diff --git a/app/channels/application_cable/channel.rb b/app/channels/application_cable/channel.rb
index 9aec230..88942fe 100644
--- a/app/channels/application_cable/channel.rb
+++ b/app/channels/application_cable/channel.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module ApplicationCable
diff --git a/app/channels/application_cable/connection.rb b/app/channels/application_cable/connection.rb
index 8d6c2a1..ab575d6 100644
--- a/app/channels/application_cable/connection.rb
+++ b/app/channels/application_cable/connection.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module ApplicationCable
diff --git a/app/controllers/affinities_controller.rb b/app/controllers/affinities_controller.rb
index 731ba63..63849b2 100644
--- a/app/controllers/affinities_controller.rb
+++ b/app/controllers/affinities_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class AffinitiesController < ApplicationController
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index d1cd17b..025dc85 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class ApplicationController < ActionController::Base
diff --git a/app/controllers/captcha_controller.rb b/app/controllers/captcha_controller.rb
index 7ba4584..6c3f3ca 100644
--- a/app/controllers/captcha_controller.rb
+++ b/app/controllers/captcha_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class CaptchaController < ApplicationController
diff --git a/app/controllers/expenses_controller.rb b/app/controllers/expenses_controller.rb
index d611a1c..3195a8b 100644
--- a/app/controllers/expenses_controller.rb
+++ b/app/controllers/expenses_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class ExpensesController < ApplicationController
diff --git a/app/controllers/groups_controller.rb b/app/controllers/groups_controller.rb
index 76296af..08334aa 100644
--- a/app/controllers/groups_controller.rb
+++ b/app/controllers/groups_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class GroupsController < ApplicationController
diff --git a/app/controllers/guests_controller.rb b/app/controllers/guests_controller.rb
index 3c3dba1..1d872fa 100644
--- a/app/controllers/guests_controller.rb
+++ b/app/controllers/guests_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'csv'
diff --git a/app/controllers/summary_controller.rb b/app/controllers/summary_controller.rb
index 42e6dc6..0d3f655 100644
--- a/app/controllers/summary_controller.rb
+++ b/app/controllers/summary_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class SummaryController < ApplicationController
diff --git a/app/controllers/tables_arrangements_controller.rb b/app/controllers/tables_arrangements_controller.rb
index 6584ffe..c09d453 100644
--- a/app/controllers/tables_arrangements_controller.rb
+++ b/app/controllers/tables_arrangements_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class TablesArrangementsController < ApplicationController
diff --git a/app/controllers/tokens_controller.rb b/app/controllers/tokens_controller.rb
index e0ce15d..a0ee546 100644
--- a/app/controllers/tokens_controller.rb
+++ b/app/controllers/tokens_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class TokensController < ApplicationController
diff --git a/app/controllers/users/confirmations_controller.rb b/app/controllers/users/confirmations_controller.rb
index f204227..01eb91e 100644
--- a/app/controllers/users/confirmations_controller.rb
+++ b/app/controllers/users/confirmations_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module Users
diff --git a/app/controllers/users/registrations_controller.rb b/app/controllers/users/registrations_controller.rb
index 1873dde..f261e90 100644
--- a/app/controllers/users/registrations_controller.rb
+++ b/app/controllers/users/registrations_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module Users
diff --git a/app/controllers/users/sessions_controller.rb b/app/controllers/users/sessions_controller.rb
index 67c250f..4d7b6a8 100644
--- a/app/controllers/users/sessions_controller.rb
+++ b/app/controllers/users/sessions_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module Users
diff --git a/app/extensions/tree_node_extension.rb b/app/extensions/tree_node_extension.rb
index ccb6a72..6894dd7 100644
--- a/app/extensions/tree_node_extension.rb
+++ b/app/extensions/tree_node_extension.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module TreeNodeExtension
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 15b06f0..9dbd98c 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module ApplicationHelper
diff --git a/app/helpers/expenses_helper.rb b/app/helpers/expenses_helper.rb
index 1b8b4a0..0b8c324 100644
--- a/app/helpers/expenses_helper.rb
+++ b/app/helpers/expenses_helper.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module ExpensesHelper
diff --git a/app/helpers/groups_helper.rb b/app/helpers/groups_helper.rb
index 46abae7..feda408 100644
--- a/app/helpers/groups_helper.rb
+++ b/app/helpers/groups_helper.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module GroupsHelper
diff --git a/app/helpers/guests_helper.rb b/app/helpers/guests_helper.rb
index 10452d8..369b8ed 100644
--- a/app/helpers/guests_helper.rb
+++ b/app/helpers/guests_helper.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module GuestsHelper
diff --git a/app/helpers/tables_arrangements_helper.rb b/app/helpers/tables_arrangements_helper.rb
index 1550d07..6353e46 100644
--- a/app/helpers/tables_arrangements_helper.rb
+++ b/app/helpers/tables_arrangements_helper.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module TablesArrangementsHelper
diff --git a/app/jobs/application_job.rb b/app/jobs/application_job.rb
index bef3959..561fb56 100644
--- a/app/jobs/application_job.rb
+++ b/app/jobs/application_job.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class ApplicationJob < ActiveJob::Base
diff --git a/app/jobs/table_simulator_job.rb b/app/jobs/table_simulator_job.rb
index bea7bc5..51b7256 100644
--- a/app/jobs/table_simulator_job.rb
+++ b/app/jobs/table_simulator_job.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class TableSimulatorJob < ApplicationJob
diff --git a/app/mailers/application_mailer.rb b/app/mailers/application_mailer.rb
index d84cb6e..b28db31 100644
--- a/app/mailers/application_mailer.rb
+++ b/app/mailers/application_mailer.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class ApplicationMailer < ActionMailer::Base
