use Form component from shadcn/ui

https://ui.shadcn.com/docs/components/form

Let's try it on a simple form and check if it's worth using it and compatible with inertia useForm hook

Read the shadcn/ui Form documentation linked in the issue, then locate a simple form and the existing Inertia useForm usage in the repository. Try the component there and verify whether validation and submission remain compatible; done means the experiment is documented with a clear compatibility result.

Written by the indexing model from the issue text.