diff --git a/app/api/admin/credit-costs/[operation]/route.js b/app/api/admin/credit-costs/[operation]/route.js
new file mode 100644
index 0000000..fff0c3b
--- /dev/null
+++ b/app/api/admin/credit-costs/[operation]/route.js
@@ -0,0 +1,17 @@
+import { NextResponse } from 'next/server';
+import { requireUser } from '@/lib/session';
+
+const ENGINE_URL    = process.env.ENGINE_URL    || 'http://127.0.0.1:3030';
+const ENGINE_SECRET = process.env.ENGINE_SECRET || '';
+
+export async function PATCH(req, { params }) {
+  const user = await requireUser();
+  if (!user?.isAdmin) return NextResponse.json({ error: 'Forbidden' }, { status: 403 });
+  const body = await req.json();
+  const res = await fetch(`${ENGINE_URL}/api/admin/credit-costs/${params.operation}`, {
+    method: 'PATCH',
+    headers: { 'Content-Type': 'application/json', 'x-internal-secret': ENGINE_SECRET, 'x-user-id': String(user.id) },
+    body: JSON.stringify(body),
+  });
+  return NextResponse.json(await res.json());
+}
diff --git a/app/api/admin/plans/[id]/route.js b/app/api/admin/plans/[id]/route.js
new file mode 100644
index 0000000..439ec01
--- /dev/null
+++ b/app/api/admin/plans/[id]/route.js
@@ -0,0 +1,17 @@
+import { NextResponse } from 'next/server';
+import { requireUser } from '@/lib/session';
+
+const ENGINE_URL    = process.env.ENGINE_URL    || 'http://127.0.0.1:3030';
+const ENGINE_SECRET = process.env.ENGINE_SECRET || '';
+
+export async function PATCH(req, { params }) {
+  const user = await requireUser();
+  if (!user?.isAdmin) return NextResponse.json({ error: 'Forbidden' }, { status: 403 });
+  const body = await req.json();
+  const res = await fetch(`${ENGINE_URL}/api/admin/plans/${params.id}`, {
+    method: 'PATCH',
+    headers: { 'Content-Type': 'application/json', 'x-internal-secret': ENGINE_SECRET, 'x-user-id': String(user.id) },
+    body: JSON.stringify(body),
+  });
+  return NextResponse.json(await res.json());
+}
diff --git a/components/AdminPanel.js b/components/AdminPanel.js
index fdeece6..e43c2a2 100644
--- a/components/AdminPanel.js
+++ b/components/AdminPanel.js
@@ -1,6 +1,6 @@
 'use client';
 import { useState } from 'react';
-import { Settings2, CreditCard, TrendingUp, Users, ChevronRight, Loader2, Eye, EyeOff, Save, RefreshCw, Check, AlertCircle, BarChart3, ArrowLeft } from 'lucide-react';
+import { Settings2, CreditCard, TrendingUp, Users, ChevronRight, Loader2, Eye, EyeOff, Save, RefreshCw, Check, AlertCircle, BarChart3, ArrowLeft, Zap } from 'lucide-react';
 import Link from 'next/link';
 import AdminBilling from './admin/AdminBilling';
 
@@ -8,9 +8,11 @@ import AdminBilling from './admin/AdminBilling';
 // Sidebar navigation
 // ──────────────────────────────────────────────────────────────
 const SECTIONS = [
-  { id: 'settings', label: 'Настройки API',  icon: Settings2,  desc: 'AI-провайдеры, поиск фото' },
+  { id: 'settings', label: 'AI-провайдеры', icon: Settings2,  desc: 'Ключи aiprimetech и routerai' },
+  { id: 'engine',   label: 'Движок',         icon: Zap,         desc: 'URL, Telegram, авто-черновики' },
   { id: 'payments', label: 'ЮKassa',          icon: CreditCard, desc: 'Ключи для приёма оплат' },
   { id: 'spending', label: 'Расходы AI',       icon: TrendingUp, desc: 'aiprimetech + routerai' },
+  { id: 'plans',    label: 'Тарифы',           icon: BarChart3,  desc: 'Планы, кредиты, операции' },
   { id: 'billing',  label: 'Пользователи',     icon: Users,      desc: 'Балансы и кредиты' },
 ];
 
@@ -55,8 +57,10 @@ export default function AdminPanel({ initialSection = 'settings' }) {
         {/* Content */}
         <div className="flex-1 min-w-0">
           {section === 'settings' && <SettingsSection categories={['ai_providers', 'photo_search']} />}
