Airframe theme-v16

The Terminal's title bar is a sentence-case label, as the KAN-75 demo clips already draw it (KAN-75). No token is
added, renamed or removed, and no token value changes.

Component CSS (airframe.css, airframe-components.css):

• .af-term__bar drops the uppercase tracked mono (10.5px, 0.08em) for the sans label style at 12.5px, sentence
  case, in terminal-dim. Its parts sit 6px apart, separated by a ·; a long title ends in an ellipsis.
• New .af-term__product: the product name in terminal-fg, the one bright word in the bar.
• .af-term__id keeps the tail number in mono, now in terminal-dim like the rest of the bar, and never shrinks.
• .af-term__live and the icon never shrink either. The Live dot is unchanged.

Components (not in theme/; they ship with the registry and the skill):

• Terminal: the README and preview show the bar as "hangar · Fix the flaky auth refresh test · HGR-7Q2K · Live",
  with the real ID on hover, and say not to set the bar in capitals.