Aggiunge pulsante per fermare un invio email in corso.

Permette di annullare i destinatari ancora in coda mantenendo le email già inviate.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/models/mailing_recipient.rb

@@ -47,10 +47,13 @@ class MailingRecipient < ApplicationRecord
   def deliver!
     with_lock do
       return if status.in?(%w[sent skipped])
+      return abort_delivery!("invio annullato") unless mailing.sending?
 
       update!(status: "queued")
     end
 
+    return unless mailing.sending?
+
     html = rendered_html
     subject_line = rendered_subject_line
     CampaignMailer.outreach(self, html: html, subject: subject_line).deliver_now
@@ -63,6 +66,10 @@ class MailingRecipient < ApplicationRecord
 
   private
 
+  def abort_delivery!(reason)
+    update!(status: "skipped", skip_reason: reason)
+  end
+
   def record_success!(subject_line)
     transaction do
       update!(status: "sent", sent_at: Time.current, rendered_subject: subject_line, error_message: nil)