feat: implement configuration management and enhance user registration flow

k-tv-frontend/app/(auth)/login/page.tsx

@@ -3,11 +3,13 @@
 import Link from "next/link";
 import { useState } from "react";
 import { useLogin } from "@/hooks/use-auth";
+import { useConfig } from "@/hooks/use-channels";
 
 export default function LoginPage() {
   const [email, setEmail] = useState("");
   const [password, setPassword] = useState("");
   const { mutate: login, isPending, error } = useLogin();
+  const { data: config } = useConfig();
 
   const handleSubmit = (e: React.FormEvent) => {
     e.preventDefault();
@@ -63,12 +65,14 @@ export default function LoginPage() {
         </button>
       </form>
 
-      <p className="text-center text-xs text-zinc-500">
-        No account?{" "}
-        <Link href="/register" className="text-zinc-300 hover:text-white">
-          Create one
-        </Link>
-      </p>
+      {config?.allow_registration !== false && (
+        <p className="text-center text-xs text-zinc-500">
+          No account?{" "}
+          <Link href="/register" className="text-zinc-300 hover:text-white">
+            Create one
+          </Link>
+        </p>
+      )}
     </div>
   );
 }