Add some plus/minus buttons around some number input fields

For number inputs like quantities it would be nice to have some buttons around it to quicky +/- 1 ?

Perhaps having also buttons to +/- 5/10/100 would make updating stock or entering new orders easier.

like that:

<img width="320" height="240" alt="Image" src="https://github.com/user-attachments/assets/ea8f6c75-5f0e-42cd-9349-329acfbd6d3b" />