fix: 抽离update hook

src/hooks/index.ts

@@ -1,3 +1,3 @@
-export * from '@/hooks/theme.hook'
-export * from '@/hooks/previewScale.hook'
-export * from '@/hooks/code.hook'
+export * from '@/hooks/useTheme.hook'
+export * from '@/hooks/usePreviewScale.hook'
+export * from '@/hooks/useCode.hook'

src/hooks/useCode.hook.ts

@@ -2,7 +2,7 @@ import hljs from 'highlight.js/lib/core'
 import json from 'highlight.js/lib/languages/json'
 import typescript from 'highlight.js/lib/languages/typescript'
 
-export const useHook = () => {
+export const useCode = () => {
   hljs.registerLanguage('json', json)
   hljs.registerLanguage('typescript', typescript)
   return hljs