Fix Vite manifest paths in CI environment (#283)

Fix Vite manifest paths in CI environment (#283)

# Fix Vite manifest paths in CI environment

## Summary
Fix absolute paths appearing in Vite manifest.json during GitHub Actions builds by explicitly setting root and base configuration options.

## Details
- Added explicit `root: './'` to ensure consistent working directory resolution
- Added `base: './'` to force relative paths for assets
- This prevents the CI environment from generating absolute paths like `../../../../actions-runner-win-x64-2.328.0/_work/inventory-app/inventory-app/resources/css/app.css`
- Local build continues to work correctly with relative paths like `resources/css/app.css`

## Testing
- ✅ Local build generates correct relative paths
- ✅ Tests pass
- ⏳ CI environment testing pending

Fixes issue where manifest.json contained absolute paths in GitHub Actions environment while working correctly locally.

Co-authored-by: Pascal HAVELANGE <havelangep@hotmail.com>