Add HTTP endpoint helpers to compliance-portal

Introduce a lib/http module with buildEndpoint and getPathPrefix,
extracted from the trust app so the compliance portal can resolve its
GraphQL endpoint with the same path-prefix handling.

Signed-off-by: Émile Ré <emile@probo.com>

apps/compliance-portal/src/lib/http/endpoint.ts

@@ -0,0 +1,42 @@
+// Copyright (c) 2025-2026 Probo Inc <hello@probo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+import { getPathPrefix } from "#/lib/http/pathPrefix";
+
+export function buildEndpoint(): string {
+  let host = import.meta.env.VITE_API_URL;
+
+  if (!host) {
+    host = window.location.origin;
+  }
+
+  const formattedHost
+    = host.startsWith("http://") || host.startsWith("https://")
+      ? host
+      : `https://${host}`;
+
+  const url = new URL(formattedHost);
+
+  const prefix = getPathPrefix();
+  let path: string;
+  if (prefix) {
+    path = `${prefix}/api/trust/v1/graphql`;
+  } else {
+    path = `/api/trust/v1/graphql`;
+  }
+
+  url.pathname = path;
+
+  return url.toString();
+}

apps/compliance-portal/src/lib/http/pathPrefix.ts

@@ -0,0 +1,29 @@
+// Copyright (c) 2026 Probo Inc <hello@probo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+import { matchPath } from "react-router";
+
+export function getPathPrefix() {
+  const match = matchPath(
+    { path: "/trust/:id", caseSensitive: false, end: false },
+    window.location.pathname,
+  );
+
+  let prefix = "";
+  if (match) {
+    prefix = `/trust/${match.params.id}`;
+  }
+
+  return prefix;
+}