Custom JavaScript fields for dynamic content generation

I'd request a feature that allows users to define custom dynamic fields using JavaScript (or other scripting languages).

Currently, Mochi offers some very helpful built-in dynamic fields, but I'd like to be able to define my own logic. For example:

• send custom API requests
• perform custom string manipulation (e.g., regex parsing, transformations)
• randomize the order of the content every time I review

What I'm envisioning is similar to how the current "AI text generator" field works: a field in the template editor where I can input JavaScript code that takes the field value(s) as input and returns a modified string.

Since script tags aren't rendered in Mochi's HTML, this kind of functionality would be a powerful workaround and enable highly customized workflows.

Of course, I understand there are security concerns with allowing arbitrary code execution. But even a limited, sandboxed environment (like Web Workers or a subset of JavaScript) would be helpful for users who want to fully customize their experience!