feat(chat): add manual refresh for delivered agents

tests/e2e/fixtures/teacher-preview-layout.tsx

@@ -14,7 +14,9 @@ export function Layout() {
   const [open, setOpen] = useState(false);
   const [width, setWidth] = useState(508);
   const [long, setLong] = useState(true);
-  const count = Number(new URLSearchParams(location.search).get('agents') ?? 0);
+  const [count, setCount] = useState(Number(new URLSearchParams(location.search).get('agents') ?? 0));
+  const [refreshing, setRefreshing] = useState(false);
+  const [refreshStatus, setRefreshStatus] = useState<'idle' | 'success' | 'error'>('idle');
   const [selected, setSelected] = useState(0);
   const agents = Array.from({ length: count }, (_, index) => ({
     teacher_id: `agent-${index}`, version: index + 1, is_default: index === 0,
@@ -27,6 +29,16 @@ export function Layout() {
     definition: agents[selected]?.definition ?? { name: '编程老师', avatar_id: 'avatar-06' },
     invitation: visible ? { response: long ? '你刚才说想做一个宠物游戏。我们一起想想，什么样的小动作，会让你愿意一直陪它玩下去？可以先挑一个最想试的想法。' : '有什么编程问题想一起讨论？' } : null,
     welcome: null, enabled: true, loading: false, checking: false, error: null,
+    refreshing, refreshStatus,
+    refresh: async () => {
+      setRefreshing(true);
+      setRefreshStatus('idle');
+      await new Promise((resolve) => window.setTimeout(resolve, 100));
+      setCount((current) => current + 1);
+      setRefreshStatus('success');
+      setRefreshing(false);
+    },
+    reloadCatalog: async () => {},
     dismiss: () => setVisible(false),
   } as ComponentProps<typeof TeacherCompanion>['companion'];
   return <div className="classroom-workspace flex h-screen flex-col bg-white">