- Add Vite resolve.alias for react/react-dom to root node_modules
- Removes duplicate React instances from pnpm transitive deps
- Create E2E smoke test verifying no React hook errors
- Fix: pnpm resolves @dnd-kit deps to react@19.2.8, conflicting with
app react@19.2.3 causing 'Invalid hook call' at runtime
Fixes: dark screen / Invalid hook call on /app