Add: #406 ユーザーのカスタムCSS (#825)

* Add: #406 ユーザーのカスタムCSS

* Fix lint

* Fix lint

* カスタムCSSの保存先を変更

* キャッシュを考慮して別URLに変更

app/controllers/settings/preferences/base_controller.rb

@@ -25,7 +25,7 @@ class Settings::Preferences::BaseController < Settings::BaseController
   end
 
   def original_user_params
-    params.require(:user).permit(:locale, :time_zone, chosen_languages: [], settings_attributes: UserSettings.keys)
+    params.require(:user).permit(:locale, :time_zone, :custom_css_text, chosen_languages: [], settings_attributes: UserSettings.keys)
   end
 
   def disabled_visibilities_params

app/controllers/settings/preferences/custom_css_controller.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class Settings::Preferences::CustomCssController < Settings::Preferences::BaseController
+  private
+
+  def after_update_redirect_path
+    settings_preferences_custom_css_path
+  end
+end