refactor: Simplify folder ancestor expansion logic and refine onCreateFolder parentId type.

frontend/src/documents/hooks/useDocumentsPanelProps.ts

@@ -229,7 +229,6 @@ const useDocumentsPanelProps = (props: UseDocumentsPanelPropsArgs) => {
       selectFolder,
       tagLookupById,
       activeTagFilters,
-      activeCorrespondentFilters,
       tags,
       ensureAssetUrl,
       getDocumentAsset,

frontend/src/hooks/documents/useFolderTree.ts

@@ -170,38 +170,25 @@ const useFolderTree = ({
     ],
   );
 
-  const expandFolderAncestors = useCallback((targetId: FolderId | null, options: { includeSelf?: boolean } = {}) => {
-    const { includeSelf = true } = options;
+  const expandFolderAncestors = useCallback((targetId: FolderId | null) => {
     if (!targetId || targetId === 'root') {
-      setFolderNodes((prev: Map<FolderId, FolderTreeNode>) => {
-        const root = prev.get('root');
-        if (!root || root.expanded) return prev;
-        const next = new Map<FolderId, FolderTreeNode>(prev);
-        next.set('root', { ...root, expanded: true });
-        return next;
-      });
       return;
     }
 
     setFolderNodes((prev: Map<FolderId, FolderTreeNode>) => {
       const next = new Map<FolderId, FolderTreeNode>(prev);
-      let currentId = targetId;
+      const node = next.get(targetId);
+      let currentId = node?.parentId ?? 'root';
       let guard = 0;
 
-      // If not including self, start from parent
-      if (!includeSelf) {
-        const node = next.get(currentId);
-        currentId = node?.parentId ?? 'root';
-      }
-
       while (currentId && guard < 32) {
         guard += 1;
-        const node = next.get(currentId);
-        if (!node) break;
-        if (!node.expanded) {
-          next.set(currentId, { ...node, expanded: true });
+        const currentNode = next.get(currentId);
+        if (!currentNode) break;
+        if (!currentNode.expanded) {
+          next.set(currentId, { ...currentNode, expanded: true });
         }
-        currentId = node.parentId ?? 'root';
+        currentId = currentNode.parentId ?? 'root';
       }
       return next;
     });

frontend/src/hooks/documents/useFolderTreeActions.ts

@@ -250,7 +250,7 @@ const useFolderTreeActions = ({
       const targetId = folderId && folderId !== 'root' ? folderId : 'root';
 
       await ensureFolderAncestorsLoaded(targetId);
-      expandFolderAncestors(targetId, { includeSelf: false });
+      expandFolderAncestors(targetId);
 
       if (!navigate || immediate) {
         await loadFolder(targetId, { preserveSearch: isFilterActive });

frontend/src/sidebar/Sidebar.tsx

@@ -30,7 +30,7 @@ interface SidebarProps {
   onFolderDragStart?: (event: React.DragEvent<HTMLDivElement>, folderId: FolderIdentifier) => void;
   onFolderDragEnd?: (event: React.DragEvent<HTMLDivElement>) => void;
   draggedFolderId?: FolderIdentifier | null;
-  onCreateFolder?: (parentId?: Identifier | null) => void;
+  onCreateFolder?: (parentId?: FolderIdentifier | null) => void;
   creatingFolder?: boolean;
   tags?: TagEntry[];
   untaggedFilterId?: Identifier | null;