将原先依赖 jsdelivr CDN 的 7 个前端库全部下载到 web/static/vendor/ 并改成本地引用，内网/离线部署不再因外网不可达导致 JS 加载不全。
All seven frontend libraries that previously loaded from the jsdelivr CDN were vendored under web/static/vendor/ and wired to local paths, so intranet/offline deployments no longer break when external CDNs are unreachable.