fix(secretary): settings menu structure, clinic timeline access, patient delete gate

Three reported secretary-access bugs.

1) Settings menu structure. Phase B flat-listed staff/discounts/sms/tags/
   appointment_settings/clinic_doctors in the secretary's main sidebar. Mirror
   the doctor/clinic layout instead: only inventory + services stay in the main
   «مدیریت» nav; the rest live under a single «تنظیمات» entry
   (→ /admin/account-settings). Made both settings navs permission-aware for
   secretaries: SETTINGS_MENU (menuForRole now takes `can`) and
   PurchaseSubscriptionSidebar filter by a per-item `perm`/`alwaysOpen` instead
   of role only, so a secretary sees exactly their permitted settings pages and
   owner-only items (subscription, secretary-management) stay hidden.

2) Clinic secretary appointment timeline. AppointmentsPage treated a
   clinic-scoped secretary as a single-doctor profile: the doctor list was
   fetched/shown only for isClinic/isAdmin, so no doctor tabs, timeline, or
   booking. Now a clinic-scoped secretary is multi-doctor: fetches the doctor
   list, shows tabs, auto-selects the first doctor. The list comes from a new
   authenticated endpoint GET /api/v1/my/clinic-doctors returning only the
   secretary's ASSIGNED doctors — /clinic/doctor-list is on the public (no-JWT)
   firewall and cannot scope by user, so it would have leaked unbookable doctors.

3) Patient record delete. The `patients.delete` toggle was dead: every record
   delete (note/medical-record/attachment/call/message) was gated as
   `patients.update`. Mapped them to `patients.delete` so the toggle is honored
   and delete is controllable separately from edit.

New SecretaryAccessChecker::assignedClinicDoctorIds. Tests: doctor-list scoping,
patients.delete separation (denied/allowed). docs/api secretary.md +
appointment.md updated. Backend 286 + frontend 25 pass.

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

assets/admin/pages/SettingsMenuPage.tsx

@@ -3,6 +3,7 @@ import { Link } from 'react-router-dom';
 import { ChevronLeftIcon } from '@heroicons/react/24/outline';
 import { menuForRole } from '../components/layout/SettingsLayout';
 import { useAuthStore } from '../stores/authStore';
+import { usePermissions } from '../hooks/usePermissions';
 
 /**
  * SettingsMenuPage — the settings landing list for doctor/clinic users.
@@ -12,7 +13,8 @@ import { useAuthStore } from '../stores/authStore';
  */
 export default function SettingsMenuPage() {
   const primaryRole = useAuthStore((s) => s.primaryRole);
-  const items = menuForRole(primaryRole);
+  const { can } = usePermissions();
+  const items = menuForRole(primaryRole, can);
 
   return (
     <div className="fade-in" style={{ maxWidth: 720, margin: '0 auto' }}>