Runs are timed from ComfyUI's execution events and kept in runs.json (last
500), so ETAs survive restarts and a workflow's timings can be cleared. The
Server tab shows the last 5 runs and a History window; the floating card is
a bigger timer with a clear button, docked to the left of the Server card.
Floating cards share one base (float.js) with magnet docking; docked cards
stack in the corner. Durations come from ComfyUI's history timestamps, the
start of the current run from the execution_start event.
Edouard Durand