feat(frontend): cluster management page (create / join wizard / eject)
Surface the existing backend cluster API in the UI:
- New /cluster page with topology view (clusters + standalone servers),
per-node online status, and a 2-node quorum warning.
- Create cluster dialog (node, name with Proxmox naming rules, optional
corosync link0, optional root password).
- 3-step Join wizard: pick joining + target node → pre-join-check with
backup-and-clear (prepare-join) for nodes that still hold guests →
confirm + join with the node root password.
- Eject node dialog (with SSH-fallback root password).
- hooks/use-cluster.ts: typed useClusterTopology, useCreateCluster,
usePreJoinCheck, usePrepareJoin, useJoinCluster, useEjectNode.
- Nav item + route + RU/EN i18n strings.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Dilshod Rasulov
8659ba5a92