refactor form structure per new spec + fix

- split jury into interne/externe/ULB,
- remove president from student form,
- add language_autre,
- split duration into pages+minutes+annexes,
- move licence to degrés d'ouverture with CC2r,
- add license_custom,
- filter PACS from student AP list,
- editable généralités help block,
- Libre toggle per settings

Fix:
- missing comma after cc4r column in schema.sql
- remove duplicate form footer from partage template
- remove couverture from student files fieldset; add promoteur ULB conditional disable via JS on Approfondi
- promoteur ULB: remove 'si applicable', make required when visible

app/templates/partials/form/file-field.php

@@ -7,24 +7,27 @@
  *   string      $label     — visible label text
  *   string      $accept    — MIME types / extensions for the accept attribute (e.g. 'image/jpeg,image/png')
  *   string|null $hint      — optional hint shown in <small> below the input
+ *   bool        $required  — whether the field is required; default false
  *   bool        $multiple  — whether to allow multiple file selection; default false
  *   string|null $id        — override the id attribute (defaults to $name)
  */
 
 $accept   = $accept   ?? '';
 $hint     = $hint     ?? null;
+$required = $required ?? false;
 $multiple = $multiple ?? false;
 $id       = $id       ?? $name;
 $previewId = 'fp-' . htmlspecialchars($id);
 ?>
 <div>
-    <label for="<?= htmlspecialchars($id) ?>"><?= htmlspecialchars($label) ?></label>
+    <label for="<?= htmlspecialchars($id) ?>"><?= htmlspecialchars($label) ?><?= $required ? ' <span class="asterisk">*</span>' : '' ?></label>
     <div class="admin-file-input">
         <input type="file"
                id="<?= htmlspecialchars($id) ?>"
                name="<?= htmlspecialchars($name) ?><?= $multiple ? '[]' : '' ?>"
                <?= $accept   ? 'accept="'   . htmlspecialchars($accept)  . '"' : '' ?>
                <?= $multiple ? 'multiple' : '' ?>
+               <?= $required ? 'required' : '' ?>
                data-preview="<?= $previewId ?>">
         <div id="<?= $previewId ?>" class="file-preview-list" aria-live="polite"></div>
         <?php if ($hint): ?>
@@ -33,4 +36,4 @@ $previewId = 'fp-' . htmlspecialchars($id);
     </div>
 </div>
 <?php
-unset($accept, $hint, $multiple, $id, $previewId);
+unset($accept, $hint, $required, $multiple, $id, $previewId);