Refactor the `FocalPointEditor` component in `admin-gallery.tsx` to accurately map click coordinates on aspect ratio previews to the original image's focal point. This involves recalculating the mapping logic to account for image scaling and cropping (`object-fit: cover`). Additionally, new focal point data has been added to `server/gallery-focal-points.json`, and some image mappings in `server/cloudinary-gallery-map.json` have been adjusted.
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