Product CSV Image Cleanup

I have a product catalogue in CSV format that needs a quick tidy-up before import. The only fields giving trouble are the image columns and a few option columns linked to them. Every product should reference its images by file name only—no full URLs, no mixed formats—so I need each image link stripped back to something like “product123.jpg”. While you are in there, please make sure the option columns that point to those images stay aligned and free of stray characters or empty rows.

Deliverable: a single, ready-to-import CSV with consistent image file names and clean, intact product-option data. I will provide the original CSV as soon as we start; just send the corrected version back in the same structure.