fix: Flash of external link decoration when creating doc from selected text

shared/utils/urls.ts

@@ -75,6 +75,11 @@ export function isUrl(text: string, options?: { requireHostname: boolean }) {
   }
 }
 
+/**
+ * Temporary prefix applied to links in document that are not yet persisted.
+ */
+export const creatingUrlPrefix = "creating#";
+
 /**
  * Returns true if the given string is a link to outside the application.
  *
@@ -82,7 +87,7 @@ export function isUrl(text: string, options?: { requireHostname: boolean }) {
  * @returns True if the url is external, false otherwise.
  */
 export function isExternalUrl(url: string) {
-  return !!url && !isInternalUrl(url);
+  return !!url && !isInternalUrl(url) && !url.startsWith(creatingUrlPrefix);
 }
 
 /**