Refactor status retrieval in CustomerAppointment to use constant directly

app/models/customer_appointment.rb

@@ -108,10 +108,6 @@ class CustomerAppointment < ActiveRecord::Base
     subject
   end
 
-  def self.statuses
-    STATUSES
-  end
-
   private
 
   def log(msg)

app/views/common/_calendar.html.erb

@@ -45,7 +45,7 @@
 <%# Calendar Status Legend Key %>
 <% 
   # Collect status keys from CustomerAppointment enum
-  statuses = CustomerAppointment.statuses
+  statuses = CustomerAppointment::STATUSES
 %>
 
 <% if statuses.any? %>

app/views/customer_appointments/show.html.erb

@@ -38,7 +38,7 @@
 
 <%# Quick Status Action Buttons %>
 <% 
-  statuses = CustomerAppointment.statuses 
+  statuses = CustomerAppointment::STATUSES 
   current_status = @appointment.status.to_s.parameterize.underscore
 %>
 <div class="appointment-quick-actions">