fix: add platform abstraction for deeplink

This was crashing App.tsx due to the deep link listener calling methods on window which do not exist.

js/desktop/src/App.tsx

@@ -56,10 +56,10 @@ function DeepLinkNavigationListener() {
   const navigate = useNavigate();
 
   useEffect(() => {
-    window.electronDeepLink.getPending().then((path) => {
+    platform.deepLink.getPending().then((path) => {
       if (path) navigate(path);
     });
-    return window.electronDeepLink.onNavigate((path) => navigate(path));
+    return platform.deepLink.onNavigate((path) => navigate(path));
   }, [navigate]);
 
   return null;