The amber "auto-picked" warning persisted even after the user explicitly
picked a branch via the picker — the resort flow only updated the message
text from "auto-picked X" to "selected X" but kept the warning visible.
That reads as "you should review this" when in fact the user already did.
Now: when /api/resort honors a user's explicit branch selection, the
matching auto-picked-branch warning is dropped from WARNINGS. The
BranchPicker in the ModTable expansion (sortof-app.jsx ~818) keeps the
picker accessible if the user wants to switch branches later.
Initial /api/sort still emits the warning (the user hasn't picked yet);
suppression only kicks in once selected_modids honors a group's pick.