fix(dragdrop): arborescence récursive, recherche/filtre de dossiers et saisie de sous-dossier (#89)

frontend/locales/en.json

@@ -645,6 +645,8 @@
   "upload.target_vault": "Target Vault",
   "upload.vault_root": "/ (Vault root)",
   "upload.target_directory": "Target subdirectory",
+  "upload.filter_folders": "Filter or search a folder...",
+  "upload.custom_folder": "Or enter a new subfolder path...",
   "upload.import_summary": "Items to import: {files} file(s), {dirs} folder(s)",
   "upload.import_button": "Import",
   "editor.cancel": "Cancel",

frontend/locales/fr.json

@@ -645,6 +645,8 @@
   "upload.target_vault": "Voute cible",
   "upload.vault_root": "/ (Racine de la voute)",
   "upload.target_directory": "Sous-répertoire cible",
+  "upload.filter_folders": "Filtrer ou rechercher un dossier...",
+  "upload.custom_folder": "Ou saisir un nouveau sous-dossier...",
   "upload.import_summary": "Éléments à importer : {files} fichier(s), {dirs} dossier(s)",
   "upload.import_button": "Importer",
   "editor.cancel": "Annuler",