diff --git a/backend/app/tasks/scan.py b/backend/app/tasks/scan.py
index 78f67b4..7f533e2 100644
--- a/backend/app/tasks/scan.py
+++ b/backend/app/tasks/scan.py
@@ -641,9 +641,18 @@ async def handle_directory_rename(old_dirpath: str, new_dirpath: str) -> dict:
                 )
             )
         )).scalars().all()
+        # Path is load-bearing (FKs join on it implicitly via filepath),
+        # name is purely display. The renamed folder itself gets its
+        # leaf basename refreshed too so the sidebar tree doesn't show
+        # stale text. Descendant folders keep their existing name
+        # because the rename was on the ancestor — only the path changes.
+        new_basename = os.path.basename(new_prefix)
         for f in folders:
-            f.path = new_prefix if f.path == old_prefix else \
-                new_prefix + f.path[len(old_prefix):]
+            if f.path == old_prefix:
+                f.path = new_prefix
+                f.name = new_basename
+            else:
+                f.path = new_prefix + f.path[len(old_prefix):]
 
         source_roots = (await session.execute(
             select(SourceRoot).where(SourceRoot.path == old_prefix)