Tasks created in Thunderbird via CalDAV were not visible because
getCalendarTasks() used a strict @type === 'Task' check. Stalwart
may not set @type when converting VTODO from CalDAV to JMAP.
- Use case-insensitive @type matching for server variations
- Add fallback heuristic: detect tasks by presence of 'progress'
property (exclusive to JSCalendar Task, never on Event objects)
- Normalize @type to 'Task' on detected tasks for consistent
downstream handling
- Refresh task store on CalendarEvent state changes so tasks
created externally appear without manual page refresh
Fixes#84
Linus Rath
0c1f182b6b