Redesign admin peering settings and catalogs

public/settings-nav.js

@@ -7,6 +7,8 @@ const SETTINGS_SECTIONS = [
   { id: 'user/notifications', group: 'User', title: 'Notifications', hint: 'Chapter alerts and your optional webhook.' },
   { id: 'user/account', group: 'User', title: 'Account', hint: 'Your account and password.' },
   { id: 'admin/scraper', group: 'Admin', title: 'Scraper', hint: 'Live activity, downloads, update checks and sources.' },
+  { id: 'admin/peering', group: 'Admin', title: 'Peering', hint: 'Pair servers and manage their permissions.', href: 'peers.html#admin' },
+  { id: 'admin/peer-catalog', group: 'Admin', title: 'Peer catalogs', hint: 'Approve titles to share and browse peer libraries.', href: 'peer-catalog.html' },
   { id: 'admin/library', group: 'Admin', title: 'Server & library', hint: 'Library location, scan status and maintenance.' },
   { id: 'admin/users', group: 'Admin', title: 'Users & access', hint: 'Manage accounts, passwords and administrators.' },
   { id: 'admin/collections', group: 'Admin', title: 'Collections & metadata', hint: 'Group manga and review their relationships.', href: 'collections.html' },