Events created in external CalDAV clients (like AgendaV) with timezone information
were showing incorrect times due to improper timezone handling. Fixed by:
- Enhanced datetime parser to extract TZID parameters from iCal properties
- Added proper timezone conversion from source timezone to UTC using chrono-tz
- Preserved full property strings with parameters during parsing
- Maintained backward compatibility with existing UTC format events
This resolves the issue where events created at 9 AM Mountain Time were
displaying as 5 AM instead of the correct 11 AM Eastern Time.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
393bfecff2