fix: superadmin can now assign brands/modules to themselves

The self-edit path only sent name+phone. Superadmins now use the full
team update endpoint so brands, modules, and role changes persist.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/src/pages/Team.jsx

@@ -131,7 +131,7 @@ export default function Team() {
 
   const handlePanelSave = async (memberId, data, isEditingSelf) => {
     try {
-      if (isEditingSelf) {
+      if (isEditingSelf && user?.role !== 'superadmin') {
         await api.patch('/users/me/profile', {
           name: data.name,
           phone: data.phone,