fix: avoid stray zero in consultation composer

.project-docs/30-worklog/tasks/20260924-agent-rendering-a8c2d419.md

@@ -0,0 +1,42 @@
+# Task: Fix consultation response rendering
+
+## Identity
+
+- Task ID: 20260924-agent-rendering-a8c2d419
+- Mode: Feature
+- Branch: codex/20260924-agent-rendering-a8c2d419-agent-rendering
+- Worktree: D:\Datas\OthersProjects\.codex-worktrees\makelore\20260924-agent-rendering-a8c2d419
+- Base commit: 0a8fce67a4ea6de291f82c09c17d3efe0ea7b92c
+- Owner: codex
+- Status: Ready for Integration
+
+## Scope
+
+- 修复用户截图中的咨询面板渲染：空旧草稿导致数字 0；定位序列化项目上下文进入智能体回复的问题。客户端仅修改证据确认的显示缺陷，云端事件生产问题在独立 Yuxi 任务处理。
+
+## Intent And Constraints
+
+- maintain-project-docs 与 diagnosing-bugs 已加载。官方 check/start/status、项目记忆与 peer scope 检查完成，Concurrent/Planning Gates Passed；Feature 模式仅写本人记录和必要产品/测试文件。
+- 保留用户话题原文，不批量替换转义字符，不以 JSON 外形猜测并删除回复。线上事件探针被自动审批以 blocked by policy 拒绝，已停止该访问方式，改用本地数据和真实协议测试。用户随后批准创建 1 个全新只读 Reviewer，已委派两端补丁审查。
+
+## Outcome
+
+- 已从本地历史确认异常回复含序列化上下文；Yuxi 对非 AI 消息的错误投影在关联任务修复，客户端不添加猜测式内容清洗。
+- 空旧草稿条件显式转换为 Boolean，避免 references.length 为 0 时作为 React 子节点显示。保留有内容的旧草稿入口，产品流程不变；README 无需改变。
+
+## Verification
+
+- pnpm exec vitest run tests/unit/coding-teacher-ui.test.tsx -t 'does not render a zero' --maxWorkers=1：预期失败，复现截图数字 0。
+- pnpm exec vitest run tests/unit/coding-teacher-ui.test.tsx --maxWorkers=1：30 passed。
+- MAKELORE_LAYOUT_BROWSER_CHANNEL=msedge pnpm exec playwright test tests/e2e/teacher-discussion-layout.spec.ts --grep ordinary：319/508px 两个真实浏览器页面用例通过，使用现有隔离页面与模拟 API。
+- pnpm run typecheck、三处改动文件的 eslint、pnpm run build:vite、git diff --check：通过。构建仅有既有 chunk 大小及动态/静态混用提示。
+- 官方 check_doc_drift.py：Feature 文件所有权边界通过。未打包、安装、合并、推送或部署；未进行线上收费对话。
+- 用户授权的全新只读 Reviewer agent_rendering_review 独立审查 PASS，无 findings；复跑客户端 30/30、Yuxi 55/55 通过。已目视核对508px页面截图，无数字0，回复/草稿/快捷提问显示正常。
+
+## Follow-ups
+
+- 部署 Yuxi 并更新客户端后才能影响用户当前安装，部署后验收一次真实提问及只读工具续接。历史异常原文保持不变。当前仅交付任务分支修复，不含合并或部署。
+
+## Promotion Candidates
+
+- None recorded.

src/pages/Chat/TeacherChatPanel.tsx

@@ -443,7 +443,7 @@ export function TeacherChatPanel({
       {topic?.unsaved && <div className="px-5 py-2 text-xs text-destructive">回复尚未保存，请复制或重试保存。<button className="ml-2 underline" onClick={() => void teacherApi.save(topicBase, topic.id).then(consume).catch(() => setError('保存失败，请先复制回复。'))}>重试保存</button></div>}
       {!topicEnabled && !error && !busy && <p className="px-5 pb-2 text-xs text-muted-foreground">{legacyFriend ? '这是旧版内置朋友的话题，仅供查看。请选择智能体新建话题。' : `${label}暂未开放，历史仍可查看。`}</p>}
       <form className="px-4 pb-4 pt-2" onSubmit={(e) => { e.preventDefault(); void send(); }}>
-        {(legacyDraft.text?.trim() || legacyDraft.references?.length) && <details className="mb-2 text-xs text-muted-foreground">
+        {Boolean(legacyDraft.text?.trim() || legacyDraft.references?.length) && <details className="mb-2 text-xs text-muted-foreground">
           <summary>查看旧版朋友草稿</summary>
           <div className="max-h-40 overflow-auto whitespace-pre-wrap rounded-lg border p-2">
             {legacyDraft.text}

tests/e2e/teacher-discussion-layout.spec.ts

@@ -24,9 +24,14 @@ for (const width of [319, 508]) for (const kind of ['ordinary', 'ideas', 'struct
   test(`${kind} pins the current tool and composer at ${width}px`, async ({ page }) => {
     await page.setViewportSize({ width: 1180, height: 800 });
     const errors: string[] = []; page.on('pageerror', error => errors.push(error.message));
+    await page.addInitScript(() => localStorage.setItem(
+      'makelore-consultation-draft:fixture:fixture:friend', JSON.stringify({ text: '', references: [] }),
+    ));
     await page.goto(`${url}?kind=${kind}&width=${width}`);
     const input = page.getByRole('textbox', { name: '向智能体提问' });
     await expect(input).toBeEnabled();
+    await expect(page.locator('form')).not.toHaveText(/^0/);
+    await expect(page.getByText('查看旧版朋友草稿')).toHaveCount(0);
     const tool = page.getByTestId('teacher-discussion');
     if (kind === 'ordinary') {
       await expect(tool).toHaveCount(0);

tests/unit/coding-teacher-ui.test.tsx

@@ -96,6 +96,15 @@ async function ready() {
   await waitFor(() => expect(streams.has('first')).toBe(true));
 }
 describe('teacher side chat', () => {
+  it('does not render a zero for an empty legacy friend draft', async () => {
+    localStorage.setItem('makelore-consultation-draft:signed-out:p:friend', JSON.stringify({ text: '', references: [] }));
+    render(<TeacherChatPanel projectId="p" sourceId="c" />);
+    await ready();
+    const composer = screen.getByLabelText('向智能体提问').closest('form');
+    expect(composer).not.toHaveTextContent(/^0/);
+    expect(screen.queryByText('查看旧版朋友草稿')).not.toBeInTheDocument();
+  });
+
   it('retains failed input and retries with the same request id, then appends a reply only on click', async () => {
     const bringBack = vi.fn();
     api.send