Clean up middleware, add security-headers to non-Zammad pages

apps/link/app/_components/ZammadLoginProvider.tsx

@@ -0,0 +1,30 @@
+"use client";
+
+import { FC, PropsWithChildren, useEffect } from "react";
+import { useRouter } from "next/navigation";
+import { useSession } from "next-auth/react";
+
+export const ZammadLoginProvider: FC<PropsWithChildren> = ({ children }) => {
+  const { data: session, status, update } = useSession();
+  const router = useRouter();
+
+  useEffect(() => {
+    const checkSession = async () => {
+      if (status === "authenticated") {
+        const response = await fetch("/api/v1/users/me", {
+          method: "GET",
+        });
+
+        if (response.status !== 200) {
+          window.location.href = "/auth/sso";
+        }
+      }
+    };
+
+    const interval = setInterval(checkSession, 15000);
+
+    return () => clearInterval(interval);
+  }, [session, status, update, router]);
+
+  return children;
+};