fix: avoid stray zero in consultation composer

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);