feat: chat — boutons discrets sous l'image, image en onglet d'app, point de non-lus, notification OS, suppression annulable BUG-110

frontend/locales/en.json

@@ -322,8 +322,11 @@
   "chat.attach_error": "Attachment upload failed",
   "chat.channel_general": "General",
   "chat.delete": "Delete this message",
-  "chat.delete_confirm": "Delete this message?",
   "chat.delete_error": "Delete failed",
+  "chat.deleted_message": "This message has been deleted",
+  "chat.undo": "Undo",
+  "chat.download_image": "Download image",
+  "chat.view_image": "View full size",
   "chat.attach_remove": "Remove attachment",
   "chat.button": "Chat",
   "chat.button_title": "Discuss this file",

frontend/locales/fr.json

@@ -322,8 +322,11 @@
   "chat.attach_error": "Échec de l'envoi de la pièce jointe",
   "chat.channel_general": "Général",
   "chat.delete": "Supprimer ce message",
-  "chat.delete_confirm": "Supprimer ce message ?",
   "chat.delete_error": "Échec de la suppression",
+  "chat.deleted_message": "Ce message a été supprimé",
+  "chat.undo": "Annuler",
+  "chat.download_image": "Télécharger l'image",
+  "chat.view_image": "Afficher en grand",
   "chat.attach_remove": "Retirer la pièce jointe",
   "chat.button": "Chat",
   "chat.button_title": "Discuter de ce fichier",