diff --git a/app/models/application_record.rb b/app/models/application_record.rb
index 08dc537..61b9d31 100644
--- a/app/models/application_record.rb
+++ b/app/models/application_record.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class ApplicationRecord < ActiveRecord::Base
diff --git a/app/models/expense.rb b/app/models/expense.rb
index 3ae5f8f..66b32f3 100644
--- a/app/models/expense.rb
+++ b/app/models/expense.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # == Schema Information
diff --git a/app/models/group.rb b/app/models/group.rb
index 8be4d14..2db28ed 100644
--- a/app/models/group.rb
+++ b/app/models/group.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # == Schema Information
diff --git a/app/models/group_affinity.rb b/app/models/group_affinity.rb
index 38b3609..8e70d59 100644
--- a/app/models/group_affinity.rb
+++ b/app/models/group_affinity.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # == Schema Information
diff --git a/app/models/guest.rb b/app/models/guest.rb
index 7105dbb..ad0542f 100644
--- a/app/models/guest.rb
+++ b/app/models/guest.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # == Schema Information
diff --git a/app/models/seat.rb b/app/models/seat.rb
index d1ac3d7..9c31c42 100644
--- a/app/models/seat.rb
+++ b/app/models/seat.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # == Schema Information
diff --git a/app/models/tables_arrangement.rb b/app/models/tables_arrangement.rb
index bc52eb8..adece9a 100644
--- a/app/models/tables_arrangement.rb
+++ b/app/models/tables_arrangement.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # == Schema Information
diff --git a/app/models/user.rb b/app/models/user.rb
index f87f382..ff46fff 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # == Schema Information
diff --git a/app/models/wedding.rb b/app/models/wedding.rb
index 7cd5b41..83525b5 100644
--- a/app/models/wedding.rb
+++ b/app/models/wedding.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # == Schema Information
diff --git a/app/queries/expenses/total_query.rb b/app/queries/expenses/total_query.rb
index 3b9008c..ae4fe65 100644
--- a/app/queries/expenses/total_query.rb
+++ b/app/queries/expenses/total_query.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module Expenses
diff --git a/app/queries/groups/summary_query.rb b/app/queries/groups/summary_query.rb
index 08ee519..81c91b4 100644
--- a/app/queries/groups/summary_query.rb
+++ b/app/queries/groups/summary_query.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module Groups
diff --git a/app/serializers/serializable_group.rb b/app/serializers/serializable_group.rb
index 64685e0..b3e2258 100644
--- a/app/serializers/serializable_group.rb
+++ b/app/serializers/serializable_group.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class SerializableGroup < JSONAPI::Serializable::Resource
diff --git a/app/serializers/serializable_guest.rb b/app/serializers/serializable_guest.rb
index 8f05eb1..ee4bac1 100644
--- a/app/serializers/serializable_guest.rb
+++ b/app/serializers/serializable_guest.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class SerializableGuest < JSONAPI::Serializable::Resource
diff --git a/app/services/affinity_groups_hierarchy.rb b/app/services/affinity_groups_hierarchy.rb
index ba95614..cd448de 100644
--- a/app/services/affinity_groups_hierarchy.rb
+++ b/app/services/affinity_groups_hierarchy.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class AffinityGroupsHierarchy < Array
diff --git a/app/services/libre_captcha.rb b/app/services/libre_captcha.rb
index 37744e2..a3843da 100644
--- a/app/services/libre_captcha.rb
+++ b/app/services/libre_captcha.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class LibreCaptcha
diff --git a/app/services/tables/discomfort_calculator.rb b/app/services/tables/discomfort_calculator.rb
index a65253e..6a7ebcf 100644
--- a/app/services/tables/discomfort_calculator.rb
+++ b/app/services/tables/discomfort_calculator.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module Tables
diff --git a/app/services/tables/distribution.rb b/app/services/tables/distribution.rb
index 50b04c2..87dccb0 100644
--- a/app/services/tables/distribution.rb
+++ b/app/services/tables/distribution.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require_relative '../../extensions/tree_node_extension'
diff --git a/app/services/tables/shift.rb b/app/services/tables/shift.rb
index c07ccdb..d5592d9 100644
--- a/app/services/tables/shift.rb
+++ b/app/services/tables/shift.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module Tables
diff --git a/app/services/tables/swap.rb b/app/services/tables/swap.rb
index 565caf8..04abc18 100644
--- a/app/services/tables/swap.rb
+++ b/app/services/tables/swap.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module Tables
diff --git a/app/services/tables/table.rb b/app/services/tables/table.rb
index aa62a47..cc05ea0 100644
--- a/app/services/tables/table.rb
+++ b/app/services/tables/table.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module Tables
diff --git a/app/services/vns/engine.rb b/app/services/vns/engine.rb
index 26c5bab..d66c80b 100644
--- a/app/services/vns/engine.rb
+++ b/app/services/vns/engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module VNS
diff --git a/app/views/layouts/mailer.html.erb b/app/views/layouts/mailer.html.erb
index b3f319f..a8eafc7 100644
--- a/app/views/layouts/mailer.html.erb
+++ b/app/views/layouts/mailer.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 22024-2025 LibreWeddingPlanner contributors %>
+
 <%<%<%<!DOCTYPE html>
 <html>
   <head>
diff --git a/app/views/layouts/mailer.text.erb b/app/views/layouts/mailer.text.erb
index 8404d89..0769757 100644
--- a/app/views/layouts/mailer.text.erb
+++ b/app/views/layouts/mailer.text.erb
@@ -1 +1,3 @@
+<%# Copyright (C) 22024-2025 LibreWeddingPlanner contributors %>
+
 <%<%<%<%= yield %>
diff --git a/app/views/users/mailer/confirmation_instructions.html.erb b/app/views/users/mailer/confirmation_instructions.html.erb
index 26dc9ed..f477218 100644
--- a/app/views/users/mailer/confirmation_instructions.html.erb
+++ b/app/views/users/mailer/confirmation_instructions.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 22024-2025 LibreWeddingPlanner contributors %>
+
 <%<%<%<p>Welcome <%= @email %>!</p>
 
