This cleanup addresses transition debt from the unified resources migration:
Frontend cleanup:
- Move all Resource→Legacy type conversions to useResourcesAsLegacy() hook
- Add asNodes() and asDockerHosts() adapter functions to the hook
- Simplify DockerRoute, HostsRoute, DashboardView to use the centralized hook
- Remove ~300 lines of duplicated adapter code from App.tsx
- Remove debug console.log statements from Dashboard.tsx
- Fix CPU value conversion (divide by 100) for Dashboard compatibility
Backend fixes (from previous session):
- Fix parentID format in converters (VM, Container, Storage) to match Node.ID
- Format changed from 'instance/node/nodename' to 'instance-nodename'
- Update tests to match new parentID format
This consolidates all legacy type conversion logic in one place,
making future cleanup easier when components are migrated to use
unified resources directly.