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

validation-suite/frontend/atlas/lib/api.ts

@@ -118,8 +118,22 @@ export type Paginated<T> = {
   total: number;
   page: number;
   page_size: number;
+  pages?: number;
 };
 
+async function readErrorMessage(response: Response, fallback: string) {
+  const text = await response.text();
+  if (!text) {
+    return fallback;
+  }
+  try {
+    const parsed = JSON.parse(text) as { detail?: string; message?: string };
+    return parsed.detail ?? parsed.message ?? text;
+  } catch {
+    return text;
+  }
+}
+
 export async function login(email: string, password: string) {
   const response = await fetch(`/api/login`, {
     method: "POST",
@@ -155,8 +169,7 @@ export async function apiSend<T>(path: string, token: string, method: "POST" | "
     credentials: "include"
   });
   if (!response.ok) {
-    const detail = await response.text();
-    throw new Error(detail || `API request failed: ${response.status}`);
+    throw new Error(await readErrorMessage(response, `API request failed: ${response.status}`));
   }
   return response.json() as Promise<T>;
 }
@@ -167,7 +180,7 @@ export async function apiDelete(path: string, token: string): Promise<void> {
     credentials: "include"
   });
   if (!response.ok) {
-    throw new Error(`API request failed: ${response.status}`);
+    throw new Error(await readErrorMessage(response, `API request failed: ${response.status}`));
   }
 }
 
@@ -178,7 +191,7 @@ export async function apiFetch<T>(path: string, token: string, init?: RequestIni
     credentials: "include"
   });
   if (!response.ok) {
-    throw new Error(await response.text());
+    throw new Error(await readErrorMessage(response, `API request failed: ${response.status}`));
   }
   return response.json() as Promise<T>;
 }

validation-suite/frontend/atlas/lib/users-query.d.ts

@@ -0,0 +1,9 @@
+export function buildUsersQueryParams(input: {
+  page: number;
+  pageSize: number;
+  search?: string;
+  role?: string;
+  active?: boolean | null;
+  sortBy: string;
+  sortOrder: "asc" | "desc";
+}): URLSearchParams;

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;
+}