1. The duplicate#
The page of the record that will go. Merge sits in the ⋮ menu when the bar is full.
2. The menu#
"Merge into…" among the actions that did not fit the bar.
3. Pick the survivor#
The other cats are offered; the one you pick keeps its values and gets the other's history.
4. Confirm#
A moment is recorded first; the merge itself cannot be undone, so it asks once more.