 <p>You can confirm your account email through the link below:</p>
diff --git a/app/views/users/mailer/email_changed.html.erb b/app/views/users/mailer/email_changed.html.erb
index 7c3a50f..0e68a0a 100644
--- a/app/views/users/mailer/email_changed.html.erb
+++ b/app/views/users/mailer/email_changed.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 22024-2025 LibreWeddingPlanner contributors %>
+
 <%<%<%<p>Hello <%= @email %>!</p>
 
 <% if @resource.try(:unconfirmed_email?) %>
diff --git a/app/views/users/mailer/password_change.html.erb b/app/views/users/mailer/password_change.html.erb
index 7bca9b7..bf4de87 100644
--- a/app/views/users/mailer/password_change.html.erb
+++ b/app/views/users/mailer/password_change.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 22024-2025 LibreWeddingPlanner contributors %>
+
 <%<%<%<p>Hello <%= @resource.email %>!</p>
 
 <p>We're contacting you to notify you that your password has been changed.</p>
diff --git a/app/views/users/mailer/reset_password_instructions.html.erb b/app/views/users/mailer/reset_password_instructions.html.erb
index a2e70db..0499866 100644
--- a/app/views/users/mailer/reset_password_instructions.html.erb
+++ b/app/views/users/mailer/reset_password_instructions.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 22024-2025 LibreWeddingPlanner contributors %>
+
 <%<%<%<p>Hello <%= @resource.email %>!</p>
 
 <p>Someone has requested a link to change your password. You can do this through the link below.</p>
diff --git a/app/views/users/mailer/unlock_instructions.html.erb b/app/views/users/mailer/unlock_instructions.html.erb
index 86d82c0..b59cb33 100644
--- a/app/views/users/mailer/unlock_instructions.html.erb
+++ b/app/views/users/mailer/unlock_instructions.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 22024-2025 LibreWeddingPlanner contributors %>
+
 <%<%<%<p>Hello <%= @resource.email %>!</p>
 
 <p>Your account has been locked due to an excessive number of unsuccessful sign in attempts.</p>
diff --git a/config/application.rb b/config/application.rb
index 7c6b36e..1795a6f 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 require_relative 'boot'
 
 require 'rails'
diff --git a/config/boot.rb b/config/boot.rb
index 988a5dd..4bebfef 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
 
 require "bundler/setup" # Set up gems listed in the Gemfile.
diff --git a/config/environment.rb b/config/environment.rb
index cac5315..49c0fb1 100644
--- a/config/environment.rb
+++ b/config/environment.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # Load the Rails application.
 require_relative "application"
 
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 3cee377..232e88e 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 require "active_support/core_ext/integer/time"
 
 Rails.application.configure do
diff --git a/config/environments/production.rb b/config/environments/production.rb
index e3f6d9b..4db7dca 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 require "active_support/core_ext/integer/time"
 
 Rails.application.configure do
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 3ada93b..0982e19 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 require "active_support/core_ext/integer/time"
 
