feat: refactor clinic management into a dedicated settings tab

- Removed MyClinicPage and redirected its functionality to a new ClinicDoctorsPage.
- Created ClinicDoctorsManager component for managing doctors and invitations within the settings layout.
- Updated backend permissions to allow clinic owners to detach doctors, alongside admins.
- Adjusted API documentation to reflect new permission structure.
- Updated tests to cover new functionality and permissions.
- Modified sidebar and settings menu to reflect the new structure and role-based visibility.

assets/admin/components/layout/PurchaseSubscriptionSidebar.tsx

@@ -1,6 +1,7 @@
 import React, { useMemo, useState } from 'react';
 import { Link } from 'react-router-dom';
 import { SearchHeaderP } from '../../pages/subscriptionIcons';
+import { useAuthStore } from '../../stores/authStore';
 
 /**
  * Settings sub-navigation for the subscription page — item list and order copied
@@ -12,28 +13,32 @@ import { SearchHeaderP } from '../../pages/subscriptionIcons';
  * This list is intentionally separate from SETTINGS_MENU (SettingsLayout) so the
  * other settings pages are not affected.
  */
-type NavItem = { key: string; label: string; to?: string };
+/** `roles`: when set, the item is only shown to those roles (omit = every role). */
+type NavItem = { key: string; label: string; to?: string; roles?: string[] };
 
 const NAV_ITEMS: NavItem[] = [
-  { key: 'subscription', label: 'خرید اشتراک',    to: '/admin/subscription' },
-  { key: 'payment',      label: 'مدیریت پرداخت',   to: '/admin/my-financial' },
-  { key: 'appointment',  label: 'مدیریت نوبت دهی', to: '/admin/appointment-settings' },
-  { key: 'insurance',    label: 'مدیریت بیمه',     to: '/admin/insurance-pricing' },
-  { key: 'discounts',    label: 'مدیریت تخفیف‌ها', to: '/admin/discounts' },
-  { key: 'tags',         label: 'تگ ها',           to: '/admin/tags-settings' },
-  { key: 'sms',          label: 'پیامک ها',        to: '/admin/sms-wallet' },
-  { key: 'clinic',       label: 'مدیریت مطب',      to: '/admin/my-clinic' },
-  { key: 'secretary',    label: 'مدیریت منشی',     to: '/admin/my-secretaries' },
-  { key: 'staff',        label: 'پرسنل',           to: '/admin/staff' },
-  { key: 'account',      label: 'حساب کاربری',     to: '/admin/account-settings' },
-  { key: 'security',     label: 'تنظیمات' },
+  { key: 'subscription',   label: 'خرید اشتراک',    to: '/admin/subscription' },
+  { key: 'payment',        label: 'مدیریت پرداخت',   to: '/admin/my-financial' },
+  { key: 'appointment',    label: 'مدیریت نوبت دهی', to: '/admin/appointment-settings', roles: ['doctor'] },
+  { key: 'insurance',      label: 'مدیریت بیمه',     to: '/admin/insurance-pricing' },
+  { key: 'discounts',      label: 'مدیریت تخفیف‌ها', to: '/admin/discounts', roles: ['doctor', 'clinic'] },
+  { key: 'tags',           label: 'تگ ها',           to: '/admin/tags-settings' },
+  { key: 'sms',            label: 'پیامک ها',        to: '/admin/sms-wallet' },
+  { key: 'clinic-doctors', label: 'پزشکان کلینیک',   to: '/admin/settings/clinic-doctors', roles: ['clinic'] },
+  { key: 'secretary',      label: 'مدیریت منشی',     to: '/admin/my-secretaries' },
+  { key: 'staff',          label: 'پرسنل',           to: '/admin/staff' },
+  { key: 'account',        label: 'حساب کاربری',     to: '/admin/account-settings' },
+  { key: 'security',       label: 'تنظیمات' },
 ];
 
 export default function PurchaseSubscriptionSidebar({ active }: { active: string }) {
   const [query, setQuery] = useState('');
+  const primaryRole = useAuthStore((s) => s.primaryRole);
   const items = useMemo(
-    () => NAV_ITEMS.filter((i) => i.label.includes(query.trim())),
-    [query],
+    () => NAV_ITEMS
+      .filter((i) => !i.roles || (primaryRole != null && i.roles.includes(primaryRole)))
+      .filter((i) => i.label.includes(query.trim())),
+    [query, primaryRole],
   );
 
   return (