feat(settings): complete remaining settings tabs (account, tags, turns)

Fill the three previously-placeholder settings sections so every menu item
is now a real page inside the settings shell:

- حساب کاربری: new authenticated POST /api/v1/user/change-password
  (verifies current password, ≥8 chars, must differ) + account page with a
  profile summary and change-password form.
- برچسب‌ها: new per-tenant TenantTag domain (entity/repo/controller +
  migration) with tenant-scoped CRUD at /api/v1/tenant-tag(s), plus a tags
  management page (list + color + add/edit/delete).
- مدیریت نوبت دهی: export the existing WeeklyScheduleTab from
  DoctorDetailPage and reuse it in a standalone AppointmentSettingsPage
  (current doctor's uuid + addresses).

Wire all three menu entries to their routes. Backend covered by PHPUnit
(change-password, tenant-tag CRUD + ownership); FE covered by Vitest.
API docs updated (auth.md, tag.md).

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

assets/admin/App.tsx

@@ -50,6 +50,9 @@ import SmsWalletPage from './pages/SmsWalletPage';
 import MySecretariesPage from './pages/MySecretariesPage';
 import AdminSubscriptionPage from './pages/AdminSubscriptionPage';
 import SettingsMenuPage from './pages/SettingsMenuPage';
+import AccountSettingsPage from './pages/AccountSettingsPage';
+import TagsSettingsPage from './pages/TagsSettingsPage';
+import AppointmentSettingsPage from './pages/AppointmentSettingsPage';
 import PaymentSuccessPage from './pages/PaymentSuccessPage';
 import PwaInstallBanner from './components/ui/PwaInstallBanner';
 
@@ -195,6 +198,9 @@ export default function App() {
         {/* فاز ۲ — دکتر / کلینیک */}
         <Route path="staff" element={<RoleRoute roles={['doctor', 'clinic']} blockClinicScope><StaffPage /></RoleRoute>} />
         <Route path="settings-menu" element={<RoleRoute roles={['doctor', 'clinic']} blockClinicScope><SettingsMenuPage /></RoleRoute>} />
+        <Route path="account-settings" element={<RoleRoute roles={['doctor', 'clinic', 'secretary']}><AccountSettingsPage /></RoleRoute>} />
+        <Route path="tags-settings" element={<RoleRoute roles={['doctor', 'clinic']} blockClinicScope><TagsSettingsPage /></RoleRoute>} />
+        <Route path="appointment-settings" element={<RoleRoute roles={['doctor']} blockClinicScope><AppointmentSettingsPage /></RoleRoute>} />
         <Route path="subscription" element={<RoleRoute roles={['doctor', 'clinic']} blockClinicScope><SubscriptionPage /></RoleRoute>} />
         <Route path="subscription/success" element={<RoleRoute roles={['doctor', 'clinic']} blockClinicScope><PaymentSuccessPage /></RoleRoute>} />
         <Route path="clinic-services" element={<RoleRoute roles={['doctor', 'clinic']} blockClinicScope><ClinicServicesPage /></RoleRoute>} />