- Super Kart: populate missing theme image paths, increase acceleration spread,
and add a track loading panel to the editor
- Civilization: display completion notifications for spaceship parts with
direct navigation to the building city
- Profile: implement export/import via .fcg files with validation, download,
and restore flows
- UI: add multi-button modal support, improve ProfileScene layout with avatar
masking and info card, and rename Arcade category to "Video Games"
