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/components/layout/SettingsLayout.tsx

@@ -20,15 +20,15 @@ export type SettingsMenuItem = {
 export const SETTINGS_MENU: SettingsMenuItem[] = [
   { key: 'subscription', label: 'خرید اشتراک',       icon: CreditCardIcon,           to: '/admin/subscription' },
   { key: 'doctor',       label: 'مدیریت پزشک',        icon: UserIcon,                 to: '/admin/profile' },
-  { key: 'appointment',  label: 'مدیریت نوبت دهی',    icon: CalendarDaysIcon },
+  { key: 'appointment',  label: 'مدیریت نوبت دهی',    icon: CalendarDaysIcon,         to: '/admin/appointment-settings' },
   { key: 'clinic',       label: 'مدیریت مطب',         icon: BuildingOffice2Icon,      to: '/admin/my-clinic' },
   { key: 'services',     label: 'خدمات',              icon: WrenchScrewdriverIcon,    to: '/admin/clinic-services' },
   { key: 'payment',      label: 'مدیریت پرداخت',      icon: BanknotesIcon,            to: '/admin/my-financial' },
   { key: 'secretary',    label: 'مدیریت منشی',        icon: UsersIcon,                to: '/admin/my-secretaries' },
   { key: 'insurance',    label: 'مدیریت بیمه',        icon: ShieldCheckIcon,          to: '/admin/insurance-pricing' },
-  { key: 'tags',         label: 'برچسب‌ها',           icon: TagIcon },
+  { key: 'tags',         label: 'برچسب‌ها',           icon: TagIcon,                  to: '/admin/tags-settings' },
   { key: 'sms',          label: 'پیامک‌ها',           icon: ChatBubbleLeftRightIcon,  to: '/admin/sms-wallet' },
-  { key: 'account',      label: 'حساب کاربری',        icon: UserCircleIcon },
+  { key: 'account',      label: 'حساب کاربری',        icon: UserCircleIcon,           to: '/admin/account-settings' },
 ];
 
 // ── Shared item styling ──────────────────────────────────────────────────────