Add TicketType model with validations and fix dropdown menu

- Create TicketType model with Party association and Ticket relationship
- Add comprehensive validations for name, description, pricing, and date ranges
- Generate migration for ticket_types table with all required fields
- Add Alpine.js import to fix dropdown menu functionality
- Update ticket model with validations for qr_code, price, and status

app/models/ticket.rb

@@ -0,0 +1,8 @@
+class Ticket < ApplicationRecord
+  # Validations
+  validates :qr_code, presence: true, uniqueness: true
+  validates :party_id, presence: true
+  validates :user_id, presence: true
+  validates :price_cents, presence: true, numericality: { greater_than: 0 }
+  validates :status, presence: true, inclusion: { in: %w[active used expired refunded] }
+end

app/models/ticket_type.rb

@@ -0,0 +1,24 @@
+class TicketType < ApplicationRecord
+  # Associations
+  belongs_to :party
+  has_many :tickets
+
+  # Validations
+  validates :name, presence: true, length: { minimum: 3, maximum: 50 }
+  validates :description, presence: true, length: { minimum: 10, maximum: 500 }
+  validates :price_cents, presence: true, numericality: { greater_than: 0 }
+  validates :quantity, presence: true, numericality: { only_integer: true, greater_than: 0 }
+  validates :party_id, presence: true
+  validates :sale_start_at, presence: true
+  validates :sale_end_at, presence: true
+  validate :sale_end_after_start
+  validates :requires_id, inclusion: { in: [true, false] }
+  validates :minimum_age, numericality: { only_integer: true, greater_than_or_equal_to: 0, less_than_or_equal_to: 120 }, allow_nil: true
+
+  private
+
+  def sale_end_after_start
+    return unless sale_start_at && sale_end_at
+    errors.add(:sale_end_at, "must be after sale start") if sale_end_at <= sale_start_at
+  end
+end