The status-bar pill only filled a progress bar during the Measuring state,
even though the receiver already reports a real progress value during
pedestal/mask calibration. Render the same bar for the Pedestal state
(filled coral to match its pill colour), and relabel the state and its
button as "Calibration"/"CALIBRATE". The internal state value stays
"Pedestal" and the /pedestal endpoint is unchanged for back-compatibility.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>