Update project files

package.json

@@ -1,11 +1,12 @@
 {
   "name": "webpage-playground",
   "version": "1.0.0",
-  "description": "A modern inventory management demo app featuring multiple pages for browsing, searching, and scanning barcodes. Built with vanilla HTML, CSS, and JavaScript.",
+  "description": "A modern inventory management demo app featuring multiple pages for browsing, searching, and scanning barcodes. Built with React, TypeScript, and CSS.",
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "vite build",
+    "build": "tsc --noEmit && vite build",
+    "typecheck": "tsc --noEmit",
     "preview": "vite preview"
   },
   "repository": {
@@ -22,7 +23,11 @@
     "react-router-dom": "^7.13.2"
   },
   "devDependencies": {
+    "@types/node": "^25.9.1",
+    "@types/react": "^19.2.15",
+    "@types/react-dom": "^19.2.3",
     "@vitejs/plugin-react": "^6.0.1",
+    "typescript": "^6.0.3",
     "vite": "^8.0.3"
   }
 }