Configurable metadata lines under Browser thumbnails (Keywords, EXIF)

Problem: In the Browser grid view, thumbnails only show filename, star rating, and color tag. There's no way to display Keywords or other metadata under each thumbnail without selecting the image individually.

Request: Add 1-3 configurable metadata lines under Browser thumbnails (similar to Preferences → Thumbnails → Details, but for the Browser grid). Users should be able to select which fields to display from a dropdown: Keywords, Dimensions, Lens, ISO/Shutter/Aperture, Date/Time.

Use case: In studio photography workflows, we apply keywords to images at capture time to identify shot positions (front, side, back, detail). Being able to see these keywords at a glance in the grid would eliminate the need to click each image to verify tagging — saving significant time when reviewing hundreds of images per session.

Precedent: Adobe Frame, Photo Mechanic (3 configurable lines), and Adobe Bridge all offer this. It's a competitive gap for Capture One in high-volume studio environments.

Minimum viable: Even a single non-configurable line showing Keywords would solve 90% of the need.