feat(AttendanceSheet): refactor attendance flow and fix post-create refresh
- Refactor attendance sheet creation and detail views to rely on UUID-based identifiers for all departments.
- Fix list auto-refresh after creating a new attendance sheet and navigating back from the detail view (not limited to Cher department).
- Align Cher attendance UI and PDF export by using attendanceSheetUuid, consistent date mapping, and correct presence/absence markers.