- Created czech-holidays.ts with 11 fixed + 2 Easter-based holidays
- Fund now automatically excludes public holidays (no manual records needed)
- covered = worked + vacation + sick (NOT holidays — already in fund)
- Renamed "Odpracováno" to "Pokryto" (worked + leave = what counts)
- Removed dependency on holiday attendance records per employee
Matches PHP CzechHolidays::getMonthlyWorkFund() logic exactly.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
