Add beta request nav toggle

frontend/app/admin/SettingsPage.tsx

@@ -50,6 +50,7 @@ const BOOL_SETTINGS = new Set([
   'site_login_show_local_login',
   'site_login_show_forgot_password',
   'site_login_show_signup_link',
+  'site_nav_show_requests',
   'magent_proxy_enabled',
   'magent_proxy_trust_forwarded_headers',
   'magent_ssl_bind_enabled',
@@ -272,6 +273,12 @@ const SITE_SECTION_GROUPS: Array<{
       'site_login_show_signup_link',
     ],
   },
+  {
+    key: 'site-navigation',
+    title: 'Beta Navigation',
+    description: 'Temporarily show or hide beta navigation entries while new request pipelines are built.',
+    keys: ['site_nav_show_requests'],
+  },
 ]
 
 const SETTING_LABEL_OVERRIDES: Record<string, string> = {
@@ -319,6 +326,7 @@ const SETTING_LABEL_OVERRIDES: Record<string, string> = {
   site_login_show_local_login: 'Login page: local Magent sign-in',
   site_login_show_forgot_password: 'Login page: forgot password',
   site_login_show_signup_link: 'Login page: invite signup link',
+  site_nav_show_requests: 'Top navigation: Requests',
   log_file_max_bytes: 'Log file max size (bytes)',
   log_file_backup_count: 'Rotated log files to keep',
   log_http_client_level: 'Service HTTP log level',
@@ -349,6 +357,7 @@ const labelFromKey = (key: string) =>
     .replace('site banner enabled', 'Sitewide banner enabled')
     .replace('site banner message', 'Sitewide banner message')
     .replace('site banner tone', 'Sitewide banner tone')
+    .replace('site nav show requests', 'Top navigation: Requests')
     .replace('site changelog', 'Changelog text')
 
 const formatBytes = (value?: number | null) => {
@@ -645,6 +654,7 @@ export default function SettingsPage({ section }: SettingsPageProps) {
     'site_login_show_local_login',
     'site_login_show_forgot_password',
     'site_login_show_signup_link',
+    'site_nav_show_requests',
   ]
   const sortByOrder = (items: AdminSetting[], order: string[]) => {
     const position = new Map(order.map((key, index) => [key, index]))
@@ -853,6 +863,8 @@ export default function SettingsPage({ section }: SettingsPageProps) {
     site_login_show_local_login: 'Show the local Magent login button on the login page.',
     site_login_show_forgot_password: 'Show the forgot-password link on the login page.',
     site_login_show_signup_link: 'Show the invite signup link on the login page.',
+    site_nav_show_requests:
+      'Show the Requests item in the top navigation. Disable during beta while request routing is being reworked.',
     site_changelog: 'One update per line for the public changelog.',
   }