deduplication of trash code

static/js/trash.js

@@ -51,7 +51,7 @@ window.emptyTrash = function() {
     }
 
     // Get all trashed files to get their room IDs
-    fetch('/api/rooms/trash')
+    fetch('/api/trash')
     .then(r => r.json())
     .then(files => {
         if (!files || !files.length) {
@@ -97,7 +97,9 @@ window.emptyTrash = function() {
             document.querySelector('.modal-backdrop')?.remove();
             document.body.classList.remove('modal-open');
             // Refresh the view to ensure everything is up to date
-            fetchFiles();
+            if (typeof window.fetchFiles === 'function') {
+                window.fetchFiles();
+            }
         } else {
             console.error('Failed to empty trash in some rooms');
             // Show error message to user