 # The test environment is used exclusively to run your application's
diff --git a/config/importmap.rb b/config/importmap.rb
index 909dfc5..7ec75cd 100644
--- a/config/importmap.rb
+++ b/config/importmap.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # Pin npm packages by running ./bin/importmap
 
 pin "application"
diff --git a/config/initializers/acts_as_tenant.rb b/config/initializers/acts_as_tenant.rb
index f6c78a8..fd8890d 100644
--- a/config/initializers/acts_as_tenant.rb
+++ b/config/initializers/acts_as_tenant.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 ActsAsTenant.configure do |config|
   config.require_tenant = !Rails.env.test?
 end
\ No newline at end of file
diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
index 2eeef96..4772d1a 100644
--- a/config/initializers/assets.rb
+++ b/config/initializers/assets.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
diff --git a/config/initializers/colors.rb b/config/initializers/colors.rb
index 042a749..ea065fa 100644
--- a/config/initializers/colors.rb
+++ b/config/initializers/colors.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 Chroma.define_palette :decreasing_saturation do
   spin(20).desaturate(40)
   spin(-20).desaturate(40)
diff --git a/config/initializers/content_security_policy.rb b/config/initializers/content_security_policy.rb
index b3076b3..8798db8 100644
--- a/config/initializers/content_security_policy.rb
+++ b/config/initializers/content_security_policy.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # Be sure to restart your server when you modify this file.
 
 # Define an application-wide content security policy.
diff --git a/config/initializers/cors.rb b/config/initializers/cors.rb
index a908920..ce186ed 100644
--- a/config/initializers/cors.rb
+++ b/config/initializers/cors.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # config/initializers/cors.rb
 
 Rails.application.config.middleware.insert_before 0, Rack::Cors do
diff --git a/config/initializers/devise.rb b/config/initializers/devise.rb
index b407122..3977aa9 100644
--- a/config/initializers/devise.rb
+++ b/config/initializers/devise.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # Assuming you have not yet modified this file, each configuration option below
diff --git a/config/initializers/filter_parameter_logging.rb b/config/initializers/filter_parameter_logging.rb
index c2d89e2..1be5be3 100644
--- a/config/initializers/filter_parameter_logging.rb
+++ b/config/initializers/filter_parameter_logging.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # Be sure to restart your server when you modify this file.
 
 # Configure parameters to be partially matched (e.g. passw matches password) and filtered from the log file.
diff --git a/config/initializers/inflections.rb b/config/initializers/inflections.rb
index 157a851..2a6b3c4 100644
--- a/config/initializers/inflections.rb
+++ b/config/initializers/inflections.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # Be sure to restart your server when you modify this file.
 
 # Add new inflection rules using the following format. Inflections
diff --git a/config/initializers/permissions_policy.rb b/config/initializers/permissions_policy.rb
index 7db3b95..f281e9b 100644
--- a/config/initializers/permissions_policy.rb
+++ b/config/initializers/permissions_policy.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # Be sure to restart your server when you modify this file.
 
 # Define an application-wide HTTP permissions policy. For further
diff --git a/config/initializers/rswag_api.rb b/config/initializers/rswag_api.rb
index c4462b2..42deb17 100644
--- a/config/initializers/rswag_api.rb
+++ b/config/initializers/rswag_api.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 Rswag::Api.configure do |c|
 
   # Specify a root folder where Swagger JSON files are located
diff --git a/config/initializers/rswag_ui.rb b/config/initializers/rswag_ui.rb
index 30172aa..a50e133 100644
--- a/config/initializers/rswag_ui.rb
+++ b/config/initializers/rswag_ui.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 Rswag::Ui.configure do |c|
 
