npanel: wss/https (relay/blossom) urls should auto add protocol and thus dedupe

already there was `compass-relay.samt.st` but yet I could add `wss://compass-relay.samt.st`

<img width="973" height="578" alt="Image" src="https://github.com/user-attachments/assets/8dce2a06-3777-4e9b-a78a-e80b68536d2d" />