Refine codex app controls and message navigation

scripts/mock-codex-app-server.js

@@ -161,6 +161,69 @@ function completeTurn(thread, turnId, text, status = 'completed') {
     });
   }
 
+  if (/subagent|collab/i.test(text)) {
+    send({
+      method: 'item/started',
+      params: {
+        threadId: thread.id,
+        turnId,
+        startedAtMs: Date.now(),
+        item: {
+          id: 'tool-collab',
+          type: 'collabAgentToolCall',
+          tool: 'spawn_agent',
+          prompt: '整理前端改动并回报状态',
+          receiverThreadIds: ['child-thread-a', 'child-thread-b'],
+          agentsStates: {
+            'child-thread-a': {
+              name: '实现代理',
+              role: 'frontend',
+              status: 'in_progress',
+              summary: '正在补充结构化渲染与样式',
+            },
+            'child-thread-b': {
+              name: '验证代理',
+              role: 'qa',
+              status: 'completed',
+              summary: '已完成基础事件链检查',
+            },
+          },
+          status: 'inProgress',
+        },
+      },
+    });
+    send({
+      method: 'item/completed',
+      params: {
+        threadId: thread.id,
+        turnId,
+        completedAtMs: Date.now(),
+        item: {
+          id: 'tool-collab',
+          type: 'collabAgentToolCall',
+          tool: 'spawn_agent',
+          prompt: '整理前端改动并回报状态',
+          receiverThreadIds: ['child-thread-a', 'child-thread-b'],
+          agentsStates: {
+            'child-thread-a': {
+              name: '实现代理',
+              role: 'frontend',
+              status: 'completed',
+              summary: '结构化渲染已完成',
+            },
+            'child-thread-b': {
+              name: '验证代理',
+              role: 'qa',
+              status: 'completed',
+              summary: '事件链与持久化检查通过',
+            },
+          },
+          status: 'completed',
+        },
+      },
+    });
+  }
+
   send({
     method: 'thread/tokenUsage/updated',
     params: {