   # List the Swagger endpoints that you want to be documented through the
diff --git a/config/initializers/ruby_extensions.rb b/config/initializers/ruby_extensions.rb
index 490dadf..47091de 100644
--- a/config/initializers/ruby_extensions.rb
+++ b/config/initializers/ruby_extensions.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class Numeric
   def to_currency
     Money.from_amount(self, "EUR").format
diff --git a/config/puma.rb b/config/puma.rb
index afa809b..128df0b 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # This configuration file will be evaluated by Puma. The top-level methods that
 # are invoked here are part of Puma's configuration DSL. For more information
 # about methods provided by the DSL, see https://puma.io/puma/Puma/DSL.html.
diff --git a/config/routes.rb b/config/routes.rb
index 3f4685b..f53e7f1 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 Rails.application.routes.draw do
   mount LetterOpenerWeb::Engine, at: "/letter_opener" if Rails.env.development?
   get 'token' => 'tokens#show', as: :token
diff --git a/db/migrate/20240711175425_create_expenses.rb b/db/migrate/20240711175425_create_expenses.rb
index 63d0f2b..52fa269 100644
--- a/db/migrate/20240711175425_create_expenses.rb
+++ b/db/migrate/20240711175425_create_expenses.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class CreateExpenses < ActiveRecord::Migration[7.1]
   def change
     create_enum :pricing_types, ["fixed", "per_person"]
diff --git a/db/migrate/20240711180753_create_guests.rb b/db/migrate/20240711180753_create_guests.rb
index 1280006..d2f876a 100644
--- a/db/migrate/20240711180753_create_guests.rb
+++ b/db/migrate/20240711180753_create_guests.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class CreateGuests < ActiveRecord::Migration[7.1]
   def change
     create_table :guests, id: :uuid do |t|
diff --git a/db/migrate/20240711181626_acts_as_taggable_on_migration.acts_as_taggable_on_engine.rb b/db/migrate/20240711181626_acts_as_taggable_on_migration.acts_as_taggable_on_engine.rb
index 8b97ba6..f1709ca 100644
--- a/db/migrate/20240711181626_acts_as_taggable_on_migration.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181626_acts_as_taggable_on_migration.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 1)
diff --git a/db/migrate/20240711181627_add_missing_unique_indices.acts_as_taggable_on_engine.rb b/db/migrate/20240711181627_add_missing_unique_indices.acts_as_taggable_on_engine.rb
index ebd46fd..a1f7d1c 100644
--- a/db/migrate/20240711181627_add_missing_unique_indices.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181627_add_missing_unique_indices.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 2)
diff --git a/db/migrate/20240711181628_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb b/db/migrate/20240711181628_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb
index d17afe8..078b0c0 100644
--- a/db/migrate/20240711181628_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181628_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 3)
diff --git a/db/migrate/20240711181629_add_missing_taggable_index.acts_as_taggable_on_engine.rb b/db/migrate/20240711181629_add_missing_taggable_index.acts_as_taggable_on_engine.rb
index 52f696b..126aa38 100644
--- a/db/migrate/20240711181629_add_missing_taggable_index.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181629_add_missing_taggable_index.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 4)
diff --git a/db/migrate/20240711181630_change_collation_for_tag_names.acts_as_taggable_on_engine.rb b/db/migrate/20240711181630_change_collation_for_tag_names.acts_as_taggable_on_engine.rb
index 47fd928..fec8036 100644
--- a/db/migrate/20240711181630_change_collation_for_tag_names.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181630_change_collation_for_tag_names.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 5)
diff --git a/db/migrate/20240711181631_add_missing_indexes_on_taggings.acts_as_taggable_on_engine.rb b/db/migrate/20240711181631_add_missing_indexes_on_taggings.acts_as_taggable_on_engine.rb
index f5aaaf9..5f98782 100644
--- a/db/migrate/20240711181631_add_missing_indexes_on_taggings.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181631_add_missing_indexes_on_taggings.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 6)
diff --git a/db/migrate/20240711181632_add_tenant_to_taggings.acts_as_taggable_on_engine.rb b/db/migrate/20240711181632_add_tenant_to_taggings.acts_as_taggable_on_engine.rb
index b62b660..16fc678 100644
--- a/db/migrate/20240711181632_add_tenant_to_taggings.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181632_add_tenant_to_taggings.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 7)
diff --git a/db/migrate/20240724181756_create_tables_arrangements.rb b/db/migrate/20240724181756_create_tables_arrangements.rb
index c05f6dc..81defbc 100644
--- a/db/migrate/20240724181756_create_tables_arrangements.rb
+++ b/db/migrate/20240724181756_create_tables_arrangements.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class CreateTablesArrangements < ActiveRecord::Migration[7.1]
   def change
     create_table :tables_arrangements, id: :uuid do |t|
diff --git a/db/migrate/20240724181853_create_seats.rb b/db/migrate/20240724181853_create_seats.rb
index 74f5b7b..a4fa0ae 100644
--- a/db/migrate/20240724181853_create_seats.rb
+++ b/db/migrate/20240724181853_create_seats.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class CreateSeats < ActiveRecord::Migration[7.1]
   def change
     create_table :seats, id: :uuid do |t|
diff --git a/db/migrate/20240811142121_create_groups.rb b/db/migrate/20240811142121_create_groups.rb
index 0246978..cad993a 100644
--- a/db/migrate/20240811142121_create_groups.rb
+++ b/db/migrate/20240811142121_create_groups.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class CreateGroups < ActiveRecord::Migration[7.1]
   def change
     create_table :groups, id: :uuid do |t|
diff --git a/db/migrate/20240811143801_add_parent_to_group.rb b/db/migrate/20240811143801_add_parent_to_group.rb
index 575af38..868ea79 100644
--- a/db/migrate/20240811143801_add_parent_to_group.rb
