feat(widgets): allow users to customize widget titles from settings gear dropdown

api/planner.php

@@ -42,8 +42,27 @@ try {
             exit;
         }
 
+        // Valideer en sanitize layout items inclusief optionele custom widget titel
+        $cleanedLayout = [];
+        foreach ($layout as $item) {
+            if (!is_array($item) || empty($item['id'])) continue;
+            $cleaned = [
+                'id'       => substr(trim((string)$item['id']), 0, 64),
+                'enabled'  => !empty($item['enabled']),
+                'col_span' => in_array((int)($item['col_span'] ?? 6), [4, 5, 6, 7, 8, 12]) ? (int)$item['col_span'] : 6,
+                'order'    => (int)($item['order'] ?? 1),
+            ];
+            if (!empty($item['custom_title'])) {
+                $customTitle = trim(strip_tags((string)$item['custom_title']));
+                if ($customTitle !== '') {
+                    $cleaned['custom_title'] = substr($customTitle, 0, 50);
+                }
+            }
+            $cleanedLayout[] = $cleaned;
+        }
+
         $stmt = $db->prepare("UPDATE users SET fociz_widget_layout = ? WHERE id = ?");
-        $stmt->execute([json_encode($layout), $user['id']]);
+        $stmt->execute([json_encode($cleanedLayout, JSON_UNESCAPED_UNICODE), $user['id']]);
 
         echo json_encode(['success' => true, 'message' => 'Widget indeling succesvol opgeslagen']);
         exit;