Bug: pubkeyToHexColor throws on empty string, crashing template rendering

[Priyanshubhartistm]

Description

pubkeyToHexColor throws an Error when pubkey is an empty string. This function is called directly inside component template expressions (e.g., style="background-color: {pubkeyToHexColor(pubkey)}"). If the pubkey hasn't loaded yet, the component crashes.

File: src/lib/utils.nostr.ts

Affected Code

export function pubkeyToHexColor(pubkey: string): string {
  if (!pubkey) {
    throw new Error('Pubkey is required'); //  throws inside templates
  }
  return `#${pubkey.slice(0, 6)}`;
}