修改chat界面样式，增加复制文本消息功能

package.json

@@ -20,6 +20,7 @@
     "jsonwebtoken": "^9.0.2",
     "node-cron": "^3.0.3",
     "pinia": "^2.1.7",
+    "rollup-plugin-visualizer": "^5.12.0",
     "sm-crypto": "^0.3.13",
     "uuid": "^9.0.1",
     "vicons": "^0.0.1",
@@ -38,6 +39,7 @@
     "concurrently": "^8.2.2",
     "cors": "^2.8.5",
     "naive-ui": "^2.38.1",
+    "sass": "^1.77.8",
     "vfonts": "^0.0.3",
     "vite": "^5.0.11"
   }