fix(knowledge): 统一向量化费用归属说明

tests/unit/cloud-agents-workflows.test.tsx

@@ -118,6 +118,8 @@ it('saves independent Agent ceilings and pages cost results under the active sou
   render(<><CloudBudgetEditor slug={slug} /><CloudCosts slug={slug} applications={[]} /></>);
   const request = await screen.findByLabelText('每次任务上限（词元点数）');
   await waitFor(() => expect(request).toBeEnabled());
+  expect(screen.getByRole('option', { name: '知识库模型调用' })).toBeInTheDocument();
+  expect(screen.getByText(/知识处理触发的对话模型调用仍按实际用量计入费用/)).toHaveTextContent('embedding 向量化由平台承担，不计入用户用量、词元点数或智能体费用上限');
   fireEvent.change(request, { target: { value: '20.50' } });
   fireEvent.change(screen.getByLabelText('每日上限（词元点数）'), { target: { value: '100' } });
   fireEvent.click(screen.getByRole('button', { name: '保存费用上限' }));

tests/unit/cloud-knowledge-catalog.test.tsx

@@ -20,8 +20,10 @@ function openCreation() {
 it('explains who configures an empty embedding catalog and refreshes without losing the name', async () => {
   api.call.mockResolvedValueOnce(empty).mockResolvedValueOnce(available);
   openCreation();
-  expect(await screen.findByText('暂时没有可用的向量模型。请联系平台管理员在 Yuxi 完成配置，然后刷新。')).toBeVisible();
+  expect(await screen.findByText('暂时没有可用的向量模型。Embedding 只在 Yuxi 配置，请联系平台管理员启用后刷新；向量化费用由平台承担，不计入用户用量或智能体费用上限。')).toBeVisible();
   expect(screen.getByRole('combobox', { name: '向量模型' })).toBeDisabled();
+  expect(screen.getByText(/上传到知识库的文档可供/)).toHaveTextContent('embedding 向量化由平台承担，不计入用户用量、词元点数或智能体费用上限');
+  expect(screen.getByText(/上传到知识库的文档可供/)).toHaveTextContent('知识处理如触发对话模型调用，仍按原模型实际用量计费');
   fireEvent.click(screen.getByText('管理员配置说明'));
   expect(screen.getByText(/Yuxi 后台/)).toHaveTextContent('智能体管理 → 模型供应商');
   expect(screen.getByText(/Yuxi 后台/)).toHaveTextContent('服务地址和 API Key');