feat: Implement complete ticket purchasing flow with new TicketsController

- Create new TicketsController with actions for name collection, creation, and checkout
- Add dedicated ticket views (new.html.erb, checkout.html.erb, show.html.erb)
- Update ticket_selection_controller.js to handle form submission via AJAX
- Add store_cart endpoint in EventsController for session-based cart management
- Update routes to support new ticket flow: /tickets/new, /create, /checkout
- Fix attribute name consistency across views (title→name, starts_at→start_time)
- Add Stripe checkout integration with proper error handling
- Remove deprecated collect_names flow in favor of streamlined approach

The flow is now: Event selection → AJAX cart storage → Name collection → Checkout → Payment

bin/test_stripe_check.rb

@@ -0,0 +1,18 @@
+#!/usr/bin/env ruby
+
+# Test to simulate the exact check that's happening in the EventsController
+puts "Testing the exact Stripe configuration check from EventsController..."
+
+# Simulate the exact check
+stripe_configured = Rails.application.config.stripe[:secret_key].present?
+puts "Direct check result: #{stripe_configured}"
+
+# Check the actual value
+puts "Secret key value: #{Rails.application.config.stripe[:secret_key]}"
+
+# Check if it's nil or empty
+puts "Secret key is nil?: #{Rails.application.config.stripe[:secret_key].nil?}"
+puts "Secret key is empty?: #{Rails.application.config.stripe[:secret_key].empty?}"
+
+# Check the type
+puts "Secret key class: #{Rails.application.config.stripe[:secret_key].class}"