Merge pull request #17009 from overleaf/ae-file-tree-classname

Remove duplicate className from Angular file tree

GitOrigin-RevId: 238b1ad8631b5a861361113679a9f1f8a66da6ea

services/web/frontend/js/features/file-tree/components/file-tree-root.tsx

@@ -49,7 +49,11 @@ const FileTreeRoot = React.memo<{
   if (!isReady) return null
 
   return (
-    <div className="file-tree" ref={setFileTreeContainer}>
+    <div
+      className="file-tree"
+      data-testid="file-tree"
+      ref={setFileTreeContainer}
+    >
       {fileTreeContainer && (
         <FileTreeContext
           refProviders={refProviders}