Per-row START button enabled iff `installed && status !== 'ok'`;
tooltip explains why it's disabled ("Unit not installed" /
"Already running"). Transient `starting` state shows `...` on the
button and auto-clears after 15s so the UI never gets stuck if the
heartbeat is slow.
START ALL WORKERS button in the header calls /workers/start-all and
renders the three counts in the toast:
`STARTED · N · ALREADY RUNNING · M · FAILED · K (first failure: …)`.
Tone flips to alert when K > 0.
anti
49a6a674e6