Easier to dismiss popups: close button and swipe down

Sheets (including Now Playing) get a close button, an animated close and swipe-down on phones; lyrics and the visualizer close on swipe-down too.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

public/visualizer.js

@@ -169,7 +169,7 @@ function vizOpen() {
   const el = viz.el = document.createElement('div'); el.id = 'viz'; el.setAttribute('role', 'dialog'); el.setAttribute('aria-label', 'Visualizer');
   el.innerHTML = `<canvas id="vizc"></canvas><div class="viztop"><div class="grow"><b id="vizti"></b><small id="vizar"></small><small id="vizst"></small></div><button class="btn ghost" id="vizm"></button><button class="ibtn" id="vizx" aria-label="Close" title="Close (Esc)">${icon('x')}</button></div>
     <div class="vizfoot"><button class="ibtn" id="vizpv" aria-label="Previous">${icon('prev')}</button><button class="ibtn big" id="vizt" aria-label="Play or pause"></button><button class="ibtn" id="viznx" aria-label="Next">${icon('next')}</button></div>`;
-  document.body.appendChild(el); viz.cv = el.querySelector('#vizc'); vizSize(); vizText(); vizColors(t);
+  document.body.appendChild(el); swipeToDismiss(el, vizClose, { handle: '.viztop', always: true }); viz.cv = el.querySelector('#vizc'); vizSize(); vizText(); vizColors(t);
   const m = el.querySelector('#vizm'); m.textContent = VIZ_MODES.find(x => x[0] === viz.mode)[1];
   m.onclick = e => { e.stopPropagation(); const i = VIZ_MODES.findIndex(x => x[0] === viz.mode); viz.mode = VIZ_MODES[(i + 1) % VIZ_MODES.length][0]; vizSetPref(vizKind(cur()), viz.mode); m.textContent = VIZ_MODES.find(x => x[0] === viz.mode)[1]; viz.parts = []; viz.rings = []; };
   el.querySelector('#vizx').onclick = e => { e.stopPropagation(); vizClose(); }; el.querySelector('#vizt').onclick = e => { e.stopPropagation(); toggle(); }; el.querySelector('#vizpv').onclick = e => { e.stopPropagation(); prev(); }; el.querySelector('#viznx').onclick = e => { e.stopPropagation(); next(); };