perf: 优化体积，highlight.js按需导入与i18n按需加载 (#696)

* perf: 优化打包体积，highlight.js按需导入与i18n按需加载

1. highlight.js: 从全量导入改为 core + 注册27种常用语言，减少约500~800KB
2. i18n: 只同步加载en语言包，其他8种语言改为异步加载，首屏减少约350~400KB
3. 使用vue-i18n的setLocaleMessage API动态注册语言包
4. 新增switchLocale函数统一处理语言切换
5. 同步更新相关测试文件的mock路径和API适配

* 修复类型断言

packages/client/src/components/hermes/chat/highlight.ts

@@ -1,6 +1,62 @@
-import hljs from 'highlight.js'
+import hljs from 'highlight.js/lib/core'
+import bash from 'highlight.js/lib/languages/bash'
+import c from 'highlight.js/lib/languages/c'
+import cpp from 'highlight.js/lib/languages/cpp'
+import csharp from 'highlight.js/lib/languages/csharp'
+import css from 'highlight.js/lib/languages/css'
+import diff from 'highlight.js/lib/languages/diff'
+import go from 'highlight.js/lib/languages/go'
+import xml from 'highlight.js/lib/languages/xml'
+import java from 'highlight.js/lib/languages/java'
+import javascript from 'highlight.js/lib/languages/javascript'
+import json from 'highlight.js/lib/languages/json'
+import kotlin from 'highlight.js/lib/languages/kotlin'
+import lua from 'highlight.js/lib/languages/lua'
+import markdown from 'highlight.js/lib/languages/markdown'
+import php from 'highlight.js/lib/languages/php'
+import python from 'highlight.js/lib/languages/python'
+import r from 'highlight.js/lib/languages/r'
+import ruby from 'highlight.js/lib/languages/ruby'
+import rust from 'highlight.js/lib/languages/rust'
+import scss from 'highlight.js/lib/languages/scss'
+import shell from 'highlight.js/lib/languages/shell'
+import sql from 'highlight.js/lib/languages/sql'
+import swift from 'highlight.js/lib/languages/swift'
+import typescript from 'highlight.js/lib/languages/typescript'
+import yaml from 'highlight.js/lib/languages/yaml'
+import plaintext from 'highlight.js/lib/languages/plaintext'
 import { copyToClipboard } from '@/utils/clipboard'
 
+hljs.registerLanguage('bash', bash)
+hljs.registerLanguage('c', c)
+hljs.registerLanguage('cpp', cpp)
+hljs.registerLanguage('csharp', csharp)
+hljs.registerLanguage('css', css)
+hljs.registerLanguage('diff', diff)
+hljs.registerLanguage('go', go)
+hljs.registerLanguage('xml', xml)
+hljs.registerLanguage('html', xml)
+hljs.registerLanguage('java', java)
+hljs.registerLanguage('javascript', javascript)
+hljs.registerLanguage('js', javascript)
+hljs.registerLanguage('json', json)
+hljs.registerLanguage('kotlin', kotlin)
+hljs.registerLanguage('lua', lua)
+hljs.registerLanguage('markdown', markdown)
+hljs.registerLanguage('php', php)
+hljs.registerLanguage('python', python)
+hljs.registerLanguage('r', r)
+hljs.registerLanguage('ruby', ruby)
+hljs.registerLanguage('rust', rust)
+hljs.registerLanguage('scss', scss)
+hljs.registerLanguage('shell', shell)
+hljs.registerLanguage('sql', sql)
+hljs.registerLanguage('swift', swift)
+hljs.registerLanguage('typescript', typescript)
+hljs.registerLanguage('ts', typescript)
+hljs.registerLanguage('yaml', yaml)
+hljs.registerLanguage('plaintext', plaintext)
+
 const LANGUAGE_ALIASES: Record<string, string> = {
   shellscript: 'bash',
   sh: 'bash',

packages/client/src/components/layout/LanguageSwitch.vue

@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { useI18n } from 'vue-i18n'
 import { NSelect } from 'naive-ui'
+import { switchLocale } from '@/i18n'
 
 const { locale } = useI18n()
 
@@ -16,7 +17,8 @@ const options = [
   { label: 'Português', value: 'pt' },
 ]
 
-function handleChange(val: string) {
+async function handleChange(val: string) {
+  await switchLocale(val)
   locale.value = val
   localStorage.setItem('hermes_locale', val)
 }