perf：集成代码块复制按钮增加title

nezha-fronted/src/components/common/copy-code/utils/markdown-it-copy-code.js

@@ -5,16 +5,20 @@
 
 /* eslint-disable max-len */
 module.exports = function (md) {
-  // === Start: 防止复制按钮不断被创建 ===
+  // === Start: Patch 防止复制按钮不断被创建 ===
   if (!md.renderer.rules.originalFence) {
     md.renderer.rules.originalFence = md.renderer.rules.fence
   }
-  // === End: Patch ===
   const fence = md.renderer.rules.originalFence
+  // === End: Patch ===
 
+  // const fence = md.renderer.rules.fence
   md.renderer.rules.fence = function () {
+    const i18n = require('@/components/common/i18n')
+    const title = i18n.default.t('overall.copyText')
+
     const rawCode = fence.apply(void 0, arguments)
-    const button = '\n    <button class="v-md-copy-code-btn" type="button">\n      <i class="nz-icon nz-icon-override"></i>\n    </button>'
+    const button = `\n    <button title="${title}" class="v-md-copy-code-btn" type="button">\n      <i class="nz-icon nz-icon-override"></i>\n    </button>`
     const finalCode = rawCode.replace('<!--beforeend-->', button + '<!--beforeend-->').replace('v-md-pre-wrapper', 'v-md-pre-wrapper copy-code-mode')
     return finalCode
   }

nezha-fronted/src/entrance/app/main.js

@@ -54,6 +54,12 @@ import hljs from 'highlight.js'
 // markdown支持代码复制
 import createCopyCodePlugin from '@/components/common/copy-code/index'
 import '@/components/common/copy-code/copy-code.css'
+VMdPreview.xss.extend({
+  // extend white list
+  whiteList: {
+    button: ['title']
+  }
+})
 VMdPreview.use(githubTheme, {
   Hljs: hljs
 })