Timetable display mode

Three interchangeable representations of the same lessons on the same timetable, selected with the buttons in the title banner:

• Grid (Grid view): classic calendar view, lessons positioned on a day × time grid. Default mode for quick consultation.
• List (List view): chronological sequence of lessons, one per line, with day, times, duration, class, group, subject, teachers, site and classroom. Convenient for browsing sequentially.
• Table (Table): spreadsheet-style rendering of the current view — days as columns and time slots as rows (or the reverse), or one lesson per row when the list view is active. Useful for an audit, a copy to a spreadsheet, or a file export depending on the screen (PDF, CSV, Excel / XLSX). This mode is restricted to administrators, on a computer.

The three modes operate on the same data set; switching neither modifies nor filters anything, it is strictly a different presentation. The choice is not saved: it applies to the current display.