chore: add proper-lockfile for safe database read/write operations and implement retry logic for file access

src/shared/components/Header.js

@@ -6,6 +6,7 @@ import Link from "next/link";
 import PropTypes from "prop-types";
 import ProviderIcon from "@/shared/components/ProviderIcon";
 import { ThemeToggle, LanguageSwitcher } from "@/shared/components";
+import NineRemoteButton from "@/shared/components/NineRemoteButton";
 import { OAUTH_PROVIDERS, APIKEY_PROVIDERS } from "@/shared/constants/config";
 import { translate } from "@/i18n/runtime";
 
@@ -187,6 +188,9 @@ export default function Header({ onMenuClick, showMenuButton = true }) {
 
       {/* Right actions */}
       <div className="flex items-center gap-3 ml-auto">
+        {/* 9Remote button */}
+        <NineRemoteButton />
+
         {/* Language switcher */}
         <LanguageSwitcher />