perf: only bundle needed shiki langs and themes (#192)

Signed-off-by: ZTL-UwU <zhangtianli2006@163.com>

Author: ZTL-UwU

Diff for: client/components/OCodeBlock.vue

@@ -1,12 +1,11 @@
 <script setup lang="ts">
-import type { BundledLanguage } from 'shiki'
 import { computed } from 'vue'
 import { renderCodeHighlight } from '../composables/shiki'
 
 const props = withDefaults(
   defineProps<{
     code: string
-    lang?: BundledLanguage | 'robots-txt'
+    lang: 'json' | 'html' | 'bash' | 'robots-txt'
     lines?: boolean
     transformRendered?: (code: string) => string
   }>(),

Diff for: client/composables/shiki.ts

@@ -1,22 +1,23 @@
 import type { MaybeRef } from '@vueuse/core'
-import type { BundledLanguage, Highlighter } from 'shiki'
-import { createHighlighter } from 'shiki'
+import type { HighlighterCore } from 'shiki'
+import { createHighlighterCore } from 'shiki/core'
+import { createJavaScriptRegexEngine } from 'shiki/engine/javascript'
 import { computed, ref, toValue } from 'vue'
 import { devtools } from './rpc'
 
-export const shiki = ref<Highlighter>()
+export const shiki = ref<HighlighterCore>()
 
 export async function loadShiki() {
   // Only loading when needed
-  shiki.value = await createHighlighter({
+  shiki.value = await createHighlighterCore({
     themes: [
-      'vitesse-dark',
-      'vitesse-light',
+      import('@shikijs/themes/vitesse-light'),
+      import('@shikijs/themes/vitesse-dark'),
     ],
     langs: [
-      'html',
-      'json',
-      'bash',
+      import('@shikijs/langs/json'),
+      import('@shikijs/langs/html'),
+      import('@shikijs/langs/bash'),
       Object.freeze({
         displayName: 'robots.txt',
         name: 'robots-txt',
@@ -70,11 +71,12 @@ export async function loadShiki() {
         scopeName: 'text.robots-txt',
       }),
     ],
+    engine: createJavaScriptRegexEngine(),
   })
   return shiki.value
 }
 
-export function renderCodeHighlight(code: MaybeRef<string>, lang?: BundledLanguage | 'robots-txt') {
+export function renderCodeHighlight(code: MaybeRef<string>, lang: 'json' | 'html' | 'bash' | 'robots-txt') {
   return computed(() => {
     const colorMode = devtools.value?.colorMode || 'light'
     return shiki.value!.codeToHtml(toValue(code), {