add app tour

app/controllers/user_configs_controller.rb

@@ -5,7 +5,8 @@ class UserConfigsController < ApplicationController
   authorize_resource :user_config
 
   ALLOWED_KEYS = [
-    UserConfig::RECEIVE_COMPLETED_EMAIL
+    UserConfig::RECEIVE_COMPLETED_EMAIL,
+    UserConfig::SHOW_APP_TOUR
   ].freeze
 
   InvalidKey = Class.new(StandardError)
@@ -28,6 +29,7 @@ class UserConfigsController < ApplicationController
   def user_config_params
     params.required(:user_config).permit(:key, :value, { value: {} }, { value: [] }).tap do |attrs|
       attrs[:value] = attrs[:value] == '1' if attrs[:value].in?(%w[1 0])
+      attrs[:value] = attrs[:value] == 'true' if attrs[:value].in?(%w[true false])
     end
   end
 end