Revert "fix: remove port check"

This reverts commit d7a2022.

extension/js/common/core/common.ts

@@ -160,6 +160,7 @@ export class Str {
     if (email.includes(' ')) {
       return false;
     }
+    email = email.replace(new RegExp(`:${MOCK_PORT}$`), ''); // for MOCK tests, todo: remove from production
     // `localhost` is a valid top-level domain for an email address, otherwise we require a second-level domain to be present
     return /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|localhost|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/i.test(
       email