style(teacher): make the retry action a playful sticker

tests/e2e/fixtures/teacher-reply-api.ts

@@ -10,6 +10,13 @@ const samples: Record<string, unknown> = {
 const scenario = new URLSearchParams(location.search).get('kind') ?? 'ideas';
 let current: TeacherTopic = { schemaVersion: 1, revision: 1, id: 'discussion-fixture', accountId: 'fixture', projectId: 'fixture', sourceConversationId: 'project', definition, version: 1, createdAt: 'now', updatedAt: 'now', requests: Array.from({ length: 8 }, (_, i) => ({ id: `r${i}`, text: i === 7 ? '我还没想好，我们边聊边想。' : '我希望这个游戏更有意思。', references: [], createdAt: 'now', sourceCursor: { workerGeneration: 0, seq: i }, sourceCapturedAt: 'now', includedSourceMessageIds: [], omittedMessages: 0, status: 'completed', response: i === 7 ? '可以，我们先把已经想到的放在一起。哪里还不确定，就留着继续聊。' : '先从你最在意的一个小地方开始想。', ...(i === 7 ? { suggestedQuestions: ['有什么好玩的想法？'] } : {}) })), ...(samples[scenario] ? { discussion: { id: 'tool', revision: 1, status: 'active', content: structuredClone(samples[scenario]) } } : {}) };
 const stream = Object.assign(new EventTarget(), { close() {}, onerror: null, onopen: null });
+if (scenario === 'retry') {
+  const status = new URLSearchParams(location.search).get('status') === 'cancelled' ? 'cancelled' : 'failed';
+  current.requests = [{
+    ...current.requests[0], text: '给我一点提示', intent: 'suggestions', status, response: '',
+    ...(status === 'failed' ? { error: '这次没连上，我们可以再试一次。' } : {}),
+  }];
+}
 if (scenario === 'rich-text') {
   current.requests = [{
     ...current.requests[0], text: '帮我看看项目和最近的讨论',