Viz zoom is independent + contain the iOS pinch-escape

Paul: (a) 'let me zoom in on the viz but don't let it affect the other modes' zoom' and (b) 'max zoom-out + keep going in iOS gets me to my browser tabs.' (a) The viz view gets its own VIZ={k,ox,oy} zoom state (CSS transform on #inside), completely separate from the map's ZOOM

▶ Play it: Mercury Interrogation — where the harmony organ has the least anywhere to hide https://stellate.app/?genre=bebop&seed=5407&path=694.13834,713.13867,675.13867&xdur=13.122

1688b6a https://github.com/aboard-io/stellate/commit/1688b6a7b54ffc3f014599d476ceb3dbd0f98ecc