experiment with zero

package.json

@@ -3,6 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
+    "@rocicorp/zero": "^0.25.13",
     "@testing-library/dom": "^10.4.0",
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.1.0",
@@ -16,8 +17,9 @@
     "react": "^19.2.4",
     "react-dom": "^19.2.4",
     "react-scripts": "5.0.1",
-    "typescript": "^4.4.2",
-    "web-vitals": "^2.1.0"
+    "typescript": "^5.0.0",
+    "web-vitals": "^2.1.0",
+    "zod": "^4.3.6"
   },
   "scripts": {
     "start": "react-scripts start",