🐛(frontend) avoid full doc-tree reload on drag-and-drop move

Moving a doc via drag-and-drop already applies the move locally through
`treeData.handleMove`, but `useMoveDoc`'s `onSuccess` also
invalidated the `KEY_DOC_TREE` query, which `useDocTree`
reacts to by nulling `treeContext.root` and forcing the whole tree to
refetch and remount. Add a `skipTreeInvalidation`
option so the drag-and-drop handler can skip that invalidation
and rely on its own local update, while other callers (e.g. the
move modal) keep reloading the tree as before.

src/frontend/apps/impress/src/features/docs/doc-management/api/useMoveDoc.tsx

@@ -15,6 +15,7 @@ export type MoveDocParam = {
   sourceDocumentId: string;
   targetDocumentId: string;
   position: TreeViewMoveModeEnum;
+  skipTreeInvalidation?: boolean;
 };
 
 export const moveDoc = async ({
@@ -48,7 +49,9 @@ export function useMoveDoc(options?: UseMoveDocOptions) {
     onSuccess(data, variables, onMutateResult, context) {
       void queryClient.invalidateQueries({ queryKey: [KEY_LIST_DOC] });
       void queryClient.invalidateQueries({ queryKey: [KEY_DOC] });
-      void queryClient.invalidateQueries({ queryKey: [KEY_DOC_TREE] });
+      if (!variables.skipTreeInvalidation) {
+        void queryClient.invalidateQueries({ queryKey: [KEY_DOC_TREE] });
+      }
 
       if (options?.onSuccess) {
         void options.onSuccess(data, variables, onMutateResult, context);

src/frontend/apps/impress/src/features/docs/doc-tree/components/DocTreeSubpages.tsx

@@ -58,6 +58,7 @@ export const DocTreeSubpages = memo(function DocTreeSubpages({
         sourceDocumentId: result.sourceId,
         targetDocumentId: result.targetModeId,
         position: result.mode,
+        skipTreeInvalidation: true,
       });
 
       treeContext?.treeData.handleMove(result);