CURTAIN PLATES, NIGHT  ->  src/assets/curtains/<room>-night.webp (same size and framing as the day plate)
Use the DAY sheet as the input picture so the frames stay registered with the 3D curtains.

Turn this sheet into the same four drawings at night. Keep every panel, frame, mullion, wall, tree, roof and the whole
composition exactly in place, and keep the same clean white gutters between the panels. Outside the windows: a deep
indigo-blue night sky laid in with dense marker sweeps and a few tiny white gel-pen stars, the garden, trees and
buildings in dark blue-grey and deep teal marker tones, a few warm garden lamps and lit neighbouring windows glowing
amber. Inside the room: dim, warm lamplight on the walls, sills and floor near the window. Same alcohol-marker and
black fineliner style on white marker paper. No text, no lettering, no people, no animals.

Split the night sheet with the SAME names and sizes as the day sheet. No generator at hand:
python3 tools/pictools.py night src/assets/curtains/dining-day.webp src/assets/curtains/dining-night.webp
