fix: Render tool calls with no args

src/components/thread/messages/tool-calls.tsx

@@ -18,8 +18,7 @@ export function ToolCalls({
     <div className="space-y-4">
       {toolCalls.map((tc, idx) => {
         const args = tc.args as Record<string, any>;
-        if (!tc.args || Object.keys(args).length === 0) return null;
-
+        const hasArgs = Object.keys(args).length > 0;
         return (
           <div
             key={idx}
@@ -35,6 +34,7 @@ export function ToolCalls({
                 )}
               </h3>
             </div>
+            {hasArgs ? (
               <table className="min-w-full divide-y divide-gray-200">
                 <tbody className="divide-y divide-gray-200">
                   {Object.entries(args).map(([key, value], argIdx) => (
@@ -55,6 +55,9 @@ export function ToolCalls({
                   ))}
                 </tbody>
               </table>
+            ) : (
+              <code className="text-sm block p-3">{"{}"}</code>
+            )}
           </div>
         );
       })}