fix(sidebar): add correct node identity to heading set

src/components/Sidebar.tsx

@@ -35,29 +35,14 @@ const SidebarContent: Component<SidebarContentProps> = (props) => {
       props.pathHeadings[pathname] || props.pathHeadings[`${pathname}.md`] || []
     );
   });
-  const revealedHeadings = createMemo(() => {
-    const pathname = decodeURIComponent(location.pathname);
-    const set = new Set<string>();
-    function traverse(node: TocNode, cb: (node: TocNode) => void) {
-      cb(node);
-      node.children?.forEach((child) => traverse(child, cb));
-    }
-    for (const node of currentFileHeadings()) {
-      traverse(node, (anode) => {
-        if (isPathRevealed(pathname, anode.id ?? anode.title)) {
-          traverse(anode, (each) => set.add(anode.id ?? anode.title));
-        }
-      });
-    }
-    return set;
-  });
   const isFileHidden = (node: FileNode): boolean => {
     if (isPathRevealed(node.path)) return false;
     if (node.children?.some((child) => !isFileHidden(child))) return false;
     return true;
   };
   const isHeadingHidden = (node: TocNode): boolean => {
-    if (revealedHeadings().has(node.id ?? node.title)) return false;
+    const pathname = decodeURIComponent(location.pathname);
+    if (isPathRevealed(pathname, node.id ?? node.title)) return false;
     if (node.children?.some((child) => !isHeadingHidden(child))) return false;
     return true;
   };