finish refactor pre merge

lib/useEditorState.ts

@@ -20,9 +20,11 @@ export type { Change, UndoAction } from "@/lib/editor/draft/editorTypes";
 export function useEditorState(initialData: FeatureCollection) {
     const { draft, draftRef, commitDraft, resetDraft } = useDraftState(initialData);
 
+    // Map baseline (id -> feature) để diff draft hiện tại ra changes.
     const initialMapRef = useRef<Map<FeatureProperties["id"], Feature>>(
         buildInitialMap(initialData)
     );
+    // Version counter để ép diff recalculation sau khi reset/clear baseline.
     const [baselineVersion, setBaselineVersion] = useState(0);
 
     const applyUndoAction = useCallback((action: UndoAction): boolean => {