Saves move from the page to a store (api/workflow_saves.py), a group for each
canvas, found by a key in the workflow's extra or by its file, and go into
backups. The bar follows the open tab. A save's runs are named to the server, which
finds their pictures in ComfyUI's history, so a reload during a run loses nothing.
A save opens above the bar with what it made and what changed; removing one goes to
the Recycle Bin, and a group past its most takes no more and drops nothing.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
