feat: 实现大模型模型列表与供应商管理，并接入 Playwright 测试

补齐 LLM 子菜单路由，落地模型列表与供应商管理页面交互，同时引入功能与视觉回归用例以便后续页面持续验证。

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

e2e/pages/llm-models.spec.ts

@@ -0,0 +1,48 @@
+import { expect, test } from '../fixtures/auth';
+
+test.describe('大模型 / 模型列表', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.goto('/llm/models');
+    await page.getByRole('table').waitFor();
+  });
+
+  test('展示列表及主要操作', async ({ page }) => {
+    await expect(page.getByRole('button', { name: '新增模型' })).toBeVisible();
+    await expect(page.getByRole('table')).toBeVisible();
+    await expect(page.getByText('GPT-4o', { exact: true })).toBeVisible();
+  });
+
+  test('可新增模型', async ({ page }) => {
+    await page.getByRole('button', { name: '新增模型' }).click();
+    const dialog = page.getByRole('dialog', { name: '新增模型' });
+    await expect(dialog).toBeVisible();
+
+    await dialog.getByLabel('模型名称').fill('测试模型');
+    await dialog.getByLabel('模型 ID').fill('test-model');
+    await dialog.getByRole('button', { name: '保 存' }).click();
+
+    await expect(page.getByText('测试模型', { exact: true })).toBeVisible();
+  });
+
+  test('可切换模型状态并查看用量', async ({ page }) => {
+    const statusSwitch = page.getByRole('switch', { name: 'GPT-4o状态' });
+    await expect(statusSwitch).toBeChecked();
+    await statusSwitch.click();
+    await expect(statusSwitch).not.toBeChecked();
+
+    const row = page.getByRole('row').filter({ hasText: 'GPT-4o' });
+    await row.getByRole('button', { name: '用量' }).click();
+    await expect(page.getByText('GPT-4o 用量详情')).toBeVisible();
+    await expect(page.getByText('近 7 日用量趋势')).toBeVisible();
+  });
+
+  test('可调整排序并删除模型', async ({ page }) => {
+    await page.getByRole('spinbutton', { name: 'GPT-4o排序' }).fill('2');
+    await expect(page.locator('.ant-table-tbody .ant-table-row').first()).toContainText('Claude-3.5-Sonnet');
+
+    const row = page.getByRole('row').filter({ hasText: 'GPT-4o' });
+    await row.getByRole('button', { name: '删除' }).click();
+    await page.getByRole('button', { name: '确 定' }).click();
+    await expect(page.getByText('GPT-4o', { exact: true })).toHaveCount(0);
+  });
+});