Build EHSAN Closed Donation Loop POC — full bilingual Arabic/English app

- Backend (api-server): Complete in-memory mock DB with 11 seed cases, 5 eligible
  beneficiaries, 3 donors, and WhatsApp log. All 14 API routes implemented across
  requests, donors, stats, and whatsapp-log. OpenClaw integration with OPENCLAW_SIMULATE
  toggle. UUID-based IDs. Full status machine (new → closed, 10 steps).

- Frontend (ehsan-poc): 8 pages fully implemented using all generated API hooks:
  Home (stats counters, 10-step workflow diagram), Request (form with eligibility
  result), Opportunities (card grid with progress bars), Donate (case summary +
  donor form), Admin (full data table with contextual action buttons), Track
  (10-step visual timeline in green), ThankYou (message form), WhatsApp Log
  (WhatsApp bubble preview + OpenClaw send button).

- Bilingual LanguageContext (AR/EN) with RTL/LTR toggle, localStorage persistence.
  EHSAN green palette (HSL 143), Tajawal font, fully responsive.
  TypeScript clean — zero errors.

artifacts/ehsan-poc/src/pages/not-found.tsx

@@ -0,0 +1,21 @@
+import { Card, CardContent } from "@/components/ui/card";
+import { AlertCircle } from "lucide-react";
+
+export default function NotFound() {
+  return (
+    <div className="min-h-screen w-full flex items-center justify-center bg-gray-50">
+      <Card className="w-full max-w-md mx-4">
+        <CardContent className="pt-6">
+          <div className="flex mb-4 gap-2">
+            <AlertCircle className="h-8 w-8 text-red-500" />
+            <h1 className="text-2xl font-bold text-gray-900">404 Page Not Found</h1>
+          </div>
+
+          <p className="mt-4 text-sm text-gray-600">
+            Did you forget to add the page to the router?
+          </p>
+        </CardContent>
+      </Card>
+    </div>
+  );
+}