refactor code to nuxt and add ssr and edit some text in landing

src/themeConfig.ts

@@ -5,6 +5,7 @@ const prefixCls = 'noname'
 const baseButtonIconSize = '24'
 
 function readCachedTenantField(key: string): string {
+  if (!import.meta.client) return ''
   try {
     const cookie = document.cookie.split('; ').find((row) => row.startsWith('APP_CONFIG_CACHE='))
     if (!cookie) return ''