chore(deps): update dependency zod to v4

Author: renovate[bot]

package.json

@@ -61,7 +61,7 @@
     "v-calendar": "3.1.2",
     "vue-slicksort": "2.0.5",
     "vue3-apexcharts": "1.8.0",
-    "zod": "3.25.76"
+    "zod": "4.1.8"
   },
   "devDependencies": {
     "@antfu/eslint-config": "3.16.0",