chore(deps): update dependency nuxt to v3 [security]

Author: renovate[bot]

package.json

@@ -26,7 +26,7 @@
     "@nuxt/vue-app": "2.18.1",
     "@types/consola": "2.2.8",
     "@types/node": "24.9.2",
-    "nuxt": "2.15.8",
+    "nuxt": "3.12.4",
     "prettier": "3.6.2",
     "standard-version": "9.5.0",
     "typescript": "5.9.3"