- Create companion/characters.ts with 4 companion definitions (fee, einhorn, fuchs, eule)
- Create app.ts with showScreen, getDB, initApp (routes to welcome or forest)
- Update main.ts to call initApp on DOMContentLoaded
- Add stub ui/screens.ts for initWelcomeScreen
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>