The Background tab fills in — facets rendered to order, eight hues in a carousel

Claude-Session: https://claude.ai/code/session_01SR4XGjmBE16ZUYWpfFHXwY

Kanban/History/CardWindowUndo.swift

@@ -271,6 +271,8 @@ public final class CardWindowUndo {
             return .path(url.standardizedFileURL)
         }
 
-        private static let fieldOrder: [ExpectedField.Kind] = [.title, .order, .width, .background, .icon, .body]
+        private static let fieldOrder: [ExpectedField.Kind] = [
+            .title, .order, .width, .background, .backgroundImage, .icon, .body,
+        ]
     }
 }