feat: migrate Payload CMS to MDX and harden static infrastructure

tests/contact-form.e2e.test.ts

@@ -0,0 +1,53 @@
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
+import puppeteer, { Browser, Page } from 'puppeteer';
+
+const BASE_URL = process.env.TEST_URL || 'http://localhost:3000';
+
+describe('Contact Form E2E', () => {
+  let browser: Browser;
+  let page: Page;
+  let isServerUp = false;
+
+  beforeAll(async () => {
+    // Check if server is up
+    try {
+      const res = await fetch(`${BASE_URL}/health`);
+      if (res.ok) isServerUp = true;
+    } catch (e) {
+      isServerUp = false;
+    }
+
+    if (isServerUp) {
+      browser = await puppeteer.launch({
+        headless: true,
+        args: ['--no-sandbox', '--disable-setuid-sandbox'],
+      });
+      page = await browser.newPage();
+    }
+  });
+
+  afterAll(async () => {
+    if (browser) await browser.close();
+  });
+
+  it('should submit the contact form and show success message', async ({ skip }) => {
+    if (!isServerUp) skip();
+
+    await page.goto(`${BASE_URL}/de/kontakt`);
+
+    // Fill the form
+    await page.waitForSelector('input[name="name"]');
+    await page.type('input[name="name"]', 'E2E Tester');
+    await page.type('input[name="email"]', 'testing@mintel.me');
+    await page.type('textarea[name="message"]', 'This is an automated E2E test message.');
+
+    // Submit
+    await page.click('button[type="submit"]');
+
+    // Wait for success message (localized or generic)
+    await page.waitForSelector('[role="alert"]', { timeout: 10000 });
+
+    const text = await page.evaluate(() => document.body.innerText);
+    expect(text).toMatch(/Gesendet|Sent|Erfolgreich|Success/i);
+  }, 30000);
+});