Note hit-test rectangles not sized to current image zoom

The Note "visual rectangles" are drawn on the image before the image is resized.

But the Note "mouse hit test" rectangles are currently sized assuming the image is at 100% size. The "hit test" rectangles need to be sized correctly for current image zoom.

Inspect the code that draws Note visual rectangles and performs mouse hit testing, then reproduce the behavior at a non-100% image zoom. Compare both rectangle calculations and verify that clicking notes selects the correct region at multiple zoom levels.

Written by the indexing model from the issue text.