Next.js Supabase V3 (#463)

Version 3 of the kit:
- Radix UI replaced with Base UI (using the Shadcn UI patterns)
- next-intl replaces react-i18next
- enhanceAction deprecated; usage moved to next-safe-action
- main layout now wrapped with [locale] path segment
- Teams only mode
- Layout updates
- Zod v4
- Next.js 16.2
- Typescript 6
- All other dependencies updated
- Removed deprecated Edge CSRF
- Dynamic Github Action runner

apps/web/app/[locale]/admin/page.tsx

@@ -0,0 +1,15 @@
+import { AdminDashboard } from '@kit/admin/components/admin-dashboard';
+import { AdminGuard } from '@kit/admin/components/admin-guard';
+import { PageBody, PageHeader } from '@kit/ui/page';
+
+function AdminPage() {
+  return (
+    <PageBody>
+      <PageHeader description={`Super Admin`} />
+
+      <AdminDashboard />
+    </PageBody>
+  );
+}
+
+export default AdminGuard(AdminPage);