add manage subroute to host users, auth, email pages

packages/builder/src/pages/portal/_layout.svelte

@@ -25,10 +25,10 @@
   let menu = [
     { title: "Apps", href: "/portal/" },
     { title: "Drafts", href: "/portal/drafts" },
-    { title: "Users", href: "/portal/users", heading: "Manage" },
-    { title: "Groups", href: "/portal/groups" },
-    { title: "Auth", href: "/portal/oauth" },
-    { title: "Email", href: "/portal/email" },
+    { title: "Users", href: "/portal/manage/users", heading: "Manage" },
+    { title: "Groups", href: "/portal/manage/groups" },
+    { title: "Auth", href: "/portal/manage/auth" },
+    { title: "Email", href: "/portal/manage/email" },
     { title: "General", href: "/portal/settings/general", heading: "Settings" },
     { title: "Theming", href: "/portal/theming" },
     { title: "Account", href: "/portal/account" },