```ruby
class Library::ItemDecorator < ApplicationDecorator
  def item
    @model
  end

  def link
    h.link_to item.title, h.url_for(item.component)
  end

  def icon
    h.content_tag(:span, nil, class: h.dom_class(item.component))
  end

  def created_at
    h.content_tag(:time, datetime: item.created_at, title: item.created_at.to_s(:long)) do
      h.t("libraries.show.item_created", time_ago: h.time_ago_in_words(item.created_at))
    end
  end
end
```

Add icon class to library item list.
user
```ruby
class Library::ItemDecorator < ApplicationDecorator
  def item
    @model
  end

  def link
    h.link_to item.title, h.url_for(item.component)
  end

  def icon
    h.content_tag(:span, nil, class: "icon #{h.dom_class(item.component)}")
  end

  def created_at
    h.content_tag(:time, datetime: item.created_at, title: item.created_at.to_s(:long)) do
      h.t("libraries.show.item_created", time_ago: h.time_ago_in_words(item.created_at))
    end
  end
end
```
assistant