fix: update TypeScript version to 4.9.5 for compatibility with react-scripts

frontend/package.json

@@ -21,7 +21,7 @@
   "devDependencies": {
     "@types/react": "^18.2.15",
     "@types/react-dom": "^18.2.7",
-    "typescript": "^5.1.6",
+    "typescript": "^4.9.5",
     "react-scripts": "5.0.1"
   },
   "browserslist": {

package.json

@@ -19,7 +19,7 @@
     "@types/express": "^4.17.17",
     "@types/node": "^20.4.5",
     "@types/cors": "^2.8.13",
-    "typescript": "^5.1.6",
+    "typescript": "^4.9.5",
     "nodemon": "^3.0.1",
     "ts-node": "^10.9.1"
   }