Remove unused pinia-plugin-persistedstate plugin

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RaRBJFZKSTA7naHGuQHfnQ

package.json

@@ -36,7 +36,6 @@
     "mitt": "^3.0.1",
     "moment": "^2.30.1",
     "pinia": "^3.0.4",
-    "pinia-plugin-persistedstate": "^4.7.1",
     "primeicons": "^7.0.0",
     "primevue": "^4.5.4",
     "sweetalert2": "^11.4.4",