v2.2.15

Fixed

• Dashboard, hosts, VMs, containers, and guest detail keep their data when a poll fails and show a soft retry banner instead of wiping the page.
• Guest power actions track busy rows per guest (no cross-clear race) and stay disabled while a start/shutdown/reboot/stop is pending.
• Host “Test” and maintenance “End” block double clicks. Network errors use the localized message. Empty VM/CT/storage sections on a host show a short empty state.