chore: fix frontend lints and format issues

- Resolve 'noDelete' by using undefined assignment in TenantSchemaPage
- Resolve React list key warning by using client_id in UserDetailPage
- Run biome formatter across modified components

adminfront/src/features/tenants/routes/TenantSchemaPage.tsx

@@ -127,7 +127,7 @@ export function TenantSchemaPage() {
     mutationFn: (newFields: SchemaField[]) => {
       // Remove legacy loginIdField, keep isLoginId natively in userSchema
       const newConfig = { ...tenantQuery.data?.config };
-      delete newConfig.loginIdField;
+      newConfig.loginIdField = undefined;
       newConfig.userSchema = newFields;
 
       return updateTenant(tenantId, {