Sort orders by last name, then first name i.e. the same way bulk order management works

app/models/spree/order.rb

@@ -16,7 +16,8 @@ module Spree
     searchable_attributes :number, :state, :shipment_state, :payment_state, :distributor_id,
                           :order_cycle_id, :email, :total, :customer_id
     searchable_associations :shipping_method, :bill_address, :distributor
-    searchable_scopes :complete, :incomplete
+    searchable_scopes :complete, :incomplete, :sort_by_billing_address_name_asc,
+                      :sort_by_billing_address_name_desc
 
     checkout_flow do
       go_to_state :address
@@ -145,6 +146,14 @@ module Spree
       end
     }
 
+    scope :sort_by_billing_address_name_asc, -> {
+      joins(:bill_address).order("spree_addresses.lastname ASC, spree_addresses.firstname ASC")
+    }
+
+    scope :sort_by_billing_address_name_desc, -> {
+      joins(:bill_address).order("spree_addresses.lastname DESC, spree_addresses.firstname DESC")
+    }
+
     scope :with_line_items_variants_and_products_outer, lambda {
       left_outer_joins(line_items: { variant: :product })
     }

app/views/spree/admin/orders/_table.html.haml

@@ -14,7 +14,7 @@
       %th
         = t(:products_distributor)
 
-      - columns = ['completed_at', 'number', 'state', 'payment_state', 'shipment_state', 'email', 'bill_address_lastname', 'total']
+      - columns = ['completed_at', 'number', 'state', 'payment_state', 'shipment_state', 'email', 'billing_address_name', 'total']
 
       = render partial: "spree/admin/shared/stimulus_sortable_header", collection: columns, as: :column,
         locals: { sorted: params.dig(:q, :s), default: "completed_at desc" }

app/views/spree/admin/orders/_table_row.html.haml

@@ -33,7 +33,7 @@
     %a{ href: "mailto:#{order.email}", target: "_blank" }
       = order.email
   %td
-    = order.bill_address.full_name
+    = order.bill_address.full_name_for_sorting
   %td.align-center
     %span
       = order.display_total