feat(ui): simplify task panel output cards — remove content summary and user message text

- Remove artifact summary paragraph under each document name
- Remove task title (user message) from right-side meta, keep only timestamp
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/ui/src/features/tasks/TaskPanelView.tsx

@@ -213,7 +213,6 @@ function TaskPanelOutputList({ outputs }: { outputs: TaskPanelOutputItem[] }) {
                 <strong title={artifact.name}>{artifact.name}</strong>
                 <span className="task-panel-output-kind">{artifact.kind ?? "产物"}</span>
               </div>
-              <p>{artifact.summary ?? task.taskTitle}</p>
               {artifactPath ? (
                 <div className="task-panel-output-url-row">
                   <button
@@ -236,7 +235,7 @@ function TaskPanelOutputList({ outputs }: { outputs: TaskPanelOutputItem[] }) {
               </span>
               <div>
                 <strong title={task.expertName}>{task.expertName}</strong>
-                <span title={task.taskTitle}>{formatTaskPanelOutputTime(task, artifact)} · {task.taskTitle}</span>
+                <span>{formatTaskPanelOutputTime(task, artifact)}</span>
               </div>
             </div>
           </article>