- Create EnhancedCPUBar component to show CPU usage with Load Average overlay
- Add vertical marker indicating 1-minute Load Average relative to core count
- Purple glow indicator when Load > Cores (system overload)
- Detailed tooltip showing Usage, Load, and Capacity metrics
- Full sparkline mode support for historical view
- Integrate into NodeSummaryTable for Proxmox nodes
- Integrate into DockerHostSummaryTable for Docker hosts
- Integrate into HostsOverview for standalone hosts
