// ── HELPERS ──────────────────────────────────────────────────────────────────
function getNowPlaying(chId) {
  const now = new Date();
  const p = (programs[chId] || []).find(p => p.start <= now && p.stop > now);
  return p ? p.title : null;
}

// ── TOOLTIP ───────────────────────────────────────────────────────────────────
function showTooltip(e, p) {
  const ep = fmtEpisode(p.season, p.episode);
  const genres = formatCategories(p.categories);
  const title = p.title + (p.subtitle ? ` - ${p.subtitle}` : '') + (ep ? '  ' + ep : '');
  const meta = [p.airDate, p.rating, genres].filter(Boolean).join(' · ');
  document.getElementById('tt-title').textContent = title;
  document.getElementById('tt-time').textContent =
    `${fmtTime(p.start)} — ${fmtTime(p.stop)} · ${Math.round((p.stop-p.start)/60000)} min` +
    (meta ? ` · ${meta}` : '');
  document.getElementById('tt-desc').textContent = p.desc || '—';
  document.getElementById('tooltip').classList.add('visible');
  moveTooltip(e);
}
function moveTooltip(e) {
  const tt = document.getElementById('tooltip');
  const x=e.clientX+16, y=e.clientY+16;
  tt.style.left = (x+tt.offsetWidth >window.innerWidth  ? x-tt.offsetWidth -32 : x)+'px';
  tt.style.top  = (y+tt.offsetHeight>window.innerHeight ? y-tt.offsetHeight-32 : y)+'px';
}
function hideTooltip() { document.getElementById('tooltip').classList.remove('visible'); }