Stage 77 — PWA Privacy & Data Controls

This package is deployment-safe for the existing installation. The Stage 77 test can repair missing Stage 77 privacy assets in the detected application root, then verifies all 8 checks.

Upload/extract over the existing installation and test:
https://ieduportal.com/school-management-system/upgrade/stage77.php

After Stage 77 passes, delete upgrade/stage77.php.
No database changes.
