fix(probe): scroll instantly so the drag checks stop missing the widgetHEADmain

The gallery sets `html{scroll-behavior:smooth}`, so `scrollIntoView` animates. The fader check slept a fixed 200ms and then read `getBoundingClientRect`, which sometimes caught the rect mid-scroll. The drag went out at stale coordinates. The press landed off the fader, and the check reported a dead widget about one run in six.

The probe has no reason to animate, so it now scrolls with `behavior:'instant'`. That removes the race rather than waiting it out. A `settledGeom` read still guards against zoom and column relayout. It requires the geometry to be stable twice over and on screen, because two matching samples taken before a relayout begins look identical to a settled one.

Both checks now assert the press landed on the widget before dispatching. That assertion earned itself during the fix. My first attempt polled for a stable rect and returned pre-scroll coordinates every time, and the press-landed check caught it by printing a point below the window.

The toggle check has the same fixed-sleep shape and failed that way while I was diagnosing, so it got the same fix.

Verified over 8 consecutive runs against the measured 1-in-6 rate. All three checks pass with the press point identical each time, so the result is deterministic rather than lucky.

0 files changed, 0 insertions, 0 deletions