feat: Add focus style in the tool approval modal

[gary149]

Probably something that can be improved: I always press Enter when this modal appears, thinking that the 'Always allow' option is selected. Adding focus styles might help here.

[urmauur]

@gary149 Thanks for the feedback! That’s a great point. We can definitely improve the user experience with this!

[louis-jan]

@urmauur It would be great to see tool request parameters in this dialog as well.