# TODO

- [x] Add fixed top gradient on partage main element, mirror of bottom gradient
- [x] Remove bottom border on `.thesis-add-header`
- [x] Add subtitle "Formulaire pour XAMXAM" below partage header, with Ductus link to /
- [x] Switch `.thesis-add-header` to grid layout
- [ ] Create `admin/operation.php` — unified add/edit page
- [ ] Wire up route: `?id=` → edit mode, no id → add mode
- [ ] Update all references: `add.php` → `operation.php`, `edit.php` → `operation.php?id=`
- [ ] Keep old `add.php` and `edit.php` as redirect stubs
- [ ] Keep action endpoints (`actions/formulaire.php`, `actions/edit.php`) unchanged
- [ ] Test both flows