feat(web): persist file tree expansion and add column visibility callbacks

Save expanded file tree paths to localStorage so they survive page reloads, and surface an onColumnVisibilityChanged callback from DataTable/ObjectTable.

apps/web/app/components/workspace/data-table.tsx

@@ -60,6 +60,7 @@ export type DataTableProps<TData, TValue> = {
 	enableColumnReordering?: boolean;
 	onColumnReorder?: (newOrder: string[]) => void;
 	initialColumnVisibility?: VisibilityState;
+	onColumnVisibilityChanged?: (visibility: VisibilityState) => void;
 	// pagination
 	pageSize?: number;
 	// actions
@@ -173,6 +174,7 @@ export function DataTable<TData, TValue>({
 	enableColumnReordering = false,
 	onColumnReorder,
 	initialColumnVisibility,
+	onColumnVisibilityChanged,
 	pageSize: defaultPageSize = 100,
 	onRefresh,
 	onAdd,
@@ -345,7 +347,11 @@ export function DataTable<TData, TValue>({
 		onSortingChange: setSorting,
 		onGlobalFilterChange: setGlobalFilter,
 		onColumnFiltersChange: setColumnFilters,
-		onColumnVisibilityChange: setColumnVisibility,
+		onColumnVisibilityChange: (updater) => {
+			const next = typeof updater === "function" ? updater(columnVisibility) : updater;
+			setColumnVisibility(next);
+			onColumnVisibilityChanged?.(next);
+		},
 		onRowSelectionChange: (updater) => {
 			if (onRowSelectionChange) {
 				onRowSelectionChange(updater);

apps/web/app/components/workspace/file-manager-tree.tsx

@@ -716,8 +716,27 @@ function flattenVisible(tree: TreeNode[], expanded: Set<string>): TreeNode[] {
 
 // --- Main Exported Component ---
 
+const STORAGE_KEY = "denchclaw-tree-expanded";
+
+function loadExpandedPaths(): Set<string> {
+  try {
+    const raw = window.localStorage.getItem(STORAGE_KEY);
+    if (raw) {
+      const arr = JSON.parse(raw) as string[];
+      if (Array.isArray(arr)) return new Set(arr);
+    }
+  } catch { /* ignore corrupt data */ }
+  return new Set();
+}
+
+function saveExpandedPaths(paths: Set<string>) {
+  try {
+    window.localStorage.setItem(STORAGE_KEY, JSON.stringify([...paths]));
+  } catch { /* storage full or unavailable */ }
+}
+
 export function FileManagerTree({ tree, activePath, onSelect, onRefresh, compact, parentDir, onNavigateUp, browseDir: _browseDir, workspaceRoot, onExternalDrop }: FileManagerTreeProps) {
-  const [expandedPaths, setExpandedPaths] = useState<Set<string>>(() => new Set());
+  const [expandedPaths, setExpandedPaths] = useState<Set<string>>(() => loadExpandedPaths());
   const [selectedPath, setSelectedPath] = useState<string | null>(null);
   const [renamingPath, setRenamingPath] = useState<string | null>(null);
   const [dragOverPath, setDragOverPath] = useState<string | null>(null);
@@ -771,21 +790,10 @@ export function FileManagerTree({ tree, activePath, onSelect, onRefresh, compact
 
   const containerRef = useRef<HTMLDivElement>(null);
 
-  // Auto-expand first level on mount.
-  // Keep ~skills and ~memories collapsed by default; always expand ~chats.
-  const collapsedByDefault = new Set(["~skills", "~memories"]);
+  // Persist expanded paths to localStorage whenever they change
   useEffect(() => {
-    if (tree.length > 0 && expandedPaths.size === 0) {
-      const initial = new Set<string>();
-      for (const node of tree) {
-        if (collapsedByDefault.has(node.path)) {continue;}
-        if (node.children && node.children.length > 0) {
-          initial.add(node.path);
-        }
-      }
-      setExpandedPaths(initial);
-    }
-  }, [tree]);
+    saveExpandedPaths(expandedPaths);
+  }, [expandedPaths]);
 
   const handleToggleExpand = useCallback((path: string) => {
     setExpandedPaths((prev) => {

apps/web/app/components/workspace/object-table.tsx

@@ -50,6 +50,7 @@ type ObjectTableProps = {
 	onRefresh?: () => void;
 	/** Column visibility state keyed by field ID. */
 	columnVisibility?: Record<string, boolean>;
+	onColumnVisibilityChanged?: (visibility: Record<string, boolean>) => void;
 	/** Server-side pagination props. */
 	serverPagination?: ServerPaginationProps;
 	/** Server-side search callback. */
@@ -440,6 +441,7 @@ export function ObjectTable({
 	onEntryClick,
 	onRefresh,
 	columnVisibility,
+	onColumnVisibilityChanged,
 	serverPagination,
 	onServerSearch,
 }: ObjectTableProps) {
@@ -711,6 +713,7 @@ export function ObjectTable({
 			rowActions={getRowActions}
 			stickyFirstColumn
 			initialColumnVisibility={columnVisibility}
+			onColumnVisibilityChanged={onColumnVisibilityChanged}
 			serverPagination={serverPagination}
 			onServerSearch={onServerSearch}
 		/>