Update react and react-dom to 18.2.0 for compatibility with React Testing Library

Author: Amanuel-Abera

package-lock.json

@@ -19,8 +19,8 @@
     "jsonwebtoken": "^9.0.2",
     "jwt-decode": "^4.0.0",
     "next": "15.0.3",
-    "react": "^19.0.0",
-    "react-dom": "^19.0.0",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
     "react-icons": "^5.3.0",
     "zod": "^3.23.8"
   },