- Add comprehensive Windows timezone support for global external calendars
- Map Windows timezone names (e.g. "Mountain Standard Time") to IANA zones (e.g. "America/Denver")
- Support 60+ timezone mappings across North America, Europe, Asia, Asia Pacific, Africa, South America
- Add chrono-tz dependency for proper timezone handling
- Fix external calendar event colors by setting calendar_path for color lookup
- Add visual distinction for external calendar events with dashed borders and calendar emoji
- Update timezone parsing to extract TZID parameters from iCalendar DTSTART/DTEND properties
- Pass external calendar data through component hierarchy for color matching
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
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