fix(dashboard): render disk chart; show server name as node label

- Dashboard "ТОП статистика по диску" was stuck on "Загрузка...": the
  node name in the dashboard_metrics WS payload is `name`, not `node`, so
  the RRD query stayed disabled. Use name fallback and unwrap the
  {data:[...]} response shape.
- Instances list + detail page: show the panel-side server name (from the
  add-server form) in the "Узел" column/label instead of the Proxmox node
  hostname. Real node is still used for all API calls.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/features/dashboard/DashboardPage.tsx

@@ -226,16 +226,24 @@ function ClusterNodesSection({ serverList, nodeStats }: { serverList: Rec[]; nod
     .sort((a, b) => (Number(b.disk_pct) || 0) - (Number(a.disk_pct) || 0))
     .slice(0, 5)
 
-  // Fetch RRD for each of those nodes in parallel
+  // Fetch RRD for each of those nodes in parallel.
+  // Node name comes from the `dashboard_metrics` WS payload, where the field is
+  // `name` (not `node`); fall back to `node` for the REST `resources/all` shape.
   const rrdResults = useQueries({
-    queries: chartNodes.map(n => ({
-      queryKey: ['node-rrd', Number(n.server_id) || 0, String(n.node || ''), timeframe],
+    queries: chartNodes.map(n => {
+      const nodeName = String(n.node || n.name || '')
+      return {
+        queryKey: ['node-rrd', Number(n.server_id) || 0, nodeName, timeframe],
         queryFn: () =>
-        apiClient.get<Rec[]>(
-          `/proxmox/api/${n.server_id}/node/rrddata?node=${n.node}&timeframe=${timeframe}`
-        ),
-      enabled: !!n.server_id && !!n.node,
-    })),
+          apiClient
+            .get<{ data?: Rec[] } | Rec[]>(
+              `/proxmox/api/${n.server_id}/node/rrddata?node=${encodeURIComponent(nodeName)}&timeframe=${timeframe}`
+            )
+            // Endpoint wraps the series in `{ data: [...] }`; tolerate both shapes.
+            .then(r => (Array.isArray(r) ? r : (r?.data ?? []))),
+        enabled: !!n.server_id && !!nodeName,
+      }
+    }),
   })
 
   // Align series by index (all PVE nodes produce same-length RRD arrays)

frontend/src/features/instances/InstanceDetailPage.tsx

@@ -30,6 +30,7 @@ import {
 } from '@/components/ui/dropdown-menu';
 import { StatusDot } from '@/components/shared/status-dot';
 import { useVirtualMachines, usePowerAction, useVMInterfaces } from '@/hooks/use-instances';
+import { useServers } from '@/hooks/use-nodes';
 import InstanceActionDialogs, { PowerConfirmDialog, type InstanceAction, type PowerAction } from './InstanceActionDialogs';
 import { vmTypeLabel } from '@/lib/format';
 import { toast } from 'sonner';
@@ -57,6 +58,12 @@ export default function InstanceDetailPage() {
   const { data: allVMs, isLoading } = useVirtualMachines();
   const vm = allVMs?.find((v) => v.server_id === sid && v.vmid === vid);
 
+  // Show the panel-side server name (from the add-server form) instead of the
+  // Proxmox node hostname, matching the instances list. `node` is still used for
+  // all API calls below — only the displayed label changes.
+  const { data: servers = [] } = useServers();
+  const nodeLabel = servers.find((s) => s.id === sid)?.name || node;
+
   const power = usePowerAction(sid, vid, type, node);
   const isRunning = vm?.status === 'running';
 
@@ -131,7 +138,7 @@ export default function InstanceDetailPage() {
                   <StatusDot status={vm?.status || 'unknown'} pulse />
                   {vm?.status || 'unknown'}
                 </span>
-                <span>Node: {node}</span>
+                <span>{t('common.node', 'Node')}: {nodeLabel}</span>
                 {displayIP && <span className="font-mono">{displayIP}</span>}
               </div>
             </div>