feat: implement MenuButton component and home page layout with global glassmorphism styles

app/layout.tsx

@@ -20,8 +20,8 @@ export default function RootLayout({
       <body className={inter.className}>
         <ThemeProvider
           attribute="data-theme"
-          defaultTheme="system"
-          enableSystem
+          defaultTheme="dark"
+          enableSystem={false}
           disableTransitionOnChange
         >
           {children}