refactor: enhance environment handling with demo mode support

src/components/layout/addMenu.tsx

@@ -66,7 +66,7 @@ export default function AddMenu() {
             </Link>
           </DropdownMenuItem>
         ))}
-        {ENVIRONMENT === "development" && (
+        {(ENVIRONMENT === "development" || ENVIRONMENT === "demo") && (
           <>
             <DropdownMenuSeparator />
             <DropdownMenuItem asChild>

src/lib/constants.ts

@@ -1,4 +1,8 @@
-export const ENVIRONMENT = process.env.NODE_ENV || "development"
+const isDemo = process.env.DEMO_MODE === "true"
+
+export const ENVIRONMENT = isDemo
+  ? "demo"
+  : process.env.NODE_ENV || "development"
 
 export const SITE_URL =
   ENVIRONMENT === "development" ? "http://localhost:3000" : process.env.DOMAIN