Commit iniziale di eminuxCRM: CRM Rails con pipeline, campagne email e Docker.

Include autenticazione, progetti isolati, mail marketing HTML con SMTP, test A/B e editor WYSIWYG.

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

app/models/contact.rb

@@ -0,0 +1,41 @@
+class Contact < ApplicationRecord
+  include Auditable
+
+  belongs_to :organization
+  has_many :activities, dependent: :nullify
+  has_many :tasks, dependent: :nullify
+  has_many :mailing_recipients, dependent: :nullify
+
+  validates :first_name, :last_name, presence: true
+  validates :preferred_contact_method, inclusion: { in: Catalog::CONTACT_METHODS.keys }, allow_blank: true
+  validates :email, format: { with: URI::MailTo::EMAIL_REGEXP }, allow_blank: true
+
+  before_save :ensure_single_primary, if: -> { primary_contact? && organization_id.present? }
+
+  scope :primary_first, -> { order(primary_contact: :desc, last_name: :asc, first_name: :asc) }
+  scope :search, ->(query) {
+    return all if query.blank?
+
+    q = "%#{sanitize_sql_like(query.strip)}%"
+    where(
+      "first_name ILIKE :q OR last_name ILIKE :q OR email ILIKE :q OR phone ILIKE :q OR mobile ILIKE :q",
+      q: q
+    )
+  }
+
+  def full_name
+    "#{first_name} #{last_name}"
+  end
+
+  def preferred_contact_method_label
+    Catalog.label_for(Catalog::CONTACT_METHODS, preferred_contact_method)
+  end
+
+  private
+
+  def ensure_single_primary
+    scope = organization.contacts
+    scope = scope.where.not(id: id) if persisted?
+    scope.update_all(primary_contact: false)
+  end
+end