fix file batch deletion

static/js/rooms/room.js

@@ -74,7 +74,46 @@ class RoomManager {
     
     initializeEventListeners() {
         console.log('[RoomManager] Setting up event listeners');
-        // Add any global event listeners here
+        
+        // Add event listener for select all checkbox
+        const selectAllCheckbox = document.querySelector('.select-all-checkbox');
+        if (selectAllCheckbox) {
+            selectAllCheckbox.addEventListener('change', (event) => {
+                const checkboxes = document.querySelectorAll('.select-item-checkbox');
+                checkboxes.forEach((cb, index) => {
+                    cb.checked = event.target.checked;
+                    if (event.target.checked) {
+                        this.fileManager.selectedItems.add(index);
+                    } else {
+                        this.fileManager.selectedItems.delete(index);
+                    }
+                });
+                this.viewManager.updateMultiSelectUI();
+            });
+        }
+
+        // Add event listener for download selected button
+        const downloadSelectedBtn = document.getElementById('downloadSelectedBtn');
+        if (downloadSelectedBtn && this.canDownload) {
+            downloadSelectedBtn.addEventListener('click', () => {
+                this.fileManager.downloadSelected();
+            });
+        }
+
+        // Add event listener for delete selected button
+        const deleteSelectedBtn = document.getElementById('deleteSelectedBtn');
+        if (deleteSelectedBtn && this.canDelete) {
+            deleteSelectedBtn.addEventListener('click', () => {
+                this.modalManager.showBatchDeleteModal();
+            });
+        }
+
+        // Add event listener for clicking outside to clear selection
+        document.addEventListener('click', (event) => {
+            if (!event.target.closest('.file-card') && !event.target.closest('.file-row') && !event.target.closest('.file-action-btn')) {
+                this.fileManager.clearSelection();
+            }
+        });
     }
 }