Describe the bug

Have a look at screenshot below. The text is unreadable.

Steps to reproduce

1. Enable dark theme
2. Use below mermaid diagram and view it for yourself

sequenceDiagram
    Alice->>+John: Hello John, how are you?
    Alice->>+John: John, can you hear me?
    John-->>-Alice: Hi Alice, I can hear you!
    John-->>-Alice: I feel great!

The version of Memos you're using

latest

Screenshots or additional context

No response