The move/copy destination dialog. Standard modal recipe with data-slot parts; the tree body drops to --field-bg-style --app-bg so rows read as content, not chrome. Rows are 32px, indent is 20px per level, and folder icons are always --yellow-solid. The selected destination holds --list-item-bg-active plus a trailing check; the items’ current location is visible but disabled (aria-disabled, “current” tag) — hiding it would make the tree look wrong. Keyboard: ↑↓ move, → expand, ← collapse, ↵ confirms.