75 entries in the French locale had an empty value. i18next falls back to the
key when a value is empty, so French users were shown raw English strings
across permission settings, empty states, form placeholders and error toasts.
- fill those 75 entries; no key is added, removed or reordered
- follow the conventions already present in the file: "Entrez ..." for input
hints, "Échec de ..." for failures, Chat -> Conversation, Token left as is
- interpolation placeholders preserved; no existing translation modified
