Stabilize empty-drop tag removal confirmation

Ariver

2026-05-28 da71eb5bccbdbd22da7cd74b6ddcec031f069482

 Apptag/AppGridCollectionView.swift

@@ -339,8 +339,10 @@
        guard let coordinator,
              coordinator.displayStyle != .flat
        else { return }
        DispatchQueue.main.async {
        coordinator.onDropOutsideGroup(path, source, copy)
    }
    }

    private func setup() {
        wantsLayer = true