fixed reasoning

frontend/src/api/client.ts

@@ -11,6 +11,7 @@ export interface ChatMessage {
   id: number;
   role: string;
   content: string;
+  tool_calls_json?: string | null;
   created_at: string;
 }
 

frontend/src/pages/Chat.tsx

@@ -7,6 +7,7 @@ import "./Chat.css";
 
 function shouldShowMessage(msg: ChatMessage): boolean {
   if (msg.role === "tool") return false;
+  if (msg.role === "assistant" && msg.tool_calls_json) return false;
   if (msg.role === "assistant" && !msg.content.trim()) return false;
   return true;
 }