diff --git a/app/tree/environment.py b/app/tree/environment.py
index 4656fbf..ca9d7bf 100644
--- a/app/tree/environment.py
+++ b/app/tree/environment.py
@@ -354,11 +354,13 @@ class TreeEnvironment:
             desc = _node_description(child)
             if len(desc) > 120:
                 desc = desc[:120] + "..."
-            result.append({
-                "id": child.id,
-                "time_range": self._format_time_range(child),
-                "summary": desc,
-            })
+            result.append(
+                {
+                    "id": child.id,
+                    "time_range": self._format_time_range(child),
+                    "summary": desc,
+                }
+            )
         return result
 
     def get_subtitle(self, node_id: str) -> str: