diff --git a/.downstream/native-domains.md b/.downstream/native-domains.md
index 95ad9c42a480..50ec349c4738 100644
--- a/.downstream/native-domains.md
+++ b/.downstream/native-domains.md
@@ -19,7 +19,8 @@ nothing. While no Codex runtime row is stored,
 
 ## Codex gateway borrowing
 
-The Extensions navigation exposes three administrator pages: settings at
+The Extensions sidebar has one Codex Borrowing entry. Its in-page navigation
+switches between three independently addressable administrator pages: settings at
 `/admin/codex-gateway-borrow`, route status at
 `/admin/codex-gateway-borrow/status`, and manual comparison/history at
 `/admin/codex-pelican-comparison`. Opening or navigating these pages only reads
diff --git a/frontend/src/components/layout/AppSidebar.vue b/frontend/src/components/layout/AppSidebar.vue
index c650b5e59845..67f86aea5eed 100644
--- a/frontend/src/components/layout/AppSidebar.vue
+++ b/frontend/src/components/layout/AppSidebar.vue
@@ -113,7 +113,7 @@
             :key="item.path"
             :to="item.path"
             class="sidebar-link mb-1"
-            :class="{ 'sidebar-link-active': route.path === item.path, 'sidebar-link-collapsed': sidebarCollapsed }"
+            :class="{ 'sidebar-link-active': isExtensionActive(item.path), 'sidebar-link-collapsed': sidebarCollapsed }"
             :title="sidebarCollapsed ? item.label : undefined"
             @click="handleMenuItemClick(item.path)"
           >
@@ -507,14 +507,6 @@ const GatewayBorrowIcon = {
   render: () => h(Icon, { name: 'link', 'aria-hidden': 'true' })
 }
 
-const GatewayBorrowStatusIcon = {
-  render: () => h(Icon, { name: 'checkCircle', 'aria-hidden': 'true' })
-}
-
-const PelicanComparisonIcon = {
-  render: () => h(Icon, { name: 'grid', 'aria-hidden': 'true' })
-}
-
 const BellIcon = {
   render: () =>
     h(
@@ -842,8 +834,6 @@ const adminExtensionNavItems = computed((): NavItem[] => [
   { path: '/admin/system-prompts', label: t('nav.systemPrompts'), icon: DocumentIcon },
   { path: '/admin/codex-runtime', label: t('nav.codexRuntime'), icon: PluginIcon },
   { path: '/admin/codex-gateway-borrow', label: t('nav.codexGatewayBorrow'), icon: GatewayBorrowIcon },
-  { path: '/admin/codex-gateway-borrow/status', label: t('nav.codexGatewayBorrowStatus'), icon: GatewayBorrowStatusIcon },
-  { path: '/admin/codex-pelican-comparison', label: t('nav.codexPelicanComparison'), icon: PelicanComparisonIcon },
   { path: '/admin/reasoning-recovery', label: t('nav.reasoningRecovery'), icon: RecoveryIcon },
 ])
 
@@ -986,6 +976,13 @@ function isActive(path: string): boolean {
   return route.path === path || route.path.startsWith(path + '/')
 }
 
+function isExtensionActive(path: string): boolean {
+  if (path === '/admin/codex-gateway-borrow') {
+    return isActive(path) || route.path === '/admin/codex-pelican-comparison'
+  }
+  return route.path === path
+}
+
 function isGroupActive(item: NavItem): boolean {
   if (!item.children) return false
   return item.children.some(child => route.path === child.path)
diff --git a/frontend/src/components/layout/__tests__/AppSidebar.simple-mode.spec.ts b/frontend/src/components/layout/__tests__/AppSidebar.simple-mode.spec.ts
index 127b4764c7c7..7a6375022e3d 100644
--- a/frontend/src/components/layout/__tests__/AppSidebar.simple-mode.spec.ts
+++ b/frontend/src/components/layout/__tests__/AppSidebar.simple-mode.spec.ts
@@ -105,15 +105,13 @@ describe('AppSidebar simple mode extensions', () => {
     wrapper.unmount()
   })
 
