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/switch.spec.ts

@@ -0,0 +1,48 @@
+import { test, expect } from '@playwright/test';
+import { login, resetToAmsterdam } from './utils/auth';
+
+const ZT_PAGE = '/cgi-bin/luci/admin/services/zt-gateway';
+
+test.describe('ZT Gateway switch', () => {
+  test.describe.configure({ mode: 'serial' });
+
+  test.beforeEach(async ({ page }) => {
+    await login(page);
+    await resetToAmsterdam(page);
+    await page.goto(ZT_PAGE);
+    await page.waitForSelector('.zt-gateway-row', { timeout: 15_000 });
+  });
+
+  test.afterEach(async ({ page }) => {
+    await resetToAmsterdam(page);
+  });
+
+  test('switches active gateway to tirunelveli', async ({ page }) => {
+    // Select tirunelveli radio button
+    const tirunelveliRow = page.locator('tr.zt-gateway-row[data-region="tirunelveli"]');
+    await tirunelveliRow.locator('input[type="radio"]').click();
+
+    // Click the "Switch to selected" button
+    const switchBtn = page.locator('button.cbi-button-positive', { hasText: 'Switch' });
+    await switchBtn.click();
+
+    // Wait for a notification to appear
+    await page.waitForSelector('.alert-message', { timeout: 10_000 });
+
+    // Poll for the active gateway to change — the RPC takes 12-30s
+    await page.waitForFunction(
+      () => {
+        const row = document.querySelector('tr.zt-gateway-row[data-region="tirunelveli"]');
+        return row?.textContent?.includes('active') ?? false;
+      },
+      { timeout: 45_000, polling: 2_000 },
+    );
+
+    // Verify tirunelveli row now contains "active"
+    await expect(tirunelveliRow).toContainText('active');
+
+    // Verify amsterdam row no longer contains "active"
+    const amsterdamRow = page.locator('tr.zt-gateway-row[data-region="amsterdam"]');
+    await expect(amsterdamRow).not.toContainText('active');
+  });
+});