feat: hide ONLYOFFICE logo via direct CSS patch + iframe injection + init script for persistence

static/carbone.js

@@ -359,6 +359,17 @@ async function openOnlyofficeEditor(templateId, templateName) {
         },
         onDocumentReady: function() {
           console.log('Document loaded in editor');
+          // Inject CSS into ONLYOFFICE iframe to hide the logo
+          try {
+            var iframe = document.getElementById(containerId).querySelector('iframe');
+            if (iframe && iframe.contentDocument) {
+              var style = iframe.contentDocument.createElement('style');
+              style.textContent = '#header-logo { display: none !important; }';
+              iframe.contentDocument.head.appendChild(style);
+            }
+          } catch(e) {
+            console.log('Could not inject CSS into iframe:', e);
+          }
         },
         onSave: function(event) {
           toast('Document saved successfully');

static/index.html

@@ -139,7 +139,7 @@
 <!-- Modals -->
 <div class="modal-overlay" id="modal-overlay"></div>
 
-<script src="/static/app.js?v=9"></script>
-<script src="/static/carbone.js?v=9"></script>
+<script src="/static/app.js?v=10"></script>
+<script src="/static/carbone.js?v=10"></script>
 </body>
 </html>