When a file with ROI definitions is opened (read into experiment.ROI()
by the HDF5 reader), the diffraction image now overlays the configured
box and circle ROIs as distinct colour-coded outlines, alongside the
existing resolution rings and spots. This is the first step of the
ROI-map-based multi-ROI canvas: showing the ROIs loaded from a file.
Azimuthal ROIs (wedge rendering) and per-ROI statistics from the bitmap
follow in subsequent steps.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>