Fix GitHub Actions dependency installation

- Generated package-lock.json to ensure reproducible builds
- Restored npm cache and npm ci usage in workflow
- Fixed dependency lock file issue that was causing deployment failures

The workflow now properly caches npm dependencies and uses npm ci
for faster, more reliable installation in CI environment.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: paul