fix(adminfront): ensure tenant admin can always access their tenant even if manageable list is empty

adminfront/src/components/layout/AppLayout.tsx

@@ -60,8 +60,8 @@ function AppLayout() {
         icon: Building2,
       });
     } else if (isTenantAdmin) {
-      if (manageableCount === 1 && profile?.tenantId) {
-        // Direct link if only one tenant
+      if (manageableCount <= 1 && profile?.tenantId) {
+        // Direct link if only one (or zero in array but has tenantId) tenant
         items.splice(1, 0, {
           label: "ui.admin.nav.my_tenant",
           to: `/tenants/${profile.tenantId}`,