+++ b/db/migrate/20240811143801_add_parent_to_group.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class AddParentToGroup < ActiveRecord::Migration[7.1]
   def change
     add_reference :groups, :parent, type: :uuid, index: true, foreign_key: { to_table: :groups }
diff --git a/db/migrate/20240811154115_add_group_to_guest.rb b/db/migrate/20240811154115_add_group_to_guest.rb
index d4e2bd4..b7df5aa 100644
--- a/db/migrate/20240811154115_add_group_to_guest.rb
+++ b/db/migrate/20240811154115_add_group_to_guest.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class AddGroupToGuest < ActiveRecord::Migration[7.1]
   def change
     add_reference :guests, :group, null: false, foreign_key: true, type: :uuid
diff --git a/db/migrate/20240811170021_add_status_to_guest.rb b/db/migrate/20240811170021_add_status_to_guest.rb
index cd7be5b..ec92086 100644
--- a/db/migrate/20240811170021_add_status_to_guest.rb
+++ b/db/migrate/20240811170021_add_status_to_guest.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class AddStatusToGuest < ActiveRecord::Migration[7.1]
   def change
     add_column :guests, :status, :integer, default: 0
diff --git a/db/migrate/20241101181052_drop_taggable_tables.rb b/db/migrate/20241101181052_drop_taggable_tables.rb
index 1759e6a..1ece831 100644
--- a/db/migrate/20241101181052_drop_taggable_tables.rb
+++ b/db/migrate/20241101181052_drop_taggable_tables.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class DropTaggableTables < ActiveRecord::Migration[7.2]
   def change
     drop_table 'taggings', force: :cascade do |t|
diff --git a/db/migrate/20241103072808_add_name_to_tables_arrangements.rb b/db/migrate/20241103072808_add_name_to_tables_arrangements.rb
index 7f38f58..1893200 100644
--- a/db/migrate/20241103072808_add_name_to_tables_arrangements.rb
+++ b/db/migrate/20241103072808_add_name_to_tables_arrangements.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class AddNameToTablesArrangements < ActiveRecord::Migration[7.2]
   def change
     add_column :tables_arrangements, :name, :string, null: false
diff --git a/db/migrate/20241103075705_solid_queue_install.rb b/db/migrate/20241103075705_solid_queue_install.rb
index 4dfb4d0..fcd7627 100644
--- a/db/migrate/20241103075705_solid_queue_install.rb
+++ b/db/migrate/20241103075705_solid_queue_install.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class SolidQueueInstall < ActiveRecord::Migration[7.2]
   def change
     create_table 'solid_queue_blocked_executions', force: :cascade do |t|
diff --git a/db/migrate/20241103093955_remove_email_from_guests.rb b/db/migrate/20241103093955_remove_email_from_guests.rb
index f09bced..cde2f00 100644
--- a/db/migrate/20241103093955_remove_email_from_guests.rb
+++ b/db/migrate/20241103093955_remove_email_from_guests.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class RemoveEmailFromGuests < ActiveRecord::Migration[7.2]
   def change
     remove_column :guests, :email, :string
diff --git a/db/migrate/20241103133122_add_color_to_group.rb b/db/migrate/20241103133122_add_color_to_group.rb
index f73d988..a031638 100644
--- a/db/migrate/20241103133122_add_color_to_group.rb
+++ b/db/migrate/20241103133122_add_color_to_group.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class AddColorToGroup < ActiveRecord::Migration[7.2]
   def change
     add_column :groups, :color, :string
diff --git a/db/migrate/20241111063741_merge_guest_names.rb b/db/migrate/20241111063741_merge_guest_names.rb
index 21cdfa6..3b2690c 100644
--- a/db/migrate/20241111063741_merge_guest_names.rb
+++ b/db/migrate/20241111063741_merge_guest_names.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class MergeGuestNames < ActiveRecord::Migration[8.0]
   def change
     add_column :guests, :name, :string
diff --git a/db/migrate/20241130095753_devise_create_users.rb b/db/migrate/20241130095753_devise_create_users.rb
index bbe3837..efdddef 100644
--- a/db/migrate/20241130095753_devise_create_users.rb
+++ b/db/migrate/20241130095753_devise_create_users.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 class DeviseCreateUsers < ActiveRecord::Migration[8.0]
diff --git a/db/migrate/20241130182228_create_weddings.rb b/db/migrate/20241130182228_create_weddings.rb
index c8cf1fd..857b63e 100644
--- a/db/migrate/20241130182228_create_weddings.rb
+++ b/db/migrate/20241130182228_create_weddings.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class CreateWeddings < ActiveRecord::Migration[8.0]
   def change
     create_table :weddings, id: :uuid do |t|
diff --git a/db/migrate/20241130185731_add_wedding_id_to_models.rb b/db/migrate/20241130185731_add_wedding_id_to_models.rb
index 9f6d46a..85fbabf 100644
--- a/db/migrate/20241130185731_add_wedding_id_to_models.rb
+++ b/db/migrate/20241130185731_add_wedding_id_to_models.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class AddWeddingIdToModels < ActiveRecord::Migration[8.0]
   def change
     [:expenses, :guests, :seats, :tables_arrangements, :groups, :users].each do |table|
diff --git a/db/migrate/20241207112305_remove_wedding_date.rb b/db/migrate/20241207112305_remove_wedding_date.rb
index 2176f55..5b2e987 100644
--- a/db/migrate/20241207112305_remove_wedding_date.rb
+++ b/db/migrate/20241207112305_remove_wedding_date.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class RemoveWeddingDate < ActiveRecord::Migration[8.0]
   def change
     remove_column :weddings, :date, :date, null: false
diff --git a/db/migrate/20241208102932_allow_ungrouped_guests.rb b/db/migrate/20241208102932_allow_ungrouped_guests.rb
index e4bb19a..572a871 100644
--- a/db/migrate/20241208102932_allow_ungrouped_guests.rb
+++ b/db/migrate/20241208102932_allow_ungrouped_guests.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class AllowUngroupedGuests < ActiveRecord::Migration[8.0]
   def change
     change_column_null :guests, :group_id, true
diff --git a/db/migrate/20241216231415_create_group_affinities.rb b/db/migrate/20241216231415_create_group_affinities.rb
index 1c6789d..22f86c5 100644
--- a/db/migrate/20241216231415_create_group_affinities.rb
+++ b/db/migrate/20241216231415_create_group_affinities.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 class CreateGroupAffinities < ActiveRecord::Migration[8.0]
   disable_ddl_transaction!
 
