diff --git a/frontend-modern/src/components/AI/Chat/MentionAutocomplete.tsx b/frontend-modern/src/components/AI/Chat/MentionAutocomplete.tsx
index baa720f0d..ad9db32ac 100644
--- a/frontend-modern/src/components/AI/Chat/MentionAutocomplete.tsx
+++ b/frontend-modern/src/components/AI/Chat/MentionAutocomplete.tsx
@@ -110,12 +110,20 @@ export function MentionAutocomplete(props: MentionAutocompleteProps) {
 
   // Get status color
   const getStatusColor = (status?: string) => {
-    switch (status) {
+    switch (status?.toLowerCase()) {
       case 'running':
+      case 'online':
+      case 'healthy':
+      case 'up':
         return 'bg-green-500';
       case 'stopped':
+      case 'offline':
+      case 'error':
+      case 'failed':
         return 'bg-red-500';
       case 'paused':
+      case 'degraded':
+      case 'warning':
         return 'bg-yellow-500';
       default:
         return 'bg-gray-400';
diff --git a/frontend-modern/src/components/AI/Chat/__tests__/mentionResources.test.ts b/frontend-modern/src/components/AI/Chat/__tests__/mentionResources.test.ts
index cebb4dfb2..42ab4bfcd 100644
--- a/frontend-modern/src/components/AI/Chat/__tests__/mentionResources.test.ts
+++ b/frontend-modern/src/components/AI/Chat/__tests__/mentionResources.test.ts
@@ -113,6 +113,109 @@ describe('mentionResources', () => {
     expect(nodeOrHost[0].name).toBe('pve01');
   });
 
+  it('deduplicates docker host and host agent via agentId (#1252)', () => {
+    // Docker host has agentId matching the host agent's id
+    const state = {
+      nodes: [],
+      vms: [],
+      containers: [],
+      dockerHosts: [
+        {
+          id: 'docker-host-abc',
+          agentId: 'agent-xyz',
+          hostname: 'docker01',
+          displayName: 'docker01',
+          status: 'online',
+          lastSeen: Date.now(),
+          containers: [],
+        },
+      ],
+      hosts: [
+        {
+          id: 'agent-xyz',
+          hostname: 'docker01',
+          displayName: 'docker01',
+          status: 'online',
+          lastSeen: Date.now(),
+          memory: { total: 16, used: 8, free: 8, usage: 50 },
+        },
+      ],
+    } as unknown as State;
+
+    const resources = buildMentionResources(state);
+    const hostEntries = resources.filter((r) => r.type === 'host');
+    expect(hostEntries).toHaveLength(1);
+    expect(hostEntries[0].name).toBe('docker01');
+  });
+
+  it('deduplicates VM and host agent running inside it via linkedVmId (#1252)', () => {
+    const state = {
+      nodes: [],
+      vms: [
+        {
+          id: 'pve01-100',
+          vmid: 100,
+          name: 'my-vm',
+          node: 'pve01',
+          instance: 'pve-instance-1',
+          status: 'running',
+        },
+      ],
+      containers: [],
+      dockerHosts: [],
+      hosts: [
+        {
+          id: 'agent-in-vm',
+          hostname: 'my-vm',
+          displayName: 'my-vm',
+          status: 'online',
+          lastSeen: Date.now(),
+          linkedVmId: 'pve01-100',
+          memory: { total: 8, used: 4, free: 4, usage: 50 },
+        },
+      ],
+    } as unknown as State;
+
+    const resources = buildMentionResources(state);
+    const vmOrHost = resources.filter((r) => r.type === 'vm' || r.type === 'host');
+    expect(vmOrHost).toHaveLength(1);
+    expect(vmOrHost[0].name).toBe('my-vm');
+  });
+
+  it('deduplicates LXC container and host agent running inside it via linkedContainerId (#1252)', () => {
+    const state = {
+      nodes: [],
+      vms: [],
+      containers: [
+        {
+          id: 'pve01-200',
+          vmid: 200,
+          name: 'my-ct',
+          node: 'pve01',
+          instance: 'pve-instance-1',
+          status: 'running',
+        },
+      ],
+      dockerHosts: [],
+      hosts: [
+        {
+          id: 'agent-in-ct',
+          hostname: 'my-ct',
+          displayName: 'my-ct',
+          status: 'online',
+          lastSeen: Date.now(),
+          linkedContainerId: 'pve01-200',
+          memory: { total: 4, used: 2, free: 2, usage: 50 },
+        },
+      ],
+    } as unknown as State;
+
+    const resources = buildMentionResources(state);
+    const ctOrHost = resources.filter((r) => r.type === 'container' || r.type === 'host');
+    expect(ctOrHost).toHaveLength(1);
+    expect(ctOrHost[0].name).toBe('my-ct');
+  });
+
   it('deduplicates cluster node mentions from multiple instances and keeps the healthiest status', () => {
     const state = {
       nodes: [
diff --git a/frontend-modern/src/components/AI/Chat/mentionResources.ts b/frontend-modern/src/components/AI/Chat/mentionResources.ts
index c4f0a7f06..1a0ef1ae7 100644
--- a/frontend-modern/src/components/AI/Chat/mentionResources.ts
+++ b/frontend-modern/src/components/AI/Chat/mentionResources.ts
@@ -138,7 +138,11 @@ export function buildMentionResources(state: MentionStateSubset): MentionResourc
         status: vm.status,
         node: vm.node,
       },
-      [`vm-id:${vm.node}:${vm.vmid}`],
+      [
+        `vm-id:${vm.node}:${vm.vmid}`,
+        // Register backend VM ID so host agents with linkedVmId can merge (#1252)
+        `vm-backend-id:${vm.id}`,
+      ],
     );
   }
 
