fix(e2e): UI-11 send upload to register freeform doc-free

Chip assert after setInputFiles, wait POST /freeform-documents 2xx on
send, then pin doc-free pane id and drain this-turn assistant before
leaving UI-11.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/e2e/document-revision-runtime.spec.ts

@@ -870,27 +870,60 @@ test.describe.serial('document-revision-runtime UI acceptance', () => {
       const { v, r } = await readVersionBadge(page);
       states.push(`${target.title}:${v}/${r}`);
     }
-    // Page upload attachment — assert registered doc-free id on pane (ignore any chat assistant side effects).
+    // Page upload: chip draft → send → POST /api/v1/freeform-documents → doc-free pane.
     const fileInput = page.locator('input[type="file"]');
     if ((await fileInput.count()) === 0) fail('no file input for page upload');
     const tmp = path.join(ASSETS, `upload-${suffix}.txt`);
+    const uploadName = `upload-${suffix}.txt`;
     fs.writeFileSync(tmp, `attachment ${suffix}\n`, 'utf-8');
     await fileInput.first().setInputFiles(tmp);
+    await expect(
+      page.getByText(uploadName, { exact: false }).or(page.getByText(`upload-${suffix}`, { exact: false })),
+    ).toBeVisible({ timeout: 15_000 });
+
+    const archivePrompt = '请将此附件归档为我的私密参考文档。';
+    const freeformWait = page.waitForResponse(
+      (r) => {
+        const pathOnly = sanitizeUrl(r.url());
+        return (
+          r.request().method() === 'POST' &&
+          pathOnly.includes('/api/v1/freeform-documents') &&
+          !pathOnly.includes('/from-message')
+        );
+      },
+      { timeout: 60_000 },
+    );
+    const box = page.getByPlaceholder(/向项目助手提问/);
+    await expect(box).toBeVisible({ timeout: 15_000 });
+    // 附件允许空文本；填归档句以便本轮 assistant 可定位并收口终态。
+    await box.fill(archivePrompt);
+    await page.getByRole('button', { name: /发送/ }).click();
+
+    const freeformRes = await freeformWait;
+    const freeformStatus = freeformRes.status();
+    if (freeformStatus < 200 || freeformStatus >= 300) {
+      fail(`UI-11 POST /api/v1/freeform-documents must be 2xx, got HTTP ${freeformStatus}`);
+    }
+
     const pane = page.getByTestId('active-document-pane');
     await expect(pane).toHaveAttribute('data-doc-id', /^doc-free-/, { timeout: 45_000 });
     uploadedDocId = (await pane.getAttribute('data-doc-id')) || '';
     if (!uploadedDocId.startsWith('doc-free-')) {
       fail(`UI-11 upload must activate doc-free-* pane, got ${uploadedDocId}`);
     }
-    if (uploadedDocId.startsWith('doc-upload')) {
+    if (uploadedDocId.includes('doc-upload')) {
       fail(`UI-11 must not leave doc-upload orphan active: ${uploadedDocId}`);
     }
+
+    // 发送会拉起普通 assistant：离开 UI-11 前等本轮终态，避免污染 UI-12+。
+    await waitForSquadCompletion(page, '请将此附件归档', 180_000);
+
     await shot(page, 'UI-11-multi-doc.png');
     recordPass({
       id: 'UI-11',
       name: 'multi doc + upload',
-      input: 'chat second doc; upload file',
-      actual: `${states.join('; ')}; uploadedDocId=${uploadedDocId}`,
+      input: 'chat second doc; upload file + send for freeform register',
+      actual: `${states.join('; ')}; freeform HTTP ${freeformStatus}; uploadedDocId=${uploadedDocId}`,
       networkLogs: logs,
       durationMs: Date.now() - t0,
       verdict: 'PASS',