- Remove duplicate step definitions from tui_persona_cycle_steps.py that
conflicted with tui_persona_system_steps.py (a temporary TUI persona
registry, set active persona, active persona assertions)
- Fix unquoted step parameter in @then step to use quoted {persona_name}
matching the feature file syntax
- Add docstrings to export_persona, import_persona, load_state, save_state,
get_last_persona, set_last_persona in registry.py
- Add docstrings to active_name, active_persona, set_active_persona,
current_preset in state.py
- Add CHANGELOG entry for PersonaRegistry and PersonaState.cycle_persona()
ISSUES CLOSED: #5314