- Add config/package.json so `npm ci` installs into config/node_modules
as intended by the build scripts (./config/node_modules/...) and
vite.config.ts aliases, instead of hoisting to the repo root.
- Remove stale root package-lock.json; the root is never an npm install
target (scripts run from root but resolve modules from config/).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>