chore: clean up repo structure

- Add node_modules/, test-results/, e2e-report/, .omp/ to .gitignore
- Remove throwaway debug scripts (debug-pw*.js, debug-login-dom.js)
- Remove empty mock-server/ directory
- Untrack harness artifact (.omp/plans/)
- Add missing project files to git (e2e tests, Dockerfiles, tooling configs)

e2e/overview.spec.ts

@@ -0,0 +1,34 @@
+import { test, expect } from '@playwright/test';
+import { login } from './utils/auth';
+
+test.beforeEach(async ({ page }) => {
+  await login(page);
+  await page.goto('/cgi-bin/luci/admin/services/zt-gateway');
+  await page.waitForSelector('#zt-gateway-root', { timeout: 15_000 });
+});
+
+test('displays gateway table with correct rows', async ({ page }) => {
+  const root = page.locator('#zt-gateway-root');
+  await expect(root).toBeVisible();
+
+  const rows = page.locator('.zt-gateways tbody tr.zt-gateway-row');
+  await expect(rows).toHaveCount(3);
+
+  await expect(page.locator('.zt-gateway-row[data-region="amsterdam"]')).toContainText('Amsterdam');
+  await expect(page.locator('.zt-gateway-row[data-region="tirunelveli"]')).toContainText('Tirunelveli');
+
+  const activeRow = page.locator('.zt-gateway-row', { hasText: 'active' });
+  await expect(activeRow).toHaveCount(1);
+});
+
+test('active gateway radio is disabled', async ({ page }) => {
+  const activeRow = page.locator('.zt-gateway-row', { hasText: 'active' });
+  const radio = activeRow.locator('input[type=radio]');
+  await expect(radio).toBeDisabled();
+});
+
+test('non-active gateway radios are enabled', async ({ page }) => {
+  const tirunelveliRow = page.locator('.zt-gateway-row[data-region="tirunelveli"]');
+  const radio = tirunelveliRow.locator('input[type=radio]');
+  await expect(radio).toBeEnabled();
+});