feat(attendance-ui): support department-based sheets and auto-fill from circuit

Make circuit optional in the attendance creation form while keeping department required Automatically pre-fill the department when a circuit is selected using the new admin-service endpoint Route creation to /add when a circuit is provided and to /add-by-department when only a department is selected Render all generated route sheets (per circuit) inside the main attendance tab, including a clear message when a circuit has no students