SYMBOL INDEX (18 symbols across 13 files)

FILE: backend/app/channels/application_cable/channel.rb
  type ApplicationCable (line 1) | module ApplicationCable
    class Channel (line 2) | class Channel < ActionCable::Channel::Base

FILE: backend/app/channels/application_cable/connection.rb
  type ApplicationCable (line 1) | module ApplicationCable
    class Connection (line 2) | class Connection < ActionCable::Connection::Base

FILE: backend/app/controllers/application_controller.rb
  class ApplicationController (line 1) | class ApplicationController < ActionController::Base

FILE: backend/app/controllers/greetings_controller.rb
  class GreetingsController (line 1) | class GreetingsController < ApplicationController
    method hello (line 2) | def hello

FILE: backend/app/helpers/application_helper.rb
  type ApplicationHelper (line 1) | module ApplicationHelper

FILE: backend/app/jobs/application_job.rb
  class ApplicationJob (line 1) | class ApplicationJob < ActiveJob::Base

FILE: backend/app/mailers/application_mailer.rb
  class ApplicationMailer (line 1) | class ApplicationMailer < ActionMailer::Base

FILE: backend/app/models/application_record.rb
  class ApplicationRecord (line 1) | class ApplicationRecord < ActiveRecord::Base

FILE: backend/config/application.rb
  type Myapp (line 9) | module Myapp
    class Application (line 10) | class Application < Rails::Application

FILE: backend/test/application_system_test_case.rb
  class ApplicationSystemTestCase (line 3) | class ApplicationSystemTestCase < ActionDispatch::SystemTestCase

FILE: backend/test/routing/routing_test.rb
  class RoutingTest (line 1) | class RoutingTest < Minitest::Test
    method test_that_application_has_correct_routes (line 4) | def test_that_application_has_correct_routes

FILE: backend/test/test_helper.rb
  class ActiveSupport::TestCase (line 5) | class ActiveSupport::TestCase

FILE: frontend/src/App.tsx
  constant BACKEND_API_URL (line 4) | const BACKEND_API_URL = process.env.BACKEND_API_URL || 'http://backend.l...