@@ -153,12 +157,25 @@ export function buildMentionResources(state: MentionStateSubset): MentionResourc
         status: container.status,
         node: container.node,
       },
-      [`lxc-id:${container.node}:${container.vmid}`],
+      [
+        `lxc-id:${container.node}:${container.vmid}`,
+        // Register backend container ID so host agents with linkedContainerId can merge (#1252)
+        `lxc-backend-id:${container.id}`,
+      ],
     );
   }
 
   for (const host of state.dockerHosts || []) {
     const hostName = host.displayName || host.hostname || host.id;
+    const dockerAliases = [
+      `docker-host-id:${host.id}`,
+      `host-name:${hostName}`,
+      `host-hostname:${host.hostname}`,
+    ];
+    // Link docker host to its host agent via agentId so they merge (#1252)
+    if (host.agentId) {
+      dockerAliases.push(`agent-host-id:${host.agentId}`);
+    }
     upsertMentionResource(
       byKey,
       aliasToKey,
@@ -168,11 +185,7 @@ export function buildMentionResources(state: MentionStateSubset): MentionResourc
         type: 'host',
         status: host.status || 'online',
       },
-      [
-        `docker-host-id:${host.id}`,
-        `host-name:${hostName}`,
-        `host-hostname:${host.hostname}`,
-      ],
+      dockerAliases,
     );
 
     for (const container of host.containers || []) {
@@ -223,11 +236,16 @@ export function buildMentionResources(state: MentionStateSubset): MentionResourc
       `host-name:${hostName}`,
       `host-hostname:${host.hostname}`,
     ];
-    // If this host agent is linked to a PVE node, add the node's backend ID alias so they merge (#1252).
-    // linkedNodeId is the node's backend ID (format: "instance-nodeName").
+    // If this host agent is linked to a PVE entity, add its backend ID alias so they merge (#1252).
     if (host.linkedNodeId) {
       aliases.push(`node-backend-id:${host.linkedNodeId}`);
     }
+    if (host.linkedVmId) {
+      aliases.push(`vm-backend-id:${host.linkedVmId}`);
+    }
+    if (host.linkedContainerId) {
+      aliases.push(`lxc-backend-id:${host.linkedContainerId}`);
+    }
     upsertMentionResource(
       byKey,
       aliasToKey,