fix: preserve complete consultation replies and recover retained history

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

@@ -47,6 +47,40 @@ test('retry stickers stay readable and preserve drafts in a 319px consultation',
 });
 
 for (const width of [319, 508]) {
+  test(`quoted replies recover fully and incomplete replies retry without losing the draft at ${width}px`, async ({ page }) => {
+    await page.setViewportSize({ width: 1180, height: 800 });
+    const sent = () => page.evaluate(() => (window as unknown as { __teacherReplyInputs: unknown[] }).__teacherReplyInputs);
+    await page.goto(`${url}?kind=recovered&width=${width}`);
+    const panel = page.getByTestId('teacher-chat-panel');
+    const body = page.getByTestId('teacher-reply');
+    await expect(body).toContainText('它早就不是"刚搭好架子"那种阶段了');
+    await expect(body).toContainText('现在的阶段是「能玩，正在调手感」。');
+    await expect(page.getByText('查看收到的原始内容').locator('..')).not.toHaveAttribute('open');
+    await expect(page.getByRole('button', { name: '重新回答' })).toHaveCount(0);
+    expect(await sent()).toEqual([]);
+    expect(await body.evaluate(el => el.scrollWidth <= el.clientWidth)).toBe(true);
+    await panel.screenshot({ path: test.info().outputPath(`recovered-${width}.png`) });
+
+    await page.goto(`${url}?kind=incomplete&width=${width}`);
+    await expect(page.getByRole('status')).toHaveText('这次回复未能完整显示');
+    await expect(page.getByTestId('teacher-reply')).toHaveCount(0);
+    expect(await sent()).toEqual([]);
+    const input = page.getByRole('textbox', { name: '向智能体提问' });
+    await input.fill('我还在写的新想法');
+    const retry = page.getByRole('button', { name: '重新回答' });
+    const bounds = (await retry.boundingBox())!;
+    expect(bounds.height).toBeGreaterThanOrEqual(44);
+    expect(await panel.evaluate(el => el.scrollWidth <= el.clientWidth)).toBe(true);
+    await panel.screenshot({ path: test.info().outputPath(`incomplete-${width}.png`) });
+    await retry.click();
+    await expect(page.getByText('好，我们就从这一个问题聊起。')).toBeVisible();
+    await expect(input).toHaveValue('我还在写的新想法');
+    expect(await sent()).toEqual([{
+      requestId: expect.any(String), text: '现在项目是什么阶段？',
+      sourceConversationId: 'original-source', references: [{ messageId: 'original-message', text: '原来的项目记录', role: 'assistant' }],
+    }]);
+  });
+
   test(`empty-composer hint stays readable and keeps the send position stable at ${width}px`, async ({ page }) => {
     await page.setViewportSize({ width: 1180, height: 800 });
     await page.goto(`${url}?kind=ordinary&width=${width}`);