Add Vitest to web app and remove unused composer/env props

- add `vitest` to `apps/web` devDependencies and lockfile
- remove unused `envMode` prop from `BranchToolbar` usage and signature
- drop unused composer command input ref in `ChatView`
326595b148Julius Marminge committed on 3/4/2026, 2:22:29 AM· committed by Julius Marmingeparent41a8468
4 files changedLine totals unavailable