feat(i18n): translate hardcoded article page strings to 5 locales

- Add ArticlePage namespace (backToNewsHub, backToNews, mediaGallery,
  joinLinkedIn, internalRelease) to all 5 locale message files
  (en, it, es, de, vec)
- Replace 5 hardcoded English strings in news/[slug]/page.tsx with
  getTranslations() calls

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

messages/de.json

@@ -184,6 +184,13 @@
         "page": "Seite",
         "of": "von"
     },
+    "ArticlePage": {
+        "backToNewsHub": "Zurück zum News Hub",
+        "backToNews": "Zurück zu Nachrichten",
+        "mediaGallery": "Mediengalerie",
+        "joinLinkedIn": "Diskussion auf LinkedIn beitreten",
+        "internalRelease": "Interne Unternehmensmitteilung"
+    },
     "AuthModal": {
         "b2bPortal": "B2B-Portal",
         "signIn": "Anmelden",

messages/en.json

@@ -184,6 +184,13 @@
     "page": "Page",
     "of": "of"
 },
+"ArticlePage": {
+    "backToNewsHub": "Back to News Hub",
+    "backToNews": "Back to News",
+    "mediaGallery": "Media Gallery",
+    "joinLinkedIn": "Join the conversation on LinkedIn",
+    "internalRelease": "Internal Corporate Release"
+},
 "AuthModal": {
     "b2bPortal": "B2B Portal",
     "signIn": "Sign In",

messages/es.json

@@ -184,6 +184,13 @@
         "page": "Página",
         "of": "de"
     },
+    "ArticlePage": {
+        "backToNewsHub": "Volver al News Hub",
+        "backToNews": "Volver a Noticias",
+        "mediaGallery": "Galería de Medios",
+        "joinLinkedIn": "Únete a la conversación en LinkedIn",
+        "internalRelease": "Comunicado Corporativo Interno"
+    },
     "AuthModal": {
         "b2bPortal": "Portal B2B",
         "signIn": "Iniciar Sesión",

messages/it.json

@@ -184,6 +184,13 @@
         "page": "Pagina",
         "of": "di"
     },
+    "ArticlePage": {
+        "backToNewsHub": "Torna al News Hub",
+        "backToNews": "Torna alle Notizie",
+        "mediaGallery": "Galleria Media",
+        "joinLinkedIn": "Partecipa alla conversazione su LinkedIn",
+        "internalRelease": "Comunicato Aziendale Interno"
+    },
     "AuthModal": {
         "b2bPortal": "Portale B2B",
         "signIn": "Accedi",

messages/vec.json

@@ -184,6 +184,13 @@
         "page": "Pagina",
         "of": "de"
     },
+    "ArticlePage": {
+        "backToNewsHub": "Torna al News Hub",
+        "backToNews": "Torna a łe Notissie",
+        "mediaGallery": "Gałeria Media",
+        "joinLinkedIn": "Parteçipa a ła conversassion su LinkedIn",
+        "internalRelease": "Comunicato Aziendałe Interno"
+    },
     "AuthModal": {
         "b2bPortal": "Portal par ditte",
         "signIn": "Entra chive",