Aggiunge IMAP bounce e flag email non valide nel CRM.

Permette di leggere i bounce dalla stessa MailIdentity SMTP, aggiornare le email in anagrafica e saltare gli indirizzi invalidi nei mailing.

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

app/views/mail_identities/_form.html.erb

@@ -42,7 +42,24 @@
     <div>
       <label class="mb-1 block text-sm font-medium">Password SMTP<%= " (lascia vuoto per non cambiare)" unless mail_identity.new_record? %></label>
       <%= f.password_field :smtp_password, autocomplete: "new-password", class: input_class %>
+      <p class="mt-1 text-xs text-zinc-500">Stessa password usata anche per IMAP (lettura bounce).</p>
     </div>
+    <div class="md:col-span-2 border-t border-zinc-100 pt-4 dark:border-zinc-800">
+      <h2 class="text-sm font-semibold">IMAP (lettura casella / bounce)</h2>
+      <p class="mt-1 text-xs text-zinc-500">Di solito host e porta si compilano da soli in base all’SMTP (es. Aruba → imaps.aruba.it:993).</p>
+    </div>
+    <div>
+      <label class="mb-1 block text-sm font-medium">Host IMAP</label>
+      <%= f.text_field :imap_host, placeholder: mail_identity.inferred_imap_host || "imaps.aruba.it", class: input_class %>
+    </div>
+    <div>
+      <label class="mb-1 block text-sm font-medium">Porta IMAP</label>
+      <%= f.number_field :imap_port, min: 1, max: 65535, class: input_class %>
+    </div>
+    <label class="flex min-h-11 items-center gap-3 rounded-lg border border-zinc-200 px-3 py-2 text-sm dark:border-zinc-700 md:col-span-2">
+      <%= f.check_box :imap_enabled, class: "size-5" %>
+      Abilita lettura IMAP (bounce) con le stesse credenziali SMTP
+    </label>
     <label class="flex min-h-11 items-center gap-3 rounded-lg border border-zinc-200 px-3 py-2 text-sm dark:border-zinc-700">
       <%= f.check_box :verify_ssl, class: "size-5" %>
       Verifica il certificato SSL del server