## Backend Implementation

Enhanced TicketType model with helper methods and better validations

So the full context is:

## Backend Implementation
- Enhanced TicketType model with helper methods and better validations
- New Promoter::TicketTypesController with full authorization
- Sales status tracking (draft, available, upcoming, expired, sold_out)
- New Promoter::TicketTypesController with full authorization
- Safe calculation methods preventing nil value errors
- Sales status tracking (draft, available, upcoming, expired, sold_out)

## Frontend Features
- Modern responsive UI with Tailwind CSS styling
- Interactive forms with Stimulus controller for dynamic calculations
- Revenue calculators showing potential, current, and remaining revenue
- Status indicators with appropriate colors and icons
- Buyer analytics and purchase history display

## JavaScript Enhancements
- New TicketTypeFormController for dynamic pricing calculations
- Real-time total updates as users type price/quantity
- Proper French currency formatting
- Form validation for minimum quantities based on existing sales

## Bug Fixes
 Fixed nil value errors in price_euros method when price_cents is nil
 Added defensive programming for all calculation methods
 Graceful handling of incomplete ticket types during creation
 Proper default values for new ticket type instances

## Files Added/Modified
- app/controllers/promoter/ticket_types_controller.rb (new)
- app/javascript/controllers/ticket_type_form_controller.js (new)
- app/views/promoter/ticket_types/*.html.erb (4 new view files)
- app/models/ticket_type.rb (enhanced with helper methods)
- config/routes.rb (added nested ticket_types routes)
- db/migrate/*_add_requires_id_to_ticket_types.rb (new migration)

## Integration
- Seamless integration with existing event management system
- Updated promoter event show page with ticket management link
- Proper scoping ensuring promoters only manage their own tickets
- Compatible with existing ticket purchasing and checkout flow

db/migrate/20250831184955_add_requires_id_to_ticket_types.rb

@@ -0,0 +1,5 @@
+class AddRequiresIdToTicketTypes < ActiveRecord::Migration[8.0]
+  def change
+    add_column :ticket_types, :requires_id, :boolean, default: false, null: false
+  end
+end