pota/use/orientation

pota/use/orientation exposes the current screen orientation as 'horizontal' or 'vertical', derived from documentSize — so it tracks window resizes (including device rotation) without a separate listener. It has the same Emitter-pair shape as fullscreen and visibility.

Exports

• useOrientation() — signal accessor returning 'horizontal' | 'vertical'
• onOrientation(fn) — callback fired whenever the orientation flips