Diploma A4 print-first (§Design pct.9): certificat la final campanie

Buton "Vezi diploma" pe finale (+ "Joaca din nou"). Overlay #diploma:
certificat A4 portret alb, chenar dublu accent, titlu serif (singurul),
numele copilului = cel mai mare element.

- buildDiploma(): rand de stele per camera (roomStars[], persistat in resume;
  camere sarite = 🔒 "sarita"), cuvant magic in dale (lacate pt sarite),
  footer = data + "creat de {creator}" + marcaj auriu "timpul a expirat"
- camp builder nou: creator ("Creat de")
- @media print izoleaza #diploma (rest visibility:hidden, margin 20mm,
  print-color-adjust:exact)
- exemplu-campanie.html regenerat

Smoke 31/31 (test nou "diploma": nume/titlu/stele/cuvant/creator/inapoi) +
screenshot scratch/diploma.png (A4, camera sarita, footer expirat).
Cluster T10/PR2 complet (D7 + Timer + Muzica + Diploma). Ramas Etapa 2: Adventure Mode v0.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

AGENTS.md

@@ -20,9 +20,9 @@ sursa de adevăr tehnică pentru agenți.
 python3 -m http.server 8000
 
 # Teste (Playwright; fără package.json commitat — vezi tests/AGENTS.md):
-npx playwright test tests/smoke.mjs                    # suita completă: 30/30
+npx playwright test tests/smoke.mjs                    # suita completă: 31/31
 npx playwright test tests/smoke.mjs --grep @regresie   # regresie: 16
-npx playwright test tests/smoke.mjs --grep @campanie   # campanie E2E: 16
+npx playwright test tests/smoke.mjs --grep @campanie   # campanie E2E: 17
 ```
 
 ## Durable Rules (repo-wide)