fix(artifact): drop userFacingName override so display matches /artifacts

Author: claude-code-best

src/commands/artifacts/index.ts

@@ -6,7 +6,6 @@ const artifacts = {
   description:
     'List HTML artifacts uploaded to cloud-artifacts in this session',
   isEnabled: () => true,
-  userFacingName: () => 'Artifacts',
   load: () => import('./artifacts.js'),
 } satisfies Command