fix: await outside async in fetchTaskRuns

frontend/src/App.jsx

@@ -378,7 +378,8 @@ const App = () => {
     try {
       const r = await fetch(`${API}/api/tasks/${taskId}/runs`);
       if (r.ok) {
-        setTaskRuns(prev => ({ ...prev, [taskId]: await r.json() }));
+        const runs = await r.json();
+        setTaskRuns(prev => ({ ...prev, [taskId]: runs }));
       }
     } catch (e) { /* ignore */ }
   };