() => {
window.__selectedMode = 'fast';
var MODE_GPU_DURATION = { fast: 20, high_detail: 60 };
window.__setMode = function(m) {
    window.__selectedMode = m;
    var fast = document.getElementById('mode-btn-fast');
    var hd   = document.getElementById('mode-btn-hd');
    if (fast) fast.classList.toggle('mode-btn-active', m === 'fast');
    if (hd)   hd.classList.toggle('mode-btn-active',   m === 'high_detail');
    var dur = MODE_GPU_DURATION[m];
    if (dur !== undefined) {
        var sl = document.getElementById('custom-gpu-duration');
        var vl = document.getElementById('custom-gpu-duration-val');
        if (sl) { sl.value = dur; sl.dispatchEvent(new Event('input', {bubbles: true})); }
        if (vl) vl.textContent = dur;
    }
};
}