validateIpOrDomain does too many things, is used in too many places and currently doesn't work in all of them.

• ipv4 validation with/without mask and with/without port
• ipv6 validation with/without mask and with/without port
• domain validation with/without port

On top of that domain validation regex includes ports too, so it's not possible to validate "domain without port".

Solution

Split the existing validator into a set of single-responsibility validators:

• ipv4
• ipv4WithPort
• ipv6
• ipv6WithPort
• cidrv4
• cidrv6
• domain
• domainWithPort

These can then be composed directly in Zod schemas to construct the exact validation behavior needed for each field.

While working on this issue, please also setup a unit-testing framework for the frontend and implement unit-tests for the validators.