Update react_on_rails and fix headless Chrome for tests

- Update react_on_rails to latest master (revision b50a74d9)
- Fix headless Chrome by using custom :headless_chrome driver
  Capybara's built-in :selenium_chrome_headless uses old --headless flag
  Chrome 109+ requires --headless=new for proper headless operation
- Renamed driver to avoid conflicts with Capybara's built-in driver

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: justin808

spec/rails_helper.rb

@@ -68,8 +68,15 @@
   # https://relishapp.com/rspec/rspec-rails/docs
   config.infer_spec_type_from_file_location!
 
-  Capybara.default_driver = :selenium_chrome_headless
-  Capybara.javascript_driver = :selenium_chrome_headless
+  # Use custom :headless_chrome driver (not Capybara's built-in :selenium_chrome_headless)
+  # to ensure Chrome 109+ --headless=new flag is used
+  Capybara.default_driver = :headless_chrome
+  Capybara.javascript_driver = :headless_chrome
+
+  # Also configure system specs (Rails 5.1+) to use our headless driver
+  config.before(:each, type: :system) do
+    driven_by :headless_chrome
+  end
 
   puts "=" * 80
   puts "Capybara using driver: #{Capybara.javascript_driver}"

spec/support/driver_registration.rb

@@ -28,10 +28,10 @@ def self.register_selenium_firefox
   end
 
   def self.register_selenium_chrome_headless
-    # Force re-register to ensure our configuration is used
-    Capybara.drivers.delete(:selenium_chrome_headless)
-
-    Capybara.register_driver :selenium_chrome_headless do |app|
+    # Use a custom driver name to avoid conflicts with Capybara's built-in
+    # :selenium_chrome_headless which uses the old --headless flag.
+    # Chrome 109+ requires --headless=new for proper headless operation.
+    Capybara.register_driver :headless_chrome do |app|
       browser_options = ::Selenium::WebDriver::Chrome::Options.new
       browser_options.args << "--headless=new"
       browser_options.args << "--disable-gpu"
@@ -42,7 +42,7 @@ def self.register_selenium_chrome_headless
       Capybara::Selenium::Driver.new(app, browser: :chrome, options: browser_options)
     end
 
-    Capybara::Screenshot.register_driver(:selenium_chrome_headless) do |driver, path|
+    Capybara::Screenshot.register_driver(:headless_chrome) do |driver, path|
       driver.browser.save_screenshot(path)
     end
   end