``logout`` calls ``clearAtomStorage(systemConfigAtom)`` which sets the
atom to ``null``, and on a fresh SPA login (no full reload)
``app.tsx``'s ``fetchSystemConfig`` doesn't re-run, so consumers that
read ``systemConfig.xxx`` directly crash with "Cannot read properties
of null". A hard refresh masks the bug. Add optional chaining at the
read sites (grafana url / dashboard uids, showMonitoring) so the
contract stays robust regardless of how the atom is reset.
The "chore: hide cluster detail" change had commented out both the
cluster-detail route and the cluster name link in the list. The
detail page component still ships in the OSS tree, so reach is
restored but the link is plugin-gated rather than unconditional:
plain OSS renders the name as a span; with a registered
`clusterDetail.linkableName` flag the name turns into a
`Typography.Link` that fires the parent's existing `onCellClick`
(which navigates to the detail route).
Detail tabs adjustments for the in-cluster context:
- Drop the Deployments tab (deployments are managed from the
top-level Models page; the detail view is scoped to a single
cluster's hardware).
- `WorkerList` and `GPUList` accept an optional `clusterId`. When
set, the list pins `cluster_id` in its query and hides the
cluster-filter dropdown so the user can't scope away from the
cluster they're inside.
`clusterDetail.extraTabs(clusterId, intl)` exposes a plugin slot
that appends additional tab items — used by the enterprise plugin
to inject per-cluster Access / Quotas surfaces. No-op without a
plugin.
