add copy

package-lock.json

@@ -15,6 +15,7 @@
         "@vueuse/core": "^12.8.2",
         "axios": "^1.8.1",
         "codemirror": "^6.0.1",
+        "copy-text-to-clipboard": "^3.2.0",
         "github-markdown-css": "^5.8.1",
         "highlight.js": "^11.11.1",
         "marked": "^15.0.7",
@@ -1432,6 +1433,18 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/copy-text-to-clipboard": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/copy-text-to-clipboard/-/copy-text-to-clipboard-3.2.0.tgz",
+      "integrity": "sha512-RnJFp1XR/LOBDckxTib5Qjr/PMfkatD0MUCQgdpqS8MdKiNUzBjAQBEN6oUy+jW7LI93BBG3DtMB2KOOKpGs2Q==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/core-js": {
       "version": "3.40.0",
       "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.40.0.tgz",