Fix form field required states & missing fields per spec

- Admin add: add contact_public checkbox (matching edit form)
- All forms: formats checkbox-list now required
- All forms: jury promoteur·ice interne required, lecteur·ice interne/externe required
- All forms: licence select now required
- Admin edit: add E-mail de confirmation fieldset
- Partage: contact always visible when provided (no contact_public field)
- Partage: filter PACS from AP programs dropdown
- Server-side validation: formats, jury, licence required (create + edit controllers)
- Autofocus mappings for new validation errors
- No duplicate asterisks — verified across all rendered fields
- fix: add missing old() function in admin edit controller
- refactor: move admin email field to Backoffice as Contact interne, never send email
- Untrack admin.log (covered by .gitignore)

app/templates/admin/edit.php

@@ -65,7 +65,7 @@
             <legend>Format(s)</legend>
             <?php
             $checkedFormats = $formData['formats'] ?? $currentFormats;
-            $name = 'formats'; $label = 'Format(s) du TFE :'; $options = $formatTypes; $checked = $checkedFormats;
+            $name = 'formats'; $label = 'Format(s) du TFE :'; $options = $formatTypes; $checked = $checkedFormats; $required = true;
             include APP_ROOT . '/templates/partials/form/checkbox-list.php';
             ?>
         </fieldset>
@@ -301,6 +301,14 @@
                 <small>Notes internes (non visibles publiquement).</small>
             </div>
 
+            <div class="admin-form-group">
+                <label for="contact_interne">Contact interne :</label>
+                <input type="email" id="contact_interne" name="contact_interne"
+                       value="<?= htmlspecialchars($currentRaw['contact_interne'] ?? $currentAuthorEmail ?? '') ?>"
+                       placeholder="ton.email@exemple.be">
+                <small>Adresse de contact interne (non visible publiquement).</small>
+            </div>
+
             <div class="admin-form-group">
                 <label class="admin-checkbox-label">
                     <input type="checkbox" name="exemplaire_baiu" value="1"