0928988abc
The generic .hidden { display:none } is defined earlier in the stylesheet than
.dev-panel { display:flex }; equal specificity meant source order won and the
panel stayed visible with the toggle off. A two-class .dev-panel.hidden rule
wins, so all dev controls/data truly hide when Dev Mode is disabled.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>