cleanup: remove duplicate escapeHtml function, add null check to remaining one

bot/static/index.html

@@ -4042,6 +4042,7 @@ function scrollLogsToBottom() {
 }
 
 function escapeHtml(text) {
+  if (!text) return '';
   const div = document.createElement('div');
   div.textContent = text;
   return div.innerHTML;
@@ -5908,13 +5909,6 @@ function filterMemories(listId, searchTerm) {
   });
 }
 
-function escapeHtml(str) {
-  if (!str) return '';
-  const div = document.createElement('div');
-  div.textContent = str;
-  return div.innerHTML;
-}
-
 function escapeJsonForAttribute(obj) {
   // Properly escape JSON for use in HTML attributes
   return JSON.stringify(obj)