Add missing files :(

app/models/bulk_email_session.rb

@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+require 'securerandom'
+
+class BulkEmailSession < ApplicationRecord
+  before_validation :generate_token, on: :create
+  before_validation :set_expiration, on: :create
+
+  validates :token, presence: true, uniqueness: true
+  validates :recipient_emails, presence: true
+
+  serialize :recipient_emails, type: Array
+
+  # Sessions expire after 1 hour to prevent database bloat
+  EXPIRATION_TIME = 1.hour
+
+  scope :active, -> { where('expires_at > ?', Time.current) }
+  scope :expired, -> { where('expires_at <= ?', Time.current) }
+
+  def self.cleanup_expired!
+    expired.delete_all
+  end
+
+  def expired?
+    expires_at <= Time.current
+  end
+
+  def recipient_count
+    recipient_emails&.size || 0
+  end
+
+  private
+
+  def generate_token
+    return if token.present?
+
+    self.token = SecureRandom.hex(16)
+  end
+
+  def set_expiration
+    return if expires_at.present?
+
+    self.expires_at = EXPIRATION_TIME.from_now
+  end
+end