Rebase onto main: the interface language is saved with main's other
preferences (cadcraft.prefs, beside the theme) instead of its own storage
key, on desktop and web; strings main added or changed in the touched
places (Dynamic Input settings, Properties header and current-property
rows, block picker, theme and command-history menu items, open/save
filters) are wrapped and translated; main's native-menu poll order is kept.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
