website: a tester recruitment page, and test terms 1.1 (the domain)

New page pair /teszteles + /en/testing: who the closed test is for, what a
tester needs (machine + internet quoted verbatim from the FAQ, plus a domain),
what they get (terms section 3, nothing new), what we ask for, and how many
places there are. Every "Jelentkezem tesztelonek" button now goes there.

Operator rulings 2026-10-10, recorded in CONTEXT.md:
  D1 - the tester's domain is in the TESTER'S OWN name; Felhom pays its fee for
       two years and the tester keeps it when the test ends or they leave; DNS
       is managed with a token scoped to that one zone only.
  D2 - the closed test runs with at most 5 households.

Terms 1.1 adds section 4 (the domain) with the D1 text; old sections 4-11 are
renumbered 5-12 and nothing else changed. Section 11 promises the testers an
e-mail before a change, so one is drafted for the operator to send.

Registered in site_gates.py TWINS/URL and listed in sitemap.xml.

website/en/index.html

@@ -92,7 +92,7 @@
                 <div class="hero-text">
                     <h1>Your own cloud,<br><span>your own rules</span></h1>
                     <p>Professional home server installation and management, for households in Hungary. You are in charge; we help.</p>
-                    <a href="#closed-test" class="cta-button">I want to be a tester →</a>
+                    <a href="/en/testing" class="cta-button">I want to be a tester →</a>
                 </div>
                 <div class="hero-visual">
                     <img src="/assets/logo.png" alt="Felhom.eu - home server service">
@@ -510,7 +510,7 @@
                 <p class="apps-count">
                     If this interests you, write to us — <strong>it commits you to nothing</strong>, first we just talk
                 </p>
-                <a href="/en/contact?tema=zart-teszt" class="cta-button">
+                <a href="/en/testing" class="cta-button">
                     I want to be a tester →
                 </a>
             </div>