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Chosen quiet footer treatment for a future release-check feature. It points users to release notes without interrupting ComfyUI work or stealing space from the main sidebar lists. The notice uses the normal user-facing empty footer slot; the dev build line is omitted because normal users will not see it.
Footer Slot Text
Discreet release notice at the bottom of the sidebar, using the footer slot instead of adding another row.
Lowest visual weight. This is the closest match if we want the notice to live where the hidden dev footer would otherwise be.