-  it.each([true, false])('renders the three admin page entries in order (simple: %s)', async simple => {
+  it.each([true, false])('renders one borrowing entry with page navigation kept inside (simple: %s)', async simple => {
     const wrapper = await renderSidebar({ admin: true, simple })
 
     expect(extensionLinks(wrapper)).toEqual([
       '/admin/system-prompts',
       '/admin/codex-runtime',
       '/admin/codex-gateway-borrow',
-      '/admin/codex-gateway-borrow/status',
-      '/admin/codex-pelican-comparison',
       '/admin/reasoning-recovery',
     ])
     if (simple) expect(wrapper.text()).not.toContain('nav.myAccount')
@@ -126,12 +124,17 @@ describe('AppSidebar simple mode extensions', () => {
     regularUser.unmount()
   })
 
-  it('marks only Borrow Status active on its own route', async () => {
-    const wrapper = await renderSidebar({ admin: true, path: '/admin/codex-gateway-borrow/status' })
+  it.each([
+    '/admin/codex-gateway-borrow',
+    '/admin/codex-gateway-borrow/status',
+    '/admin/codex-pelican-comparison',
+  ])('keeps the single borrowing entry active on %s', async path => {
+    const wrapper = await renderSidebar({ admin: true, path })
     const section = wrapper.get('[data-testid="sidebar-extensions"]')
 
-    expect(section.get('a[href="/admin/codex-gateway-borrow/status"]').classes()).toContain('sidebar-link-active')
-    expect(section.get('a[href="/admin/codex-gateway-borrow"]').classes()).not.toContain('sidebar-link-active')
+    expect(section.get('a[href="/admin/codex-gateway-borrow"]').classes()).toContain('sidebar-link-active')
+    expect(section.find('a[href="/admin/codex-gateway-borrow/status"]').exists()).toBe(false)
+    expect(section.find('a[href="/admin/codex-pelican-comparison"]').exists()).toBe(false)
     expect(section.findAll('.sidebar-link-active')).toHaveLength(1)
     wrapper.unmount()
   })
diff --git a/frontend/src/i18n/locales/en/common.ts b/frontend/src/i18n/locales/en/common.ts
index a9afc27e57f8..d4150ccd2063 100644
--- a/frontend/src/i18n/locales/en/common.ts
+++ b/frontend/src/i18n/locales/en/common.ts
@@ -223,7 +223,7 @@ export default {
     auditLogs: 'Audit Logs',
     systemPrompts: 'System Prompts',
     reasoningRecovery: 'Reasoning Recovery',
-    codexGatewayBorrow: 'Codex Borrow Settings',
+    codexGatewayBorrow: 'Codex Borrowing',
     codexGatewayBorrowStatus: 'Codex Borrow Status',
     codexPelicanComparison: 'Pelican Comparison',
   },
diff --git a/frontend/src/i18n/locales/zh/common.ts b/frontend/src/i18n/locales/zh/common.ts
index bf000300ec98..74e4cdbe3503 100644
--- a/frontend/src/i18n/locales/zh/common.ts
+++ b/frontend/src/i18n/locales/zh/common.ts
@@ -223,7 +223,7 @@ export default {
     auditLogs: '操作日志',
     systemPrompts: '系统提示词',
     reasoningRecovery: '推理恢复',
-    codexGatewayBorrow: 'Codex 借用设置',
+    codexGatewayBorrow: 'Codex 借用',
     codexGatewayBorrowStatus: 'Codex 借用状态',
     codexPelicanComparison: '鹈鹕对比',
   },
diff --git a/frontend/src/router/index.ts b/frontend/src/router/index.ts
index edbedae45971..06c758ff9c71 100644
--- a/frontend/src/router/index.ts
+++ b/frontend/src/router/index.ts
@@ -547,7 +547,7 @@ const routes: RouteRecordRaw[] = [
     path: '/admin/codex-gateway-borrow',
     name: 'AdminCodexGatewayBorrow',
     component: () => import('@/views/admin/CodexGatewayBorrowView.vue'),
-    meta: { requiresAuth: true, requiresAdmin: true, title: 'Codex Borrow Settings', titleKey: 'nav.codexGatewayBorrow' }
+    meta: { requiresAuth: true, requiresAdmin: true, title: 'Codex Borrow Settings', titleKey: 'admin.codexGatewayBorrow.title' }
   },
   {
     path: '/admin/codex-gateway-borrow/status',