chore: Sync pre-chat fields after custom attribute update (#4692)

app/jobs/inboxes/update_widget_pre_chat_custom_fields_job.rb

@@ -0,0 +1,21 @@
+class Inboxes::UpdateWidgetPreChatCustomFieldsJob < ApplicationJob
+  queue_as :default
+
+  def perform(account, custom_attribute)
+    attribute_key = custom_attribute['attribute_key']
+    account.web_widgets.all.find_each do |web_widget|
+      pre_chat_fields = web_widget.pre_chat_form_options['pre_chat_fields']
+      pre_chat_fields.each_with_index do |pre_chat_field, index|
+        next unless pre_chat_field['name'] == attribute_key
+
+        web_widget.pre_chat_form_options['pre_chat_fields'][index] =
+          pre_chat_field.deep_merge({
+                                      'label' => custom_attribute['attribute_display_name'],
+                                      'placeholder' => custom_attribute['attribute_display_name'],
+                                      'values' => custom_attribute['attribute_values']
+                                    })
+      end
+      web_widget.save!
+    end
+  end
+end