[Bug] Formula rendering fails in answers and page freezes when typing `$`

I am using `editor-formula` with Apache Answer. I've encountered two issues:
1. Formulas are not rendered in the answer body, even though they work well in the question body and editor.

2. Typing `$` symbols in the markdown editor causes the entire browser tab to become unresponsive.

**Steps to Reproduce the Freezing:**
Open any question/answer editor and type `$ $$`.

**Environment:**
- Apache Answer: 2.0.0
- editor-formula: 1.2.15
- Browser: Chrome 147 / Firefox 149

首先，在 Apache Answer 2.0.0 的 editor-formula 插件中复现这两种行为：在回答中渲染一个公式，然后在问题或回答编辑器中输入 `$ $$`。跟踪回答正文的渲染路径和 Markdown 编辑器路径；完成的标准是公式能在回答中渲染，并且输入报告的符号不再使 Chrome 或 Firefox 卡死。

由索引模型根据 Issue 内容生成。