v1.0.3

Summary

This pull request merges all completed features and infrastructure updates for v1.0.3.

Highlights

Features

• Added support for [todo], [inProgress], [done] task status markers
• Role-based visualisation using shape: start, middle, end
• Status filter via multiselect in Streamlit UI
• Save and load task graphs as timestamped JSON files

Testing

• test_core.py added with full coverage of core parsing functions
• test_io.py added for save_tasks and load_tasks using temporary filesystem
• Introduced pytest.ini for Python path consistency

UI

• Streamlit visual and layout refinements
• Dual legends for node status and role