fix(admin): sticky top-0 вместо top-6 — заголовок выше

frontend/src/app/admin/page.tsx

@@ -106,7 +106,7 @@ export default function AdminModerationPage() {
   return (
     <>
       <div className="mx-auto max-w-3xl px-4 pb-8">
-        <div className="sticky top-6 z-10 -mx-4 mb-6 bg-[#0f172a] px-4 pb-3 pt-3">
+        <div className="sticky top-0 z-10 -mx-4 mb-6 bg-[#0f172a] px-4 pb-3 pt-3">
           <h1 className="mb-4 text-2xl font-bold text-white">Модерация</h1>
 
           {actionMsg && (

frontend/src/app/admin/users/page.tsx

@@ -119,7 +119,7 @@ export default function AdminUsersPage() {
   return (
     <>
       <div className="mx-auto max-w-3xl px-4 pb-8">
-        <div className="sticky top-6 z-10 -mx-4 mb-6 bg-[#0f172a] px-4 pb-3">
+        <div className="sticky top-0 z-10 -mx-4 mb-6 bg-[#0f172a] px-4 pb-3">
           <div className="flex items-center justify-between pt-3">
             <h1 className="text-2xl font-bold text-white">Управление пользователями</h1>
             <button onClick={() => setShowCreate(true)}