Click an element in the device browser, by CSS selector or by a `ref` from a page-elements listing — works on BOTH iOS Safari and Android Chrome, auto-detected from the udid. Scrolls the element into view, waits for it to stop moving, and checks it is actually clickable — visible, non-zero-size, enabled, and not covered by anything — retrying until timeoutMs before it gives up. Then taps its center. On iOS the DEVICE taps its own screen at that position, so the page receives a real, fully trusted touch — pointerdown, touchstart, mousedown and click, exactly as from a finger — which also satisfies sites that gate on trusted input. On Android the tap is delivered as a TOUCH through the browser, so elements listening for pointer events respond as well as those listening for click. Falls back to mouse events, then a plain `.click()`, if a step is unsupported, and the response reports which was used via `via`. ERRORS rather than reporting success when the element never becomes clickable; pass force:true to skip the checks and dispatch at its coordinates anyway — which works for anything that still occupies a box, but NOT for a display:none or zero-size element, where there is no point to aim at and force fails too. When a selector matches several elements the first VISIBLE one wins, not the first in document order. This is COORDINATE-based. Android events are synthesized by the browser (isTrusted:false); iOS taps are real device input (isTrusted:true) whenever `via` comes back as "nativeTap".
