fix(Settings): hide AI Assistant from navigation until installed

admin/docs/release-notes.md

@@ -1,5 +1,17 @@
 # Release Notes
 
+## Unreleased
+
+### Features
+- **AI Assistant**: Added improved user guidance for troubleshooting GPU pass-through issues
+- **Settings**: Nomad now automatically performs nightly checks for available app updates, and users can select and apply updates from the Apps page in Settings
+
+### Bug Fixes
+- **Settings**: Fixed an issue where the AI Assistant settings page would be shown in navigation even if the AI Assistant was not installed, thus causing 404 errors when clicked
+- **Security**: Path traversal and SSRF mitigations
+
+### Improvements
+
 ## Version 1.28.0 - March 5, 2026
 
 ### Features

admin/inertia/layouts/SettingsLayout.tsx

@@ -13,12 +13,15 @@ import {
 import { usePage } from '@inertiajs/react'
 import StyledSidebar from '~/components/StyledSidebar'
 import { getServiceLink } from '~/lib/navigation'
+import useServiceInstalledStatus from '~/hooks/useServiceInstalledStatus'
+import { SERVICE_NAMES } from '../../constants/service_names'
 
 export default function SettingsLayout({ children }: { children: React.ReactNode }) {
   const { aiAssistantName } = usePage<{ aiAssistantName: string }>().props
+  const aiAssistantInstallStatus = useServiceInstalledStatus(SERVICE_NAMES.OLLAMA)
 
   const navigation = [
-    { name: aiAssistantName, href: '/settings/models', icon: IconWand, current: false },
+    ...(aiAssistantInstallStatus.isInstalled ? [{ name: aiAssistantName, href: '/settings/models', icon: IconWand, current: false }] : []),
     { name: 'Apps', href: '/settings/apps', icon: IconTerminal2, current: false },
     { name: 'Benchmark', href: '/settings/benchmark', icon: IconChartBar, current: false },
     { name: 'Content Explorer', href: '/settings/zim/remote-explorer', icon: IconZoom, current: false },