fix(users): repair create delete and duplicate email handling

validation-suite/frontend/atlas/lib/users-query.js

@@ -0,0 +1,18 @@
+export function buildUsersQueryParams({ page, pageSize, search, role, active, sortBy, sortOrder }) {
+  const params = new URLSearchParams({
+    page: String(page),
+    page_size: String(pageSize),
+    sort_by: sortBy,
+    sort_order: sortOrder
+  });
+  if (search && search.trim()) {
+    params.set("search", search.trim());
+  }
+  if (role) {
+    params.set("role", role);
+  }
+  if (active === true || active === false) {
+    params.set("active", String(active));
+  }
+  return params;
+}