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/health.spec.ts

@@ -0,0 +1,39 @@
+import { test, expect } from '@playwright/test';
+import { login, resetToAmsterdam } from './utils/auth';
+
+const PAGE = '/cgi-bin/luci/admin/services/zt-gateway';
+
+test.describe('Health dots', () => {
+  test.beforeEach(async ({ page }) => {
+    await login(page);
+    await resetToAmsterdam(page);
+    await page.goto(PAGE);
+    await page.waitForSelector('.zt-gateways', { timeout: 15_000 });
+  });
+
+  test.afterEach(async ({ page }) => {
+    await resetToAmsterdam(page);
+  });
+
+  test('health dots update after poll refresh', async ({ page }) => {
+    // On initial render every health dot is DOWN (renderHealthDot(false, null)).
+    const allDots = page.locator('.zt-health');
+    const count = await allDots.count();
+    expect(count).toBeGreaterThan(0);
+
+    for (let i = 0; i < count; i++) {
+      await expect(allDots.nth(i)).toHaveClass(/zt-health-down/);
+    }
+
+    // Wait for the first Poll.add(refreshState, 5) cycle plus
+    // async health-check latency.
+    await page.waitForTimeout(8000);
+
+    // At least one dot should now be UP (amsterdam is reachable on 10.99.12.3).
+    await expect(page.locator('.zt-health-up').first()).toBeVisible();
+
+    // Amsterdam's row specifically must be healthy.
+    const amsterdamRow = page.locator('.zt-gateway-row[data-region="amsterdam"]');
+    await expect(amsterdamRow.locator('.zt-health')).toHaveClass(/zt-health-up/);
+  });
+});