chore: apply ruff auto-fixes and remove dead AST scripts

tests/test_history_management.py

@@ -1,10 +1,8 @@
-import pytest
 import sys
 import os
 import tomli_w
 import tomllib
 from pathlib import Path
-from unittest.mock import MagicMock
 
 # Ensure project root is in path for imports
 sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
@@ -23,7 +21,7 @@ def test_aggregate_includes_segregated_history(tmp_path: Path) -> None:
     when it's segregated into a separate file.
     """
  proj_path = tmp_path / "manual_slop.toml"
- hist_path = tmp_path / "manual_slop_history.toml"
+ tmp_path / "manual_slop_history.toml"
  # Setup segregated project configuration
  proj_data = project_manager.default_project("test-aggregate")
  proj_data["discussion"]["discussions"]["main"]["history"] = ["@2026-02-24T14:00:00\nUser:\nShow me history"]