fix: Update views and controllers for event image display

Update all event-related view templates and controllers to properly handle and display event images throughout the application.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/controllers/api/v1/events_controller.rb

@@ -88,6 +88,7 @@ module Api
           latitude: event.latitude,
           longitude: event.longitude,
           featured: event.featured,
+          image_url: event.display_image_url,
           created_at: event.created_at,
           updated_at: event.updated_at,
           user: {