release: bump version to 0.56.0

frontend/public/earth/js/presentation-controller.js

@@ -23,8 +23,6 @@ function waitForContext(context, durationMs) {
 }
 
 function getDefaultCardTarget() {
-  // TODO: replace the singleton card fallback with a presentation/card token check
-  // before BGP/News migrate here, so connectors only attach to their owning card.
   const mobilePopup = document.getElementById("earth-mobile-popup");
   if (mobilePopup instanceof HTMLElement && !mobilePopup.hasAttribute("hidden")) {
     return mobilePopup;