feat(discount): dedicated «مدیریت تخفیف‌ها» item in the settings menu

Add a standalone settings sidebar entry + route (/admin/discounts) rendering
DiscountsPage (DiscountTab inside SettingsLayout, doctor/clinic only), and
revert the temporary tab inside the subscription page. Cleaner, discoverable
placement.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

assets/admin/pages/DiscountsPage.tsx

@@ -0,0 +1,17 @@
+import SettingsLayout from '../components/layout/SettingsLayout';
+import DiscountTab from '../components/DiscountTab';
+
+/** مدیریت تخفیف‌ها — بخش تنظیمات برای تعریف قوانین تخفیف عمومی (owner-scoped). */
+export default function DiscountsPage() {
+  return (
+    <SettingsLayout active="discounts">
+      <div
+        style={{ background: 'var(--surface)', minWidth: 0 }}
+        className="px-4 py-4 md:px-6 md:py-6 rounded-[var(--r-lg)]"
+      >
+        <h1 className="section-title" style={{ marginBottom: 16 }}>مدیریت تخفیف‌ها</h1>
+        <DiscountTab />
+      </div>
+    </SettingsLayout>
+  );
+}

assets/admin/pages/SubscriptionPage.tsx

@@ -10,7 +10,6 @@ import { usePaymentConfig } from '../hooks/usePaymentConfig';
 import { formatRial, formatNumber } from '../lib/utils';
 import Modal from '../components/ui/Modal';
 import SettingsLayout from '../components/layout/SettingsLayout';
-import DiscountTab from '../components/DiscountTab';
 import {
   SparkleIcon, PlanCardPerson, CloseCircleFilled, GiftIcon, InfoCircleRedFilled,
 } from './subscriptionIcons';
@@ -56,7 +55,6 @@ export const planMetaOf = (name: string) => PLAN_META[name] ?? PLAN_META.free;
 
 export default function SubscriptionPage() {
   const qc = useQueryClient();
-  const [tab, setTab] = useState<'plans' | 'discounts'>('plans');
   const [purchaseTarget, setPurchaseTarget] = useState<{ period: SubscriptionPeriod; planName: string } | null>(null);
   const [selectedGateway, setSelectedGateway] = useState<string>('');
 
@@ -124,14 +122,6 @@ export default function SubscriptionPage() {
           style={{ background: 'var(--surface)', minWidth: 0 }}
           className="px-4 py-4 md:px-6 md:py-6 rounded-[var(--r-lg)]"
         >
-          <div className="seg" style={{ marginBottom: 20 }}>
-            <button className={tab === 'plans'     ? 'on' : ''} onClick={() => setTab('plans')}>اشتراک</button>
-            <button className={tab === 'discounts' ? 'on' : ''} onClick={() => setTab('discounts')}>مدیریت تخفیف‌ها</button>
-          </div>
-
-          {tab === 'discounts' ? (
-            <DiscountTab />
-          ) : (
           <div dir="ltr" style={{ width: '100%', display: 'flex', flexDirection: 'column', gap: 32, paddingTop: 8 }}>
             {/* ── Header: current plan (left) + title (right) ── */}
             <div style={{ display: 'flex', width: '100%', justifyContent: 'space-between', alignItems: 'center', gap: 16, flexWrap: 'wrap' }}>
@@ -173,7 +163,6 @@ export default function SubscriptionPage() {
               </div>
             )}
           </div>
-          )}
         </div>
       </SettingsLayout>