Since RTT history keys make host.plugin_data non-empty after the very
first heartbeat, the "no hosts" empty state can now only trigger when
zero hosts have ever connected, not when hosts exist but haven't sent
plugin metrics yet (that in-between state no longer exists). Update
the copy to describe the actual current trigger condition.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DEimzMv4Q5EjFg3hoiZ69T