Fix: Reset suggestions cache on user message to re-enable tool buttons after chat

ui/suite/chat/chat.html

@@ -1084,6 +1084,8 @@ function sendMessage(messageContent) {
       currentStreamingContent = "";
       // Also reset thinking state when user sends a new message
       isThinking = false;
+      // Reset suggestions cache so tool buttons are re-rendered after conversation
+      lastRenderedSuggestions = null;
 
       // Inject active switchers into content
             var activeKeys = Object.keys(activeSwitchers).filter(function(k) { return activeSwitchers[k]; });