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/InsurancePricingPage.tsx

@@ -2,9 +2,11 @@ import PageHeader from '../components/ui/PageHeader';
 import TenantInsuranceContracts from '../components/TenantInsuranceContracts';
 import FreeVisitPrice from '../components/FreeVisitPrice';
 import FeatureGate from '../components/ui/FeatureGate';
+import SettingsLayout from '../components/layout/SettingsLayout';
 
 export default function InsurancePricingPage() {
   return (
+    <SettingsLayout active="insurance">
     <FeatureGate feature="insurance">
       <div className="fade-in">
         <PageHeader
@@ -15,5 +17,6 @@ export default function InsurancePricingPage() {
         <TenantInsuranceContracts />
       </div>
     </FeatureGate>
+    </SettingsLayout>
   );
 }