refactor. pre-deploy

.history/frontend/linktree-frontend/.env_20251029195517.local

@@ -0,0 +1,4 @@
+# Next.js Environment Variables
+# NOTE: For API calls in client components, use relative URLs like '/api/auth/login'
+# This variable is only used for server-side rendering and image URLs
+NEXT_PUBLIC_API_URL=http://localhost:8000