Add an Update from ComfyUI entry to the workflow card context menu,
enabled only when the workflow is the active graph in a connected
ComfyUI tab and carries unsaved edits.
ComfyUI side (workflow_writeback.js): the first graphChanged after a
load/write-back flips a dirty flag inside the extra.lm_source marker
(ChangeTracker only dispatches on real state changes); the active
graph's link state (file_path, sha256, dirty) is reported to
POST /api/lm/workflows/comfyui-state on load, tab switch, dirty flip
and write-back. A new lm_collect_workflow WS handler answers LM-page
write-back requests: it reuses the regular PUT content flow and posts
the outcome to /api/lm/workflows/collect-result.
Backend: an in-memory WorkflowLinkRegistry holds per-client link states
(pruned against live websocket sids) and pending collect futures;
POST /api/lm/workflows/update-from-comfy targets the tab holding the
requested file (dirty holders win) and awaits the collect result,
mapping no_changes/cancelled to 200, timeout to 504.
Will Miao
fa774de9ea