Show user languages only for "more languages" track

app/views/shared/_user_languages.erb

-<% if !user.languages_from.blank? || !user.languages_to.blank? %><small class="text-2xs uppercase font-light bg-black/10 rounded-sm p-1 ml-1" aria-label="Languages <%= user.name %> can translate" title="Languages <%= user.name %> can translate">
+<% if session.conference.more_languages && (!user.languages_from.blank? || !user.languages_to.blank?) %><small class="text-2xs uppercase font-light bg-black/10 rounded-sm p-1 ml-1" aria-label="Languages <%= user.name %> can translate" title="Languages <%= user.name %> can translate">
   <% if !user.languages_from.blank? && !user.languages_from.split(',').include?(session.language) %>
   <span aria-help="User doesn't understand the language of the talk" title="User doesn't understand the language of the talk">⚠️</span>
   <% end %>

db/migrate/20241226172555_add_more_languages_to_conferences.rb

+class AddMoreLanguagesToConferences < ActiveRecord::Migration[7.1]
+  def change
+    add_column :conferences, :more_languages, :boolean, null: false, default: false
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.1].define(version: 2024_12_25_223515) do
+ActiveRecord::Schema[7.1].define(version: 2024_12_26_172555) do
   create_table "assignments", force: :cascade do |t|
     t.integer "user_id", null: false
     t.integer "session_id", null: false
@@ -43,6 +43,7 @@ ActiveRecord::Schema[7.1].define(version: 2024_12_25_223515) do
     t.string "slug"
     t.string "import_job_class"
     t.string "time_zone"
+    t.boolean "more_languages", default: false, null: false
   end
 
   create_table "crono_jobs", force: :cascade do |t|

db/seeds.rb

@@ -65,6 +65,7 @@ end
 
 Conference.find_or_create_by(slug: "38c3-more").tap do |c|
   c.name = "38th Chaos Communication Congress (more languages)"
+  c.more_languages = true
   c.time_zone = "Berlin"
   c.starts_at = DateTime.parse("27 December 2024 10:30 CET")
   c.ends_at = DateTime.parse("30 December 2024 19:00 CET")