fix(frontend): correct Pages deployment files route

Align the Pages deployment file-list request with the backend route and add a regression test.

frontend/tests/openflare/pages-service.test.ts

@@ -0,0 +1,34 @@
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+import type {AxiosResponse} from 'axios';
+
+import apiClient from '@/lib/services/core/api-client';
+import {PagesService} from '@/lib/services/openflare/pages.service';
+
+vi.mock('@/lib/services/core/api-client', () => ({
+  default: {
+    get: vi.fn(),
+  },
+}));
+
+describe('PagesService', () => {
+  beforeEach(() => {
+    vi.mocked(apiClient.get).mockReset();
+  });
+
+  it('requests deployment files using the backend deployment route', async () => {
+    vi.mocked(apiClient.get).mockResolvedValue({
+      data: {error_msg: '', data: []},
+      status: 200,
+      statusText: 'OK',
+      headers: {},
+      config: {headers: {}},
+    } as AxiosResponse);
+
+    await PagesService.listDeploymentFiles(7);
+
+    expect(apiClient.get).toHaveBeenCalledWith(
+      '/api/v1/d/pages/deployments/7/files',
+      expect.objectContaining({params: undefined}),
+    );
+  });
+});