Wrap urls for inline iframes

lib/Properties.hs

@@ -229,6 +229,9 @@ checkObjectProperty :: Object -> Property -> LintWriter Layer
 checkObjectProperty obj p@(Property name _) = case name of
   "url" -> do
     pure ()
+    unwrapURI (Proxy @"website") p
+      (dependsOn . Link)
+      (dependsOn . Local)
     unless (objectType obj == "website")
       $ complain "\"url\" can only be set for objects of type \"website\""
   "allowApi" -> forbidProperty name