fix(auth): clean up rename and null-owner ownership (#4340)

tests/test_personal_upload_isolation.py

@@ -1,5 +1,6 @@
 import os
 from pathlib import Path
+from types import SimpleNamespace
 
 from routes import personal_routes
 
@@ -42,3 +43,44 @@ def test_personal_upload_paths_stay_under_upload_root(tmp_path, monkeypatch):
     assert os.path.commonpath([file_path, upload_dir]) == upload_dir
     assert Path(file_path).name == stored_name
     assert display_name == "env"
+
+
+def test_rename_personal_upload_owner_moves_files_and_rewrites_rag(tmp_path, monkeypatch):
+    monkeypatch.setattr(personal_routes, "UPLOADS_DIR", str(tmp_path))
+
+    old_dir = Path(personal_routes._personal_upload_dir_for_owner("alice"))
+    old_file = old_dir / "note.txt"
+    old_file.write_text("alice private RAG note", encoding="utf-8")
+
+    manager_calls = []
+    rag_calls = []
+    manager = SimpleNamespace(
+        rename_directory=lambda old, new, path_map=None: manager_calls.append((old, new, dict(path_map or {}))),
+    )
+    rag = SimpleNamespace(
+        rename_owner=lambda old, new, path_map=None, path_prefixes=None: rag_calls.append(
+            (old, new, dict(path_map or {}), list(path_prefixes or []))
+        ) or {"success": True, "updated_count": 1},
+    )
+
+    result = personal_routes.rename_personal_upload_owner(
+        "alice",
+        "alice2",
+        personal_docs_manager=manager,
+        rag_manager=rag,
+    )
+
+    new_dir = Path(personal_routes._personal_upload_dir_for_owner("alice2"))
+    new_file = new_dir / "note.txt"
+    assert old_file.exists() is False
+    assert new_file.read_text(encoding="utf-8") == "alice private RAG note"
+    assert result["moved_files"] == 1
+    assert manager_calls == [(str(old_dir), str(new_dir), {str(old_file): str(new_file)})]
+    assert rag_calls == [
+        (
+            "alice",
+            "alice2",
+            {str(old_file): str(new_file)},
+            [(str(old_dir), str(new_dir))],
+        )
+    ]