- return scenario export payloads as yaml to match existing workflows
- harden step reordering flow for drag-and-drop and one-based ui labels
- switch server container to workspace-lockfile installs and root ignore rules
- move NestJS app into server/ subdirectory
- add client/ React+TypeScript (Vite) app with Hello World
- update docker-compose to build and run both services
- add root package.json declaring npm workspaces
- update .gitignore to cover node_modules and dist at all depths