feat(freight:backoffice): added basic frontend integration with auth(login) page

apps/edr-freight-web/backoffice/src/pages/dashboard/DashboardPage.tsx

@@ -1,9 +1,11 @@
+import FeaturePlaceholder from "@/components/FeaturePlaceholder";
+
 const DashboardPage = () => {
   return (
-    <div className="p-6">
-      <h1 className="text-2xl font-semibold">EDR Freight Backoffice</h1>
-      <p className="mt-2 text-gray-600">Backoffice — coming soon.</p>
-    </div>
+    <FeaturePlaceholder
+      title="Operations Dashboard"
+      description="Track internal freight activity, exceptions, and workload from one backoffice workspace."
+    />
   );
 };