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

app/helpers/stripe_helper.rb

@@ -1,26 +1,11 @@
 module StripeHelper
-  # Check if Stripe is properly configured
-  def stripe_configured?
-    Rails.application.config.stripe[:secret_key].present?
-  end
-
-  # Initialize Stripe with the configured API key
-  def initialize_stripe
-    return false unless stripe_configured?
-    
-    Stripe.api_key = Rails.application.config.stripe[:secret_key]
-    true
-  rescue => e
-    Rails.logger.error "Failed to initialize Stripe: #{e.message}"
-    false
-  end
-
   # Safely call Stripe methods with error handling
   def safe_stripe_call(&block)
-    return nil unless stripe_configured?
+    # Check if Stripe is properly configured
+    return nil unless Rails.application.config.stripe[:secret_key].present?
     
-    # Initialize Stripe if not already done
-    initialize_stripe unless Stripe.api_key.present?
+    # Stripe is now initialized at application startup
+    Rails.logger.debug "Using globally initialized Stripe"
     
     begin
       yield if block_given?

app/helpers/tickets_helper.rb

@@ -0,0 +1,2 @@
+module TicketsHelper
+end