Each PSU is its own card, coloured by its own status — a failed unit goes red on its own instead of dragging a single grouped card down — and shows input voltage + draw (measured output/input, else nameplate rating). Cards click through to the PSU detail modal and carry data-psu so the shared topoLiveScript refreshes their wattage from /api/metrics/latest on the same 5s poll as the fan tiles. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019VHG21rgTUiR1G3qFHTVmN