style: normalize headers, overtype editor rounded corners, remove duplicate cover preview, thesis-add-header grid layout, subtitle below header with top gradient

app/public/admin/licence-fragment.php

@@ -0,0 +1,46 @@
+<?php
+/**
+ * HTMX fragment (admin): renders the licence section with conditional required states.
+ *
+ * POST: access_type_id, license_id, license_custom, cc2r, admin_mode
+ *
+ * Admin mode: never required.
+ */
+require_once __DIR__ . '/../../bootstrap.php';
+require_once __DIR__ . '/../../src/AdminAuth.php';
+AdminAuth::requireLogin();
+
+$accessTypeId = $_POST['access_type_id'] ?? '2';
+$licenseId    = $_POST['license_id']     ?? '';
+$licenseCustom = $_POST['license_custom'] ?? '';
+$cc2r         = !empty($_POST['cc2r']);
+$adminMode    = true;
+
+require_once APP_ROOT . '/src/Database.php';
+$db = Database::getInstance();
+$licenseTypes = $db->getAllLicenseTypes();
+?>
+
+<div class="licence-license-choice">
+    <?php
+    $name = 'license_id'; $label = 'Licence :'; $options = $licenseTypes;
+    $selected = $licenseId; $placeholder = '— Sélectionner —'; $required = false;
+    include APP_ROOT . '/templates/partials/form/select-field.php';
+    ?>
+
+    <?php
+    $name = 'license_custom'; $label = 'Ou précisez une autre licence :';
+    $value = htmlspecialchars($licenseCustom);
+    $hint = 'Ex: CC BY-NC 4.0, Tous droits réservés...';
+    include APP_ROOT . '/templates/partials/form/text-field.php';
+    ?>
+
+    <div class="admin-form-group">
+        <label class="admin-checkbox-label">
+            <input type="checkbox" name="cc2r" value="1"
+                   <?= $cc2r ? 'checked' : '' ?>>
+            J'accepte les Conditions Collectives de Réutilisation (CC2r)
+        </label>
+        <small><a href="https://cc2r.net/" target="_blank" rel="noopener">En savoir plus sur la CC2r ↗</a></small>
+    </div>
+</div>