fix(ui): harden public page components

packages/ui/components/BackToTop.wrn

@@ -120,11 +120,11 @@ component BackToTop {
     }
 
     .wrn-back-to-top[data-position="right"] {
-      right: 1.5rem;
+      right: max(1.5rem, env(safe-area-inset-right));
     }
 
     .wrn-back-to-top[data-position="left"] {
-      left: 1.5rem;
+      left: max(1.5rem, env(safe-area-inset-left));
     }
 
     .wrn-back-to-top[data-position="center"] {