website: the tester pages get the design system, and content links stop turning purple

Root cause of "no formatting for the points": .info-card and .highlight-box are
scoped per page (.page-technologiak / .page-biztonsagimentes) and the new pages
carry .page-teszteles, so NONE of the card chrome applied - the sections were
unstyled text runs. The tester pages now join the technologiak scope, whose h3
is a flex row (these headings carry an icon).

Three more gaps the new pages exposed, all fixed site-wide rather than patched:
  - There was no base `a` rule at all, so an inline link in body copy fell back
    to the browser default and changed colour once visited. .legal was the only
    place this had been fixed. /gyik, /technologiak and /biztonsagimentes each
    carry such links and had the same bug.
  - `code` was styled only under .legal.
  - A <ul> inside an info-card was unstyled: wrong colour, wrong indent.

Justified body copy on the tester pages, as asked. NOTE: no other page
justifies today, so this is deliberately scoped to .page-teszteles and can be
rolled out site-wide or dropped in one edit. hyphens:auto, because Hungarian
sets badly when justified without it.

site.css -> v=10 on all 20 pages.

sitemap.xml: BOM removed. Search Console shows the freshly submitted clean
sitemap as "Sikertelen lekeres" with an empty last-read, and a BOM before the
XML declaration is a known irritant for its parser. The file is otherwise valid
(18 <url>, parses, served 200 as application/xml). No gate covers sitemap.xml
and the BOM rule is for website/*.html only.

Facts corrected - there are NO testers (operator, this evening): "Tester 1" is a
disposable virtual box and "Tester 2" is a friend whose machine is unassembled
and switched off. The page said "Nehany hely mar betoltve", which was untrue; it
now says the test is starting and all 5 places are open. Same correction in
OUTREACH.md (five people needed, not three), CONTEXT.md, and the terms-1.1 mail,
which in practice has one recipient, not two. No scheduled post claimed a
filled place, so none needed editing.

website/en/contact.html

@@ -26,7 +26,7 @@
     <meta name="twitter:description" content="A question? Write to us: info@felhom.eu">
     <meta name="twitter:image" content="https://felhom.eu/assets/og-image-en.png">
     <!-- shared assets: bump ?v= together on any site.css/icons.svg change -->
-    <link rel="stylesheet" href="/assets/site.css?v=9">
+    <link rel="stylesheet" href="/assets/site.css?v=10">
     <link rel="icon" type="image/png" href="/assets/logo_favicon_2.svg">
     <script defer src="https://stats.felhom.eu/script.js" data-website-id="d419db57-5e1c-48df-bdb3-c29f25fb1661"></script>
 </head>