feat: implement dynamic event display with party images and seed data

• Files changed: app/controllers/pages_controller.rb, app/models/party.rb, app/views/pages/home.html.erb, db/migrate/20250823145902_create_parties.rb, db/schema.rb, db/seeds.rb
• Nature of changes: Added image support to parties, updated homepage to dynamically display parties, enhanced seed data with parties and ticket types, schema updates for foreign keys
• Purpose: Enable dynamic event display on homepage with real data instead of static placeholders, add image support for parties, improve database relationships
• Impact: Homepage now shows real party data from database, parties can have images, database schema improved with proper foreign keys
• Commit message: feat: implement dynamic event display with party images and seed data

app/models/party.rb

@@ -23,6 +23,7 @@ class Party < ApplicationRecord
   validates :name, presence: true, length: { minimum: 3, maximum: 100 }
   validates :description, presence: true, length: { minimum: 10, maximum: 1000 }
   validates :state, presence: true, inclusion: { in: states.keys }
+  validates :image, length: { maximum: 500 } # URL or path to image
 
   # Venue information
   validates :venue_name, presence: true, length: { maximum: 100 }