feat: frontend support for linked host agents and PVE nodes

- Added linkedHostAgentId to Node interface
- Added linkedNodeId/linkedVmId/linkedContainerId to Host interface
- Filter out linked hosts from 'Managed Agents' list (they show merged with nodes)

Next: Update Dashboard to display linked entity badges

frontend-modern/src/components/Settings/UnifiedAgents.tsx

@@ -265,10 +265,16 @@ export const UnifiedAgents: Component = () => {
             version?: string;
             lastSeen?: number;
             isLegacy?: boolean;
+            linkedNodeId?: string;
         }>();
 
-        // Process Host Agents
+        // Process Host Agents (skip those linked to PVE nodes - they're shown merged with the node)
         hosts.forEach(h => {
+            // Skip hosts that are linked to a PVE node - they'll appear in the Dashboard merged with the node
+            if (h.linkedNodeId) {
+                return;
+            }
+
             const key = h.hostname || h.id;
             unified.set(key, {
                 id: h.id,

frontend-modern/src/types/api.ts

@@ -152,6 +152,7 @@ export interface Node {
   connectionHealth: string;
   isClusterMember?: boolean; // True if part of a cluster
   clusterName?: string; // Name of cluster (empty if standalone)
+  linkedHostAgentId?: string; // ID of host agent running on this node (for merging)
 }
 
 export interface GuestNetworkInterface {
@@ -444,6 +445,10 @@ export interface Host {
   tokenRevokedAt?: number;
   tags?: string[];
   isLegacy?: boolean;
+  // Linking: When this host agent is running on a known PVE entity
+  linkedNodeId?: string; // ID of PVE node this agent is running on
+  linkedVmId?: string; // ID of VM this agent is running inside
+  linkedContainerId?: string; // ID of container this agent is running inside
 }
 
 export interface HostNetworkInterface {