feat(admin): session edit form, payment edit/delete UI, and audit history modal

- SessionServiceCard menu gains «ویرایش» and «تاریخچه تغییرات» items.
- SessionAuditModal shows the session's change history (field, op badge,
  old->new, actor, time) from /session/{uuid}/audit-log.
- PaymentStep payment rows get edit (modal) + delete (confirm) controls for
  non-wallet payments, calling the new PATCH/DELETE payment endpoints.
- CreateStep accepts an editSession prop (prefill + PATCH); EditSessionPage
  reuses it at /patients/:recordUuid/session/:sessionUuid/edit.

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

assets/admin/App.tsx

@@ -42,6 +42,7 @@ import MyPatientsPage from './pages/MyPatientsPage';
 import MyPaymentsPage from './pages/MyPaymentsPage';
 import MyPaymentDetailPage from './pages/MyPaymentDetailPage';
 import NewSessionPage from './pages/NewSessionPage';
+import EditSessionPage from './pages/EditSessionPage';
 import SessionPaymentPage from './pages/SessionPaymentPage';
 import InsurancePricingPage from './pages/InsurancePricingPage';
 import ClaimsPage from './pages/ClaimsPage';
@@ -215,6 +216,8 @@ export default function App() {
         <Route path="my-patients/:recordUuid/session/new" element={<RoleRoute roles={['doctor', 'secretary', 'clinic']} blockClinicScope><NewSessionPage /></RoleRoute>} />
         <Route path="patients/:recordUuid/session/:sessionUuid/pay" element={<RoleRoute roles={['doctor', 'secretary', 'clinic']} blockClinicScope><SessionPaymentPage /></RoleRoute>} />
         <Route path="my-patients/:recordUuid/session/:sessionUuid/pay" element={<RoleRoute roles={['doctor', 'secretary', 'clinic']} blockClinicScope><SessionPaymentPage /></RoleRoute>} />
+        <Route path="patients/:recordUuid/session/:sessionUuid/edit" element={<RoleRoute roles={['doctor', 'secretary', 'clinic']} blockClinicScope><EditSessionPage /></RoleRoute>} />
+        <Route path="my-patients/:recordUuid/session/:sessionUuid/edit" element={<RoleRoute roles={['doctor', 'secretary', 'clinic']} blockClinicScope><EditSessionPage /></RoleRoute>} />
         <Route path="insurance-pricing" element={<RoleRoute roles={['doctor', 'clinic']} blockClinicScope><InsurancePricingPage /></RoleRoute>} />
         <Route path="claims" element={<RoleRoute roles={['doctor', 'clinic']} blockClinicScope><ClaimsPage /></RoleRoute>} />
         <Route path="my-financial" element={<RoleRoute roles={['doctor', 'secretary', 'clinic']}><MyFinancialPage /></RoleRoute>} />