feat: student mode support for thanks page (admin-auth only)

- add hidden student_mode field in add.php form
- pass mode=student through redirect to thanks.php in formulaire.php
- thanks.php renders clean student thank-you page (no header, centered button)
- add CSS for .thanks-student-page, .btn-new-form, .thanks-success, .thanks-error
- admin auth always required; student mode is purely UI variant on the physical machine
This commit is contained in:
Pontoporeia
2026-04-15 13:49:25 +02:00
parent c3affd2285
commit f4aba500e6
7 changed files with 254 additions and 81 deletions

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