适配自定义模板字符串

如果改了 vue 默认的模板字符串 [Vue.config.delimiters](https://cn.vuejs.org/api/#delimiters)，模板中的 `{{ }}` 就用不了了。

Start by reproducing the issue with Vue.config.delimiters set to a custom pair, then inspect the Vue component templates that still use `{{ }}`. Confirm which templates fail and trace how their delimiters are handled. Done means the components render correctly with the configured delimiters, with regression coverage if the repository has relevant tests.

Rédigé par le modèle d'indexation à partir du texte de l'issue.