feat(awareness): render the Global Context compass from a store

The awareness layer presents the compass ring, heading, cardinal labels and
contact bearing markers through subscribeDirectionOverlay(); the application
shell publishes them to the gev-awareness-direction store and the scene
chrome renders them in the viewer's container.

src/layers/awareness/panel.js

@@ -86,7 +86,7 @@ export function createPanel({ state: layerState, parts }) {
           ? t('SELECT A FLIGHT, VESSEL, OR MAPPED INSTALLATION')
           : t('ENABLE TO LOAD OBSERVED / MAPPED PROXIMITY'),
       });
-    if (layerState.directionRoot) layerState.directionRoot.hidden = true;
+    parts.rendering.hideDirectionOverlay();
   }
 
   /** Clear the panel when the layer is destroyed. */