feat: add MySecretariesPage and AdminSubscriptionPage (PRD completion)

- MySecretariesPage: doctor/clinic can manage their own secretaries
  with add/permissions-matrix/deactivate; uses GET /api/v1/secretaries/{doctorUuid}
- AdminSubscriptionPage: admin can create/edit plans and periods,
  view subscription sales report; tabs: پنل‌ها / گزارش فروش
- Sidebar: add منشیان link for doctor+clinic roles, add اشتراک‌ها link for admin
- App.tsx: add /my-secretaries and /admin-subscription routes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

assets/admin/App.tsx

@@ -37,6 +37,8 @@ import StaffPage from './pages/StaffPage';
 import SubscriptionPage from './pages/SubscriptionPage';
 import ClinicServicesPage from './pages/ClinicServicesPage';
 import SmsWalletPage from './pages/SmsWalletPage';
+import MySecretariesPage from './pages/MySecretariesPage';
+import AdminSubscriptionPage from './pages/AdminSubscriptionPage';
 import PwaInstallBanner from './components/ui/PwaInstallBanner';
 
 // ── Guards ──────────────────────────────────────────────────────────────────
@@ -154,6 +156,8 @@ export default function App() {
         <Route path="subscription" element={<RoleRoute roles={['doctor', 'clinic']}><SubscriptionPage /></RoleRoute>} />
         <Route path="clinic-services" element={<RoleRoute roles={['doctor', 'clinic']}><ClinicServicesPage /></RoleRoute>} />
         <Route path="sms-wallet" element={<RoleRoute roles={['doctor', 'clinic']}><SmsWalletPage /></RoleRoute>} />
+        <Route path="my-secretaries" element={<RoleRoute roles={['doctor', 'clinic']}><MySecretariesPage /></RoleRoute>} />
+        <Route path="admin-subscription" element={<RoleRoute roles={['admin']}><AdminSubscriptionPage /></RoleRoute>} />
 
         {/* فقط ادمین */}
         <Route path="clinics/new" element={<RoleRoute roles={['admin']}><ClinicFormPage /></RoleRoute>} />