feat(patients): phase B5 — wire service creation into the detail page

Reuse the existing NewSessionPage (service section/item + insurance coverage +
payment flow → POST /patient/{recordUuid}/session) from the new patient detail:
add a patients-scoped route /admin/patients/:recordUuid/session/new and a
"سرویس جدید" action on the services tab. The multi-step visual restyle and the
standalone invoice-issuance screen remain a follow-up (the underlying
session/billing endpoints already exist).

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

assets/admin/App.tsx

@@ -197,6 +197,7 @@ export default function App() {
         <Route path="patients/new" element={<RoleRoute roles={['doctor', 'secretary', 'clinic']} blockClinicScope><PatientRecordFormPage /></RoleRoute>} />
         <Route path="patients/:uuid/edit" element={<RoleRoute roles={['doctor', 'secretary', 'clinic']} blockClinicScope><PatientRecordFormPage /></RoleRoute>} />
         <Route path="patients/:uuid" element={<RoleRoute roles={['doctor', 'secretary', 'clinic']} blockClinicScope><PatientDetailPage /></RoleRoute>} />
+        <Route path="patients/:recordUuid/session/new" element={<RoleRoute roles={['doctor', 'secretary', 'clinic']} blockClinicScope><NewSessionPage /></RoleRoute>} />
         <Route path="my-patients/:recordUuid/session/new" element={<RoleRoute roles={['doctor', 'secretary', 'clinic']} blockClinicScope><NewSessionPage /></RoleRoute>} />
         <Route path="insurance-pricing" element={<RoleRoute roles={['doctor', 'clinic']} blockClinicScope><InsurancePricingPage /></RoleRoute>} />
         <Route path="claims" element={<RoleRoute roles={['doctor', 'clinic']} blockClinicScope><ClaimsPage /></RoleRoute>} />