FEATURE: Improve UX support for multiple email addresses (#9691)

app/serializers/user_card_serializer.rb

@@ -34,6 +34,8 @@ class UserCardSerializer < BasicUserSerializer
   end
 
   attributes :email,
+             :secondary_emails,
+             :unconfirmed_emails,
              :last_posted_at,
              :last_seen_at,
              :created_at,

app/serializers/web_hook_user_serializer.rb

@@ -8,6 +8,7 @@ class WebHookUserSerializer < UserSerializer
   end
 
   %i{
+    unconfirmed_emails
     can_edit
     can_edit_username
     can_edit_email