Add in-memory caching for online count, enable compression, and add staleTimes for router cache

src/app/layout.tsx

@@ -67,6 +67,8 @@ export default async function RootLayout({ children }: { children: ReactNode })
       <head>
         <meta name="theme-default-dark" content={String(defaultDark)} />
         <script src="/scripts/theme-init.js" />
+        <link rel="preconnect" href="https://www.habbo.com" />
+        <link rel="dns-prefetch" href="https://www.habbo.com" />
       </head>
       <body
         className="flex min-h-screen flex-col site-bg"