feat(ui): prevent self-modification in People management and highlight current user (#5441)

# Description of Changes

This PR improves the People management UI by preventing users from
modifying or deleting their own account and by visually highlighting the
currently logged-in user.

<img width="675" height="196" alt="image"
src="https://github.com/user-attachments/assets/c45fb0b6-c766-412c-a53b-b72aed2925d2"
/>


### What was changed
- Integrated session-based authentication context to identify the
currently logged-in user.
- Added a helper to detect the current user in the user list.
- Highlighted the current user's row with a subtle background color.
- Disabled self-actions:
  - Editing own role
  - Enabling/disabling own account
  - Deleting own account
- Kept password change available for the current user.

### Why the change was made
- Prevents accidental self-lockout or privilege removal.
- Aligns UI behavior with common security best practices.
- Improves clarity by visually distinguishing the active user account.

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

frontend/src/proprietary/components/shared/config/configSections/PeopleSection.tsx

@@ -31,11 +31,13 @@ import { useNavigate } from 'react-router-dom';
 import UpdateSeatsButton from '@app/components/shared/UpdateSeatsButton';
 import { useLicense } from '@app/contexts/LicenseContext';
 import ChangeUserPasswordModal from '@app/components/shared/ChangeUserPasswordModal';
+import { useAuth } from '@app/auth/UseSession';
 
 export default function PeopleSection() {
   const { t } = useTranslation();
   const { config } = useAppConfig();
   const { loginEnabled } = useLoginRequired();
+  const { user: currentUser } = useAuth();
   const navigate = useNavigate();
   const { licenseInfo: globalLicenseInfo } = useLicense();
   const [users, setUsers] = useState<User[]>([]);
@@ -77,6 +79,7 @@ export default function PeopleSection() {
       ? t('workspace.people.license.noSlotsAvailable', 'No user slots available')
       : null;
 
+  const isCurrentUser = (user: User) => currentUser?.username === user.username;
 
   // Form state for edit user modal
   const [editForm, setEditForm] = useState({
@@ -463,7 +466,10 @@ export default function PeopleSection() {
             </Table.Tr>
           ) : (
             filteredUsers.map((user) => (
-              <Table.Tr key={user.id}>
+              <Table.Tr
+                key={user.id}
+                style={isCurrentUser(user) ? { backgroundColor: 'rgba(34, 139, 230, 0.08)' } : undefined}
+              >
                 <Table.Td>
                   <Group gap="xs" wrap="nowrap">
                     <Tooltip
@@ -577,6 +583,7 @@ export default function PeopleSection() {
                           </ActionIcon>
                         </Menu.Target>
                         <Menu.Dropdown style={{ zIndex: Z_INDEX_OVER_CONFIG_MODAL }}>
+                          {!isCurrentUser(user) && (
                             <Menu.Item
                               leftSection={<LocalIcon icon="edit" width="1rem" height="1rem" />}
                               onClick={() => openEditModal(user)}
@@ -584,6 +591,7 @@ export default function PeopleSection() {
                             >
                               {t('workspace.people.editRole')}
                             </Menu.Item>
+                          )}
                           <Menu.Item
                             leftSection={<LocalIcon icon="lock" width="1rem" height="1rem" />}
                             onClick={() => openChangePasswordModal(user)}
@@ -591,6 +599,7 @@ export default function PeopleSection() {
                           >
                             {t('workspace.people.changePassword.action', 'Change password')}
                           </Menu.Item>
+                          {!isCurrentUser(user) && (
                             <Menu.Item
                               leftSection={user.enabled ? <LocalIcon icon="person-off" width="1rem" height="1rem" /> : <LocalIcon icon="person-check" width="1rem" height="1rem" />}
                               onClick={() => handleToggleEnabled(user)}
@@ -598,10 +607,15 @@ export default function PeopleSection() {
                             >
                               {user.enabled ? t('workspace.people.disable') : t('workspace.people.enable')}
                             </Menu.Item>
+                          )}
+                          {!isCurrentUser(user) && (
+                            <>
                               <Menu.Divider />
                               <Menu.Item color="red" leftSection={<LocalIcon icon="delete" width="1rem" height="1rem" />} onClick={() => handleDeleteUser(user)} disabled={!loginEnabled}>
                                 {t('workspace.people.deleteUser')}
                               </Menu.Item>
+                            </>
+                          )}
                         </Menu.Dropdown>
                       </Menu>
                     </Group>