The dial already grouped its digits for the locale above 10, but below 10 it
went through toFixed, which hardcodes a dot. A German desktop therefore read
9.5 and 1.235 off the same dial, switching decimal convention halfway up the
scale.
Send both branches through the locale. A reading is a measurement rather than
interface text, so its separators follow the system's number conventions even
though the interface itself stays English.
English output is unchanged.
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
