Aggiunge filtri avanzati per i destinatari delle campagne email.

La scelta della lista passa da un wizard a tre passi, con anteprima del conteggio e lista congelata solo dopo la conferma.

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

app/models/mailing.rb

@@ -22,6 +22,7 @@ class Mailing < ApplicationRecord
   validates :send_window_start_minutes, :send_window_end_minutes, presence: true, if: :send_window_enabled?
   validate :send_window_order
   clears_blank_html :body_html, :body_html_b
+  before_validation :sync_audience_filters
 
   scope :recent, -> { order(created_at: :desc) }
   scope :for_project, ->(project) { where(project_id: project.id) }
@@ -33,7 +34,15 @@ class Mailing < ApplicationRecord
   end
 
   def audience_label
-    Catalog.label_for(Catalog::MAILING_AUDIENCES, audience)
+    parsed_audience_filters.summary_parts.join(" · ")
+  end
+
+  def parsed_audience_filters
+    Mailings::AudienceFilters.new(audience_filters.presence || { "preset" => audience.presence || "to_send" })
+  end
+
+  def audience_query
+    Mailings::AudienceQuery.new(project, parsed_audience_filters, mailing: self)
   end
 
   def ab_assignment_label
@@ -219,6 +228,25 @@ class Mailing < ApplicationRecord
 
   private
 
+  def sync_audience_filters
+    source = stringify_audience_filters(audience_filters)
+    if will_save_change_to_audience? && !will_save_change_to_audience_filters?
+      source["preset"] = audience
+    elsif source["preset"].blank?
+      source["preset"] = audience.presence || "to_send"
+    end
+
+    filters = Mailings::AudienceFilters.new(source)
+    self.audience_filters = filters.to_h
+    self.audience = filters.preset
+  end
+
+  def stringify_audience_filters(value)
+    return {} if value.blank?
+
+    value.respond_to?(:to_unsafe_h) ? value.to_unsafe_h.deep_stringify_keys : value.to_h.deep_stringify_keys
+  end
+
   def send_window_order
     return unless send_window_enabled?
     return if send_window_start_minutes.blank? || send_window_end_minutes.blank?