Replaces HomeNav with a new SiteNav and associated CSS module, updating navigation structure and user menu. Removes legacy API client, downloader, user model, and UserContext in favor of a new AuthContext stub for future authentication logic. Also cleans up HeroCarousel and minor CSS fixes.
Introduces .dockerignore, production Dockerfile and nginx config for frontend, and refactors docker-compose.yml for multi-service deployment. Updates backend and frontend code to support public API tagging, improves refund handling, adds test email endpoint, and migrates Orval config to TypeScript. Removes unused frontend Dockerfile and updates dependencies for React Query and Orval.
Introduces a new /api/choices/ endpoint for fetching model choices with multilingual labels. Updates Django models to use 'cz#' prefix for Czech labels. Adds OpenAPI client generation via orval, refactors frontend API structure, and provides documentation and helper scripts for dynamic choices and OpenAPI usage.