+          {section === 'engine'   && <SettingsSection categories={['engine']} />}
           {section === 'payments' && <SettingsSection categories={['payments']} />}
           {section === 'spending' && <SpendingSection />}
+          {section === 'plans'    && <PlansSection />}
           {section === 'billing'  && <AdminBilling />}
         </div>
       </div>
@@ -336,3 +340,130 @@ function SpendingSection() {
     </div>
   );
 }
+
+// ──────────────────────────────────────────────────────────────
+// Plans & Credits section
+// ──────────────────────────────────────────────────────────────
+function PlansSection() {
+  const [plans,   setPlans]   = useState([]);
+  const [costs,   setCosts]   = useState([]);
+  const [loading, setLoading] = useState(true);
+  const [saving,  setSaving]  = useState({});
+  const [msg,     setMsg]     = useState('');
+
+  async function load() {
+    setLoading(true);
+    try {
+      const res = await fetch('/api/billing/plans').then(r => r.json());
+      setPlans(res.plans || []);
+      setCosts(res.costs || []);
+    } catch {}
+    setLoading(false);
+  }
+
+  async function savePlan(plan) {
+    setSaving(s => ({ ...s, [plan.id]: true }));
+    try {
+      await fetch(`/api/admin/plans/${plan.id}`, {
+        method: 'PATCH',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ price_rub: plan.price_rub, credits_month: plan.credits_month, channels_max: plan.channels_max }),
+      });
+      setMsg('Сохранено ✓');
+      setTimeout(() => setMsg(''), 2000);
+    } catch {}
+    setSaving(s => ({ ...s, [plan.id]: false }));
+  }
+
+  async function saveCost(cost) {
+    setSaving(s => ({ ...s, [`cost_${cost.operation}`]: true }));
+    try {
+      await fetch(`/api/admin/credit-costs/${cost.operation}`, {
+        method: 'PATCH',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ credits: cost.credits }),
+      });
+      setMsg('Сохранено ✓');
+      setTimeout(() => setMsg(''), 2000);
+    } catch {}
+    setSaving(s => ({ ...s, [`cost_${cost.operation}`]: false }));
+  }
+
+  if (loading && !plans.length) { load(); }
+
+  const PLAN_LABELS = { free: 'Free', starter: 'Starter', pro: 'Pro', business: 'Business' };
+
+  return (
+    <div className="space-y-6">
+      {msg && <div className="text-sm text-green-400 flex items-center gap-1"><Check className="w-4 h-4" />{msg}</div>}
+
+      {/* Тарифные планы */}
+      <section className="card p-5">
+        <h2 className="font-semibold mb-1">Тарифные планы</h2>
+        <p className="text-xs text-gray-500 mb-4">Цены и лимиты. -1 = безлимит.</p>
+        {loading ? <Loader2 className="w-4 h-4 animate-spin" /> : (
+          <div className="space-y-3">
+            {plans.map(plan => {
+              const [p, setP] = [plan, (updates) => setPlans(pp => pp.map(x => x.id === plan.id ? { ...x, ...updates } : x))];
+              return (
+                <div key={p.id} className="flex items-center gap-3 p-3 rounded-lg bg-surface2">
+                  <div className="w-20 font-medium text-sm">{PLAN_LABELS[p.code] || p.code}</div>
+                  <div className="flex items-center gap-1">
+                    <span className="text-xs text-gray-500">₽/мес:</span>
+                    <input type="number" value={p.price_rub} onChange={e => setP({ price_rub: +e.target.value })}
+                      className="input w-20 text-sm py-1" />
+                  </div>
+                  <div className="flex items-center gap-1">
+                    <span className="text-xs text-gray-500">кредитов:</span>
+                    <input type="number" value={p.credits_month} onChange={e => setP({ credits_month: +e.target.value })}
+                      className="input w-20 text-sm py-1" />
+                  </div>
