More informative error message in case search returned an error

docs/docs/ai_search/index.md

@@ -290,7 +290,7 @@ window.addEventListener('load', function() {
             spinner.style.display = 'none';
             resultsContainer.innerHTML = `
                 <div class="error-message">
-                    An error occurred while searching. Please try again later.
+                    No results found. Please try again.
                 </div>
             `;
         }