(i+(e.key==='ArrowRight'?1:-1)+tabs.length)%tabs.length;select(tabs[j]);tabs[j].focus();});});