Ignore invalid personal docs state (#1401)

tests/test_personal_docs_state_store.py

@@ -0,0 +1,23 @@
+import json
+
+from src.personal_docs import PersonalDocsManager
+
+
+def test_manager_ignores_invalid_persisted_state_shapes(tmp_path):
+    (tmp_path / "indexed_directories.json").write_text(json.dumps({"bad": "shape"}))
+    (tmp_path / "excluded_files.json").write_text(json.dumps({"bad": "shape"}))
+
+    manager = PersonalDocsManager(str(tmp_path))
+
+    assert manager.indexed_directories == []
+    assert manager.excluded_files == set()
+
+
+def test_manager_filters_invalid_persisted_state_rows(tmp_path):
+    (tmp_path / "indexed_directories.json").write_text(json.dumps(["/tmp/docs", 123]))
+    (tmp_path / "excluded_files.json").write_text(json.dumps(["/tmp/docs/a.txt", None]))
+
+    manager = PersonalDocsManager(str(tmp_path))
+
+    assert manager.indexed_directories == ["/tmp/docs"]
+    assert manager.excluded_files == {"/tmp/docs/a.txt"}