fix fayda

apps/edr-freight-web/backoffice/src/pages/FaydaCallbackPage.tsx

@@ -0,0 +1,56 @@
+import { useEffect, useState } from "react";
+import { Center, Loader, Stack, Text } from "@mantine/core";
+
+import type { FaydaCallbackMessage } from "@/services/verifayda.service";
+
+/**
+ * Landing page for the eSignet redirect_uri (FAYDA_WEB_REDIRECT_URI →
+ * http://localhost:5183/callback). Runs inside the verification popup:
+ * relays ?code&state (or ?error) to the window that opened it via
+ * postMessage, then closes itself. The opener performs the /complete call
+ * so the single-use session is only consumed once, in one place.
+ */
+const FaydaCallbackPage = () => {
+  const [standalone, setStandalone] = useState(false);
+
+  useEffect(() => {
+    const params = new URLSearchParams(window.location.search);
+    const message: FaydaCallbackMessage = {
+      type: "fayda-callback",
+      code: params.get("code") ?? undefined,
+      state: params.get("state") ?? undefined,
+      error: params.get("error") ?? undefined,
+      errorDescription: params.get("error_description") ?? undefined,
+    };
+
+    if (window.opener && window.opener !== window) {
+      (window.opener as Window).postMessage(message, window.location.origin);
+      window.close();
+    } else {
+      // Opened as a full-page redirect instead of a popup — nothing to relay to.
+      setStandalone(true);
+    }
+  }, []);
+
+  return (
+    <Center h="100vh">
+      <Stack align="center" gap="sm">
+        {standalone ? (
+          <>
+            <Text fw={600}>Verification window lost its parent page</Text>
+            <Text size="sm" c="dimmed">
+              Close this tab and restart the verification from the form.
+            </Text>
+          </>
+        ) : (
+          <>
+            <Loader size="sm" />
+            <Text size="sm" c="dimmed">Completing Fayda verification…</Text>
+          </>
+        )}
+      </Stack>
+    </Center>
+  );
+};
+
+export default FaydaCallbackPage;