status shows empty '(target: )' when no target is configured

[jariy17]

Summary

agentcore status renders an empty target label (target: ) in the header when no deployment target is configured. Should either omit the label or show a default.

Reproducer

agentcore create --name Test --defaults --skip-install --skip-git --skip-python-setup --json
cd Test
agentcore status

Actual behavior

AgentCore Status (target: )

Expected behavior

Either:

• AgentCore Status (omit target when empty)
• AgentCore Status (target: default) (show default label)

Version

agentcore 0.10.0-1777085255