fix: terminal trace tree view

Author: cristipufu

src/uipath/_cli/_dev/_terminal/_components/_details.py

@@ -292,7 +292,8 @@ def _show_run_details(self, run: ExecutionRun):
     def _rebuild_spans_tree(self):
         """Rebuild the spans tree from current run's traces."""
         spans_tree = self.query_one("#spans-tree", Tree)
-        spans_tree.clear()
+        spans_tree.root.remove_children()
+
         # Only clear the node mapping since we're rebuilding the tree structure
         self.span_tree_nodes.clear()