- add global ToastProvider and useToast hook mounted at app root
- show success/error toasts for environment, credential, snippet, and scenario create/edit actions
- show run-started/error toasts on scenario run actions with 100ms exit animation
- lazy-load route pages and add entity-based manual chunking in Vite
- prevent environment pages from crashing when legacy records miss data
- fix sidebar toggle chevron direction and make env forms full width
- 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