Validation completed on 2026-08-03 for Complete Installer v3

- PHP syntax validation passed for install.php and all 11 payload PHP files.
- Confirmed the installer manifest contains every payload PHP file exactly once.
- Confirmed the complete installer still includes all attendance, teacher-dashboard, exam privacy, anti-cheating, forced timer submission, attempt reset/private retake and closed-exam visibility fixes from v2.
- Confirmed teacher and admin session pages both expose a 5-session Sunday–Thursday option.
- Confirmed teacher and admin session pages both expose a 20-session option covering four Sunday–Thursday academic weeks.
- Confirmed date generation always uses only Sunday, Monday, Tuesday, Wednesday and Thursday and never generates Friday or Saturday.
- Confirmed a non-Sunday selected date is normalized to the following Sunday; selecting Sunday keeps that same Sunday.
- Confirmed all generated sessions copy the same time, Zoom link, lesson/material link and teacher notes.
- Confirmed every generated session is inserted as an independent core_sessions row and remains editable through the existing per-session update form.
- Confirmed duplicate course/date/time rows are skipped safely instead of being inserted again.
- Confirmed teacher and admin batch creation use database transactions and roll back on failure.
- Confirmed admin batch creation requires the selected course to have an assigned teacher.
- Confirmed the obsolete seven-consecutive-session batch action and UI were removed.
- Confirmed installer version marker is 2026.08.03-critical-fixes-v3.
- Installer creates a file backup before replacement and restores it automatically if installation fails.
- Installer includes a manual file rollback action.

Runtime verification still requires the hosting MySQL database and real admin, teacher and student accounts.
