P: Lightroom mobile culling: no undo for accidental 0-star reset, and grid loses your place after full screen

Two related pain points when culling large albums on Lightroom mobile:

1) Accidental 0-star reset with no undo. While culling upward (e.g. bumping images from 2 to 3 stars), an unintended touch is occasionally registered as a tap that resets the image to 0 stars. Because 0 stars effectively hides the image back among thousands of unrated photos, it's easy to lose a shot and hard to recover it. On desktop I can simply undo, but mobile has no equivalent undo or course-correction for a rating reset. Suggested fix: add an undo gesture (or a brief "Undo" toast) after a rating change, and/or a confirmation step when a rating is reset to 0.

2) Returning to grid loses your place. When I open an image full screen (loupe) from grid and then go back to grid, it doesn't return me to the image I was just viewing — I land somewhere else and have to scroll to find my spot again. In a large catalog that can mean scrolling through thousands of photos to get back to where I was, which badly breaks the culling flow. Suggested fix: when returning from full-screen/loupe to grid, keep the last-viewed image selected and scrolled into view so I resume exactly where I left off.

Device/context: Lightroom mobile on iPhone, during high-volume culling sessions.