Replace the withheld faceart entry with an invented cosmetics studio

The third Mappe slot referred to the faceart Goslar prototype, which
carries a real business's name, prices and copy that the owner never
approved - so it had to stay nameless behind nameHidden, leaving a
placeholder in the portfolio.

Built a fresh prototype for a fully invented studio instead ("Atelier
Rosenhain" in the invented town of Bad Ellerstein, fictional prices),
matching the other two entries, which are invented businesses too. It
carries the same "frei erfunden" banner as Maison Verte. Source lives
next to the other prototypes:
Downloads/kosmetik-rosenhain-prototyp.html

Uses the house "Rosenholz" palette and the EB Garamond + Archivo
pairing. Verified in the browser: 40 rendered text elements measured,
0 WCAG AA failures (tightest pair 5.22), both fonts actually active,
no horizontal scroll at 1600px or 390px.

The existing entry text already promised "jede Behandlung mit Dauer und
Preis, Termin direkt aus der Liste heraus", so the treatment list with
duration, price and a per-row booking button sits in the hero where the
screenshot shows it. Text left unchanged.

nameHidden is now false and the Mappe renders no placeholders at all.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

content/site.json

@@ -203,10 +203,10 @@
       },
       {
         "kategorie": "Konzeptarbeit · Kosmetikstudio",
-        "titel": "",
+        "titel": "Atelier Rosenhain",
         "text": "Weich, warm, und trotzdem kein Pastellrosa. Jede Behandlung mit Dauer und Preis, Termin direkt aus der Liste heraus. Damit niemand erst anrufen muss, um zu erfahren, was etwas kostet.",
-        "nameHidden": true,
-        "image": ""
+        "nameHidden": false,
+        "image": "/mappe/atelier-rosenhain.webp"
       }
     ]
   },