chore: remove echarts dependency

app/package.json

@@ -22,7 +22,6 @@
     "@types/dompurify": "^3.0.5",
     "axios": "^1.6.0",
     "dompurify": "^3.0.6",
-    "echarts": "^5.4.3",
     "marked": "^10.0.0",
     "pinia": "^2.1.7",
     "socket.io-client": "^4.7.1",