it should be possible to add an own popup to the unit editor for special units, see for rotation in dev tools: <img width="183" height="121" alt="Image" src="https://github.com/user-attachments/assets/9f773b4b-bd1b-4003-b45d-bc1abc530b21" /> or <img width="345" height="172" alt="Image" src="https://github.com/user-attachments/assets/76a6e0f5-e59f-43c5-b492-0d0112fb553b" />
it should be possible to add an own popup to the unit editor for special units, see for rotation in dev tools:
or