diff --git a/public/pdf.html b/public/pdf.html
index b16bd0a..f76241f 100644
--- a/public/pdf.html
+++ b/public/pdf.html
@@ -1160,6 +1160,14 @@
                 el.appendChild(card);
             });
         });
+
+        // Render page thumbnails for selected file
+        const _sel = state.files.find(f => f.id === state.selectedFileId);
+        if (_sel && typeof renderPageGrid === 'function') {
+            renderPageGrid('deletePageGrid', 'deleteHint', _sel.id, _sel.pages, 'delete');
+            renderPageGrid('rotatePageGrid', 'rotateHint', _sel.id, _sel.pages, 'rotate');
+            renderPageGrid('reorderPageGrid', 'reorderHint', _sel.id, _sel.pages, 'reorder');
+        }
     }
 
     function escHtml(str) {
@@ -1450,6 +1458,10 @@
             showError('Введите текст водяного знака.');
             return;
         }
+        if (op === 'pages' && state.pagesSubOp === 'delete' && getSelectedPages('deletePageGrid').length === 0) {
+            showError('Выберите страницы для удаления');
+            return;
+        }
         if (op === 'security' && state.securitySub === 'protect' && !document.getElementById('protectPassword').value) {
             showError('Введите пароль для защиты файла.');
             return;
@@ -1691,17 +1703,7 @@
         return Array.from(grid.querySelectorAll('.page-thumb.selected')).map(t => parseInt(t.dataset.page));
     }
 
-    // Re-render grids when file selection changes
-    const origRenderSingle = renderSingleFileSelectors;
-    renderSingleFileSelectors = function() {
-        origRenderSingle();
-        const sel = state.files.find(f => f.id === state.selectedFileId);
-        if (sel) {
-            renderPageGrid('deletePageGrid', 'deleteHint', sel.id, sel.pages, 'delete');
-            renderPageGrid('rotatePageGrid', 'rotateHint', sel.id, sel.pages, 'rotate');
-            renderPageGrid('reorderPageGrid', 'reorderHint', sel.id, sel.pages, 'reorder');
-        }
-    };
+
 
 })();