feat(pdf): preview in Filament modal (iframe) instead of new tab

All "Vizualizare PDF" actions now open a wide (7xl) Filament modal
containing an iframe pointing at the inline PDF endpoint, with a
top-right "Descarcă" and "Deschide în tab nou" fallback.

- WorkOrder edit action + WO table row action
- InjectorProtocol edit action + protocols table row action
- Dashboard Docs tab preview button (Alpine.js overlay since it's
  a plain Blade view, not a Filament action)

The underlying /pdf routes stay unchanged (Content-Disposition: inline,
?download=1 for attachment) — the iframe just loads the same URL.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

lang/ru.json

@@ -670,6 +670,7 @@
     "Deschide fișă nouă": "Открыть новый наряд",
     "Deschide panoul pe telefon și acceptă notificările întâi.": "Сначала откройте панель на телефоне и разрешите уведомления.",
     "Deschide tenantul": "Deschide tenantul",
+    "Deschide în tab nou": "Открыть в новой вкладке",
     "Deschide →": "Открыть →",
     "Deschidere ÎNAINTE": "Открытие ДО",
     "Deschis": "Открыт",
@@ -1623,6 +1624,7 @@
     "Progres": "Прогресс",
     "Progres etapă": "Прогресс этапа",
     "Proprietar": "Владелец",
+    "Protocol": "Протокол",
     "Protocol nou": "Новый протокол",
     "Provider implicit": "Провайдер по умолчанию",
     "Provider:": "Provider:",