MenuKit

MenuKit 2.0.0

A re-architecture - simpler and more unified, not bigger.

Three unifications:

• ONE WINDOW. Creating a slot and interacting with it are now separate. One window interacts with anything addressable - a vanilla slot, a created slot, an element, a panel - the same way.
• One region placement + reactive sizing. Three placement systems collapsed into one; every panel now auto-fits the screen (wraps its width, scrolls its height) at any GUI scale. The old relative-verb placement and lambda anchors are gone.
• Inertness and opacity, system-complete: hidden is inert, a visible opaque panel blocks click-through, whatever it covers is inert - one law.

Plus an adaptive-layout foundation, widget-gallery fixes, HUD text folded into the core (wrapping) label, and an everywhere-default for injected panels.

Breaking: this is a clean API break - the old slot/placement API does not compile against 2.0.