diff --git a/db/queue_schema.rb b/db/queue_schema.rb
index 0cc657e..41a41b0 100644
--- a/db/queue_schema.rb
+++ b/db/queue_schema.rb
@@ -1,2 +1,4 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 ActiveRecord::Schema[7.1].define(version: 1) do
   end
diff --git a/db/schema.rb b/db/schema.rb
index 5e4178c..11aa68c 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # This file is auto-generated from the current state of the database. Instead
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
diff --git a/db/seeds.rb b/db/seeds.rb
index b0e69c5..fcf5ec3 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 NUMBER_OF_GUESTS = 50
 
 ActsAsTenant.without_tenant do
diff --git a/spec/extensions/tree_spec.rb b/spec/extensions/tree_spec.rb
index 56de6f0..4b45e26 100644
--- a/spec/extensions/tree_spec.rb
+++ b/spec/extensions/tree_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/factories/expense.rb b/spec/factories/expense.rb
index 5624496..cec5134 100644
--- a/spec/factories/expense.rb
+++ b/spec/factories/expense.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 FactoryBot.define do
diff --git a/spec/factories/group_affinities.rb b/spec/factories/group_affinities.rb
index 10a8d84..be308bd 100644
--- a/spec/factories/group_affinities.rb
+++ b/spec/factories/group_affinities.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 FactoryBot.define do
diff --git a/spec/factories/groups.rb b/spec/factories/groups.rb
index 1949d65..0cd9c48 100644
--- a/spec/factories/groups.rb
+++ b/spec/factories/groups.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 FactoryBot.define do
diff --git a/spec/factories/guest.rb b/spec/factories/guest.rb
index 4f1f4f9..9efecdb 100644
--- a/spec/factories/guest.rb
+++ b/spec/factories/guest.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 FactoryBot.define do
diff --git a/spec/factories/table_arrangement.rb b/spec/factories/table_arrangement.rb
index e1eedad..e0c9cbb 100644
--- a/spec/factories/table_arrangement.rb
+++ b/spec/factories/table_arrangement.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 FactoryBot.define do
diff --git a/spec/factories/users.rb b/spec/factories/users.rb
index bbc1dd0..edae51d 100644
--- a/spec/factories/users.rb
+++ b/spec/factories/users.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 FactoryBot.define do
diff --git a/spec/factories/weddings.rb b/spec/factories/weddings.rb
index 3a2ff4c..8fa5a9c 100644
--- a/spec/factories/weddings.rb
+++ b/spec/factories/weddings.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 FactoryBot.define do
diff --git a/spec/models/expense_spec.rb b/spec/models/expense_spec.rb
index 6c1797a..9a9a025 100644
--- a/spec/models/expense_spec.rb
+++ b/spec/models/expense_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/models/group_affinity_spec.rb b/spec/models/group_affinity_spec.rb
index 00f053c..8afd2c6 100644
--- a/spec/models/group_affinity_spec.rb
+++ b/spec/models/group_affinity_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/models/group_spec.rb b/spec/models/group_spec.rb
index 2b466dd..c55b081 100644
--- a/spec/models/group_spec.rb
+++ b/spec/models/group_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/models/guest_spec.rb b/spec/models/guest_spec.rb
index 5db5f05..e1f7ad6 100644
--- a/spec/models/guest_spec.rb
+++ b/spec/models/guest_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/models/seat_spec.rb b/spec/models/seat_spec.rb
index 44f157b..5648c2e 100644
--- a/spec/models/seat_spec.rb
+++ b/spec/models/seat_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/models/tables_arrangement_spec.rb b/spec/models/tables_arrangement_spec.rb
index a182e9e..96ff744 100644
--- a/spec/models/tables_arrangement_spec.rb
+++ b/spec/models/tables_arrangement_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 2140e5b..f066e79 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/models/wedding_spec.rb b/spec/models/wedding_spec.rb
index e5b224e..77fae82 100644
--- a/spec/models/wedding_spec.rb
+++ b/spec/models/wedding_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/queries/expenses/total_query_spec.rb b/spec/queries/expenses/total_query_spec.rb
index 46b09d2..f1c2c4f 100644
--- a/spec/queries/expenses/total_query_spec.rb
+++ b/spec/queries/expenses/total_query_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/queries/groups/summary_query_spec.rb b/spec/queries/groups/summary_query_spec.rb
index 5c3fccd..6300724 100644
--- a/spec/queries/groups/summary_query_spec.rb
+++ b/spec/queries/groups/summary_query_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index f5ed83c..faf5740 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # This file is copied to spec/ when you run 'rails generate rspec:install'
diff --git a/spec/requests/affinities_spec.rb b/spec/requests/affinities_spec.rb
index 4a23a8b..9f85d33 100644
