A lot :)

app/models/link.rb

@@ -1,7 +1,11 @@
-require 'net/http'
+# frozen_string_literal: true
+
+require "net/http"
 
 class Link < ApplicationRecord
   belongs_to :link_category
+  has_and_belongs_to_many :checks
+
   has_rich_text :description_html
 
   validates :url, :text, presence: true
@@ -10,13 +14,21 @@ class Link < ApplicationRecord
 
   before_validation :ensure_absolute_url
 
+  def t_text
+    text
+  end
+
   def ok?
-    fail_count == 0
+    fail_count.zero?
+  end
+
+  def to_s
+    "#{text} (#{url})"
   end
 
   private
 
-  USER_AGENT = 'Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0'
+  USER_AGENT = "Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0"
 
   def check_url(input = url, add_error = true)
     response = begin