Code complexity review

[IanMayo]

We have some quite large modules.

I suspect we also have some quite complex blocks of logic.

Do a code review, to consider hot-spots where:

• UI and business logic are too tightly intertwined
• Business logic is several layers deep
• Child components could be refactored out
• UI elements could be refactored to Lit components
• Files are very large (over 400 lines)

Produce a report of recommendations