--- a/spec/requests/affinities_spec.rb
+++ b/spec/requests/affinities_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'swagger_helper'
diff --git a/spec/requests/captcha_spec.rb b/spec/requests/captcha_spec.rb
index 738f391..e3f49cf 100644
--- a/spec/requests/captcha_spec.rb
+++ b/spec/requests/captcha_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'swagger_helper'
diff --git a/spec/requests/expenses_spec.rb b/spec/requests/expenses_spec.rb
index a912891..1f064d6 100644
--- a/spec/requests/expenses_spec.rb
+++ b/spec/requests/expenses_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'swagger_helper'
diff --git a/spec/requests/groups_spec.rb b/spec/requests/groups_spec.rb
index c06ed89..2e9d5ac 100644
--- a/spec/requests/groups_spec.rb
+++ b/spec/requests/groups_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'swagger_helper'
diff --git a/spec/requests/guests_spec.rb b/spec/requests/guests_spec.rb
index 6f588f4..0ecd72f 100644
--- a/spec/requests/guests_spec.rb
+++ b/spec/requests/guests_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'swagger_helper'
diff --git a/spec/requests/schemas.rb b/spec/requests/schemas.rb
index aa9d4e0..549834e 100644
--- a/spec/requests/schemas.rb
+++ b/spec/requests/schemas.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module Swagger
diff --git a/spec/requests/summary_spec.rb b/spec/requests/summary_spec.rb
index 57417a7..d6a1f85 100644
--- a/spec/requests/summary_spec.rb
+++ b/spec/requests/summary_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'swagger_helper'
diff --git a/spec/requests/tables_arrangements_spec.rb b/spec/requests/tables_arrangements_spec.rb
index d06f28d..4e87cb2 100644
--- a/spec/requests/tables_arrangements_spec.rb
+++ b/spec/requests/tables_arrangements_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'swagger_helper'
diff --git a/spec/requests/tokens_spec.rb b/spec/requests/tokens_spec.rb
index f1bcd40..a6aac2e 100644
--- a/spec/requests/tokens_spec.rb
+++ b/spec/requests/tokens_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'swagger_helper'
diff --git a/spec/requests/users/confirmations_spec.rb b/spec/requests/users/confirmations_spec.rb
index 7758fa6..492f6f3 100644
--- a/spec/requests/users/confirmations_spec.rb
+++ b/spec/requests/users/confirmations_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'swagger_helper'
diff --git a/spec/requests/users/registrations_spec.rb b/spec/requests/users/registrations_spec.rb
index 21f5f78..e55d4c8 100644
--- a/spec/requests/users/registrations_spec.rb
+++ b/spec/requests/users/registrations_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'swagger_helper'
diff --git a/spec/requests/users/sessions_spec.rb b/spec/requests/users/sessions_spec.rb
index 25fb0b7..60b49e1 100644
--- a/spec/requests/users/sessions_spec.rb
+++ b/spec/requests/users/sessions_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'swagger_helper'
diff --git a/spec/services/tables/discomfort_calculator_spec.rb b/spec/services/tables/discomfort_calculator_spec.rb
index 19f836a..4524a1c 100644
--- a/spec/services/tables/discomfort_calculator_spec.rb
+++ b/spec/services/tables/discomfort_calculator_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/services/tables/distribution_spec.rb b/spec/services/tables/distribution_spec.rb
index f84ae03..e598a52 100644
--- a/spec/services/tables/distribution_spec.rb
+++ b/spec/services/tables/distribution_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/services/tables/shift_spec.rb b/spec/services/tables/shift_spec.rb
index 248b3a2..39e07f8 100644
--- a/spec/services/tables/shift_spec.rb
+++ b/spec/services/tables/shift_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/services/tables/swap_spec.rb b/spec/services/tables/swap_spec.rb
index 1ad8857..d8db4a7 100644
--- a/spec/services/tables/swap_spec.rb
+++ b/spec/services/tables/swap_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/services/vns/engine_spec.rb b/spec/services/vns/engine_spec.rb
index 02acb5b..73d7b82 100644
--- a/spec/services/vns/engine_spec.rb
+++ b/spec/services/vns/engine_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 409c64b..d405628 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 # This file was generated by the `rails generate rspec:install` command. Conventionally, all
diff --git a/spec/swagger_helper.rb b/spec/swagger_helper.rb
index ab24f93..5ba4cce 100644
--- a/spec/swagger_helper.rb
+++ b/spec/swagger_helper.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 require 'rails_helper'
diff --git a/spec/swagger_response_helper.rb b/spec/swagger_response_helper.rb
index 964f4a9..09df9a1 100644
--- a/spec/swagger_response_helper.rb
+++ b/spec/swagger_response_helper.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
 # frozen_string_literal: true
 
 module SwaggerResponseHelper