fix(viewer): rendu unifié type markdown pour fichiers texte/JSON/CSV + autofocus arborescence apres import (#89)

frontend/locales/en.json

@@ -1686,6 +1686,7 @@
   "viewer.copy_error": "Copy error",
   "viewer.download": "Download",
   "viewer.download_md": "Download as .md",
+  "viewer.download_file": "Download file",
   "viewer.download_pdf": "Download as PDF",
   "viewer.edit": "Edit",
   "viewer.error": "Loading error",

frontend/locales/fr.json

@@ -1686,6 +1686,7 @@
   "viewer.copy_error": "Erreur lors de la copie",
   "viewer.download": "Télécharger",
   "viewer.download_md": "Télécharger en .md",
+  "viewer.download_file": "Télécharger le fichier",
   "viewer.download_pdf": "Télécharger en PDF",
   "viewer.edit": "Éditer",
   "viewer.error": "Erreur de chargement",