Fix locales breaking in development (#4521)

app/controllers/api/v1/locales_controller.rb

@@ -31,6 +31,9 @@ module Api
       def show
         language = params[:name].tr('-', '_')
 
+        # Serve locales files directly in development (not through asset pipeline)
+        return render file: Rails.root.join('app', 'assets', 'locales', "#{language}.json") if Rails.env.development?
+
         redirect_to ActionController::Base.helpers.asset_path("#{language}.json")
       rescue StandardError
         head :not_acceptable