fix: filter depth >= 3 from tree display

src/components/ApiDocViewer.tsx

@@ -72,13 +72,7 @@ export const ApiDocViewer = ({ onDocsPathChange, showAddModal, onCloseAddModal }
       setExternalDocs(docs)
       
       const fileList = docs
-        .filter(doc => {
-          const parts = doc.relativePath.split('/')
-          if (parts.length < 2) return true
-          const filename = parts[parts.length - 1].replace(/\.md$/, '')
-          const parentFolder = parts[parts.length - 2]
-          return filename !== parentFolder
-        })
+        .filter(doc => doc.relativePath.split('/').length < 3)
         .map(d => d.relativePath)
       const tree = buildFileTree(fileList, '/')
       setFileTree(tree)