Converted to typescript

package.json

@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "vite build",
+    "build": "tsc -b && vite build",
     "lint": "eslint .",
     "preview": "vite preview"
   },
@@ -19,6 +19,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.39.1",
+    "@types/node": "^24.10.1",
     "@types/react": "^19.2.7",
     "@types/react-dom": "^19.2.3",
     "@vitejs/plugin-react": "^5.1.1",
@@ -26,6 +27,8 @@
     "eslint-plugin-react-hooks": "^7.0.1",
     "eslint-plugin-react-refresh": "^0.4.24",
     "globals": "^16.5.0",
+    "typescript": "~5.9.3",
+    "typescript-eslint": "^8.48.0",
     "vite": "^7.3.1"
   }
-}
+}