responsive-gate-size-not-platform

Gate an adaptive layout on the window's own width-versus-height, never on the platform, and flip every geometry value the gate owns in the same breath — frame sizing, content scale and scrim height. Use when a layout is right on a phone and wrong in a narrow or resized desktop window, when forcing an adaptive flag to one value breaks a different platform's screen, or when artwork swallows the whole page on a wide…