feat(users): add user type modification functionality

- Add modifyType API endpoint in userApi
- Implement user type modification in Users.vue

src/views/Users.vue

@@ -140,7 +140,14 @@ export default {
                     loading.value = false;
                 }
             } else if (showEditModal.value) {
-                showNotification('Edit user feature is not implemented yet', 'warning');
+                try {
+                    await userApi.modifyType(editingUserId.value, formData.value.type);
+                    showNotification('User type modified successfully', 'success');
+                    closeModal();
+                    await loadUsers();
+                } catch (error) {
+                    showNotification(error.message || 'Failed to modify user type', 'error');
+                }
             }
         };