blueprints : add translate: false to all non-translatable fields

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

site/blueprints/pages/game.yml

@@ -21,6 +21,7 @@ tabs:
           thumbnail:
             label: Vignette
             type: files
+            translate: false
             layout: cards
             size: small
             max: 1
@@ -66,6 +67,7 @@ tabs:
             help: Laissez vide pour afficher "à venir / coming soon"
             translate: false
             type: url
+            translate: false
       - width: 3/10
         fields:
           preview:
@@ -82,6 +84,7 @@ tabs:
           backgroundImage:
             label: Image d'arrière-plan
             type: files
+            translate: false
             multiple: false
             layout: cards