feat(settings): render doctor/clinic settings pages inside the settings shell

Wrap the existing settings-area pages — doctor profile (مدیریت پزشک),
insurance pricing (بیمه), payment report (پرداخت), SMS wallet (پیامک‌ها),
secretaries (منشی) and clinic info (مطب) — in SettingsLayout so they appear
under the settings sub-navigation like the Figma design, with the matching
menu item highlighted. Wire the doctor/clinic menu entries to their routes.

The نوبت‌دهی / برچسب‌ها / حساب کاربری entries stay as disabled placeholders
until they have their own pages/designs.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

assets/admin/pages/MyClinicPage.tsx

@@ -1,8 +1,9 @@
 import { useEffect } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { useAuthStore } from '../stores/authStore';
+import SettingsLayout from '../components/layout/SettingsLayout';
 
-export default function MyClinicPage() {
+function MyClinicPageContent() {
   const { dbUuid, fetchMe } = useAuthStore();
   const navigate = useNavigate();
 
@@ -23,3 +24,11 @@ export default function MyClinicPage() {
     </div>
   );
 }
+
+export default function MyClinicPage() {
+  return (
+    <SettingsLayout active="clinic">
+      <MyClinicPageContent />
+    </SettingsLayout>
+  );
+}