[BUG] mermaid 需要显示错误信息

### Describe the bug . ### Expected behavior _No response_ ### To Reproduce 1. Go to '...' 2. Click on '....' 3. Scroll down to '....' 4. See error ### Screenshots _No response_ ### Configuration - Version [e.g. v5.1.24] - Saving mechanism [e.g. Node.js, TiddlyDesktop, TiddlyHost etc] - Plugins installed [e.g. Freelinks, TiddlyMap] ### Desktop (please complete the following information): - OS: [e.g. iOS] - Browser [e.g. chrome, safari] - Version [e.g. 22] ### Smartphone (please complete the following information): - Device: [e.g. iPhone6] - OS: [e.g. iOS8.1] - Browser [e.g. stock browser, safari] - Version [e.g. 22] ### Additional context _No response_