Disable pet faces that the item doesn't fit, in new item previews

app/assets/stylesheets/items/_show.sass

@@ -175,6 +175,12 @@ body.items-show
       &:not(:checked) + img
         opacity: .5
 
+      &:disabled + img
+        filter: grayscale(1)
+
+    label:has(input[type=radio]:disabled)
+      cursor: not-allowed
+
     noscript
       position: absolute
       inset: 0

app/helpers/items_helper.rb

@@ -222,6 +222,10 @@ module ItemsHelper
     cookies["DTIOutfitViewerIsPlaying"] == "true"
   end
 
+  def item_fits?(pet_type, all_appearances)
+    all_appearances.any? { |a| a.fits? pet_type }
+  end
+
   def item_zone_partial_fit?(appearances_in_zone, all_appearances)
     appearances_in_zone.size < all_appearances.size
   end

app/models/item.rb

@@ -502,7 +502,7 @@ class Item < ApplicationRecord
   Appearance = Struct.new(:item, :body, :swf_assets) do
     include ActiveModel::Serializers::JSON
     delegate :present?, :empty?, to: :swf_assets
-    delegate :species, to: :body
+    delegate :species, :fits?, to: :body
 
     def attributes
       {item:, body:, swf_assets:}
@@ -522,6 +522,14 @@ class Item < ApplicationRecord
     def attributes
       {id:, species:}
     end
+
+    def fits_all?
+      id == 0
+    end
+
+    def fits?(target)
+      fits_all? || target.body_id == id
+    end
   end
 
   def appearances

app/views/items/show.html.haml

@@ -44,8 +44,11 @@
       - @preview_pet_type_options.each do |pet_type|
         %label
           = radio_button_tag "species_face_id", pet_type.species_id,
-            checked: pet_type == @preview_outfit.pet_type
+            checked: pet_type == @preview_outfit.pet_type,
-          = pet_type_image pet_type, :happy, :face
+            disabled: !item_fits?(pet_type, @all_appearances)
+          = pet_type_image pet_type,
+            item_fits?(pet_type, @all_appearances) ? :happy : :sad,
+            :face
 
   .item-zones-info
     %section