fix(discount): move Discount Management tab to the /admin/subscription page

The discount tab was wired into AdminSubscriptionPage (route
/admin/admin-subscription, admin-only) but /admin/subscription renders the
doctor/clinic SubscriptionPage. Since discount rules are owner-scoped, add
the segmented «مدیریت تخفیف‌ها» tab there and revert AdminSubscriptionPage.

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

assets/admin/pages/AdminSubscriptionPage.tsx

@@ -13,7 +13,6 @@ import Modal from '../components/ui/Modal';
 import ConfirmDialog from '../components/ui/ConfirmDialog';
 import PageHeader from '../components/ui/PageHeader';
 import Pagination from '../components/ui/Pagination';
-import DiscountTab from '../components/DiscountTab';
 
 // ── Types ─────────────────────────────────────────────────────────────────
 
@@ -436,21 +435,19 @@ function ReportTab() {
 // ── Main ──────────────────────────────────────────────────────────────────
 
 export default function AdminSubscriptionPage() {
-  const [tab, setTab] = useState<'plans' | 'report' | 'discounts'>('plans');
+  const [tab, setTab] = useState<'plans' | 'report'>('plans');
 
   return (
     <>
-      <PageHeader title="مدیریت اشتراک‌ها" description="تعریف پلن‌ها، دوره‌ها، تخفیف‌ها و گزارش فروش" />
+      <PageHeader title="مدیریت اشتراک‌ها" description="تعریف پلن‌ها، دوره‌ها و گزارش فروش" />
 
       <div className="seg" style={{ marginBottom: 20 }}>
-        <button className={tab === 'plans'     ? 'on' : ''} onClick={() => setTab('plans')}>پلن‌ها و دوره‌ها</button>
+        <button className={tab === 'plans'  ? 'on' : ''} onClick={() => setTab('plans')}>پلن‌ها و دوره‌ها</button>
-        <button className={tab === 'discounts' ? 'on' : ''} onClick={() => setTab('discounts')}>مدیریت تخفیف‌ها</button>
+        <button className={tab === 'report' ? 'on' : ''} onClick={() => setTab('report')}>گزارش فروش</button>
-        <button className={tab === 'report'    ? 'on' : ''} onClick={() => setTab('report')}>گزارش فروش</button>
       </div>
 
-      {tab === 'plans'     && <PlansTab />}
+      {tab === 'plans'  && <PlansTab />}
-      {tab === 'discounts' && <DiscountTab />}
+      {tab === 'report' && <ReportTab />}
-      {tab === 'report'    && <ReportTab />}
     </>
   );
 }

assets/admin/pages/SubscriptionPage.tsx

@@ -10,6 +10,7 @@ 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';
@@ -55,6 +56,7 @@ 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>('');
 
@@ -122,6 +124,14 @@ 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' }}>
@@ -163,6 +173,7 @@ export default function SubscriptionPage() {
               </div>
             )}
           </div>
+          )}
         </div>
       </SettingsLayout>