+                  <div className="flex items-center gap-1">
+                    <span className="text-xs text-gray-500">каналов:</span>
+                    <input type="number" value={p.channels_max} onChange={e => setP({ channels_max: +e.target.value })}
+                      className="input w-16 text-sm py-1" />
+                  </div>
+                  <button onClick={() => savePlan(p)} disabled={saving[p.id]}
+                    className="btn-primary text-xs px-2.5 py-1.5 ml-auto flex items-center gap-1">
+                    {saving[p.id] ? <Loader2 className="w-3 h-3 animate-spin" /> : <Save className="w-3 h-3" />}
+                    Сохранить
+                  </button>
+                </div>
+              );
+            })}
+          </div>
+        )}
+      </section>
+
+      {/* Стоимость операций */}
+      <section className="card p-5">
+        <h2 className="font-semibold mb-1">Стоимость операций (кредиты)</h2>
+        <p className="text-xs text-gray-500 mb-4">Сколько кредитов списывается за каждую операцию.</p>
+        {loading ? <Loader2 className="w-4 h-4 animate-spin" /> : (
+          <div className="space-y-2">
+            {costs.map(cost => {
+              const [c, setC] = [cost, (updates) => setCosts(cc => cc.map(x => x.operation === cost.operation ? { ...x, ...updates } : x))];
+              const icons = { image: '🖼', text_post: '✍️', article: '📝', autopublish: '📤' };
+              return (
+                <div key={c.operation} className="flex items-center gap-3 p-3 rounded-lg bg-surface2">
+                  <span className="text-lg w-7 text-center">{icons[c.operation] || '⚙️'}</span>
+                  <div className="flex-1 text-sm">{c.description || c.operation}</div>
+                  <div className="flex items-center gap-2">
+                    <input type="number" value={c.credits} onChange={e => setC({ credits: +e.target.value })}
+                      className="input w-16 text-sm py-1 text-center" min={0} />
+                    <span className="text-xs text-gray-500">кр</span>
+                  </div>
+                  <button onClick={() => saveCost(c)} disabled={saving[`cost_${c.operation}`]}
+                    className="btn-primary text-xs px-2.5 py-1.5 flex items-center gap-1">
+                    {saving[`cost_${c.operation}`] ? <Loader2 className="w-3 h-3 animate-spin" /> : <Save className="w-3 h-3" />}
+                    Сохранить
+                  </button>
+                </div>
+              );
+            })}
+          </div>
+        )}
+      </section>
+    </div>
+  );
+}
diff --git a/components/Header.js b/components/Header.js
index 24fba4c..c43411f 100644
--- a/components/Header.js
+++ b/components/Header.js
@@ -2,7 +2,7 @@
 import Link from 'next/link';
 import { useRouter } from 'next/navigation';
 import { useEffect, useState } from 'react';
-import { Sparkles, LogOut, Settings2, CalendarDays, Coins, FileText } from 'lucide-react';
+import { Sparkles, LogOut, CalendarDays, Coins, FileText } from 'lucide-react';
 import ThemeToggle from './ThemeToggle';
 
 export default function Header({ user }) {
@@ -53,12 +53,6 @@ export default function Header({ user }) {
               <span>{credits} кр</span>
             </Link>
           )}
-          {user?.isAdmin && (
-            <Link href="/system" className="btn-ghost p-2 text-sm hidden sm:inline-flex" title="Системные настройки">
-              <Settings2 className="w-4 h-4" />
-              <span className="hidden md:inline">Система</span>
-            </Link>
-          )}
           <span className="text-sm text-gray-500 hidden sm:inline mr-2">{user?.email}</span>
           <ThemeToggle />
           <button onClick={logout} className="btn-ghost p-2" title="Выйти">