Remove anemic concern

Colors are a card concern.

app/helpers/workflows_helper.rb

@@ -10,6 +10,6 @@ module WorkflowsHelper
   end
 
   def stage_color(stage)
-    stage.color.presence || Colorable::DEFAULT_COLOR
+    stage.color.presence || Card::DEFAULT_COLOR
   end
 end

app/models/card/colored.rb

@@ -1,8 +1,11 @@
 module Card::Colored
   extend ActiveSupport::Concern
 
+  COLORS = %w[ #3b3633 #67695e #eb7a32 #bf7c2b #c09c6f #746b1e #2c6da8 #5d618f #663251 #ff63a8 ]
+  DEFAULT_COLOR = "#2c6da8"
+
   def color
-    color_from_stage || Colorable::DEFAULT_COLOR
+    color_from_stage || DEFAULT_COLOR
   end
 
   private

app/models/colorable.rb

@@ -1,6 +0,0 @@
-module Colorable
-  extend ActiveSupport::Concern
-
-  COLORS = %w[ #3b3633 #67695e #eb7a32 #bf7c2b #c09c6f #746b1e #2c6da8 #5d618f #663251 #ff63a8 ]
-  DEFAULT_COLOR = "#2c6da8"
-end

app/views/workflows/stages/_color.html.erb

@@ -6,7 +6,7 @@
 
   <dialog class="color-picker panel fill-white shadow gap-half" data-dialog-target="dialog" data-action="keydown.esc->dialog#close click@document->dialog#closeOnClickOutside">
     <%= form_with model: stage, url: workflow_stage_path(stage.workflow, stage), class: "flex gap-half", data: { controller: "form", action: "change->form#submit" } do |form| %>
-      <% Colorable::COLORS.each do |color| %>
+      <% Card::COLORS.each do |color| %>
         <span class="color-picker__color">
           <label class="btn btn--circle" style="--btn-background: <%= color %>" title="<%= color %>">
             <%= form.radio_button :color, color %>

test/models/card/colored_test.rb

@@ -2,11 +2,11 @@ require "test_helper"
 
 class Card::ColoredTest < ActiveSupport::TestCase
   test "use default color no stage" do
-    assert_equal Colorable::DEFAULT_COLOR, cards(:logo).color
+    assert_equal Card::DEFAULT_COLOR, cards(:logo).color
   end
 
   test "use default color not in doing stage" do
-    assert_equal Colorable::DEFAULT_COLOR, cards(:text).color
+    assert_equal Card::DEFAULT_COLOR, cards(:text).color
   end
 
   test "infer color from stage when in doing stage" do