The status-bar popover already handles quick theme switching, so a
separate theme-only modal was redundant. Repurpose it as a general
Settings surface whose first (currently only) section is Appearance:
base themes, sorted, with a High-contrast toggle for -hc siblings,
reusing the theme_families helpers shared with the popover.
Command id stays theme.pick (the welcome theme-link and tests
reference it); only the title and the view it opens change.
Co-Authored-By: Claude <noreply@anthropic.com>