fix: filter same-name docs from tree display, keep in externalDocs for folder click

src/components/ApiDocViewer.tsx

@@ -71,7 +71,15 @@ export const ApiDocViewer = ({ onDocsPathChange, showAddModal, onCloseAddModal }
       
       setExternalDocs(docs)
       
-      const fileList = docs.map(d => d.relativePath)
+      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
+        })
+        .map(d => d.relativePath)
       const tree = buildFileTree(fileList, '/')
       setFileTree(tree)