Reapply "Add missing admin action files and navigation links"

This reverts commit 4d515bc400.

src/app/admin/translations/layout.tsx

@@ -0,0 +1,17 @@
+import { redirect } from 'next/navigation'
+import { canAccess, getAdminContext, PERMS } from '@/lib/permissions'
+import { TranslationsTabs } from './translations-tabs'
+
+export default async function TranslationsLayout({ children }: { children: React.ReactNode }) {
+  const { session, permissions } = await getAdminContext()
+  if (!canAccess(permissions, PERMS.SETTINGS_VIEW, session.user.rank)) {
+    redirect('/admin')
+  }
+
+  return (
+    <div className="space-y-6">
+      <TranslationsTabs />
+      {children}
+    </div>
+  )
+}