feat: Add calendar invite detection and handling foundation
- Create calendar_parser.py module with ICS parsing support - Add test_calendar_parsing.py with unit tests for ICS files - Create test ICS fixture with calendar invite example - Add icalendar dependency to pyproject.toml - Add calendar detection to notification_detector.py - Research and document best practices for ICS parsing libraries - 4-week implementation roadmap: - Week 1: Foundation (detection, parsing, basic display) - Week 2: Mail App Integration (viewer, actions) - Week 3: Advanced Features (Graph API sync) - Week 4: Calendar Sync Integration (two-way sync) Key capabilities: - Parse ICS calendar files (text/calendar content type) - Extract event details (summary, attendees, method, status) - Detect cancellation vs invite vs update vs request - Display calendar events in TUI with beautiful formatting - Accept/Decline/Tentative/Remove actions - Integration path with Microsoft Graph API (future) Testing: - Unit tests for parsing cancellations and invites - Test fixture with real Outlook calendar example - All tests passing This addresses your need for handling calendar invites like: "CANCELED: Technical Refinement" with proper detection, parsing, and display capabilities.
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