- Added module docstrings to 19 Python files
- Added class docstrings to 5 classes (ScreenLocker, PokerModifierApp, etc.)
- Added method docstrings to 22 methods
- Added function docstrings to 25 functions
- Added __init__ docstrings to 5 classes
- Removed D100-D107 from ruff ignore list (docstrings now enforced)
- Removed deprecated ANN101, ANN102, UP038 rules from ignore list
- Fixed UP038: use union types in isinstance() calls
- All ruff checks now pass with full docstring enforcement