feat: Implement complete event ticketing system with Stripe integration and email confirmations

- Enhanced events index page with improved visual design and better information display
- Completely redesigned event show page with modern layout, ticket selection, and checkout functionality
- Implemented Stripe payment processing for ticket purchases
- Created ticket generation system with PDF tickets and QR codes
- Added email confirmation system with ticket attachments
- Updated database configuration to use SQLite for easier development setup
- Fixed gem dependencies and resolved conflicts
- Improved error handling throughout the checkout process
- Enhanced Stimulus controller for ticket cart management
- Added proper redirect handling for successful and cancelled payments

config/initializers/stripe.rb

@@ -0,0 +1,27 @@
+Rails.application.configure do
+  # Try to get Stripe keys from environment variables first, then from credentials
+  stripe_publishable_key = ENV["STRIPE_PUBLISHABLE_KEY"]
+  stripe_secret_key = ENV["STRIPE_SECRET_KEY"]
+  stripe_webhook_secret = ENV["STRIPE_WEBHOOK_SECRET"]
+
+  # If not in environment variables, try to get from credentials
+  if Rails.application.respond_to?(:credentials) && Rails.application.credentials.respond_to?(:stripe)
+    stripe_credentials = Rails.application.credentials.stripe
+    if stripe_credentials
+      stripe_publishable_key ||= stripe_credentials[:publishable_key] if stripe_credentials.key?(:publishable_key)
+      stripe_secret_key ||= stripe_credentials[:secret_key] if stripe_credentials.key?(:secret_key)
+      stripe_webhook_secret ||= stripe_credentials[:webhook_secret] if stripe_credentials.key?(:webhook_secret)
+    end
+  end
+
+  config.stripe = {
+    publishable_key: stripe_publishable_key,
+    secret_key: stripe_secret_key,
+    signing_secret: stripe_webhook_secret
+  }
+end
+
+# Only set the API key if it exists
+if Rails.application.config.stripe[:secret_key].present?
+  Stripe.api_key = Rails.application.config.stripe[:secret_key]
+end

config/routes.rb

@@ -16,9 +16,15 @@ Rails.application.routes.draw do
   get "dashboard", to: "pages#dashboard", as: "dashboard"
 
   # Events
-  get   "events",                    to: "events#index",    as: "events"
-  get   "events/:slug.:id",          to: "events#show",     as: "event"
-  post  "events/:slug.:id/checkout", to: "events#checkout", as: "event_checkout"
+  get   "events",                      to: "events#index",           as: "events"
+  get   "events/:slug.:id",            to: "events#show",            as: "event"
+  post  "events/:slug.:id/checkout",   to: "events#checkout",        as: "event_checkout"
+
+  # Payment success
+  get   "payments/success",             to: "events#payment_success", as: "payment_success"
+
+  # Tickets
+  get   "tickets/:ticket_id/download", to: "events#download_ticket", as: "download_ticket"
 
   # Routes for devise authentication Gem
   # Bind devise to user