Center the name+bar block vertically within the Jauge's own box
(justify-content:center) so it no longer looks pinned to the top once a
name label adds extra content height.
Add appearance settings for the name: position (above the bar, or beside
it on the left), alignment when above (centered or left-aligned), font
family, font size, bold, and italic.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>